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2016-12-15perf sched timehist: Show callchains for idle statNamhyung Kim
When --idle-hist option is used with --summary, it now shows idle stats with callchains like below: Idle stats by callchain: CPU 0: 902.195 msec Idle time (msec) Count Callchains ---------------- ------- -------------------------------------------------- 370.589 69 futex_wait_queue_me <- futex_wait <- do_futex <- sys_futex <- entry_SYSCALL_64_fastpath 178.799 17 worker_thread <- kthread <- ret_from_fork 128.352 17 schedule_timeout <- rcu_gp_kthread <- kthread <- ret_from_fork 125.111 19 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- poll_schedule_timeout <- do_select <- core_sys_select 71.599 50 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- poll_schedule_timeout <- do_sys_poll <- sys_poll 23.146 1 rcu_gp_kthread <- kthread <- ret_from_fork 4.510 1 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- ep_poll <- sys_epoll_wait <- do_syscall_64 0.085 1 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- poll_schedule_timeout <- do_sys_poll <- do_restart_poll ... Committer notes: Extra testing: # uname -a Linux jouet 4.8.8-300.fc25.x86_64 #1 SMP Tue Nov 15 18:10:06 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux 1) Run 'perf sched record -g' 2) Run 'perf sched timehist --idle --summary' <SNIP> Idle stats by callchain: CPU 0: 13456.840 msec Idle time (msec) Count Callchains ---------------- ----- -------------------------------------------------- 5386.637 3283 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- poll_schedule_timeout <- do_sys_poll <- sys_poll 2750.238 2299 futex_wait_queue_me <- futex_wait <- do_futex <- sys_futex <- do_syscall_64 1275.672 1287 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- ep_poll <- sys_epoll_wait <- entry_SYSCALL_64_fastpath 936.322 452 worker_thread <- kthread <- ret_from_fork 741.311 385 rcu_nocb_kthread <- kthread <- ret_from_fork 729.385 248 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- poll_schedule_timeout <- do_sys_poll <- sys_ppoll 365.386 229 irq_thread <- kthread <- ret_from_fork 338.934 265 futex_wait_queue_me <- futex_wait <- do_futex <- sys_futex <- entry_SYSCALL_64_fastpath 219.488 201 schedule_timeout <- rcu_gp_kthread <- kthread <- ret_from_fork 186.839 410 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- ep_poll <- sys_epoll_wait <- do_syscall_64 142.541 59 kvm_vcpu_block <- kvm_arch_vcpu_ioctl_run <- kvm_vcpu_ioctl <- do_vfs_ioctl <- sys_ioctl 83.887 92 smpboot_thread_fn <- kthread <- ret_from_fork 62.722 96 do_exit <- do_group_exit <- 0x2a5594 <- entry_SYSCALL_64_fastpath 47.894 83 pipe_wait <- pipe_read <- __vfs_read <- vfs_read <- sys_read 46.554 61 rcu_gp_kthread <- kthread <- ret_from_fork 34.337 21 schedule_timeout <- intel_fbc_work_fn <- process_one_work <- worker_thread <- kthread 29.521 14 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- poll_schedule_timeout <- do_select <- core_sys_select 20.274 10 schedule_timeout <- io_schedule_timeout <- bit_wait_io <- __wait_on_bit <- out_of_line_wait_on_bit 15.085 55 schedule_timeout <- unix_stream_read_generic <- unix_stream_recvmsg <- sock_recvmsg <- SYSC_recvfrom <SNIP> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: David Ahern <dsahern@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20161208144755.16673-7-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-15perf sched timehist: Add -I/--idle-hist optionNamhyung Kim
The --idle-hist option is to analyze system idle state so which process makes cpu to go idle. If this option is specified, non-idle events will be skipped and processes switching to/from idle will be shown. This option is mostly useful when used with --summary(-only) option. In the idle-time summary view, idle time is accounted to previous thread which is run before idle task. The example output looks like following: Idle-time summary comm parent sched-out idle-time min-idle avg-idle max-idle stddev migrations (count) (msec) (msec) (msec) (msec) % -------------------------------------------------------------------------------------------- rcu_preempt[7] 2 95 550.872 0.011 5.798 23.146 7.63 0 migration/1[16] 2 1 15.558 15.558 15.558 15.558 0.00 0 khugepaged[39] 2 1 3.062 3.062 3.062 3.062 0.00 0 kworker/0:1H[124] 2 2 4.728 0.611 2.364 4.116 74.12 0 systemd-journal[167] 1 1 4.510 4.510 4.510 4.510 0.00 0 kworker/u16:3[558] 2 13 74.737 0.080 5.749 12.960 21.96 0 irq/34-iwlwifi[628] 2 21 118.403 0.032 5.638 23.990 24.00 0 kworker/u17:0[673] 2 1 3.523 3.523 3.523 3.523 0.00 0 dbus-daemon[722] 1 1 6.743 6.743 6.743 6.743 0.00 0 ifplugd[741] 1 1 58.826 58.826 58.826 58.826 0.00 0 wpa_supplicant[1490] 1 1 13.302 13.302 13.302 13.302 0.00 0 wpa_actiond[1492] 1 2 4.064 0.168 2.032 3.896 91.72 0 dockerd[1500] 1 1 0.055 0.055 0.055 0.055 0.00 0 ... Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: David Ahern <dsahern@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20161208144755.16673-6-namhyung@kernel.org Link: http://lkml.kernel.org/r/20161213080632.19099-2-namhyung@kernel.org [ Merged fix sent by Namhyumg, as posted in the second Link: tag ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-15perf sched timehist: Skip non-idle events when necessaryNamhyung Kim
Sometimes it only focuses on idle-related events like upcoming idle-hist feature. In this case we don't want to see other event to reduce noise. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: David Ahern <dsahern@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20161208144755.16673-5-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-15perf sched timehist: Save callchain when entering idleNamhyung Kim
In order to investigate the idleness reason, it is necessary to keep the callchains when entering idle. This can be identified by the sched:sched_switch event having the next_pid field as 0. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: David Ahern <dsahern@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20161208144755.16673-4-namhyung@kernel.org Link: http://lkml.kernel.org/r/20161213080632.19099-1-namhyung@kernel.org [ Merged fix from Namhyung, see second Link: tag ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-15perf sched timehist: Introduce struct idle_time_dataNamhyung Kim
The struct idle_time_data is to keep idle stats with callchains entering to the idle task. The normal thread_runtime calculation is done transparently since it extends the struct thread_runtime. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: David Ahern <dsahern@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20161208144755.16673-3-namhyung@kernel.org [ Align struct field names ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-15perf sched timehist: Split is_idle_sample()Namhyung Kim
