1. 11 Dec, 2014 5 commits
  2. 10 Dec, 2014 1 commit
  3. 09 Dec, 2014 12 commits
  4. 08 Dec, 2014 2 commits
  5. 01 Dec, 2014 9 commits
    • Andi Kleen's avatar
      perf report: In branch stack mode use address history sorting · 09a6a1b0
      Andi Kleen authored
      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: default avatarAndi Kleen <ak@linux.intel.com>
      Link: http://lkml.kernel.org/r/1416275935-20971-1-git-send-email-andi@firstfloor.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      09a6a1b0
    • Andi Kleen's avatar
      perf report: Add --branch-history option · fa94c36c
      Andi Kleen authored
      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: default avatarAndi 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      fa94c36c
    • Andi Kleen's avatar
      perf callchain: Support handling complete branch stacks as histograms · 8b7bad58
      Andi Kleen authored
      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: default avatarAndi 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      8b7bad58
    • Jiri Olsa's avatar
      perf stat: Add support for snapshot counters · 6c0345b7
      Jiri Olsa authored
      The .snapshot file indicates that the provided event value is a snapshot
      value. Bypassing the delta computation logic for such event.
      Signed-off-by: default avatarJiri 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      6c0345b7
    • Jiri Olsa's avatar
      perf stat: Add support for per-pkg counters · 779d0b99
      Jiri Olsa authored
      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: default avatarJiri 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      779d0b99
    • Jiri Olsa's avatar
      perf tools: Remove perf_evsel__read interface · a5a7fd76
      Jiri Olsa authored
      Removing the perf_evsel__read interfaces because we replaced the only
      user in the stat command code.
      Signed-off-by: default avatarJiri 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      a5a7fd76
    • Jiri Olsa's avatar
      perf stat: Use read_counter in read_counter_aggr · 1971f59f
      Jiri Olsa authored
      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: default avatarJiri 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      1971f59f
    • Jiri Olsa's avatar
      perf stat: Make read_counter work over the thread dimension · 9bf1a529
      Jiri Olsa authored
      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: default avatarJiri 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      9bf1a529
    • Jiri Olsa's avatar
      perf stat: Use perf_evsel__read_cb in read_counter · 060c4f9c
      Jiri Olsa authored
      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: default avatarJiri 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      060c4f9c
  6. 24 Nov, 2014 11 commits