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The Intel PT decoder limits the number of unconditional branches (e.g.
jmps) decoded without consuming any trace packets. Generally, a loop
needs a conditional branch which generates a TNT packet, whereas a "ret"
instruction will generate a TIP or TNT packet. So exceeding the limit is
assumed to be a never-ending loop, which can happen if there has been a
decoding error putting the decoder at the wrong place in the code.
Up until now, the limit of 10000 has been enough but some analytic
purposes have been reported to exceed that.
Increase the limit to 100000, and make it configurable via perf config
intel-pt.max-loops. Also amend the "Never-ending loop" message to
mention the configuration entry.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/20210701175132.3977-1-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Add a function, for use by dlfilters, to read object code.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210627131818.810-11-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Add a function, for use by dlfilters, to return the perf_event_attr
structure.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210627131818.810-10-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Add a function, for use by dlfilters, to return source code file name and
line number.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210627131818.810-9-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Add a function, for use by dlfilters, to return instruction bytes.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210627131818.810-8-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Add a function, for use by dlfilters, to resolve addresses from branch
stacks or callchains.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210627131818.810-7-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Add option --dlarg to pass arguments to dlfilters. The --dlarg option can
be repeated to pass more than 1 argument.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210627131818.810-5-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Add option --list-dlfilters to list dlfilters in the current directory or
the exec-path e.g. ~/libexec/perf-core/dlfilters. Use with option -v (must
come before option --list-dlfilters) to show long descriptions.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210627131818.810-4-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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filter_event_early() can be more than 30% faster than filter_event()
because it is called before internal filtering. In other respects it
is the same as filter_event(), except that it will be passed events
that have yet to be filtered out.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210627131818.810-3-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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In some cases, users want to filter very large amounts of data (e.g.
from AUX area tracing like Intel PT) looking for something specific.
While scripting such as Python can be used, Python is 10 to 20 times
slower than C. So define a C API so that custom filters can be written
and loaded.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210627131818.810-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Added callback option (-G) to support cgroups for 'perf top'.
Added condition to make sure -cgroup and --all-cgroups aren't both enabled.
Example:
$perf top -e cycles -G system.slice/docker-6b95a5eb649c0d671eba3835f0d93973d05a088f3ae8602246bde37affb1ba3e.scope -a --stdio
PerfTop: 3330 irqs/sec kernel:68.2% exact: 0.0% lost: 0/0 drop: 0/11075 [4000Hz cpu-clock], (all, 4 CPUs)
-------------------------------------------------------------------------------------------------------------------------------------------------------
27.32% [unknown] [.] 0x00007f8ab7b69352
11.44% [kernel] [k] 0xffffffff968cd657
3.12% [kernel] [k] 0xffffffff96160e96
2.63% [kernel] [k] 0xffffffff96160eb0
1.96% [kernel] [k] 0xffffffff9615fcf6
1.42% [kernel] [k] 0xffffffff964ddfc7
1.09% [kernel] [k] 0xffffffff96160e90
0.81% [kernel] [k] 0xffffffff96160eb3
0.67% [kernel] [k] 0xffffffff9615fec1
0.57% [kernel] [k] 0xffffffff961ee1d0
0.53% [unknown] [.] 0x00007f8ab7b6666c
0.53% [kernel] [k] 0xffffffff96160e64
0.52% [kernel] [k] 0xffffffff9616c303
0.51% [kernel] [k] 0xffffffffc08e7d50
...
Signed-off-by: Joshua Martinez <joshuamart@google.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: joshua martinez <joshuamart@google.com>
Link: http://lore.kernel.org/lkml/20210616231829.3735671-1-joshuamart@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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The "auxtrace_info" and "auxtrace" functions are not set in "tool" member of
"annotate". As a result, perf annotate does not support parsing itrace data.
Before:
# perf record -e arm_spe_0/branch_filter=1/ -a sleep 1
[ perf record: Woken up 9 times to write data ]
[ perf record: Captured and wrote 20.874 MB perf.data ]
# perf annotate --stdio
Error:
The perf.data data has no samples!
Solution:
1. Add itrace options in help,
2. Set hook functions of "id_index", "auxtrace_info" and "auxtrace" in perf_tool.
After:
# perf record --all-user -e arm_spe_0/branch_filter=1/ ls
Couldn't synthesize bpf events.
perf.data
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.010 MB perf.data ]
# perf annotate --stdio
Percent | Source code & Disassembly of libc-2.28.so for branch-miss (1 samples, percent: local period)
------------------------------------------------------------------------------------------------------------
:
:
:
: Disassembly of section .text:
:
: 0000000000066180 <__getdelim@@GLIBC_2.17>:
0.00 : 66180: stp x29, x30, [sp, #-96]!
0.00 : 66184: cmp x0, #0x0