The is_idle_sample() function actually does more than determining whether sample come from idle task. Split the callchain part into save_task_callchain() to make it clearer. Also checking prev_pid from trace data looks preferred than just checking sample->pid since it's possible, although rare, to have invalid 0 pid/tid on scheduling an exiting task. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: David Ahern <dsahern@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20161208144755.16673-2-namhyung@kernel.org [ Remove some needless () in some return statements ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-15perf tools: Move headers check into bash scriptJiri Olsa
To make it nicer and easily maintainable. Also moving the check into fixdep sub make, so its output is not scattered around the build output. Removing extra $$ from mman*.h checks. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1481030331-31944-5-git-send-email-jolsa@kernel.org [ Use /bin/sh, and 'function check() {' -> 'check () {' to make it work with busybox, in Alpine Linux, for instance ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-12Merge tag 'docs-4.10' of git://git.lwn.net/linuxLinus Torvalds
Pull documentation update from Jonathan Corbet: "These are the documentation changes for 4.10. It's another busy cycle for the docs tree, as the sphinx conversion continues. Highlights include: - Further work on PDF output, which remains a bit of a pain but should be more solid now. - Five more DocBook template files converted to Sphinx. Only 27 to go... Lots of plain-text files have also been converted and integrated. - Images in binary formats have been replaced with more source-friendly versions. - Various bits of organizational work, including the renaming of various files discussed at the kernel summit. - New documentation for the device_link mechanism. ... and, of course, lots of typo fixes and small updates" * tag 'docs-4.10' of git://git.lwn.net/linux: (193 commits) dma-buf: Extract dma-buf.rst Update Documentation/00-INDEX docs: 00-INDEX: document directories/files with no docs docs: 00-INDEX: remove non-existing entries docs: 00-INDEX: add missing entries for documentation files/dirs docs: 00-INDEX: consolidate process/ and admin-guide/ description scripts: add a script to check if Documentation/00-INDEX is sane Docs: change sh -> awk in REPORTING-BUGS Documentation/core-api/device_link: Add initial documentation core-api: remove an unexpected unident ppc/idle: Add documentation for powersave=off Doc: Correct typo, "Introdution" => "Introduction" Documentation/atomic_ops.txt: convert to ReST markup Documentation/local_ops.txt: convert to ReST markup Documentation/assoc_array.txt: convert to ReST markup docs-rst: parse-headers.pl: cleanup the documentation docs-rst: fix media cleandocs target docs-rst: media/Makefile: reorganize the rules docs-rst: media: build SVG from graphviz files docs-rst: replace bayer.png by a SVG image ...
2016-12-12Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge updates from Andrew Morton: - various misc bits - most of MM (quite a lot of MM material is awaiting the merge of linux-next dependencies) - kasan - printk updates - procfs updates - MAINTAINERS - /lib updates - checkpatch updates * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (123 commits) init: reduce rootwait polling interval time to 5ms binfmt_elf: use vmalloc() for allocation of vma_filesz checkpatch: don't emit unified-diff error for rename-only patches checkpatch: don't check c99 types like uint8_t under tools checkpatch: avoid multiple line dereferences checkpatch: don't check .pl files, improve absolute path commit log test scripts/checkpatch.pl: fix spelling checkpatch: don't try to get maintained status when --no-tree is given lib/ida: document locking requirements a bit better lib/rbtree.c: fix typo in comment of ____rb_erase_color lib/Kconfig.debug: make CONFIG_STRICT_DEVMEM depend on CONFIG_DEVMEM MAINTAINERS: add drm and drm/i915 irc channels MAINTAINERS: add "C:" for URI for chat where developers hang out MAINTAINERS: add drm and drm/i915 bug filing info MAINTAINERS: add "B:" for URI where to file bugs get_maintainer: look for arbitrary letter prefixes in sections printk: add Kconfig option to set default console loglevel printk/sound: handle more message headers printk/btrfs: handle more message headers printk/kdb: handle more message headers ...
2016-12-12Merge branch 'timers-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer updates from Thomas Gleixner: "The time/timekeeping/timer folks deliver with this update: - Fix a reintroduced signed/unsigned issue and cleanup the whole signed/unsigned mess in the timekeeping core so this wont happen accidentaly again. - Add a new trace clock based on boot time - Prevent injection of random sleep times when PM tracing abuses the RTC for storage - Make posix timers configurable for real tiny systems - Add tracepoints for the alarm timer subsystem so timer based suspend wakeups can be instrumented - The usual pile of fixes and updates to core and drivers" * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits) timekeeping: Use mul_u64_u32_shr() instead of open coding it timekeeping: Get rid of pointless typecasts timekeeping: Make the conversion call chain consistently unsigned timekeeping_Force_unsigned_clocksource_to_nanoseconds_conversion alarmtimer: Add tracepoints for alarm timers trace: Update documentation for mono, mono_raw and boot clock trace: Add an option for boot clock as trace clock timekeeping: Add a fast and NMI safe boot clock timekeeping/clocksource_cyc2ns: Document intended range limitation timekeeping: Ignore the bogus sleep time if pm_trace is enabled selftests/timers: Fix spelling mistake "Asyncrhonous" -> "Asynchronous" clocksource/drivers/bcm2835_timer: Unmap region obtained by of_iomap clocksource/drivers/arm_arch_timer: Map frame with of_io_request_and_map() arm64: dts: rockchip: Arch counter doesn't tick in system suspend clocksource/drivers/arm_arch_timer: Don't assume clock runs in suspend posix-timers: Make them configurable posix_cpu_timers: Move the add_device_randomness() call to a proper place timer: Move sys_alarm from timer.c to itimer.c ptp_clock: Allow for it to be optional Kconfig: Regenerate *.c_shipped files after previous changes ...
