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2014-06-09perf tools: Update mmap2 interface with protection and flag bitsDon Zickus
The kernel piece passes more info now. Update the perf tool to reflect that and adjust the synthesized maps to play along. Signed-off-by: Don Zickus <dzickus@redhat.com> Link: http://lkml.kernel.org/r/1400526833-141779-4-git-send-email-dzickus@redhat.com Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-09perf: Pass protection and flags bits through mmap2 interfacePeter Zijlstra
The mmap2 interface was missing the protection and flags bits needed to accurately determine if a mmap memory area was shared or private and if it was readable or not. Signed-off-by: Peter Zijlstra <peterz@infradead.org> [tweaked patch to compile and wrote changelog] Signed-off-by: Don Zickus <dzickus@redhat.com> Link: http://lkml.kernel.org/r/1400526833-141779-2-git-send-email-dzickus@redhat.com Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-09perf script/python: Print array argument as stringNamhyung Kim
With the Sebastian's change of handling num array argument (of raw syscall enter), the script still failed to work like this: $ perf record -e raw_syscalls:* sleep 1 $ perf script -g python $ perf script -s perf-script.py ... Traceback (most recent call last): File "perf-script.py", line 42, in raw_syscalls__sys_enter (id, args), TypeError: %u format: a number is required, not list Fatal Python error: problem in Python trace event handler Aborted (core dumped) This is because the generated script tries to print the array arg as unsigned integer (%u). Since the python seems to convert arguments to strings by default, just using %s solved the problem for me. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Link: http://lkml.kernel.org/r/1401338695-18837-1-git-send-email-namhyung@kernel.org Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-09perf tools: Prettify the tags/TAGS/cscope targets outputJiri Olsa
Add tags/TAGS/cscope targets to the quiet family. $ make tags cscope BUILD: Doing 'make -j4' parallel build GEN tags $ make cscope BUILD: Doing 'make -j4' parallel build GEN cscope Reviewed-by: David Ahern <dsahern@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jean Pihet <jean.pihet@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1401893676-32205-1-git-send-email-jolsa@kernel.org Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-09perf tools: Fix pipe check regression in attr event callbackJiri Olsa
The file factoring in builtin-inject.c object introduced regression in attr event callback. The commit is: 3406912 perf inject: Handle output file via perf_data_file object Following hunk reversed the logic: - if (!inject->pipe_output) + if (&inject->output.is_pipe) putting it back, following example now works: $ perf record -o - kill | perf inject -b | perf report -i - Plus removing extra '&' (kudos to Arnaldo) Reported-by: Stephane Eranian <eranian@google.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20140605204117.GA1771@krava.redhat.com Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-07tools lib traceevent: Added support for __get_bitmask() macroSteven Rostedt (Red Hat)
Coming in v3.16, trace events will be able to save bitmasks in raw format in the ring buffer and output it with the __get_bitmask() macro. In order for userspace tools to parse this, it must be able to handle the __get_bitmask() call and be able to convert the data that's in the ring buffer into a nice bitmask format. The output is similar to what the kernel uses to print bitmasks, with a comma separator every 4 bytes (8 characters). This allows for cpumasks to also be saved efficiently. The first user is the thermal:thermal_power_limit event which has the following output: thermal_power_limit: cpus=0000000f freq=1900000 cdev_state=0 power=5252 Link: http://lkml.kernel.org/r/20140506132238.22e136d1@gandalf.local.home Suggested-by: Javi Merino <javi.merino@arm.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Acked-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Javi Merino <javi.merino@arm.com> Link: http://lkml.kernel.org/r/20140603032224.229186537@goodmis.org Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-07tools lib traceevent: Add options to function pluginSteven Rostedt (Red Hat)
