1. 10 Aug, 2010 10 commits
  2. 07 Aug, 2010 1 commit
  3. 06 Aug, 2010 4 commits
  4. 05 Aug, 2010 13 commits
  5. 04 Aug, 2010 4 commits
  6. 03 Aug, 2010 3 commits
  7. 02 Aug, 2010 5 commits
    • Arnaldo Carvalho de Melo's avatar
      perf tools: Don't keep unreferenced maps when unmaps are detected · 0a1eae39
      Arnaldo Carvalho de Melo authored
      For a file with:
      
      [root@emilia linux-2.6-tip]# perf report -D -fi allmodconfig-j32.perf.data | grep events:
           TOTAL events:      36933
            MMAP events:       9056
            LOST events:          0
            COMM events:       1702
            EXIT events:       1887
        THROTTLE events:          8
      UNTHROTTLE events:          8
            FORK events:       1894
            READ events:          0
          SAMPLE events:      22378
            ATTR events:          0
      EVENT_TYPE events:          0
      TRACING_DATA events:          0
        BUILD_ID events:          0
      [root@emilia linux-2.6-tip]#
      
      Testing with valgrind and making perf_session__delete() a nop, so that
      we can notice how many maps were actually deleted due to not having any
      samples on it:
      
      ==== HEAP SUMMARY:
      
      Before:
      
      ==10339==     in use at exit: 8,909,997 bytes in 68,690 blocks
      ==10339==   total heap usage: 78,696 allocs, 10,007 frees, 11,925,853 bytes allocated
      
      After:
      
      ==10506==     in use at exit: 8,902,605 bytes in 68,606 blocks
      ==10506==   total heap usage: 78,696 allocs, 10,091 frees, 11,925,853 bytes allocated
      
      I.e. just 84 detected unmaps with no hits out of 9056 for this workload,
      not much, but in some other long running workload this may save more
      bytes.
      
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      0a1eae39
    • Arnaldo Carvalho de Melo's avatar
      perf session: Invalidate last_match when removing threads from rb_tree · 70597f21
      Arnaldo Carvalho de Melo authored
      If we receive two PERF_RECORD_EXIT for the same thread, we can end up
      reusing session->last_match and trying to remove the thread twice from
      the rb_tree, causing a segfault, so invalidade last_match in
      perf_session__remove_thread.
      
      Receiving two PERF_RECORD_EXIT for the same thread is a bug, but its a
      harmless one if we make the tool more robust, like this patch does.
      
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      70597f21
    • Arnaldo Carvalho de Melo's avatar
      perf session: Free the ref_reloc_sym memory at the right place · 076c6e45
      Arnaldo Carvalho de Melo authored
      Which is at perf_session__destroy_kernel_maps, counterpart to the
      perf_session__create_kernel_maps where the kmap structure is located, just
      after the vmlinux_maps.
      
      Make it also check if the kernel maps were actually created, which may not
      be the case if, for instance, perf_session__new can't complete due to
      permission problems in, for instance, a 'perf report' case, when a
      segfault will take place, that is how this was noticed.
      
      The problem was introduced in d65a458b, thus post .35.
      
      This also adds code to release guest machines as them are also created
      in perf_session__create_kernel_maps, so should be deleted on this newly
      introduced counterpart, perf_session__destroy_kernel_maps.
      
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      076c6e45
    • Ingo Molnar's avatar
      Merge commit 'v2.6.35' into perf/core · 3772b734
      Ingo Molnar authored
      Conflicts:
      	tools/perf/Makefile
      	tools/perf/util/hist.c
      
      Merge reason: Resolve the conflicts and update to latest upstream.
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      3772b734
    • Ingo Molnar's avatar
      Merge branch 'perf/core' of... · 9fc3af46
      Ingo Molnar authored
      Merge branch 'perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into perf/core
      9fc3af46