0.00 : 66188: ccmp x1, #0x0, #0x4, ne // ne = any
0.00 : 6618c: mov x29, sp
0.00 : 66190: stp x24, x25, [sp, #56]
0.00 : 66194: stp x26, x27, [sp, #72]
0.00 : 66198: str x28, [sp, #88]
0.00 : 6619c: b.eq 66450 <__getdelim@@GLIBC_2.17+0x2d0> // b.none
0.00 : 661a0: stp x22, x23, [x29, #40]
0.00 : 661a4: mov x22, x1
0.00 : 661a8: ldr w1, [x3]
0.00 : 661ac: mov w23, w2
0.00 : 661b0: stp x20, x21, [x29, #24]
0.00 : 661b4: mov x20, x3
0.00 : 661b8: mov x21, x0
0.00 : 661bc: tbnz w1, #15, 66360 <__getdelim@@GLIBC_2.17+0x1e0>
0.00 : 661c0: ldr x0, [x3, #136]
0.00 : 661c4: ldr x2, [x0, #8]
0.00 : 661c8: str x19, [x29, #16]
0.00 : 661cc: mrs x19, tpidr_el0
0.00 : 661d0: sub x19, x19, #0x700
0.00 : 661d4: cmp x2, x19
0.00 : 661d8: b.eq 663f0 <__getdelim@@GLIBC_2.17+0x270> // b.none
0.00 : 661dc: mov w1, #0x1 // #1
0.00 : 661e0: ldaxr w2, [x0]
0.00 : 661e4: cmp w2, #0x0
0.00 : 661e8: b.ne 661f4 <__getdelim@@GLIBC_2.17+0x74> // b.any
0.00 : 661ec: stxr w3, w1, [x0]
0.00 : 661f0: cbnz w3, 661e0 <__getdelim@@GLIBC_2.17+0x60>
0.00 : 661f4: b.ne 66448 <__getdelim@@GLIBC_2.17+0x2c8> // b.any
0.00 : 661f8: ldr x0, [x20, #136]
0.00 : 661fc: ldr w1, [x20]
0.00 : 66200: ldr w2, [x0, #4]
0.00 : 66204: str x19, [x0, #8]
0.00 : 66208: add w2, w2, #0x1
0.00 : 6620c: str w2, [x0, #4]
0.00 : 66210: tbnz w1, #5, 66388 <__getdelim@@GLIBC_2.17+0x208>
0.00 : 66214: ldr x19, [x29, #16]
0.00 : 66218: ldr x0, [x21]
0.00 : 6621c: cbz x0, 66228 <__getdelim@@GLIBC_2.17+0xa8>
0.00 : 66220: ldr x0, [x22]
0.00 : 66224: cbnz x0, 6623c <__getdelim@@GLIBC_2.17+0xbc>
0.00 : 66228: mov x0, #0x78 // #120
0.00 : 6622c: str x0, [x22]
0.00 : 66230: bl 20710 <malloc@plt>
0.00 : 66234: str x0, [x21]
0.00 : 66238: cbz x0, 66428 <__getdelim@@GLIBC_2.17+0x2a8>
0.00 : 6623c: ldr x27, [x20, #8]
0.00 : 66240: str x19, [x29, #16]
0.00 : 66244: ldr x19, [x20, #16]
0.00 : 66248: sub x19, x19, x27
0.00 : 6624c: cmp x19, #0x0
0.00 : 66250: b.le 66398 <__getdelim@@GLIBC_2.17+0x218>
0.00 : 66254: mov x25, #0x0 // #0
0.00 : 66258: b 662d8 <__getdelim@@GLIBC_2.17+0x158>
0.00 : 6625c: nop
0.00 : 66260: add x24, x19, x25
0.00 : 66264: ldr x3, [x22]
0.00 : 66268: add x26, x24, #0x1
0.00 : 6626c: ldr x0, [x21]
0.00 : 66270: cmp x3, x26
0.00 : 66274: b.cs 6629c <__getdelim@@GLIBC_2.17+0x11c> // b.hs, b.nlast
0.00 : 66278: lsl x3, x3, #1
0.00 : 6627c: cmp x3, x26
0.00 : 66280: csel x26, x3, x26, cs // cs = hs, nlast
0.00 : 66284: mov x1, x26
0.00 : 66288: bl 206f0 <realloc@plt>
0.00 : 6628c: cbz x0, 66438 <__getdelim@@GLIBC_2.17+0x2b8>
0.00 : 66290: str x0, [x21]
0.00 : 66294: ldr x27, [x20, #8]
0.00 : 66298: str x26, [x22]
0.00 : 6629c: mov x2, x19
0.00 : 662a0: mov x1, x27
0.00 : 662a4: add x0, x0, x25
0.00 : 662a8: bl 87390 <explicit_bzero@@GLIBC_2.25+0x50>
0.00 : 662ac: ldr x0, [x20, #8]
0.00 : 662b0: add x19, x0, x19
0.00 : 662b4: str x19, [x20, #8]
0.00 : 662b8: cbnz x28, 66410 <__getdelim@@GLIBC_2.17+0x290>
0.00 : 662bc: mov x0, x20
0.00 : 662c0: bl 73b80 <__underflow@@GLIBC_2.17>
0.00 : 662c4: cmn w0, #0x1
0.00 : 662c8: b.eq 66410 <__getdelim@@GLIBC_2.17+0x290> // b.none
0.00 : 662cc: ldp x27, x19, [x20, #8]
0.00 : 662d0: mov x25, x24
0.00 : 662d4: sub x19, x19, x27
0.00 : 662d8: mov x2, x19
0.00 : 662dc: mov w1, w23
0.00 : 662e0: mov x0, x27
0.00 : 662e4: bl 807b0 <memchr@@GLIBC_2.17>
0.00 : 662e8: cmp x0, #0x0
0.00 : 662ec: mov x28, x0
0.00 : 662f0: sub x0, x0, x27
0.00 : 662f4: csinc x19, x19, x0, eq // eq = none
0.00 : 662f8: mov x0, #0x7fffffffffffffff // #9223372036854775807
0.00 : 662fc: sub x0, x0, x25
0.00 : 66300: cmp x19, x0
0.00 : 66304: b.lt 66260 <__getdelim@@GLIBC_2.17+0xe0> // b.tstop
0.00 : 66308: adrp x0, 17f000 <sys_sigabbrev@@GLIBC_2.17+0x320>
0.00 : 6630c: ldr x0, [x0, #3624]
0.00 : 66310: mrs x2, tpidr_el0
0.00 : 66314: ldr x19, [x29, #16]
0.00 : 66318: mov w3, #0x4b // #75
0.00 : 6631c: ldr w1, [x20]
0.00 : 66320: mov x24, #0xffffffffffffffff // #-1
0.00 : 66324: str w3, [x2, x0]
0.00 : 66328: tbnz w1, #15, 66340 <__getdelim@@GLIBC_2.17+0x1c0>
0.00 : 6632c: ldr x0, [x20, #136]
0.00 : 66330: ldr w1, [x0, #4]
0.00 : 66334: sub w1, w1, #0x1
0.00 : 66338: str w1, [x0, #4]
0.00 : 6633c: cbz w1, 663b8 <__getdelim@@GLIBC_2.17+0x238>
0.00 : 66340: mov x0, x24
0.00 : 66344: ldr x28, [sp, #88]
0.00 : 66348: ldp x20, x21, [x29, #24]
0.00 : 6634c: ldp x22, x23, [x29, #40]
0.00 : 66350: ldp x24, x25, [sp, #56]
0.00 : 66354: ldp x26, x27, [sp, #72]
0.00 : 66358: ldp x29, x30, [sp], #96
0.00 : 6635c: ret
100.00 : 66360: tbz w1, #5, 66218 <__getdelim@@GLIBC_2.17+0x98>
0.00 : 66364: ldp x20, x21, [x29, #24]
0.00 : 66368: mov x24, #0xffffffffffffffff // #-1
0.00 : 6636c: ldp x22, x23, [x29, #40]
0.00 : 66370: mov x0, x24
0.00 : 66374: ldp x24, x25, [sp, #56]
0.00 : 66378: ldp x26, x27, [sp, #72]
0.00 : 6637c: ldr x28, [sp, #88]
0.00 : 66380: ldp x29, x30, [sp], #96
0.00 : 66384: ret
0.00 : 66388: mov x24, #0xffffffffffffffff // #-1
0.00 : 6638c: ldr x19, [x29, #16]
0.00 : 66390: b 66328 <__getdelim@@GLIBC_2.17+0x1a8>
0.00 : 66394: nop
0.00 : 66398: mov x0, x20
0.00 : 6639c: bl 73b80 <__underflow@@GLIBC_2.17>
0.00 : 663a0: cmn w0, #0x1
0.00 : 663a4: b.eq 66438 <__getdelim@@GLIBC_2.17+0x2b8> // b.none
0.00 : 663a8: ldp x27, x19, [x20, #8]
0.00 : 663ac: sub x19, x19, x27
0.00 : 663b0: b 66254 <__getdelim@@GLIBC_2.17+0xd4>
0.00 : 663b4: nop
0.00 : 663b8: str xzr, [x0, #8]
0.00 : 663bc: ldxr w2, [x0]
0.00 : 663c0: stlxr w3, w1, [x0]
0.00 : 663c4: cbnz w3, 663bc <__getdelim@@GLIBC_2.17+0x23c>
0.00 : 663c8: cmp w2, #0x1
0.00 : 663cc: b.le 66340 <__getdelim@@GLIBC_2.17+0x1c0>
0.00 : 663d0: mov x1, #0x81 // #129
0.00 : 663d4: mov x2, #0x1 // #1
0.00 : 663d8: mov x3, #0x0 // #0
0.00 : 663dc: mov x8, #0x62 // #98
0.00 : 663e0: svc #0x0
0.00 : 663e4: ldp x20, x21, [x29, #24]
0.00 : 663e8: ldp x22, x23, [x29, #40]
0.00 : 663ec: b 66370 <__getdelim@@GLIBC_2.17+0x1f0>