Add the options "parent" and "indent" to the function plugin. When parent is set, the output looks like this: function: fsnotify_modify <-- vfs_write function: zone_statistics <-- get_page_from_freelist function: __inc_zone_state <-- zone_statistics function: inotify_inode_queue_event <-- fsnotify_modify function: fsnotify_parent <-- fsnotify_modify function: __inc_zone_state <-- zone_statistics function: __fsnotify_parent <-- fsnotify_parent function: inotify_dentry_parent_queue_event <-- fsnotify_parent function: add_to_page_cache_lru <-- do_read_cache_page When it's not set, it looks like: function: fsnotify_modify function: zone_statistics function: __inc_zone_state function: inotify_inode_queue_event function: fsnotify_parent function: __inc_zone_state function: __fsnotify_parent function: inotify_dentry_parent_queue_event function: add_to_page_cache_lru When the otpion "indent" is not set, it looks like this: function: fsnotify_modify <-- vfs_write function: zone_statistics <-- get_page_from_freelist function: __inc_zone_state <-- zone_statistics function: inotify_inode_queue_event <-- fsnotify_modify function: fsnotify_parent <-- fsnotify_modify function: __inc_zone_state <-- zone_statistics function: __fsnotify_parent <-- fsnotify_parent function: inotify_dentry_parent_queue_event <-- fsnotify_parent function: add_to_page_cache_lru <-- do_read_cache_page Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Acked-by: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/20140603032224.056940410@goodmis.org Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-07tools lib traceevent: Add options to pluginsSteven Rostedt
The traceevent plugins allows developers to have their events print out information that is more advanced than what can be achieved by the trace event format files. As these plugins are used on the userspace side of the tracing tools, it is only logical that the tools should be able to produce different types of output for the events. The types of events still need to be defined by the plugins thus we need a way to pass information from the tool to the plugin to specify what type of information to be shown. Not only does the information need to be passed by the tool to plugin, but the plugin also requires a way to notify the tool of what options it can provide. This builds the plugin option infrastructure that is taken from trace-cmd that is used to allow plugins to produce different output based on the options specified by the tool. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Acked-by: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/20140603184154.0a4c031c@gandalf.local.home Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-07tools lib traceevent: Add flag to not load event pluginsSteven Rostedt (Red Hat)
Add a flag to pevent that will let the callers be able to set it and keep the system, and perhaps even normal plugins from being loaded. This is useful when plugins might hide certain information and seeing the raw events shows what may be going on. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Acked-by: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/20140603032223.678098063@goodmis.org Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-06perf: Differentiate exec() and non-exec() comm eventsAdrian Hunter
perf tools like 'perf report' can aggregate samples by comm strings, which generally works. However, there are other potential use-cases. For example, to pair up 'calls' with 'returns' accurately (from branch events like Intel BTS) it is necessary to identify whether the process has exec'd. Although a comm event is generated when an 'exec' happens it is also generated whenever the comm string is changed on a whim (e.g. by prctl PR_SET_NAME). This patch adds a flag to the comm event to differentiate one case from the other. In order to determine whether the kernel supports the new flag, a selection bit named 'exec' is added to struct perf_event_attr. The bit does nothing but will cause perf_event_open() to fail if the bit is set on kernels that do not have it defined. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/537D9EBE.7030806@intel.com Cc: Paul Mackerras <paulus@samba.org> Cc: Dave Jones <davej@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: linux-fsdevel@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-06Merge branch 'perf/urgent' into perf/core, to resolve conflict and to ↵Ingo Molnar
prepare for new patches Conflicts: arch/x86/kernel/traps.c Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-06perf: Fix perf_event_comm() vs. exec() assumptionPeter Zijlstra
perf_event_comm() assumes that set_task_comm() is only called on exec(), and in particular that its only called on current. Neither are true, as Dave reported a WARN triggered by set_task_comm() being called on !current. Separate the exec() hook from the comm hook. Reported-by: Dave Jones <davej@redhat.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: linux-fsdevel@vger.kernel.org Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/20140521153219.GH5226@laptop.programming.kicks-ass.net [ Build fix. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-05Merge branch 'uprobes/core' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc into perf/core Pull uprobes tmpfs support patches from Oleg Nesterov. Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-05uprobes/x86: Rename arch_uprobe->def to ->defparam, minor comment updatesOleg Nesterov