2016-12-12lib: radix-tree: check accounting of existing slot replacement usersJohannes Weiner
The bug in khugepaged fixed earlier in this series shows that radix tree slot replacement is fragile; and it will become more so when not only NULL<->!NULL transitions need to be caught but transitions from and to exceptional entries as well. We need checks. Re-implement radix_tree_replace_slot() on top of the sanity-checked __radix_tree_replace(). This requires existing callers to also pass the radix tree root, but it'll warn us when somebody replaces slots with contents that need proper accounting (transitions between NULL entries, real entries, exceptional entries) and where a replacement through the slot pointer would corrupt the radix tree node counts. Link: http://lkml.kernel.org/r/20161117193021.GB23430@cmpxchg.org Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Suggested-by: Jan Kara <jack@suse.cz> Reviewed-by: Jan Kara <jack@suse.cz> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Hugh Dickins <hughd@google.com> Cc: Matthew Wilcox <mawilcox@linuxonhyperv.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-12-12Merge branch 'x86-fpu-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 FPU updates from Ingo Molnar: "The main changes in this cycle were: - do a large round of simplifications after all CPUs do 'eager' FPU context switching in v4.9: remove CR0 twiddling, remove leftover eager/lazy bts, etc (Andy Lutomirski) - more FPU code simplifications: remove struct fpu::counter, clarify nomenclature, remove unnecessary arguments/functions and better structure the code (Rik van Riel)" * 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/fpu: Remove clts() x86/fpu: Remove stts() x86/fpu: Handle #NM without FPU emulation as an error x86/fpu, lguest: Remove CR0.TS support x86/fpu, kvm: Remove host CR0.TS manipulation x86/fpu: Remove irq_ts_save() and irq_ts_restore() x86/fpu: Stop saving and restoring CR0.TS in fpu__init_check_bugs() x86/fpu: Get rid of two redundant clts() calls x86/fpu: Finish excising 'eagerfpu' x86/fpu: Split old_fpu & new_fpu handling into separate functions x86/fpu: Remove 'cpu' argument from __cpu_invalidate_fpregs_state() x86/fpu: Split old & new FPU code paths x86/fpu: Remove __fpregs_(de)activate() x86/fpu: Rename lazy restore functions to "register state valid" x86/fpu, kvm: Remove KVM vcpu->fpu_counter x86/fpu: Remove struct fpu::counter x86/fpu: Remove use_eager_fpu() x86/fpu: Remove the XFEATURE_MASK_EAGER/LAZY distinction x86/fpu: Hard-disable lazy FPU mode x86/crypto, x86/fpu: Remove X86_FEATURE_EAGER_FPU #ifdef from the crc32c code
2016-12-12Merge branch 'x86-asm-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 asm updates from Ingo Molnar: "The main changes in this development cycle were: - a large number of call stack dumping/printing improvements: higher robustness, better cross-context dumping, improved output, etc. (Josh Poimboeuf) - vDSO getcpu() performance improvement for future Intel CPUs with the RDPID instruction (Andy Lutomirski) - add two new Intel AVX512 features and the CPUID support infrastructure for it: AVX512IFMA and AVX512VBMI. (Gayatri Kammela, He Chen) - more copy-user unification (Borislav Petkov) - entry code assembly macro simplifications (Alexander Kuleshov) - vDSO C/R support improvements (Dmitry Safonov) - misc fixes and cleanups (Borislav Petkov, Paul Bolle)" * 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (40 commits) scripts/decode_stacktrace.sh: Fix address line detection on x86 x86/boot/64: Use defines for page size x86/dumpstack: Make stack name tags more comprehensible selftests/x86: Add test_vdso to test getcpu() x86/vdso: Use RDPID in preference to LSL when available x86/dumpstack: Handle NULL stack pointer in show_trace_log_lvl() x86/cpufeatures: Enable new AVX512 cpu features x86/cpuid: Provide get_scattered_cpuid_leaf() x86/cpuid: Cleanup cpuid_regs definitions x86/copy_user: Unify the code by removing the 64-bit asm _copy_*_user() variants x86/unwind: Ensure stack grows down x86/vdso: Set vDSO pointer only after success x86/prctl/uapi: Remove #ifdef for CHECKPOINT_RESTORE x86/unwind: Detect bad stack return address x86/dumpstack: Warn on stack recursion x86/unwind: Warn on bad frame pointer x86/decoder: Use stderr if insn sanity test fails x86/decoder: Use stdout if insn decoder test is successful mm/page_alloc: Remove kernel address exposure in free_reserved_area() x86/dumpstack: Remove raw stack dump ...
