1. 09 12月, 2014 10 次提交
  2. 08 12月, 2014 2 次提交
  3. 02 12月, 2014 9 次提交
    • A
      perf report: In branch stack mode use address history sorting · 09a6a1b0
      Andi Kleen 提交于
      Enable CCKEY_ADDRESS address history sorting with --branch-history.
      This makes get_srcline display the source lines correctly, otherwise all
      history entries for a function a hunked into one.
      Signed-off-by: NAndi Kleen <ak@linux.intel.com>
      Link: http://lkml.kernel.org/r/1416275935-20971-1-git-send-email-andi@firstfloor.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      09a6a1b0
    • A
      perf report: Add --branch-history option · fa94c36c
      Andi Kleen 提交于
      Add a --branch-history option to perf report that changes all the
      settings necessary for using the branches in callstacks.
      
      This is just a short cut to make this nicer to use, it does not enable
      any functionality by itself.
      
      v2: Change sort order. Rename option to --branch-history to
          be less confusing.
      v3: Updates
      v4: Fix conflict with newer perf base
      v5: Port to latest tip
      v6: Add more comments. Remove CCKEY_ADDRESS setting. Remove
          unnecessary branch_mode setting. Use a boolean.
      Signed-off-by: NAndi Kleen <ak@linux.intel.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Link: http://lkml.kernel.org/r/1415844328-4884-5-git-send-email-andi@firstfloor.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      fa94c36c
    • A
      perf callchain: Support handling complete branch stacks as histograms · 8b7bad58
      Andi Kleen 提交于
      Currently branch stacks can be only shown as edge histograms for
      individual branches. I never found this display particularly useful.
      
      This implements an alternative mode that creates histograms over
      complete branch traces, instead of individual branches, similar to how
      normal callgraphs are handled. This is done by putting it in front of
      the normal callgraph and then using the normal callgraph histogram
      infrastructure to unify them.
      
      This way in complex functions we can understand the control flow that
      lead to a particular sample, and may even see some control flow in the
      caller for short functions.
      
      Example (simplified, of course for such simple code this is usually not
      needed), please run this after the whole patchkit is in, as at this
      point in the patch order there is no --branch-history, that will be
      added in a patch after this one:
      
      tcall.c:
      
      volatile a = 10000, b = 100000, c;
      
      __attribute__((noinline)) f2()
      {
      	c = a / b;
      }
      
      __attribute__((noinline)) f1()
      {
      	f2();
      	f2();
      }
      main()
      {
      	int i;
      	for (i = 0; i < 1000000; i++)
      		f1();
      }
      
      % perf record -b -g ./tsrc/tcall
      [ perf record: Woken up 1 times to write data ]
      [ perf record: Captured and wrote 0.044 MB perf.data (~1923 samples) ]
      % perf report --no-children --branch-history
      ...
          54.91%  tcall.c:6  [.] f2                      tcall
                  |
                  |--65.53%-- f2 tcall.c:5
                  |          |
                  |          |--70.83%-- f1 tcall.c:11
                  |          |          f1 tcall.c:10
                  |          |          main tcall.c:18
                  |          |          main tcall.c:18
                  |          |          main tcall.c:17
                  |          |          main tcall.c:17
                  |          |          f1 tcall.c:13
                  |          |          f1 tcall.c:13
                  |          |          f2 tcall.c:7
                  |          |          f2 tcall.c:5
                  |          |          f1 tcall.c:12
                  |          |          f1 tcall.c:12
                  |          |          f2 tcall.c:7
                  |          |          f2 tcall.c:5
                  |          |          f1 tcall.c:11
                  |          |
                  |           --29.17%-- f1 tcall.c:12
                  |                     f1 tcall.c:12
                  |                     f2 tcall.c:7
                  |                     f2 tcall.c:5
                  |                     f1 tcall.c:11
                  |                     f1 tcall.c:10
                  |                     main tcall.c:18
                  |                     main tcall.c:18
                  |                     main tcall.c:17
                  |                     main tcall.c:17
                  |                     f1 tcall.c:13
                  |                     f1 tcall.c:13
                  |                     f2 tcall.c:7
                  |                     f2 tcall.c:5
                  |                     f1 tcall.c:12
      
      The default output is unchanged.
      