0.00 : 663f0: ldr w2, [x0, #4]
0.00 : 663f4: add w2, w2, #0x1
0.00 : 663f8: str w2, [x0, #4]
0.00 : 663fc: tbz w1, #5, 66214 <__getdelim@@GLIBC_2.17+0x94>
0.00 : 66400: mov x24, #0xffffffffffffffff // #-1
0.00 : 66404: ldr x19, [x29, #16]
0.00 : 66408: b 66330 <__getdelim@@GLIBC_2.17+0x1b0>
0.00 : 6640c: nop
0.00 : 66410: ldr x0, [x21]
0.00 : 66414: strb wzr, [x0, x24]
0.00 : 66418: ldr w1, [x20]
0.00 : 6641c: ldr x19, [x29, #16]
0.00 : 66420: b 66328 <__getdelim@@GLIBC_2.17+0x1a8>
0.00 : 66424: nop
0.00 : 66428: mov x24, #0xffffffffffffffff // #-1
0.00 : 6642c: ldr w1, [x20]
0.00 : 66430: b 66328 <__getdelim@@GLIBC_2.17+0x1a8>
0.00 : 66434: nop
0.00 : 66438: mov x24, #0xffffffffffffffff // #-1
0.00 : 6643c: ldr w1, [x20]
0.00 : 66440: ldr x19, [x29, #16]
0.00 : 66444: b 66328 <__getdelim@@GLIBC_2.17+0x1a8>
0.00 : 66448: bl e3ba0 <pthread_setcanceltype@@GLIBC_2.17+0x30>
0.00 : 6644c: b 661f8 <__getdelim@@GLIBC_2.17+0x78>
0.00 : 66450: adrp x0, 17f000 <sys_sigabbrev@@GLIBC_2.17+0x320>
0.00 : 66454: ldr x0, [x0, #3624]
0.00 : 66458: mrs x1, tpidr_el0
0.00 : 6645c: mov w2, #0x16 // #22
0.00 : 66460: mov x24, #0xffffffffffffffff // #-1
0.00 : 66464: str w2, [x1, x0]
0.00 : 66468: b 66370 <__getdelim@@GLIBC_2.17+0x1f0>
0.00 : 6646c: ldr w1, [x20]
0.00 : 66470: mov x4, x0
0.00 : 66474: tbnz w1, #15, 6648c <__getdelim@@GLIBC_2.17+0x30c>
0.00 : 66478: ldr x0, [x20, #136]
0.00 : 6647c: ldr w1, [x0, #4]
0.00 : 66480: sub w1, w1, #0x1
0.00 : 66484: str w1, [x0, #4]
0.00 : 66488: cbz w1, 66494 <__getdelim@@GLIBC_2.17+0x314>
0.00 : 6648c: mov x0, x4
0.00 : 66490: bl 20e40 <gnu_get_libc_version@@GLIBC_2.17+0x130>
0.00 : 66494: str xzr, [x0, #8]
0.00 : 66498: ldxr w2, [x0]
0.00 : 6649c: stlxr w3, w1, [x0]
0.00 : 664a0: cbnz w3, 66498 <__getdelim@@GLIBC_2.17+0x318>
0.00 : 664a4: cmp w2, #0x1
0.00 : 664a8: b.le 6648c <__getdelim@@GLIBC_2.17+0x30c>
0.00 : 664ac: mov x1, #0x81 // #129
0.00 : 664b0: mov x2, #0x1 // #1
0.00 : 664b4: mov x3, #0x0 // #0
0.00 : 664b8: mov x8, #0x62 // #98
0.00 : 664bc: svc #0x0
0.00 : 664c0: b 6648c <__getdelim@@GLIBC_2.17+0x30c>
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Leo Yan <leo.yan@linaro.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20210615091704.259202-1-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Add a section to notify the permission and sysctl setting for perf
probe. And fix some indentations.
Reported-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/162204068898.388434.16842705842611255787.stgit@devnote2
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Add an instruction trace and a source trace to the intel-pt-events.py
script.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20210530192308.7382-14-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Add new fields and functions to the perf-script-python documentation.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20210530192308.7382-12-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
To pick up fixes from perf/urgent.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Add 'g' (guest) for VM-Entry and 'h' (host) for VM-Exit.
Fixes: c025d46cd932c ("perf script: Add branch types for VM-Entry and VM-Exit")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/20210521175127.27264-1-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Perf has supported the CPU_PMU_CAPS feature to display a list of CPU PMU
capabilities. But on a hybrid platform, it may have several CPU PMUs (such
as "cpu_core" and "cpu_atom"). The CPU_PMU_CAPS feature is hard to extend
to support multiple CPU PMUs well if it needs to be compatible for the case
of old perf data file + new perf tool.
So for better compatibility we now create a new feature HYBRID_CPU_PMU_CAPS
in the header.
For the perf.data generated on hybrid platform,
root@otcpl-adl-s-2:~# perf report --header-only -I
# cpu_core pmu capabilities: branches=32, max_precise=3, pmu_name=alderlake_hybrid
# cpu_atom pmu capabilities: branches=32, max_precise=3, pmu_name=alderlake_hybrid
# missing features: TRACING_DATA BRANCH_STACK GROUP_DESC AUXTRACE STAT CLOCKID DIR_FORMAT COMPRESSED CPU_PMU_CAPS CLOCK_DATA
For the perf.data generated on non-hybrid platform
root@kbl-ppc:~# perf report --header-only -I
# cpu pmu capabilities: branches=32, max_precise=3, pmu_name=skylake
# missing features: TRACING_DATA BRANCH_STACK GROUP_DESC AUXTRACE STAT CLOCKID DIR_FORMAT COMPRESSED CLOCK_DATA HYBRID_TOPOLOGY HYBRID_CPU_PMU_CAPS
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20210514122948.9472-3-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
It is useful to let the user know about the hybrid topology.
Add the HYBRID_TOPOLOGY feature in header to indicate the core CPUs
and the atom CPUs.
With this patch a perf.data generated on a hybrid platform reports
the hybrid CPU list:
root@otcpl-adl-s-2:~# perf report --header-only -I
...
# hybrid cpu system:
# cpu_core cpu list : 0-15
# cpu_atom cpu list : 16-23
For a perf.data generated on a non-hybrid platform, reports a message
that HYBRID_TOPOLOGY is missing:
root@kbl-ppc:~# perf report --header-only -I
...
# missing features: TRACING_DATA BRANCH_STACK GROUP_DESC AUXTRACE STAT CLOCKID DIR_FORMAT COMPRESSED CLOCK_DATA HYBRID_TOPOLOGY
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20210514122948.9472-2-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Add parsing and validation of VM Time Correlation options, and pass
parameters to the decoder. Also update the Intel PT documentation
accordingly.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20210430070309.17624-13-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Intel PT timestamps are affected by virtualization. Add a new option
that will allow the Intel PT decoder to correlate the timestamps and
translate the virtual machine timestamps to host timestamps.