2016-12-12Merge branch 'perf-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf updates from Ingo Molnar: "This update is pretty big and almost exclusively includes tooling changes, because v4.9's LTS status forced to completion most of the pending kernel side hardware enablement work and because we tried to freeze core perf work a bit to give a time window for the fuzzing efforts. The diff is large mostly due to the JSON hardware event tables added for Intel and Power8 CPUs. This was a popular feature request from people working close to hardware and from the HPC community. Tree size is big because this added the CPU event tables for over a decade of Intel CPUs. Future changes for a CPU vendor alrady support should be much smaller, as events for new models are added. The new events are listed in 'perf list', for the CPU model the tool is running on. If you find an interesting event it can be used as-is: $ perf stat -a -e l2_lines_out.pf_clean sleep 1 Performance counter stats for 'system wide': 7,860,403 l2_lines_out.pf_clean 1.000624918 seconds time elapsed The event lists can be searched the usual 'perf list' fashion for (case insensitive) substrings as well: $ perf list l2_lines_out List of pre-defined events (to be used in -e): cache: l2_lines_out.demand_clean [Clean L2 cache lines evicted by demand] l2_lines_out.demand_dirty [Dirty L2 cache lines evicted by demand] l2_lines_out.dirty_all [Dirty L2 cache lines filling the L2] l2_lines_out.pf_clean [Clean L2 cache lines evicted by L2 prefetch] l2_lines_out.pf_dirty [Dirty L2 cache lines evicted by L2 prefetch] etc. There's a few high level categories as well that can be listed: 'cache', 'floating point', 'frontend', 'memory', 'pipeline', 'virtual memory'. Existing generic events and workflows should work as-is. The only kernel side change is a late breaking fix for an older regression, related to Intel BTS, LBR and PT feature interaction. On the tooling side there are three new tools / major features: - The new 'perf c2c' tool provides means for Shared Data C2C/HITM analysis. This allows you to track down cacheline contention. The tool is based on x86's load latency and precise store facility events provided by Intel CPUs. It was tested by Joe Mario and has proven to be useful, finding some cacheline contentions. Joe also wrote a blog about c2c tool with examples: https://joemario.github.io/blog/2016/09/01/c2c-blog/ excerpt of the content on this site: At a high level, “perf c2c” will show you: * The cachelines where false sharing was detected. * The readers and writers to those cachelines, and the offsets where those accesses occurred. * The pid, tid, instruction addr, function name, binary object name for those readers and writers. * The source file and line number for each reader and writer. * The average load latency for the loads to those cachelines. * Which numa nodes the samples a cacheline came from and which CPUs were involved. Using perf c2c is similar to using the Linux perf tool today. First collect data with “perf c2c record”, then generate a report output with “perf c2c report” There one finds extensive details on using the tool, with tips on reducing the volume of samples while still capturing enough to do its job. (Dick Fowles, Joe Mario, Don Zickus, Jiri Olsa) - The new 'perf sched timehist' tool provides tailored analysis of scheduling events. Example usage: perf sched record -- sleep 1 perf sched timehist By default it shows the individual schedule events, including the wait time (time between sched-out and next sched-in events for the task), the task scheduling delay (time between wakeup and actually running) and run time for the task: time cpu task name wait time sch delay run time [tid/pid] (msec) (msec) (msec) -------- ------ ---------------- --------- --------- -------- 1.874569 [0011] gcc[31949] 0.014 0.000 1.148 1.874591 [0010] gcc[31951] 0.000 0.000 0.024 1.874603 [0010] migration/10[59] 3.350 0.004 0.011 1.874604 [0011] <idle> 1.148 0.000 0.035 1.874723 [0005] <idle> 0.016 0.000 1.383 1.874746 [0005] gcc[31949] 0.153 0.078 0.022 ... Times are in msec.usec. (David Ahern, Namhyung Kim) - Add CPU vendor hardware event tables: Add JSON files with vendor event naming for Intel and Power8 processors, allowing users of tools like oprofile to keep using the event names they are used to, as well as people reading vendor documentation, where such naming is used. (Andi Kleen, Sukadev Bhattiprolu) You should see all the new events with 'perf list' and you should be able to search them, for example 'perf list miss' will list all the myriads of miss events. Other tooling features added were: - Cross-arch annotation support: o Improve ARM support in the annotation code, affecting 'perf annotate', 'perf report' and live annotation in 'perf top' (Kim Phillips) o Initial support for PowerPC in the annotation code (Ravi Bangoria) o Support AArch64 in the 'annotate' code, native/local and cross-arch/remote (Kim Phillips) - Allow considering just events in a given time interval, via the '--time start.s.ms,end.s.ms' command line, added to 'perf kmem', 'perf report', 'perf sched timehist' and 'perf script' (David Ahern) - Add option to stop printing a callchain at one of a given group of symbol names (David Ahern) - Track memory freed in 'perf kmem stat' (David Ahern) - Allow querying and setting .perfconfig variables (Taeung Song) - Show branch information in callchains (predicted, TSX aborts, loop iteractions, etc) (Jin Yao) - Dynamicly change verbosity level by pressing 'V' in the 'perf top/report' hists TUI browser (Alexis Berlemont) - Implement 'perf trace --delay' in the same fashion as in 'perf record --delay', to skip sampling workload initialization events (Alexis Berlemont) - Make vendor named events case insensitive in 'perf list', i.e. 'perf list LONGEST_LAT' works just the same as 'perf list longest_lat' (Andi Kleen) - Add unwinding support for jitdump (Stefano Sanfilippo) Tooling infrastructure changes: - Support linking perf with clang and LLVM libraries, initially statically, but this limitation will be lifted and shared libraries, when available, will be preferred to the static build, that should, as with other features, be enabled explicitly (Wang Nan) - Add initial support (and perf test entry) for tooling hooks, starting with 'record_start' and 'record_end', that will have as its initial user the eBPF infrastructure, where perf_ prefixed functions will be JITed and run when such hooks are called (Wang Nan) - Implement assorted libbpf improvements (Wang Nan)" ... and lots of other changes, features, cleanups and refactorings I did not list, see the shortlog and the git log for details" * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (220 commits) perf/x86: Fix exclusion of BTS and LBR for Goldmont perf tools: Explicitly document that --children is enabled by default perf sched timehist: Cleanup idle_max_cpu handling perf sched timehist: Handle zero sample->tid properly perf callchain: Introduce callchain_cursor__copy() perf sched: Cleanup option processing perf sched timehist: Improve error message when analyzing wrong file perf tools: Move perf build related variables under non fixdep leg perf tools: Force fixdep compilation at the start of the build perf tools: Move PERF-VERSION-FILE target into rules area perf build: Check LLVM version in feature check perf annotate: Show raw form for jump instruction with indirect target perf tools: Add non config targets perf tools: Cleanup build directory before each test perf tools: Move python/perf.so target into rules area perf tools: Move install-gtk target into rules area tools build: Move tabs to spaces where suitable tools build: Make the .cmd file more readable perf clang: Compile BPF script using builtin clang support perf clang: Support compile IR to BPF object and add testcase ...