      This is only implemented in perf report, no change to record or anywhere
      else.
      
      This adds the basic code to report:
      
      - add a new "branch" option to the -g option parser to enable this mode
      - when the flag is set include the LBR into the callstack in machine.c.
      
      The rest of the history code is unchanged and doesn't know the
      difference between LBR entry and normal call entry.
      
      - detect overlaps with the callchain
      - remove small loop duplicates in the LBR
      
      Current limitations:
      
      - The LBR flags (mispredict etc.) are not shown in the history
      and LBR entries have no special marker.
      - It would be nice if annotate marked the LBR entries somehow
      (e.g. with arrows)
      
      v2: Various fixes.
      v3: Merge further patches into this one. Fix white space.
      v4: Improve manpage. Address review feedback.
      v5: Rename functions. Better error message without -g. Fix crash without
          -b.
      v6: Rebase
      v7: Rebase. Use NO_ENTRY in memset.
      v8: Port to latest tip. Move add_callchain_ip to separate
          patch. Skip initial entries in callchain. Minor cleanups.
      Signed-off-by: NAndi Kleen <ak@linux.intel.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Link: http://lkml.kernel.org/r/1415844328-4884-3-git-send-email-andi@firstfloor.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      8b7bad58
    • J
      perf stat: Add support for snapshot counters · 6c0345b7
      Jiri Olsa 提交于
      The .snapshot file indicates that the provided event value is a snapshot
      value. Bypassing the delta computation logic for such event.
      Signed-off-by: NJiri Olsa <jolsa@kernel.org>
      Cc: Andi Kleen <ak@linux.intel.com>
      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: Matt Fleming <matt.fleming@intel.com>
      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/1416562275-12404-12-git-send-email-jolsa@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      6c0345b7
    • J
      perf stat: Add support for per-pkg counters · 779d0b99
      Jiri Olsa 提交于
      The .per-pkg file indicates that all but one value per socket should be
      discarded. Adding the logic of skipping the rest of the socket once
      first value was read.
      Signed-off-by: NJiri Olsa <jolsa@kernel.org>
      Cc: Andi Kleen <ak@linux.intel.com>
      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: Matt Fleming <matt.fleming@intel.com>
      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/1416562275-12404-11-git-send-email-jolsa@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      779d0b99
    • J
      perf tools: Remove perf_evsel__read interface · a5a7fd76
      Jiri Olsa 提交于
      Removing the perf_evsel__read interfaces because we replaced the only
      user in the stat command code.
      Signed-off-by: NJiri Olsa <jolsa@kernel.org>
      Cc: Andi Kleen <ak@linux.intel.com>
      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: Matt Fleming <matt.fleming@intel.com>
      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/1416562275-12404-8-git-send-email-jolsa@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      a5a7fd76
    • J
      perf stat: Use read_counter in read_counter_aggr · 1971f59f
      Jiri Olsa 提交于
      Use the read_counter function as the values retrieval function for aggr
      counter values thus eliminating the use of __perf_evsel__read function.
      Signed-off-by: NJiri Olsa <jolsa@kernel.org>
      Cc: Andi Kleen <ak@linux.intel.com>
      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: Matt Fleming <matt.fleming@intel.com>
      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/1416562275-12404-7-git-send-email-jolsa@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      1971f59f
    • J
      perf stat: Make read_counter work over the thread dimension · 9bf1a529
      Jiri Olsa 提交于
      The read function will be used later for both aggr and cpu counters, so
      we need to make it work over threads as well.
      Signed-off-by: NJiri Olsa <jolsa@kernel.org>
      Cc: Andi Kleen <ak@linux.intel.com>
      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: Matt Fleming <matt.fleming@intel.com>
      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/1416562275-12404-6-git-send-email-jolsa@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      9bf1a529
    • J
      perf stat: Use perf_evsel__read_cb in read_counter · 060c4f9c
      Jiri Olsa 提交于
      Replacing __perf_evsel__read_on_cpu function with perf_evsel__read_cb
      function. The read_cb callback will be used later for global aggregation
      counter values as well.
      Signed-off-by: NJiri Olsa <jolsa@kernel.org>
      Cc: Andi Kleen <ak@linux.intel.com>
      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: Matt Fleming <matt.fleming@intel.com>
      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/1416562275-12404-5-git-send-email-jolsa@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      060c4f9c
  4. 25 11月, 2014 10 次提交
  5. 24 11月, 2014 2 次提交
    • N
      perf tools: Collapse first level callchain entry if it has sibling · a7444af6
      Namhyung Kim 提交于
      If first level callchain has more than single path like when -g caller
      option is given, it should show only first one in the path and hide
      others.  But it didn't do it properly and just hindered the output.
      