The advantages of making this a separate step, rather than a part of
normal decoding are that it is simpler to implement, and it needs to
be done only once.
This patch adds only the option. Later patches add Intel PT support.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20210430070309.17624-6-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Correlating virtual machine TSC packets is not supported at present, so
instead support the Z itrace option.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20210430070309.17624-4-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Issues correlating timestamps can be avoided with timeless decoding. Add
an option for that, so that timeless decoding can be used even when
timestamps are present.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20210430070309.17624-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Add some words and examples to help understanding of
Intel hybrid perf support.
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210427070139.25256-27-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
so that the compact output is shown by default. Also add 'report.skip-empty'
config option to override the default. Users can also use --no-skip-empty
command line option to change the behavior anytime.
Committer testing:
$ perf report --stat
Aggregated stats:
TOTAL events: 19
COMM events: 2
EXIT events: 1
SAMPLE events: 8
MMAP2 events: 4
FINISHED_ROUND events: 1
THREAD_MAP events: 1
CPU_MAP events: 1
TIME_CONV events: 1
cycles:u stats:
SAMPLE events: 8
$ perf config report.skip-empty=false
$ perf report --stat
Aggregated stats:
TOTAL events: 19
MMAP events: 0
LOST events: 0
COMM events: 2
EXIT events: 1
THROTTLE events: 0
UNTHROTTLE events: 0
FORK events: 0
READ events: 0
SAMPLE events: 8
MMAP2 events: 4
AUX events: 0
ITRACE_START events: 0
LOST_SAMPLES events: 0
SWITCH events: 0
SWITCH_CPU_WIDE events: 0
NAMESPACES events: 0
KSYMBOL events: 0
BPF_EVENT events: 0
CGROUP events: 0
TEXT_POKE events: 0
ATTR events: 0
EVENT_TYPE events: 0
TRACING_DATA events: 0
BUILD_ID events: 0
FINISHED_ROUND events: 1
ID_INDEX events: 0
AUXTRACE_INFO events: 0
AUXTRACE events: 0
AUXTRACE_ERROR events: 0
THREAD_MAP events: 1
CPU_MAP events: 1
STAT_CONFIG events: 0
STAT events: 0
STAT_ROUND events: 0
EVENT_UPDATE events: 0
TIME_CONV events: 1
FEATURE events: 0
COMPRESSED events: 0
cycles:u stats:
SAMPLE events: 8
$ perf config report.skip-empty
report.skip-empty=false
$
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210427013717.1651674-6-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
To make the output more readable, I think it's better to remove 0's in
the output. Also the dummy event has no event stats so it just wasts
the space. Let's use the --skip-empty option to suppress it.
$ perf report --stat --skip-empty
Aggregated stats:
TOTAL events: 16530
MMAP events: 226
COMM events: 1596
EXIT events: 2
THROTTLE events: 121
UNTHROTTLE events: 117
FORK events: 1595
SAMPLE events: 719
MMAP2 events: 12147
CGROUP events: 2
FINISHED_ROUND events: 2
THREAD_MAP events: 1
CPU_MAP events: 1
TIME_CONV events: 1
cycles stats:
SAMPLE events: 719
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210427013717.1651674-5-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
This adds a feature to export perf data to JSON.
The resolved symbols are exported into the JSON so that external tools
don't need to load the dsos themselves (or even have access to them at
all.) This makes it easy to load and analyze perf data with standalone
tools where direct perf or libbabeltrace integration is impractical.
The exporter uses a minimal inline JSON encoding without any external
dependencies. Currently it only outputs some headers and sample metadata
but it's easily extensible.
Use it like this:
$ perf data convert --to-json out.json
Committer notes:
Fixup a __printf() bug that broke the build:
util/data-convert-json.c:103:11: error: expected ‘)’ before numeric constant
103 | __(printf, 5, 6)
| ^~
| )
util/data-convert-json.c: In function ‘output_sample_callchain_entry’:
util/data-convert-json.c:124:2: error: implicit declaration of function ‘output_json_key_format’; did you mean ‘output_json_format’? [-Werror=implicit-function-declaration]
124 | output_json_key_format(out, false, 5, "ip", "\"0x%" PRIx64 "\"", ip);
| ^~~~~~~~~~~~~~~~~~~~~~
| output_json_format
Also had to add this patch to fix errors reported by various versions of
clang:
- if (al && al->sym && al->sym->name && strlen(al->sym->name) > 0) {
+ if (al && al->sym && al->sym->namelen) {
al->sym->name is a zero sized array, to avoid one extra alloc in the
symbol__new() constructor, sym->namelen carries its strlen.
Committer testing:
$ ls -la out.json
ls: cannot access 'out.json': No such file or directory
$ perf record sleep 0.1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.001 MB perf.data (8 samples) ]
$ perf report --stats | grep -w SAMPLE
SAMPLE events: 8
$ perf data convert --to-json out.json
[ perf data convert: Converted 'perf.data' into JSON data 'out.json' ]
[ perf data convert: Converted and wrote 0.002 MB (8 samples) ]
$ ls -la out.json
-rw-rw-r--. 1 acme acme 2017 Apr 26 17:29 out.json
$ cat out.json
{
"linux-perf-json-version": 1,
"headers": {
"header-version": 1,
"captured-on": "2021-04-26T20:28:57Z",
"data-offset": 432,
"data-size": 1016,
"feat-offset": 1448,
"hostname": "five",
"os-release": "5.11.14-200.fc33.x86_64",
"arch": "x86_64",
"cpu-desc": "AMD Ryzen 9 3900X 12-Core Processor",
"cpuid": "AuthenticAMD,23,113,0",
"nrcpus-online": 24,
"nrcpus-avail": 24,
"perf-version": "5.12.gee134f3189bd",
"cmdline": [
"/home/acme/bin/perf",
"record",
"sleep",
"0.1"
]
},
"samples": [
{
"timestamp": 170517539043684,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0xffffffffa6268827"
}
]
},
{
"timestamp": 170517539048443,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0xffffffffa661359d"
}
]
},
{
"timestamp": 170517539051018,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0xffffffffa6311e18"
}
]
},
{
"timestamp": 170517539053652,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0x7fdb77b4812b",
"symbol": "_dl_start",
"dso": "ld-2.32.so"
}
]
},
{
"timestamp": 170517539055306,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0xffffffffa6269286"
}
]
},
{
"timestamp": 170517539057590,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0xffffffffa62abd8b"
}
]
},
{
"timestamp": 170517539067559,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0x7fdb77b5e9e9",
"symbol": "__GI___tunables_init",
"dso": "ld-2.32.so"
}
]
},
{
"timestamp": 170517539282452,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0x7fdb779978d2",
"symbol": "getenv",
"dso": "libc-2.32.so"
}
]
}
]
}
$
Signed-off-by: Nicholas Fraser <nfraser@codeweavers.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Changbin Du <changbin.du@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tan Xiaojun <tanxiaojun@huawei.com>
Cc: Ulrich Czekalla <uczekalla@codeweavers.com>
Link: http://lore.kernel.org/lkml/3884969f-804d-2f53-c648-e2b0bd85edff@codeweavers.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Currently, to use BPF to aggregate perf event counters, the user uses
--bpf-counters option. Enable "use bpf by default" events with a config
option, stat.bpf-counter-events. Events with name in the option will use
BPF.