2016-12-12Merge branch 'core-rcu-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull RCU updates from Ingo Molnar: "The main RCU changes in this development cycle were: - Miscellaneous fixes, including a change to call_rcu()'s rcu_head alignment check. - Security-motivated list consistency checks, which are disabled by default behind DEBUG_LIST. - Torture-test updates. - Documentation updates, yet again just simple changes" * 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: torture: Prevent jitter from delaying build-only runs torture: Remove obsolete files from rcutorture .gitignore rcu: Don't kick unless grace period or request rcu: Make expedited grace periods recheck dyntick idle state torture: Trace long read-side delays rcu: RCU_TRACE enables event tracing as well as debugfs rcu: Remove obsolete comment from __call_rcu() rcu: Remove obsolete rcu_check_callbacks() header comment rcu: Tighten up __call_rcu() rcu_head alignment check Documentation/RCU: Fix minor typo documentation: Present updated RCU guarantee bug: Avoid Kconfig warning for BUG_ON_DATA_CORRUPTION lib/Kconfig.debug: Fix typo in select statement lkdtm: Add tests for struct list corruption bug: Provide toggle for BUG on data corruption list: Split list_del() debug checking into separate function rculist: Consolidate DEBUG_LIST for list_add_rcu() list: Split list_add() debug checking into separate function
2016-12-11Merge branch 'linus' into perf/core, to pick up fixesIngo Molnar
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-12-10Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
2016-12-09Merge branch 'libnvdimm-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm Pull libnvdimm fixes from Dan Williams: "Several fixes to the DSM (ACPI device specific method) marshaling implementation. I consider these urgent enough to send for 4.9 consideration since they fix the kernel's handling of ARS (Address Range Scrub) commands. Especially for platforms without machine-check-recovery capabilities, successful execution of ARS commands enables the platform to potentially break out of an infinite reboot problem if a media error is present in the boot path. There is also a one line fix for a device-dax read-only mapping regression. Commits 9a901f5495e2 ("acpi, nfit: fix extended status translations for ACPI DSMs") and 325896ffdf90 ("device-dax: fix private mapping restriction, permit read-only") are true regression fixes for changes introduced this cycle. Commit efda1b5d87cb ("acpi, nfit, libnvdimm: fix / harden ars_status output length handling") fixes the kernel's handling of zero-length results, this never would have worked in the past, but we only just recently discovered a BIOS implementation that emits this arguably spec non-compliant result. The remaining two commits are additional fall out from thinking through the implications of a zero / truncated length result of the ARS Status command. In order to mitigate the risk that these changes introduce yet more regressions they are backstopped by a new unit test in commit a7de92dac9f0 ("tools/testing/nvdimm: unit test acpi_nfit_ctl()") that mocks up inputs to acpi_nfit_ctl()" * 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: device-dax: fix private mapping restriction, permit read-only tools/testing/nvdimm: unit test acpi_nfit_ctl() acpi, nfit: fix bus vs dimm confusion in xlat_status acpi, nfit: validate ars_status output buffer size acpi, nfit, libnvdimm: fix / harden ars_status output length handling acpi, nfit: fix extended status translations for ACPI DSMs
2016-12-09Revert "radix tree test suite: fix compilation"Linus Torvalds
This reverts commit 53855d10f4567a0577360b6448d52a863929775b. It shouldn't have come in yet - it depends on the changes in linux-next that will come in during the next merge window. As Matthew Wilcox says, the test suite is broken with the current state without the revert. Requested-by: Matthew Wilcox <mawilcox@microsoft.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-12-07radix tree test suite: fix compilationMatthew Wilcox
Patch "lib/radix-tree: Convert to hotplug state machine" breaks the test suite as it adds a call to cpuhp_setup_state_nocalls() which is not currently emulated in the test suite. Add it, and delete the emulation of the old CPU hotplug mechanism. Link: http://lkml.kernel.org/r/1480369871-5271-36-git-send-email-mawilcox@linuxonhyperv.com Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com> Tested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Matthew Wilcox <mawilcox@microsoft.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-12-07perf tools: Explicitly document that --children is enabled by defaultYannick Brosseau
The fact that the --children option is enabled by default is buried deep at the end of the help page, in the overhead calculation section. This make it explicit right where the option is listed, following the same way other default options are described Signed-off-by: Yannick Brosseau <scientist@fb.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: kernel-team@fb.com Link: http://lkml.kernel.org/r/20161202160732.29058-1-scientist@fb.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-07perf sched timehist: Cleanup idle_max_cpu handlingNamhyung Kim
It treats the idle_max_cpu little bit confusingly IMHO. Let's make it more straight forward. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: David Ahern <dsahern@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20161206034010.6499-6-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-07perf sched timehist: Handle zero sample->tid properlyNamhyung Kim
Sometimes samples have tid of 0 but non-0 pid. It ends up having a new thread of 0 tid/pid (instead of referring idle task) since tid is used to search matching task. But I guess it's wrong to use 0 as a tid when pid is set. This patch uses tid only if it has a non-zero value or same as pid (of 0). Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20161206034010.6499-4-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-07perf callchain: Introduce callchain_cursor__copy()Namhyung Kim
The callchain_cursor__copy() function is to save current callchain captured by a cursor. It'll be used to keep callchains when switching to idle task for each cpu. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20161206034010.6499-3-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-07perf sched: Cleanup option processingNamhyung Kim
The -D/--dump-raw-trace option is in the parent option so no need to repeat it. Also move -f/--force option to parent as it's common to handle data file. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: David Ahern <dsahern@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20161206034010.6499-2-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-07perf sched timehist: Improve error message when analyzing wrong fileDavid Ahern