Purely cosmetic, no changes in .o, 1. As Jim pointed out arch_uprobe->def looks ambiguous, rename it to ->defparam. 2. Add the comment into default_post_xol_op() to explain "regs->sp +=". 3. Remove the stale part of the comment in arch_uprobe_analyze_insn(). Suggested-by: Jim Keniston <jkenisto@us.ibm.com> Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Signed-off-by: Oleg Nesterov <oleg@redhat.com>
2014-06-05perf/documentation: Add description for conditional branch filterAnshuman Khandual
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Reviewed-by: Stephane Eranian <eranian@google.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: mpe@ellerman.id.au Cc: benh@kernel.crashing.org Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/1400743210-32289-4-git-send-email-khandual@linux.vnet.ibm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-05perf/x86: Add conditional branch filtering supportAnshuman Khandual
This patch adds conditional branch filtering support, enabling it for PERF_SAMPLE_BRANCH_COND in perf branch stack sampling framework by utilizing an available software filter X86_BR_JCC. Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Reviewed-by: Stephane Eranian <eranian@google.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: mpe@ellerman.id.au Cc: benh@kernel.crashing.org Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/1400743210-32289-3-git-send-email-khandual@linux.vnet.ibm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-05perf/tool: Add conditional branch filter 'cond' to perf recordAnshuman Khandual
Adding perf record support for new branch stack filter criteria PERF_SAMPLE_BRANCH_COND. Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Reviewed-by: Stephane Eranian <eranian@google.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1400743210-32289-2-git-send-email-khandual@linux.vnet.ibm.com Cc: mpe@ellerman.id.au Cc: benh@kernel.crashing.org Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-05perf: Add new conditional branch filter 'PERF_SAMPLE_BRANCH_COND'Anshuman Khandual
This patch introduces new branch filter PERF_SAMPLE_BRANCH_COND which will extend the existing perf ABI. This will filter branches which are conditional. Various architectures can provide this functionality either with HW filtering support (if present) or with SW filtering of captured branch instructions. Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Reviewed-by: Stephane Eranian <eranian@google.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: mpe@ellerman.id.au Cc: benh@kernel.crashing.org Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/1400743210-32289-1-git-send-email-khandual@linux.vnet.ibm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-05uprobes: Teach copy_insn() to support tmpfsOleg Nesterov
tmpfs is widely used but as Denys reports shmem_aops doesn't have ->readpage() and thus you can't probe a binary on this filesystem. As Hugh suggested we can use shmem_read_mapping_page() in this case, just we need to check shmem_mapping() if ->readpage == NULL. Reported-by: Denys Vlasenko <dvlasenk@redhat.com> Suggested-by: Hugh Dickins <hughd@google.com> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/20140519184136.GB6750@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-05uprobes: Shift ->readpage check from __copy_insn() to uprobe_register()Oleg Nesterov
copy_insn() fails with -EIO if ->readpage == NULL, but this error is not propagated unless uprobe_register() path finds ->mm which already mmaps this file. In this case (say) "perf record" does not actually install the probe, but the user can't know about this. Move this check into uprobe_register() so that this problem can be detected earlier and reported to user. Note: this is still not perfect, - copy_insn() and arch_uprobe_analyze_insn() should be called by uprobe_register() but this is not simple, we need vm_file for read_mapping_page() (although perhaps we can pass NULL), and we need ->mm for is_64bit_mm() (although this logic is broken anyway). - uprobe_register() should be called by create_trace_uprobe(), not by probe_event_enable(), so that an error can be detected at "perf probe -x" time. This also needs more changes in the core uprobe code, uprobe register/unregister interface was poorly designed from the very beginning. Reported-by: Denys Vlasenko <dvlasenk@redhat.com> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Hugh Dickins <hughd@google.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/20140519184054.GA6750@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-05perf/x86: Use common PMU interrupt disabled codeVince Weaver