This also enables mixed BPF event and regular event in the same sesssion.
For example:
perf config stat.bpf-counter-events=instructions
perf stat -e instructions,cs
The second command will use BPF for "instructions" but not "cs".
Signed-off-by: Song Liu <song@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/r/20210425214333.1090950-4-song@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Update Topdown documentation to permit calls to rdpmc, and describe
interaction with system calls.
Signed-off-by: Ray Kinsella <mdr@ashroe.eu>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Link: http://lore.kernel.org/lkml/20210421091009.1711565-1-mdr@ashroe.eu
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
This functionality is based on recently introduced sysfs attributes for
Intel® Xeon® Scalable processor family (code name Skylake-SP):
Commit bb42b3d39781d7fc ("perf/x86/intel/uncore: Expose an Uncore unit to IIO PMON mapping")
Mode is intended to provide four I/O performance metrics in MB per each
PCIe root port:
- Inbound Read: I/O devices below root port read from the host memory
- Inbound Write: I/O devices below root port write to the host memory
- Outbound Read: CPU reads from I/O devices below root port
- Outbound Write: CPU writes to I/O devices below root port
Each metric requiries only one uncore event which increments at every 4B
transfer in corresponding direction. The formulas to compute metrics
are generic:
#EventCount * 4B / (1024 * 1024)
Acked-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey V Bayduraev <alexey.v.bayduraev@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210419094147.15909-4-alexander.antonov@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
'perf annotate' supports --symbol but it's impossible to filter a C++
symbol. With --no-demangle one can filter easily by mangled function
name.
Signed-off-by: Martin Liška <mliska@suse.cz>
Link: http://lore.kernel.org/lkml/c3c7e959-9f7f-18e2-e795-f604275cbac3@suse.cz
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
The pipeline stage cycles details can be recorded on powerpc from the
contents of Performance Monitor Unit (PMU) registers. On ISA v3.1
platform, sampling registers exposes the cycles spent in different
pipeline stages. Patch adds perf tools support to present two of the
cycle counter information along with memory latency (weight).
Re-use the field 'ins_lat' for storing the first pipeline stage cycle.
This is stored in 'var2_w' field of 'perf_sample_weight'.
Add a new field 'p_stage_cyc' to store the second pipeline stage cycle
which is stored in 'var3_w' field of perf_sample_weight.
Add new sort function 'Pipeline Stage Cycle' and include this in
default_mem_sort_order[]. This new sort function may be used to denote
some other pipeline stage in another architecture. So add this to list
of sort entries that can have dynamic header string.
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Reviewed-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Link: https://lore.kernel.org/r/1616425047-1666-5-git-send-email-atrajeev@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
The 'perf stat' subcommand supports the request for a summary of the
interval counter readings. But the summary lines break the CSV output
so it's hard for scripts to parse the result.
Before:
# perf stat -x, -I1000 --interval-count 1 --summary
1.001323097,8013.48,msec,cpu-clock,8013483384,100.00,8.013,CPUs utilized
1.001323097,270,,context-switches,8013513297,100.00,0.034,K/sec
1.001323097,13,,cpu-migrations,8013530032,100.00,0.002,K/sec
1.001323097,184,,page-faults,8013546992,100.00,0.023,K/sec
1.001323097,20574191,,cycles,8013551506,100.00,0.003,GHz
1.001323097,10562267,,instructions,8013564958,100.00,0.51,insn per cycle
1.001323097,2019244,,branches,8013575673,100.00,0.252,M/sec
1.001323097,106152,,branch-misses,8013585776,100.00,5.26,of all branches
8013.48,msec,cpu-clock,8013483384,100.00,7.984,CPUs utilized
270,,context-switches,8013513297,100.00,0.034,K/sec
13,,cpu-migrations,8013530032,100.00,0.002,K/sec
184,,page-faults,8013546992,100.00,0.023,K/sec
20574191,,cycles,8013551506,100.00,0.003,GHz
10562267,,instructions,8013564958,100.00,0.51,insn per cycle
2019244,,branches,8013575673,100.00,0.252,M/sec
106152,,branch-misses,8013585776,100.00,5.26,of all branches
The summary line loses the timestamp column, which breaks the CSV
output.
We add a column at the original 'timestamp' position and it just says
'summary' for the summary line.
After:
# perf stat -x, -I1000 --interval-count 1 --summary
1.001196053,8012.72,msec,cpu-clock,8012722903,100.00,8.013,CPUs utilized
1.001196053,218,,context-switches,8012753271,100.00,0.027,K/sec
1.001196053,9,,cpu-migrations,8012769767,100.00,0.001,K/sec
1.001196053,0,,page-faults,8012786257,100.00,0.000,K/sec
1.001196053,15004518,,cycles,8012790637,100.00,0.002,GHz
1.001196053,7954691,,instructions,8012804027,100.00,0.53,insn per cycle
1.001196053,1590259,,branches,8012814766,100.00,0.198,M/sec
1.001196053,82601,,branch-misses,8012824365,100.00,5.19,of all branches
summary,8012.72,msec,cpu-clock,8012722903,100.00,7.986,CPUs utilized
summary,218,,context-switches,8012753271,100.00,0.027,K/sec
summary,9,,cpu-migrations,8012769767,100.00,0.001,K/sec
summary,0,,page-faults,8012786257,100.00,0.000,K/sec
summary,15004518,,cycles,8012790637,100.00,0.002,GHz
summary,7954691,,instructions,8012804027,100.00,0.53,insn per cycle
summary,1590259,,branches,8012814766,100.00,0.198,M/sec
summary,82601,,branch-misses,8012824365,100.00,5.19,of all branches
Now it's easy for script to analyse the summary lines.
Of course, we also consider not to break possible existing scripts which
can continue to use the broken CSV format by using a new '--no-csv-summary.'
option.
# perf stat -x, -I1000 --interval-count 1 --summary --no-csv-summary
1.001213261,8012.67,msec,cpu-clock,8012672327,100.00,8.013,CPUs utilized
1.001213261,197,,context-switches,8012703742,100.00,24.586,/sec
1.001213261,9,,cpu-migrations,8012720902,100.00,1.123,/sec
1.001213261,644,,page-faults,8012738266,100.00,80.373,/sec
1.001213261,18350698,,cycles,8012744109,100.00,0.002,GHz
1.001213261,12745021,,instructions,8012759001,100.00,0.69,insn per cycle
1.001213261,2458033,,branches,8012770864,100.00,306.768,K/sec
1.001213261,102107,,branch-misses,8012781751,100.00,4.15,of all branches
8012.67,msec,cpu-clock,8012672327,100.00,7.985,CPUs utilized
197,,context-switches,8012703742,100.00,24.586,/sec
9,,cpu-migrations,8012720902,100.00,1.123,/sec
644,,page-faults,8012738266,100.00,80.373,/sec
18350698,,cycles,8012744109,100.00,0.002,GHz
12745021,,instructions,8012759001,100.00,0.69,insn per cycle
2458033,,branches,8012770864,100.00,306.768,K/sec
102107,,branch-misses,8012781751,100.00,4.15,of all branches
This option can be enabled in perf config by setting the variable
'stat.no-csv-summary'.