Arnaldo reported an unhelpful error message when running perf sched timehist on a file that did not contain sched tracepoints: [root@jouet ~]# perf sched timehist No trace sample to read. Did you call 'perf record -R'? [root@jouet ~]# perf evlist -v cycles:ppp: size: 112, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|CALLCHAIN|CPU|PERIOD, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, task: 1, precise_ip: 3, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1 Change the has_traces check to look for the sched_switch event. Analysis for perf sched timehist requires at least this event. Now when analyzing a file without sched tracepoints you get: root@f21-vbox:/tmp$ perf sched timehist No sched_switch events found. Have you run 'perf sched record'? Signed-off-by: David Ahern <dsahern@gmail.com> Reported-and-Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1480451988-43673-1-git-send-email-dsahern@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-06tools/testing/nvdimm: unit test acpi_nfit_ctl()Dan Williams
A recent flurry of bug discoveries in the nfit driver's DSM marshalling routine has highlighted the fact that we do not have unit test coverage for this routine. Add a self-test of acpi_nfit_ctl() routine before probing the "nfit_test.0" device. This mocks stimulus to acpi_nfit_ctl() and if any of the tests fail "nfit_test.0" will be unavailable causing the rest of the tests to not run / fail. This unit test will also be a place to land reproductions of quirky BIOS behavior discovered in the field and ensure the kernel does not regress against implementations it has seen in practice. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-12-06perf tools: Move perf build related variables under non fixdep legJiri Olsa
Because there's no need for them in fixdep build. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1481030331-31944-4-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-06perf tools: Force fixdep compilation at the start of the buildJiri Olsa
The fixdep tool needs to be built before everything else, because it fixes every object dependency file. We handle this currently by making all objects to depend on fixdep, which is error prone and is easily forgotten when new object is added. Instead of this, this patch force fixdep tool to be built as the first target in the separate make session. This way we don't need to handle extra fixdep dependencies and we are certain there's no fixdep race with any parallel make job. Committer notes: Testing it: Before: $ rm -rf /tmp/build/perf/ ; mkdir -p /tmp/build/perf ; make -k O=/tmp/build/perf -C tools/perf install-bin make: Entering directory '/home/acme/git/linux/tools/perf' BUILD: Doing 'make -j4' parallel build Auto-detecting system features: ... dwarf: [ on ] ... dwarf_getlocations: [ on ] ... glibc: [ on ] ... gtk2: [ on ] ... libaudit: [ on ] ... libbfd: [ on ] ... libelf: [ on ] ... libnuma: [ on ] ... numa_num_possible_cpus: [ on ] ... libperl: [ on ] ... libpython: [ on ] ... libslang: [ on ] ... libcrypto: [ on ] ... libunwind: [ on ] ... libdw-dwarf-unwind: [ on ] ... zlib: [ on ] ... lzma: [ on ] ... get_cpuid: [ on ] ... bpf: [ on ] GEN /tmp/build/perf/common-cmds.h HOSTCC /tmp/build/perf/fixdep.o HOSTLD /tmp/build/perf/fixdep-in.o LINK /tmp/build/perf/fixdep MKDIR /tmp/build/perf/pmu-events/ HOSTCC /tmp/build/perf/pmu-events/json.o MKDIR /tmp/build/perf/pmu-events/ HOSTCC /tmp/build/perf/pmu-events/jsmn.o HOSTCC /tmp/build/perf/pmu-events/jevents.o HOSTLD /tmp/build/perf/pmu-events/jevents-in.o PERF_VERSION = 4.9.rc8.g868cd5 CC /tmp/build/perf/perf-read-vdso32 <SNIP> After: $ rm -rf /tmp/build/perf/ ; mkdir -p /tmp/build/perf ; make -k O=/tmp/build/perf -C tools/perf install-bin make: Entering directory '/home/acme/git/linux/tools/perf' BUILD: Doing 'make -j4' parallel build HOSTCC /tmp/build/perf/fixdep.o HOSTLD /tmp/build/perf/fixdep-in.o LINK /tmp/build/perf/fixdep Auto-detecting system features: ... dwarf: [ on ] ... dwarf_getlocations: [ on ] ... glibc: [ on ] ... gtk2: [ on ] ... libaudit: [ on ] ... libbfd: [ on ] ... libelf: [ on ] ... libnuma: [ on ] ... numa_num_possible_cpus: [ on ] ... libperl: [ on ] ... libpython: [ on ] ... libslang: [ on ] ... libcrypto: [ on ] ... libunwind: [ on ] ... libdw-dwarf-unwind: [ on ] ... zlib: [ on ] ... lzma: [ on ] ... get_cpuid: [ on ] ... bpf: [ on ] GEN /tmp/build/perf/common-cmds.h MKDIR /tmp/build/perf/fd/ CC /tmp/build/perf/fd/array.o LD /tmp/build/perf/fd/libapi-in.o MKDIR /tmp/build/perf/fs/ CC /tmp/build/perf/event-parse.o CC /tmp/build/perf/fs/fs.o PERF_VERSION = 4.9.rc8.g57a92f CC /tmp/build/perf/event-plugin.o MKDIR /tmp/build/perf/fs/ CC /tmp/build/perf/fs/tracing_path.o <SNIP> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1481030331-31944-3-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-06perf tools: Move PERF-VERSION-FILE target into rules areaJiri Olsa
An upcoming fixdep fix needs all targets at the same area, so they'll fit under a signal condition block. Moving PERF-VERSION-FILE target into rules section. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1481030331-31944-2-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-06perf build: Check LLVM version in feature checkWang Nan
Cancel builtin llvm and clang support when LLVM version is less than 3.9.0: following commits uses newer API. Since Clang/LLVM's API is not guaranteed to be stable, add a test-llvm-version.cpp feature checker, issue warning if LLVM found in compiling environment is not tested yet. Committer Notes: Testing it: Environment: $ cat /etc/fedora-release Fedora release 25 (Twenty Five) $ rpm -q llvm-devel clang-devel llvm-devel-3.8.0-1.fc25.x86_64 clang-devel-3.8.0-2.fc25.x86_64 $ Before: $ make -k LIBCLANGLLVM=1 O=/tmp/build/perf -C tools/perf install-bin make: Entering directory '/home/acme/git/linux/tools/perf' BUILD: Doing 'make -j4' parallel build Warning: tools/include/uapi/linux/bpf.h differs from kernel Warning: tools/arch/arm/include/uapi/asm/kvm.h differs from kernel INSTALL GTK UI LINK /tmp/build/perf/perf /tmp/build/perf/libperf.a(libperf-in.o): In function `perf::createCompilerInvocation(llvm::SmallVector<char const*, 16u>, llvm::StringRef&, clang::DiagnosticsEngine&)': /home/acme/git/linux/tools/perf/util/c++/clang.cpp:56: undefined reference to `clang::tooling::newInvocation(clang::DiagnosticsEngine*, llvm::SmallVector<char const*, 16u> const&)' /tmp/build/perf/libperf.a(libperf-in.o): In function `perf::getModuleFromSource(llvm::SmallVector<char const*, 16u>, llvm::StringRef, llvm::IntrusiveRefCntPtr<clang::vfs::FileSystem>)': /home/acme/git/linux/tools/perf/util/c++/clang.cpp:68: undefined reference to `clang::CompilerInstance::CompilerInstance(std::shared_ptr<clang::PCHContainerOperations>, bool)' /home/acme/git/linux/tools/perf/util/c++/clang.cpp:69: undefined reference to `clang::CompilerInstance::createDiagnostics(clang::DiagnosticConsumer*, bool)' <SNIP> After: Makefile.config:807: No suitable libLLVM found, disabling builtin clang and llvm support. Please install llvm-dev(el) (>= 3.9.0) Updating the environment to a locally built LLVM 4.0 + clang 3.9 (forgot to git pull, duh) combo, all works as expected, it is properly detected and built into the resulting perf binary. Signed-off-by: Wang Nan <wangnan0@huawei.com> Reported-and-Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Joe Stringer <joe@ovn.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/20161206072230.7651-1-wangnan0@huawei.com [ Change the warning message a bit (add 'suitable' and 'builtin'), clarifying it, see committer notes above ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-06bpf: add additional verifier tests for BPF_PROG_TYPE_LWT_*Thomas Graf