Make the x86 perf code use the new common PMU interrupt disabled code. Typically most x86 machines have working PMU interrupts, although some older p6-class machines had this problem. Signed-off-by: Vince Weaver <vincent.weaver@maine.edu> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1405161715560.11099@vincent-weaver-1.umelst.maine.edu Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-05perf/ARM: Use common PMU interrupt disabled codeVince Weaver
Make the ARM perf code use the new common PMU interrupt disabled code. This allows perf to work on ARM machines without a working PMU interrupt (for example, raspberry pi). Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Vince Weaver <vincent.weaver@maine.edu> [peterz: applied changes suggested by Will] Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Grant Likely <grant.likely@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Will Deacon <will.deacon@arm.com> Cc: devicetree@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1405161712190.11099@vincent-weaver-1.umelst.maine.edu [ Small readability tweaks to the code. ] Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-05perf: Disable sampled events if no PMU interruptVince Weaver
Add common code to generate -ENOTSUPP at event creation time if an architecture attempts to create a sampled event and PERF_PMU_NO_INTERRUPT is set. This adds a new pmu->capabilities flag. Initially we only support PERF_PMU_NO_INTERRUPT (to indicate a PMU has no support for generating hardware interrupts) but there are other capabilities that can be added later. Signed-off-by: Vince Weaver <vincent.weaver@maine.edu> Acked-by: Will Deacon <will.deacon@arm.com> [peterz: rename to PERF_PMU_CAP_* and moved the pmu::capabilities word into a hole] Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1405161708060.11099@vincent-weaver-1.umelst.maine.edu Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-05perf: Fix use after free in perf_remove_from_context()Peter Zijlstra
While that mutex should guard the elements, it doesn't guard against the use-after-free that's from list_for_each_entry_rcu(). __perf_event_exit_task() can actually free the event. And because list addition/deletion is guarded by both ctx->mutex and ctx->lock, holding ctx->mutex is sufficient for reading the list, so we don't actually need the rcu list iteration. Fixes: 3a497f48637e ("perf: Simplify perf_event_exit_task_context()") Reported-by: Sasha Levin <sasha.levin@oracle.com> Tested-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Dave Jones <davej@redhat.com> Cc: acme@ghostprotocols.net Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/20140529170024.GA2315@laptop.programming.kicks-ass.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-05Merge branch 'perf/kprobes' into perf/coreIngo Molnar
Conflicts: arch/x86/kernel/traps.c The kprobes enhancements are fully cooked, ship them upstream. Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-05Merge branch 'perf/uprobes' into perf/coreIngo Molnar
These bits from Oleg are fully cooked, ship them to Linus. Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-05Merge tag 'perf-core-for-mingo' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf into perf/core Pull perf/core improvements and fixes from Jiri Olsa: * Warn the user when trace command is not available (Arnaldo Carvalho de Melo) * Add warning when disabling perl scripting support due to missing devel files (Arnaldo Carvalho de Melo) * Consider header files outside perf directory in tags target (Sebastian Andrzej Siewior) * Allow overriding sysfs and proc finding with env var (Cody P Schafer) * Fix "==" into "=" in ui_browser__warning assignment (zhangdianfang) * Factor elide bool handling in sort code (Jiri Olsa) * Fix poll return value propagation (Jiri Olsa) * Fix 'make help' message error (Jianyu Zhan) Signed-off-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-05Merge tag 'perf-urgent-for-mingo' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf into perf/urgent Pull perf/urgent fixes from Jiri Olsa: * Fix perf probe to find correct variable DIE (Masami Hiramatsu) * Fix a segfault in perf probe if asked for variable it doesn't find (Masami Hiramatsu) Signed-off-by: Jiri Olsa <jolsa@kernel.org> Acked-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-04perf probe: Fix perf probe to find correct variable DIEMasami Hiramatsu