# perf config stat.no-csv-summary=true
# perf config -l
stat.no-csv-summary=true
# perf stat -x, -I1000 --interval-count 1 --summary
1.001330198,8013.28,msec,cpu-clock,8013279201,100.00,8.013,CPUs utilized
1.001330198,205,,context-switches,8013308394,100.00,25.583,/sec
1.001330198,10,,cpu-migrations,8013324681,100.00,1.248,/sec
1.001330198,0,,page-faults,8013340926,100.00,0.000,/sec
1.001330198,8027742,,cycles,8013344503,100.00,0.001,GHz
1.001330198,2871717,,instructions,8013356501,100.00,0.36,insn per cycle
1.001330198,553564,,branches,8013366204,100.00,69.081,K/sec
1.001330198,54021,,branch-misses,8013375952,100.00,9.76,of all branches
8013.28,msec,cpu-clock,8013279201,100.00,7.985,CPUs utilized
205,,context-switches,8013308394,100.00,25.583,/sec
10,,cpu-migrations,8013324681,100.00,1.248,/sec
0,,page-faults,8013340926,100.00,0.000,/sec
8027742,,cycles,8013344503,100.00,0.001,GHz
2871717,,instructions,8013356501,100.00,0.36,insn per cycle
553564,,branches,8013366204,100.00,69.081,K/sec
54021,,branch-misses,8013375952,100.00,9.76,of all branches
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20210319070156.20394-1-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
The perf tool uses performance monitoring counters (PMCs) to monitor
system performance. The PMCs are limited hardware resources. For
example, Intel CPUs have 3x fixed PMCs and 4x programmable PMCs per cpu.
Modern data center systems use these PMCs in many different ways: system
level monitoring, (maybe nested) container level monitoring, per process
monitoring, profiling (in sample mode), etc. In some cases, there are
more active perf_events than available hardware PMCs. To allow all
perf_events to have a chance to run, it is necessary to do expensive
time multiplexing of events.
On the other hand, many monitoring tools count the common metrics
(cycles, instructions). It is a waste to have multiple tools create
multiple perf_events of "cycles" and occupy multiple PMCs.
bperf tries to reduce such wastes by allowing multiple perf_events of
"cycles" or "instructions" (at different scopes) to share PMUs. Instead
of having each perf-stat session to read its own perf_events, bperf uses
BPF programs to read the perf_events and aggregate readings to BPF maps.
Then, the perf-stat session(s) reads the values from these BPF maps.
Please refer to the comment before the definition of bperf_ops for the
description of bperf architecture.
bperf is off by default. To enable it, pass --bpf-counters option to
perf-stat. bperf uses a BPF hashmap to share information about BPF
programs and maps used by bperf. This map is pinned to bpffs. The
default path is /sys/fs/bpf/perf_attr_map. The user could change the
path with option --bpf-attr-map.
Committer testing:
# dmesg|grep "Performance Events" -A5
[ 0.225277] Performance Events: Fam17h+ core perfctr, AMD PMU driver.
[ 0.225280] ... version: 0
[ 0.225280] ... bit width: 48
[ 0.225281] ... generic registers: 6
[ 0.225281] ... value mask: 0000ffffffffffff
[ 0.225281] ... max period: 00007fffffffffff
#
# for a in $(seq 6) ; do perf stat -a -e cycles,instructions sleep 100000 & done
[1] 2436231
[2] 2436232
[3] 2436233
[4] 2436234
[5] 2436235
[6] 2436236
# perf stat -a -e cycles,instructions sleep 0.1
Performance counter stats for 'system wide':
310,326,987 cycles (41.87%)
236,143,290 instructions # 0.76 insn per cycle (41.87%)
0.100800885 seconds time elapsed
#
We can see that the counters were enabled for this workload 41.87% of
the time.
Now with --bpf-counters:
# for a in $(seq 32) ; do perf stat --bpf-counters -a -e cycles,instructions sleep 100000 & done
[1] 2436514
[2] 2436515
[3] 2436516
[4] 2436517
[5] 2436518
[6] 2436519
[7] 2436520
[8] 2436521
[9] 2436522
[10] 2436523
[11] 2436524
[12] 2436525
[13] 2436526
[14] 2436527
[15] 2436528
[16] 2436529
[17] 2436530
[18] 2436531
[19] 2436532
[20] 2436533
[21] 2436534
[22] 2436535
[23] 2436536
[24] 2436537
[25] 2436538
[26] 2436539
[27] 2436540
[28] 2436541
[29] 2436542
[30] 2436543
[31] 2436544
[32] 2436545
#
# ls -la /sys/fs/bpf/perf_attr_map
-rw-------. 1 root root 0 Mar 23 14:53 /sys/fs/bpf/perf_attr_map
# bpftool map | grep bperf | wc -l
64
#
# bpftool map | tail
1265: percpu_array name accum_readings flags 0x0
key 4B value 24B max_entries 1 memlock 4096B
1266: hash name filter flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
1267: array name bperf_fo.bss flags 0x400
key 4B value 8B max_entries 1 memlock 4096B
btf_id 996
pids perf(2436545)
1268: percpu_array name accum_readings flags 0x0
key 4B value 24B max_entries 1 memlock 4096B
1269: hash name filter flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
1270: array name bperf_fo.bss flags 0x400
key 4B value 8B max_entries 1 memlock 4096B
btf_id 997
pids perf(2436541)
1285: array name pid_iter.rodata flags 0x480
key 4B value 4B max_entries 1 memlock 4096B
btf_id 1017 frozen
pids bpftool(2437504)
1286: array flags 0x0
key 4B value 32B max_entries 1 memlock 4096B
#
# bpftool map dump id 1268 | tail
value (CPU 21):
8f f3 bc ca 00 00 00 00 80 fd 2a d1 4d 00 00 00
80 fd 2a d1 4d 00 00 00
value (CPU 22):
7e d5 64 4d 00 00 00 00 a4 8a 2e ee 4d 00 00 00
a4 8a 2e ee 4d 00 00 00
value (CPU 23):
a7 78 3e 06 01 00 00 00 b2 34 94 f6 4d 00 00 00
b2 34 94 f6 4d 00 00 00
Found 1 element
# bpftool map dump id 1268 | tail
value (CPU 21):
c6 8b d9 ca 00 00 00 00 20 c6 fc 83 4e 00 00 00
20 c6 fc 83 4e 00 00 00
value (CPU 22):
9c b4 d2 4d 00 00 00 00 3e 0c df 89 4e 00 00 00
3e 0c df 89 4e 00 00 00
value (CPU 23):
18 43 66 06 01 00 00 00 5b 69 ed 83 4e 00 00 00
5b 69 ed 83 4e 00 00 00
Found 1 element
# bpftool map dump id 1268 | tail
value (CPU 21):
f2 6e db ca 00 00 00 00 92 67 4c ba 4e 00 00 00
92 67 4c ba 4e 00 00 00
value (CPU 22):
dc 8e e1 4d 00 00 00 00 d9 32 7a c5 4e 00 00 00
d9 32 7a c5 4e 00 00 00
value (CPU 23):
bd 2b 73 06 01 00 00 00 7c 73 87 bf 4e 00 00 00
7c 73 87 bf 4e 00 00 00
Found 1 element
#
# perf stat --bpf-counters -a -e cycles,instructions sleep 0.1
Performance counter stats for 'system wide':
119,410,122 cycles
152,105,479 instructions # 1.27 insn per cycle
0.101395093 seconds time elapsed
#
See? We had the counters enabled all the time.