- direct packet read is allowed for LWT_* - direct packet write for LWT_IN/LWT_OUT is prohibited - direct packet write for LWT_XMIT is allowed - access to skb->tc_classid is prohibited for LWT_* Signed-off-by: Thomas Graf <tgraf@suug.ch> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-06tools: hv: Enable network manager for bonding scripts on RHELHaiyang Zhang
We found network manager is necessary on RHEL to make the synthetic NIC, VF NIC bonding operations handled automatically. So, enabling network manager here. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-06objtool: Fix bytes check of lea's rex_prefixJiri Slaby
For the "lea %(rsp), %rbp" case, we check if there is a rex_prefix. But we check 'bytes' which is insn_byte_t[4] in rex_prefix (insn_field structure). Therefore, the check is always true. Instead, check 'nbytes' which is the right one. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20161205105551.25917-1-jslaby@suse.cz Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-12-05perf annotate: Show raw form for jump instruction with indirect targetRavi Bangoria
For jump instructions that does not include target address as direct operand, show the original disassembled line for them. This is needed for certain powerpc jump instructions that use target address in a register (such as bctr, btar, ...). Before: ld r12,32088(r12) mtctr r12 v bctr ffffffffffffca2c std r2,24(r1) addis r12,r2,-1 After: ld r12,32088(r12) mtctr r12 v bctr std r2,24(r1) addis r12,r2,-1 Committer notes: Testing it using a perf.data file and vmlinux for powerpc64, cross-annotating it on a x86_64 workstation: Before: .__bpf_prog_run vmlinux.powerpc │ std r10,512(r9) ▒ │ lbz r9,0(r31) ▒ │ rldicr r9,r9,3,60 ▒ │ ldx r9,r30,r9 ▒ │ mtctr r9 ▒ 100.00 │ ↓ bctr 3fffffffffe01510 ▒ │ lwa r10,4(r31) ▒ │ lwz r9,0(r31) ▒ <SNIP> Invalid jump offset: 3fffffffffe01510 After: .__bpf_prog_run vmlinux.powerpc │ std r10,512(r9) ▒ │ lbz r9,0(r31) ▒ │ rldicr r9,r9,3,60 ▒ │ ldx r9,r30,r9 ▒ │ mtctr r9 ▒ 100.00 │ ↓ bctr ▒ │ lwa r10,4(r31) ▒ │ lwz r9,0(r31) ▒ <SNIP> Invalid jump offset: 3fffffffffe01510 This, in turn, uncovers another problem with jumps without operands, the ENTER/-> operation, to jump to the target, still continues using the bogus target :-) BTW, this was the file used for the above tests: [acme@jouet ravi_bangoria]$ perf report --header-only -i perf.data.f22vm.powerdev # ======== # captured on: Thu Nov 24 12:40:38 2016 # hostname : pdev-f22-qemu # os release : 4.4.10-200.fc22.ppc64 # perf version : 4.9.rc1.g6298ce # arch : ppc64 # nrcpus online : 48 # nrcpus avail : 48 # cpudesc : POWER7 (architected), altivec supported # cpuid : 74,513 # total memory : 4158976 kB # cmdline : /home/ravi/Workspace/linux/tools/perf/perf record -a # event : name = cycles:ppp, , size = 112, { sample_period, sample_freq } = 4000, sample_type = IP|TID|TIME|CPU|PERIOD, disabled = 1, inherit = 1, mmap = 1, c # HEADER_CPU_TOPOLOGY info available, use -I to display # HEADER_NUMA_TOPOLOGY info available, use -I to display # pmu mappings: cpu = 4, software = 1, tracepoint = 2, breakpoint = 5 # missing features: HEADER_TRACING_DATA HEADER_BRANCH_STACK HEADER_GROUP_DESC HEADER_AUXTRACE HEADER_STAT HEADER_CACHE # ======== # [acme@jouet ravi_bangoria]$ Suggested-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Chris Riyder <chris.ryder@arm.com> Cc: Kim Phillips <kim.phillips@arm.com> Cc: Markus Trippelsdorf <markus@trippelsdorf.de> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Taeung Song <treeze.taeung@gmail.com> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/1480953407-7605-1-git-send-email-ravi.bangoria@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-05perf tools: Add non config targetsJiri Olsa
Adding some missing non config targets that were for some reason omitted. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1480884178-8072-7-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-05perf tools: Cleanup build directory before each testJiri Olsa
Cleanup the fixdep tool before every test. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1480884178-8072-8-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-05perf tools: Move python/perf.so target into rules areaJiri Olsa
Following fixdep fix needs all targets at the same area, so they'll fit under signal condition block. Moving python/perf.so target into rules section and intentionally removing the perl script related comment. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1480884178-8072-5-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-05perf tools: Move install-gtk target into rules areaJiri Olsa
The upcoming fixdep fix needs all targets at the same area, so they'll fit under a signal condition block. Move install-gtk target into the rules section. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1480884178-8072-4-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-05tools build: Move tabs to spaces where suitableJiri Olsa
We've been hit several times by a Makefile bug where line indented by tab was falsely considered as target command. We prevent this by always using space indentation for everything except for the target commands. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1480884178-8072-3-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-05tools build: Make the .cmd file more readableJiri Olsa
Putting extra line between dependencies and cmd_* definition to make it more readable. Before: $ cat .builtin-top.o.cmd ... /home/jolsa/kernel/linux-perf/tools/include/linux/stringify.h \ /home/jolsa/kernel/linux-perf/tools/include/linux/time64.h cmd_builtin-top.o := gcc -Wp,-MD,./.builtin-top.o.d -Wp,-MT,builtin-... ... After: $ cat .builtin-top.o.cmd ... /home/jolsa/kernel/linux-perf/tools/include/linux/stringify.h \ /home/jolsa/kernel/linux-perf/tools/include/linux/time64.h cmd_builtin-top.o := gcc -Wp,-MD,./.builtin-top.o.d -Wp,-MT,builtin-... ... Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1480884178-8072-2-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-05perf clang: Compile BPF script using builtin clang supportWang Nan