      Before:
        -   80.33%    11.11%  abc2     abc2              [.] main
           + 86.18% main
             13.82% __libc_start_main
                main
      
      After:
        -   80.33%    11.11%  abc2     abc2              [.] main
           + 86.18% main
           + 13.82% __libc_start_main
      Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
      Cc: Andi Kleen <andi@firstfloor.org>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Namhyung Kim <namhyung.kim@lge.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Link: http://lkml.kernel.org/r/1416816807-6495-2-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      a7444af6
    • N
      perf hists browser: Print overhead percent value for first-level callchain · 4087d11c
      Namhyung Kim 提交于
      Currently perf report on TUI doesn't print percent for first-level
      callchain entry.
      
      I guess it (wrongly) assumes that there's only a single callchain in the
      first level.
      
      This patch fixes it by handling the first level callchains same as
      others - if it's not 100% it should print the percent value.
      
      Also it'll affect other callchains in the other way around - if it's
      100% (single callchain) it should not print the percentage.
      
      Before:
        -   30.95%     6.84%  abc2     abc2              [.] a
           - a
              - 70.00% c
                 - 100.00% apic_timer_interrupt
                      smp_apic_timer_interrupt
                      local_apic_timer_interrupt
                      hrtimer_interrupt
                      ...
              + 30.00% b
           + __libc_start_main
      
      After:
        -   30.95%     6.84%  abc2     abc2              [.] a
           - 77.90% a
              - 70.00% c
                 - apic_timer_interrupt
                   smp_apic_timer_interrupt
                   local_apic_timer_interrupt
                   hrtimer_interrupt
                   ...
              + 30.00% b
           + 22.10% __libc_start_main
      Reported-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
      Cc: Andi Kleen <andi@firstfloor.org>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Namhyung Kim <namhyung.kim@lge.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Link: http://lkml.kernel.org/r/1416816807-6495-1-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      4087d11c
  6. 20 11月, 2014 1 次提交
    • I
      Merge tag 'perf-core-for-mingo' of... · 4e6e311e
      Ingo Molnar 提交于
      Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
      
      Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:
      
      User visible fixes:
      
       - Fallback to kallsyms when using the minimal 'ELF' loader (Arnaldo Carvalho de Melo)
      
       - Fix annotation with kcore (Adrian Hunter)
      
       - Fix up srcline histogram key formatting (Arnaldo Carvalho de Melo)
      
       - Add missing handler for PERF_RECORD_MMAP2 events in 'perf diff' (Kan Liang)
      
      User visible changes/new features:
      
       - Only print base source file for srcline histogram sort key (Andi Kleen)
      
       - Support source line numbers in annotate using a hotkey (Andi Kleen)
      
      Infrastructure changes and fixes:
      
       - Do not poll events that use the system_wide flag (Adrian Hunter)
      
       - Add perf-read-vdso32 and perf-read-vdsox32 to .gitignore (Adrian Hunter)
      
       - Only override the default :tid comm entry (Adrian Hunter)
      
       - Factor out adding new call chain entries (Andi Kleen)
      
       - Use al.addr to set up call chain (Andi Kleen)
      
       - Use a common function to resolve symbol or name (Andi Kleen)
      
       - Fix ftrace:function event recording (Jiri Olsa)
      
       - Move disable_buildid_cache() to util/build-id.c (Namhyung Kim)
      
       - Clean up libelf feature support code (Namhyung Kim)
      
       - Fix typo in python 'perf test' (WANG Chao)
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      Signed-off-by: NIngo Molnar <mingo@kernel.org>
      4e6e311e
  7. 19 11月, 2014 6 次提交