Fix perf probe to find correct variable DIE which has location or external instance by tracking down the lexical blocks. Current die_find_variable() expects that the all variable DIEs which has DW_TAG_variable have a location. However, since recent dwarf information may have declaration variable DIEs at the entry of function (subprogram), die_find_variable() returns it. To solve this problem, it must track down the DIE tree to find a DIE which has an actual location or a reference for external instance. e.g. finding a DIE which origin is <0xdc73>; <1><11496>: Abbrev Number: 95 (DW_TAG_subprogram) <11497> DW_AT_abstract_origin: <0xdc42> <1149b> DW_AT_low_pc : 0x1850 [...] <2><114cc>: Abbrev Number: 119 (DW_TAG_variable) <- this is a declaration <114cd> DW_AT_abstract_origin: <0xdc73> <2><114d1>: Abbrev Number: 119 (DW_TAG_variable) [...] <3><115a7>: Abbrev Number: 105 (DW_TAG_lexical_block) <115a8> DW_AT_ranges : 0xaa0 <4><115ac>: Abbrev Number: 96 (DW_TAG_variable) <- this has a location <115ad> DW_AT_abstract_origin: <0xdc73> <115b1> DW_AT_location : 0x486c (location list) Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Tested-by: Arnaldo Carvalho de Melo <acme@kernel.org> Acked-by: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/20140529121930.30879.87092.stgit@ltc230.yrl.intra.hitachi.co.jp Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-04perf probe: Fix a segfault if asked for variable it doesn't findMasami Hiramatsu
Fix a segfault bug by asking for variable it doesn't find. Since the convert_variable() didn't handle error code returned from convert_variable_location(), it just passed an incomplete variable field and then a segfault was occurred when formatting the field. This fixes that bug by handling success code correctly in convert_variable(). Other callers of convert_variable_location() are correctly checking the return code. This bug was introduced by following commit. But another hidden erroneous error handling has been there previously (-ENOMEM case). commit 3d918a12a1b3088ac16ff37fa52760639d6e2403 Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Reported-by: Arnaldo Carvalho de Melo <acme@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/20140529105232.28251.30447.stgit@ltc230.yrl.intra.hitachi.co.jp Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-03perf tools: Fix 'make help' message errorJianyu Zhan
Currently 'make help' message has such hint: use "make prefix=<path> <install target>" to install to a particular path like make prefix=/usr/local install install-doc But this is misleading, when I specify "prefix=/usr/local", it has got no respect at all. This is because that, "DESTDIR" is considered first. In this case, "DESTDIR" has an empty value, so "prefix" is honored. However, "prefix" is unconditionally assigned to $HOME, regardless of what it is set to from command line. So our "prefix" setting got no respect and the actual destination falls back to $HOME. This patch fixes this issue and corrects the help message. Signed-off-by: Jianyu Zhan <nasa4836@gmail.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/1401727474-19370-1-git-send-email-nasa4836@gmail.com Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-03perf record: Fix poll return value propagationJiri Olsa
If the perf record command is interrupted in record__mmap_read_all function, the 'done' is set and err has the latest poll return value, which is most likely positive number (= number of pollfds ready to read). This 'positive err' is then propagated to the exit code, resulting in not finishing the perf.data header properly, causing following error in report: # perf record -F 50000 -a --- make the system real busy, so there's more chance to interrupt perf in event writing code --- ^C[ perf record: Woken up 16 times to write data ] [ perf record: Captured and wrote 30.292 MB perf.data (~1323468 samples) ] # perf report --stdio > /dev/null WARNING: The perf.data file's data size field is 0 which is unexpected. Was the 'perf record' command properly terminated? Fixing this by checking for positive poll return value and setting err to 0. Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1401732126-19465-1-git-send-email-jolsa@kernel.org Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-03perf tools: Move elide bool into perf_hpp_fmt structJiri Olsa