Signed-off-by: Song Liu <songliubraving@fb.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: kernel-team@fb.com
Link: http://lore.kernel.org/lkml/20210316211837.910506-2-songliubraving@fb.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Fix ~124 single-word typos and a few spelling errors in the perf tooling code,
accumulated over the years.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210321113734.GA248990@gmail.com
Link: http://lore.kernel.org/lkml/20210323160915.GA61903@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
The existing text was way too terse, pick the intended usage from the
cset that introduced this option.
Twitter: https://twitter.com/_monoid/status/1371461130175004672?s=20
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
To pick up the fixes sent for v5.12 and continue development based on
v5.12-rc2, i.e. without the swap on file bug.
This also gets a slightly newer and better tools/perf/arch/arm/util/cs-etm.c
patch version, using the BIT() macro, that had already been slated to
v5.13 but ended up going to v5.12-rc1 on an older version.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Option doesn't take a value, make sure the man pages agree. For example:
$ perf evlist --verbose=1
Error: option `verbose' takes no value
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20210226183145.1878782-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Committer notes:
This allows setting this in from the command line:
$ perf config annotate.demangle
$ perf config annotate.demangle=yes
$ perf config annotate.demangle
annotate.demangle=yes
$ cat ~/.perfconfig
# this file is auto-generated.
[report]
sort-order = srcline
[annotate]
demangle = yes
$
$
$ perf config annotate.demangle_kernel
$ perf config annotate.demangle_kernel=yes
$ perf config annotate.demangle_kernel
annotate.demangle_kernel=yes
$ cat ~/.perfconfig
# this file is auto-generated.
[report]
sort-order = srcline
[annotate]
demangle = yes
demangle_kernel = yes
$
Signed-off-by: Martin Liška <mliska@suse.cz>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Link: https://lore.kernel.org/r/c96aabe7-791f-9503-295f-3147a9d19b60@suse.cz
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Warning "dso not found" is reported when using "perf report -D".
66702781413407 0x32c0 [0x30]: PERF_RECORD_SAMPLE(IP, 0x2): 28177/28177: 0x55e493e00563 period: 106578 addr: 0
... thread: perf:28177
...... dso: <not found>
66702727832429 0x9dd8 [0x38]: PERF_RECORD_COMM exec: triad_loop:28177/28177
The PERF_RECORD_SAMPLE event (timestamp: 66702781413407) should be after the
PERF_RECORD_COMM event (timestamp: 66702727832429), but it's early processed.
So for most of cases, it makes sense to keep the event ordered even for dump
mode. But it would be also useful to disable ordered_events for reporting raw
dump to see events as they are stored in the perf.data file.
So now, set ordered_events by default to true and add a new option
'disable-order' to disable it. For example,
perf report -D --disable-order
Fixes: 977f739b7126b ("perf report: Disable ordered_events for raw dump")
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210219070005.12397-1-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Add all other man pages to the "see also" list except for
perf-script-perl and perf-script-python that are linked to from
perf-script.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20201120063037.3166069-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Add documentation to the perf-intel-pt man page for tracing virtual
machines.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20210218095801.19576-12-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Emitting a PSB+ can cause a CPU a slight delay. When doing timing analysis
of code with Intel PT, it is useful to know if a timing bubble was caused
by Intel PT or not. Add reporting of PSB events via perf script. PSB
events are printed with the existing itrace 'p' option which also prints
power and frequency changes. The PSB event contains the trace offset at
which the PSB occurs, to allow easy reference back to the PSB+ packets.
The PSB event timestamp is always the timestamp from the PSB+ TSC
packet, and the ip is always the address from the PSB+ FUP packet.
The code changes are non-trivial because the decoder must walk to the
PSB+ FUP address before outputting the PSB event.
Example:
$ perf record -e intel_pt/cyc,psb_period=0/u uname
Linux
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.046 MB perf.data ]
$ perf script --itrace=p --ns
perf 17981 [006] 25617.510820383: psb: psb offs: 0 0 [unknown] ([unknown])
perf 17981 [006] 25617.510820383: cbr: cbr: 42 freq: 4219 MHz (156%) 0 [unknown] ([unknown])
uname 17981 [006] 25617.510889753: psb: psb offs: 0xb50 7f78c12a212e __GI___tunables_init+0xee (/usr/lib/x86_64-linux-gnu/ld-2.31.so)
uname 17981 [006] 25617.510899162: psb: psb offs: 0x12d0 7f78c128af1c dl_main+0x93c (/usr/lib/x86_64-linux-gnu/ld-2.31.so)
uname 17981 [006] 25617.510939242: psb: psb offs: 0x1a50 7f78c128eefc _dl_map_object_from_fd+0x13c (/usr/lib/x86_64-linux-gnu/ld-2.31.so)
uname 17981 [006] 25617.510981274: psb: psb offs: 0x21c8 7f78c1296307 _dl_relocate_object+0x927 (/usr/lib/x86_64-linux-gnu/ld-2.31.so)
uname 17981 [006] 25617.510993034: psb: psb offs: 0x2948 7f78c12940e4 _dl_lookup_symbol_x+0x14 (/usr/lib/x86_64-linux-gnu/ld-2.31.so)
uname 17981 [006] 25617.511003871: psb: psb offs: 0x30c8 7f78c12937b3 do_lookup_x+0x2f3 (/usr/lib/x86_64-linux-gnu/ld-2.31.so)
uname 17981 [006] 25617.511019854: psb: psb offs: 0x3850 7f78c1295eed _dl_relocate_object+0x50d (/usr/lib/x86_64-linux-gnu/ld-2.31.so)
uname 17981 [006] 25617.511029015: psb: psb offs: 0x4390 7f78c12a855a strcmp+0xf6a (/usr/lib/x86_64-linux-gnu/ld-2.31.so)
uname 17981 [006] 25617.511064876: psb: psb offs: 0x4b10 0 [unknown] ([unknown])
uname 17981 [006] 25617.511080762: psb: psb offs: 0x5290 7f78c11db53d _dl_addr+0x13d (/usr/lib/x86_64-linux-gnu/libc-2.31.so)
uname 17981 [006] 25617.511086035: psb: psb offs: 0x5a08 7f78c11db538 _dl_addr+0x138 (/usr/lib/x86_64-linux-gnu/libc-2.31.so)
uname 17981 [006] 25617.511091381: psb: psb offs: 0x6190 7f78c11db534 _dl_addr+0x134 (/usr/lib/x86_64-linux-gnu/libc-2.31.so)
uname 17981 [006] 25617.511096681: psb: psb offs: 0x6910 7f78c11db4c3 _dl_addr+0xc3 (/usr/lib/x86_64-linux-gnu/libc-2.31.so)
uname 17981 [006] 25617.511119520: psb: psb offs: 0x7090 7f78c10ada5e _nl_intern_locale_data+0x12e (/usr/lib/x86_64-linux-gnu/libc-2.31.so)
uname 17981 [006] 25617.511126584: psb: psb offs: 0x7818 7f78c10ada50 _nl_intern_locale_data+0x120 (/usr/lib/x86_64-linux-gnu/libc-2.31.so)
uname 17981 [006] 25617.511132775: psb: psb offs: 0x8358 7f78c10c20c0 getenv+0xa0 (/usr/lib/x86_64-linux-gnu/libc-2.31.so)
uname 17981 [006] 25617.511134598: psb: psb offs: 0x8ad0 7f78c10ada09 _nl_intern_locale_data+0xd9 (/usr/lib/x86_64-linux-gnu/libc-2.31.so)
uname 17981 [006] 25617.511135685: psb: psb offs: 0x9258 7f78c10ada50 _nl_intern_locale_data+0x120 (/usr/lib/x86_64-linux-gnu/libc-2.31.so)
uname 17981 [006] 25617.511138322: psb: psb offs: 0x99d0 7f78c11fffd9 __strncmp_avx2+0x39 (/usr/lib/x86_64-linux-gnu/libc-2.31.so)
uname 17981 [006] 25617.511158907: psb: psb offs: 0xa150 0 [unknown] ([unknown])
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20210205175350.23817-5-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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As started by commit 05a5f51ca566 ("Documentation: Replace lkml.org
links with lore"), replace lkml.org links with lore to better use a
single source that's more likely to stay available long-term.