After this patch, perf utilizes builtin clang support to build BPF script, no longer depend on external clang, but fallbacking to it if for some reason the builtin compiling framework fails. Test: $ type clang -bash: type: clang: not found $ cat ~/.perfconfig $ echo '#define LINUX_VERSION_CODE 0x040700' > ./test.c $ cat ./tools/perf/tests/bpf-script-example.c >> ./test.c $ ./perf record -v --dry-run -e ./test.c 2>&1 | grep builtin bpf: successfull builtin compilation $ Can't pass cflags so unable to include kernel headers now. Will be fixed by following commits. Committer notes: Make sure '-v' comes before the '-e ./test.c' in the command line otherwise the 'verbose' variable will not be set when the bpf event is parsed and thus the pr_debug indicating a 'successfull builtin compilation' will not be output, as the debug level (1) will be less than what 'verbose' has at that point (0). Signed-off-by: Wang Nan <wangnan0@huawei.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Joe Stringer <joe@ovn.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/20161126070354.141764-16-wangnan0@huawei.com [ Spell check/reflow successfull pr_debug string ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-05perf clang: Support compile IR to BPF object and add testcaseWang Nan
getBPFObjectFromModule() is introduced to compile LLVM IR(Module) to BPF object. Add new testcase for it. Test result: $ ./buildperf/perf test -v clang 51: builtin clang support : 51.1: builtin clang compile C source to IR : --- start --- test child forked, pid 21822 test child finished with 0 ---- end ---- builtin clang support subtest 0: Ok 51.2: builtin clang compile C source to ELF object : --- start --- test child forked, pid 21823 test child finished with 0 ---- end ---- builtin clang support subtest 1: Ok Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Joe Stringer <joe@ovn.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/20161126070354.141764-15-wangnan0@huawei.com [ Remove redundant "Test" from entry descriptions ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-05perf clang: Update test case to use real BPF scriptWang Nan
Allow C++ code to use util.h and tests/llvm.h. Let 'perf test' compile a real BPF script. Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Joe Stringer <joe@ovn.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/20161126070354.141764-14-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-05perf clang: Allow passing CFLAGS to builtin clangWang Nan
Improve getModuleFromSource() API to accept a cflags list. This feature will be used to pass LINUX_VERSION_CODE and -I flags. Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Joe Stringer <joe@ovn.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/20161126070354.141764-13-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-05perf clang: Use real file system for #includeWang Nan
Utilize clang's OverlayFileSystem facility, allow CompilerInstance to access real file system. With this patch the '#include' directive can be used. Add a new getModuleFromSource for real file. Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Joe Stringer <joe@ovn.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/20161126070354.141764-12-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-05perf clang: Add builtin clang support ant test caseWang Nan
Add basic clang support in clang.cpp and test__clang() testcase. The first testcase checks if builtin clang is able to generate LLVM IR. tests/clang.c is a proxy. Real testcase resides in utils/c++/clang-test.cpp in c++ and exports C interface to perf test subsystem. Test result: $ perf test -v clang 51: builtin clang support : 51.1: Test builtin clang compile C source to IR : --- start --- test child forked, pid 13215 test child finished with 0 ---- end ---- Test builtin clang support subtest 0: Ok Committer note: Make sure you've enabled CLANG and LLVM builtin support by setting the LIBCLANGLLVM variable on the make command line, e.g.: make LIBCLANGLLVM=1 O=/tmp/build/perf -C tools/perf install-bin Otherwise you'll get this when trying to do the 'perf test' call above: # perf test clang 51: builtin clang support : Skip (not compiled in) # Signed-off-by: Wang Nan <wangnan0@huawei.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Joe Stringer <joe@ovn.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/20161126070354.141764-11-wangnan0@huawei.com [ Removed "Test" from descriptions, redundant and already removed from all the other entries ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-05perf build: Add clang and llvm compile and linking supportWang Nan
Add necessary c++ flags and link libraries to support builtin clang and LLVM. Add all llvm and clang libraries, so don't need to worry about clang changes its libraries setting. However, linking perf would take much longer than usual. Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Joe Stringer <joe@ovn.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/20161126070354.141764-10-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-05tools build: Add feature detection for clangWang Nan
Check if basic clang compiling environment is ready. Doesn't like 'llvm-config --libs' which can returns llvm libraries in right order and duplicates some libraries if necessary, there's no correspondence for clang libraries (-lclangxxx). to avoid extra complexity and to avoid new clang breaking libraries ordering, use --start-group and --end-group. In this test case, manually identify required clang libs and hope it to be stable. Putting all clang libraries here is possible (use make's wildcard), but then feature checking becomes very slow. Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Joe Stringer <joe@ovn.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/20161126070354.141764-9-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-05tools build: Add feature detection for LLVMWang Nan
Check if basic LLVM compiling environment is ready. Use llvm-config to detect include and library directories. Avoid using 'llvm-config --cxxflags' because its result contain some unwanted flags like --sysroot (if LLVM is built by yocto). Use '?=' to set LLVM_CONFIG, so explicitly passing LLVM_CONFIG to make would override it. Use 'llvm-config --libs BPF' to check if BPF backend is compiled in. Since now BPF bytecode is the only required backend, no need to waste time linking llvm and clang if BPF backend is missing. This also introduce an implicit requirement that LLVM should be new enough. Old LLVM doesn't support BPF backend. Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Joe Stringer <joe@ovn.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/20161126070354.141764-8-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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