After output/sort fields refactoring, it's expensive to check the elide bool in its current location inside the 'struct sort_entry'. The perf_hpp__should_skip function gets highly noticable in workloads with high number of output/sort fields, like for: $ perf report -i perf-test.data -F overhead,sample,period,comm,pid,dso,symbol,cpu --stdio Performance report: 9.70% perf [.] perf_hpp__should_skip Moving the elide bool into the 'struct perf_hpp_fmt', which makes the perf_hpp__should_skip just single struct read. Got speedup of around 22% for my test perf.data workload. The change should not harm any other workload types. Performance counter stats for (10 runs): before: 358,319,732,626 cycles ( +- 0.55% ) 467,129,581,515 instructions # 1.30 insns per cycle ( +- 0.00% ) 150.943975206 seconds time elapsed ( +- 0.62% ) now: 278,785,972,990 cycles ( +- 0.12% ) 370,146,797,640 instructions # 1.33 insns per cycle ( +- 0.00% ) 116.416670507 seconds time elapsed ( +- 0.31% ) Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/20140601142622.GA9131@krava.brq.redhat.com Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-03perf tools: Remove elide setup for SORT_MODE__MEMORY modeJiri Olsa
There's no need to setup elide of sort_dso sort entry again with symbol_conf.dso_list list. The only difference were list names of memory mode data, which does not make much sense to me. Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1400858147-7155-2-git-send-email-jolsa@kernel.org Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-03perf tools: Fix "==" into "=" in ui_browser__warning assignmentzhangdianfang
Convert "==" into "=" in ui_browser__warning assignment. Bug description: https://bugzilla.kernel.org/show_bug.cgi?id=76751 Reported-by: David Binderman <dcb314@hotmail.com> Signed-off-by: Dianfang Zhang <zhangdianfang@huawei.com> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jean Delvare <jdelvare@suse.de> Link: http://lkml.kernel.org/r/20140530154709.GC1202@kernel.org [ changed the changelog a bit ] Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-03perf tools: Allow overriding sysfs and proc finding with env varCody P Schafer
SYSFS_PATH and PROC_PATH environment variables now let the user override the detection of sysfs and proc locations for testing purposes. Signed-off-by: Cody P Schafer <dev@codyps.com> Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/1401236684-10579-2-git-send-email-dev@codyps.com Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-03perf tools: Consider header files outside perf directory in tags targetSebastian Andrzej Siewior
This fixes lookups like "vi -t event_format" Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Link: http://lkml.kernel.org/r/20140528081918.GA28567@linutronix.de Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-03perf tools: Add warning when disabling perl scripting support due to missing ↵Arnaldo Carvalho de Melo
devel files We were just showing "libperl: OFF", unlike other features where we present the user with a message helping have a feature built in. Fix it by adding the following message: config/Makefile:450: Missing perl devel files. Disabling perl scripting support, consider installing perl-ExtUtils-Embed Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-t7yeud34ehimlfi6pklb29p7@git.kernel.org Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-03perf trace: Warn the user when not availableArnaldo Carvalho de Melo
When the audit-libs devel package is not found at build time we disable the 'trace' command, as we are not able to map syscall numbers to strings, but then the message the user is presented is cryptic: [root@zoo linux]# trace ls perf: 'ls' is not a perf-command. See 'perf --help'. Fix it by presenting a more helpful message: [root@zoo linux]# trace l trace command not available: missing audit-libs devel package at build time. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-uxeunqetd0sgxyibusapen9a@git.kernel.org Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-03Merge tag 'perf-core-for-mingo' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf into perf/core Pull perf/core improvements and fixes from Jiri Olsa: * Add support to accumulate hist periods (Namhyung Kim) Signed-off-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-02uprobes: Teach copy_insn() to support tmpfsOleg Nesterov
tmpfs is widely used but as Denys reports shmem_aops doesn't have ->readpage() and thus you can't probe a binary on this filesystem. As Hugh suggested we can use shmem_read_mapping_page() in this case, just we need to check shmem_mapping() if ->readpage == NULL. Reported-by: Denys Vlasenko <dvlasenk@redhat.com> Suggested-by: Hugh Dickins <hughd@google.com> Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Signed-off-by: Oleg Nesterov <oleg@redhat.com>
2014-06-02uprobes: Shift ->readpage check from __copy_insn() to uprobe_register()Oleg Nesterov
