1. 19 May, 2010 3 commits
    • Arnaldo Carvalho de Melo's avatar
      perf probe: Fix some error exit paths · b448c4b6
      Arnaldo Carvalho de Melo authored
      
      
      That could leave filedescriptors open and leak memory. Also stop using
      xmalloc, use malloc and handle results just like other error cases in
      the same routine that used it.
      
      Cc: Frédéric Weisbecker <fweisbec@gmail.com>
      Cc: Masami Hiramatsu <mhiramat@redhat.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      b448c4b6
    • Arnaldo Carvalho de Melo's avatar
      perf tools: Remove some unused functions · a41794cd
      Arnaldo Carvalho de Melo authored
      
      
      Without the bloated cplus_demangle from binutils, i.e building with:
      
      $ make NO_DEMANGLE=1 O=~acme/git/build/perf -j3 -C tools/perf/ install
      
      Before:
      
         text	   data	    bss	    dec	    hex	filename
       471851	  29280	4025056	4526187	 45106b	/home/acme/bin/perf
      
      After:
      
      [acme@doppio linux-2.6-tip]$ size ~/bin/perf
         text	   data	    bss	    dec	    hex	filename
       446886	  29232	4008576	4484694	 446e56	/home/acme/bin/perf
      
      So its a 5.3% size reduction in code, but the interesting part is in the git
      diff --stat output:
      
       19 files changed, 20 insertions(+), 1909 deletions(-)
      
      If we ever need some of the things we got from git but weren't using, we just
      have to go to the git repo and get fresh, uptodate source code bits.
      
      Cc: Frédéric Weisbecker <fweisbec@gmail.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      a41794cd
    • Stephane Eranian's avatar
      perf stat: add perf stat -B to pretty print large numbers · 5af52b51
      Stephane Eranian authored
      
      
      It is hard to read very large numbers so provide an option to perf stat
      to separate thousands using a separator. The patch leverages the locale
      support of stdio. You need to set your LC_NUMERIC appropriately, for
      instance LC_NUMERIC=en_US.UTF8. You need to pass -B to activate this
      feature. This way existing scripts parsing the output do not need to be
      changed. Here is an example.
      
      $ perf stat noploop 2
      noploop for 2 seconds
      
       Performance counter stats for 'noploop 2':
      
              1998.347031  task-clock-msecs         #      0.998 CPUs
                       61  context-switches         #      0.000 M/sec
                        0  CPU-migrations           #      0.000 M/sec
                      118  page-faults              #      0.000 M/sec
            4,138,410,900  cycles                   #   2070.917 M/sec  (scaled from 70.01%)
            2,062,650,268  instructions             #      0.498 IPC    (scaled from 70.01%)
            2,057,653,466  branches                 #   1029.678 M/sec  (scaled from 70.01%)
                   40,267  branch-misses            #      0.002 %      (scaled from 30.04%)
            2,055,961,348  cache-references         #   1028.831 M/sec  (scaled from 30.03%)
                   53,725  cache-misses             #      0.027 M/sec  (scaled from 30.02%)
      
              2.001393933  seconds time elapsed
      
      $ perf stat -B  noploop 2
      noploop for 2 seconds
      
       Performance counter stats for 'noploop 2':
      
              1998.297883  task-clock-msecs         #      0.998 CPUs
                       59  context-switches         #      0.000 M/sec
                        0  CPU-migrations           #      0.000 M/sec
                      119  page-faults              #      0.000 M/sec
            4,131,380,160  cycles                   #   2067.450 M/sec  (scaled from 70.01%)
            2,059,096,507  instructions             #      0.498 IPC    (scaled from 70.01%)
            2,054,681,303  branches                 #   1028.216 M/sec  (scaled from 70.01%)
                   25,650  branch-misses            #      0.001 %      (scaled from 30.05%)
            2,056,283,014  cache-references         #   1029.017 M/sec  (scaled from 30.03%)
                   47,097  cache-misses             #      0.024 M/sec  (scaled from 30.02%)
      
              2.001391016  seconds time elapsed
      
      Cc: David S. Miller <davem@davemloft.net>
      Cc: Frédéric Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <4bf28fe8.914ed80a.01ca.fffff5f5@mx.google.com>
      Signed-off-by: default avatarStephane Eranian <eranian@google.com>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      5af52b51
  2. 18 May, 2010 12 commits
  3. 17 May, 2010 11 commits
  4. 16 May, 2010 3 commits
  5. 15 May, 2010 4 commits
  6. 14 May, 2010 4 commits
    • Arnaldo Carvalho de Melo's avatar
      perf newt: Make <- zoom out filters · 3e1bbdc3
      Arnaldo Carvalho de Melo authored
      
      
      After we use the filters to zoom into DSOs or threads, we can use <-
      (left arrow) to zoom out from the last filter applied.
      
      It is still possible to zoom out of order by using the popup menu.
      
      With this we now have the zoom out operation on the browsing fast path,
      by allowing fast navigation using just the four arrors and the enter key
      to expand collapse callchains.
      Suggested-by: default avatarIngo Molnar <mingo@elte.hu>
      Cc: Frédéric Weisbecker <fweisbec@gmail.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      3e1bbdc3
    • Arnaldo Carvalho de Melo's avatar
      perf report: Report number of events, not samples · c82ee828
      Arnaldo Carvalho de Melo authored
      
      
      Number of samples is meaningless after we switched to auto-freq, so
      report the number of events, i.e. not the sum of the different periods,
      but the number PERF_RECORD_SAMPLE emitted by the kernel.
      
      While doing this I noticed that naming "count" to the sum of all the
      event periods can be confusing, so rename it to .period, just like in
      struct sample.data, so that we become more consistent.
      
      This helps with the next step, that was to record in struct hist_entry
      the number of sample events for each instance, we need that because we
      use it to generate the number of events when applying filters to the
      tree of hist entries like it is being done in the TUI report browser.
      Suggested-by: default avatarIngo Molnar <mingo@elte.hu>
      Cc: Frédéric Weisbecker <fweisbec@gmail.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      c82ee828
    • Arnaldo Carvalho de Melo's avatar
      perf hist: Clarify events_stats fields usage · cee75ac7
      Arnaldo Carvalho de Melo authored
      
      
      The events_stats.total field is too generic, rename it to .total_period,
      and also add a comment explaining that it is the sum of all the .period
      fields in samples, that is needed because we use auto-freq to avoid
      sampling artifacts.
      
      Ditto for events_stats.lost, that is the sum of all lost_event.lost
      fields, i.e. the number of events the kernel dropped.
      
      Looking at the users, builtin-sched.c can make use of these fields and
      stop doing it again.
      
      Cc: Frédéric Weisbecker <fweisbec@gmail.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      cee75ac7
    • Arnaldo Carvalho de Melo's avatar
      perf hist: Make event__totals per hists · c8446b9b
      Arnaldo Carvalho de Melo authored
      
      
      This is one more thing that started global but are more useful per hist
      or per session.
      
      Cc: Frédéric Weisbecker <fweisbec@gmail.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      c8446b9b
  7. 13 May, 2010 3 commits