Signed-off-by: Kees Kook <keescook@chromium.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Joe Perches <joe@perches.com>
Cc: Kees Kook <keescook@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Link: http://lore.kernel.org/lkml/20210210234220.2401035-1-keescook@chromium.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Add usage examples to the man page.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20210208200908.1019149-19-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Add a 'ping' command to verify that the 'perf record' session is up and
operational.
It's used in the following patches via test code to make sure 'perf
record' is ready to receive signals.
Example:
# cat ~/.perfconfig
[daemon]
base=/opt/perfdata
[session-cycles]
run = -m 10M -e cycles --overwrite --switch-output -a
[session-sched]
run = -m 20M -e sched:* --overwrite --switch-output -a
Start the daemon:
# perf daemon start
Ping all sessions:
# perf daemon ping
OK cycles
OK sched
Ping specific session:
# perf daemon ping --session sched
OK sched
Committer notes:
Fixed up bug pointed by clang:
Buggy:
if (!pollfd.revents & POLLIN)
Correct code:
if (!(pollfd.revents & POLLIN))
clang warning:
builtin-daemon.c:560:6: error: logical not is only applied to the left hand side of this bitwise operator [-Werror,-Wlogical-not-parentheses]
if (!pollfd.revents & POLLIN) {
^ ~
builtin-daemon.c:560:6: note: add parentheses after the '!' to evaluate the bitwise operator first
Also use designated initialized with pollfd, i.e.:
struct pollfd pollfd = { .events = POLLIN, };
Instead of:
struct pollfd pollfd = { 0, };
To get past:
builtin-daemon.c:510:30: error: missing field 'events' initializer [-Werror,-Wmissing-field-initializers]
struct pollfd pollfd = { 0, };
^
1 error generated.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20210208200908.1019149-16-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Setup control fifos for session and add --control option to session
arguments.
Example:
# cat ~/.perfconfig
[daemon]
base=/opt/perfdata
[session-cycles]
run = -m 10M -e cycles --overwrite --switch-output -a
[session-sched]
run = -m 20M -e sched:* --overwrite --switch-output -a
Starting the daemon:
# perf daemon start
Use can list control fifos with (control and ack files):
# perf daemon -v
[776459:daemon] base: /opt/perfdata
output: /opt/perfdata/output
lock: /opt/perfdata/lock
[776460:cycles] perf record -m 20M -e cycles --overwrite --switch-output -a
base: /opt/perfdata/session-cycles
output: /opt/perfdata/session-cycles/output
control: /opt/perfdata/session-cycles/control
ack: /opt/perfdata/session-cycles/ack
[776461:sched] perf record -m 20M -e sched:* --overwrite --switch-output -a
base: /opt/perfdata/session-sched
output: /opt/perfdata/session-sched/output
control: /opt/perfdata/session-sched/control
ack: /opt/perfdata/session-sched/ack
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20210208200908.1019149-15-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Add 'lock' file under daemon base and flock it, so only one perf daemon
can run on top of it.
Each daemon tries to create and lock BASE/lock file, if it's successful
we are sure we're the only daemon running over the BASE.
Once daemon is finished, file descriptor to lock file is closed and lock
is released.
Example:
# cat ~/.perfconfig
[daemon]
base=/opt/perfdata
[session-cycles]
run = -m 10M -e cycles --overwrite --switch-output -a
[session-sched]
run = -m 20M -e sched:* --overwrite --switch-output -a
Starting the daemon:
# perf daemon start
And try once more:
# perf daemon start
failed: another perf daemon (pid 775594) owns /opt/perfdata
will end up with an error, because there's already one running
on top of /opt/perfdata.
Committer notes:
Provide lockf(F_TLOCK) when not available, i.e. transform:
lockf(fd, F_TLOCK, 0);
into:
flock(fd, LOCK_EX | LOCK_NB);
Which should be equivalent.
Noticed when cross building to some odd Android NDK.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20210208200908.1019149-14-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Add 'perf daemon stop' command to stop daemon process and all running
sessions.
Example:
# cat ~/.perfconfig
[daemon]
base=/opt/perfdata
[session-cycles]
run = -m 10M -e cycles --overwrite --switch-output -a
[session-sched]
run = -m 20M -e sched:* --overwrite --switch-output -a
Start the daemon:
# perf daemon start
Stop the daemon
# perf daemon stop
Daemon is not running, nothing to connect to:
# perf daemon
connect error: Connection refused
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20210208200908.1019149-13-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Allow the 'perf daemon' to send SIGUSR2 to all running sessions or just
to a specific session.
Example:
# cat ~/.perfconfig
[daemon]
base=/opt/perfdata
[session-cycles]
run = -m 10M -e cycles --overwrite --switch-output -a
[session-sched]
run = -m 20M -e sched:* --overwrite --switch-output -a
Start the daemon:
# perf daemon start
Send signal to all running sessions:
# perf daemon signal
signal 12 sent to session 'cycles [773738]'
signal 12 sent to session 'sched [773739]'
Or to specific one:
# perf daemon signal --session sched
signal 12 sent to session 'sched [773739]'
And verify signals were delivered and perf.data dumped:
# cat /opt/perfdata/session-cycles/output
rounding mmap pages size to 32M (8192 pages)
[ perf record: dump data: Woken up 1 times ]
[ perf record: Dump perf.data.2021010220382490 ]
# car /opt/perfdata/session-sched/output
rounding mmap pages size to 32M (8192 pages)
[ perf record: dump data: Woken up 1 times ]
[ perf record: Dump perf.data.2021010220382489 ]
[ perf record: dump data: Woken up 1 times ]
[ perf record: Dump perf.data.2021010220393745 ]
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20210208200908.1019149-12-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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