copy_insn() fails with -EIO if ->readpage == NULL, but this error is not propagated unless uprobe_register() path finds ->mm which already mmaps this file. In this case (say) "perf record" does not actually install the probe, but the user can't know about this. Move this check into uprobe_register() so that this problem can be detected earlier and reported to user. Note: this is still not perfect, - copy_insn() and arch_uprobe_analyze_insn() should be called by uprobe_register() but this is not simple, we need vm_file for read_mapping_page() (although perhaps we can pass NULL), and we need ->mm for is_64bit_mm() (although this logic is broken anyway). - uprobe_register() should be called by create_trace_uprobe(), not by probe_event_enable(), so that an error can be detected at "perf probe -x" time. This also needs more changes in the core uprobe code, uprobe register/unregister interface was poorly designed from the very beginning. Reported-by: Denys Vlasenko <dvlasenk@redhat.com> Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Signed-off-by: Oleg Nesterov <oleg@redhat.com>
2014-06-01Linux 3.15-rc8Linus Torvalds
2014-06-01Merge branch 'merge' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc Pull powerpc fix from Ben Herrenschmidt: "Here's just one trivial patch to wire up sys_renameat2 which I seem to have completely missed so far. (My test build scripts fwd me warnings but miss the ones generated for missing syscalls)" * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: powerpc: Wire renameat2() syscall
2014-06-01Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds
Pull MIPS fixes from Ralf Baechle: "A fair number of fixes across the field. Nothing terribly complicated; the one liners in below changelog should be fairly descriptive. Noteworthy is the SB1 change which the result of changes to binutils resulting in one big gas warning for most files being assembled as well as the asid_cache and branch emulation fixes which fix corruption or possible uninteded behaviour of kernel or application code. The remainder of fixes are more platforms or subsystem specific" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: MIPS: R46000: Fix Micro-assembler field overflow for R4600 V2 MIPS: ptrace: Avoid smp_processor_id() in preemptible code MIPS: Lemote 2F: cs5536: mfgpt: use raw locks MIPS: SB1: Fix excessive kernel warnings. MIPS: RC32434: fix broken PCI resource initialization MIPS: malta: memory.c: Initialize the 'memsize' variable MIPS: Fix typo when reporting cache and ftlb errors for ImgTec cores MIPS: Fix inconsistancy of __NR_Linux_syscalls value MIPS: Fix branch emulation of branch likely instructions. MIPS: Fix a typo error in AUDIT_ARCH definition MIPS: Change type of asid_cache to unsigned long
2014-06-01Merge branch 'sched-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler fixes from Ingo Molnar: "Various fixlets, mostly related to the (root-only) SCHED_DEADLINE policy, but also a hotplug bug fix and a fix for a NR_CPUS related overallocation bug causing a suspend/resume regression" * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched: Fix hotplug vs. set_cpus_allowed_ptr() sched/cpupri: Replace NR_CPUS arrays sched/deadline: Replace NR_CPUS arrays sched/deadline: Restrict user params max value to 2^63 ns sched/deadline: Change sched_getparam() behaviour vs SCHED_DEADLINE sched: Disallow sched_attr::sched_policy < 0 sched: Make sched_setattr() correctly return -EFBIG
2014-06-02powerpc: Wire renameat2() syscallBenjamin Herrenschmidt
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-06-01perf tests: Add a test case for cumulating callchainsNamhyung Kim
Now it adds a new testcase to verify --children option working correctly. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Arun Sharma <asharma@fb.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Link: http://lkml.kernel.org/r/1401335910-16832-28-git-send-email-namhyung@kernel.org Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-01perf tests: Define and use symbolic names for fake symbolsNamhyung Kim
In various histogram test cases, fake symbols are used as raw numbers. Define macros for each pid, map, symbols so that it can increase readability somewhat. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Arun Sharma <asharma@fb.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Link: http://lkml.kernel.org/r/1401335910-16832-27-git-send-email-namhyung@kernel.org Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-01perf tools: Reset output/sort order to defaultNamhyung Kim
When reset_output_field() is called, also reset field/sort order to NULL so that it can have the default values. It's needed for testing. Signed-off-by: Namhyung Kim <namhyung@kernel.org> CC: Arun Sharma <asharma@fb.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Link: http://lkml.kernel.org/r/1401335910-16832-26-git-send-email-namhyung@kernel.org Signed-off-by: Jiri Olsa <jolsa@kernel.org>
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