1. 12 5月, 2010 1 次提交
    • A
      perf ui: Add ui_helpline methods · 3798ed7b
      Arnaldo Carvalho de Melo 提交于
      Initially this was just to be able to have a printf like method to
      prepare the formatted string and then pass to newtPushHelpLine, but as
      we already have for ui_progress, etc, its a step in identifying a
      restricted, highlevel set of widgets we can then have implementations
      for multiple widget sets (GTK, etc).
      
      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: NArnaldo Carvalho de Melo <acme@redhat.com>
      3798ed7b
  2. 11 5月, 2010 15 次提交
  3. 10 5月, 2010 12 次提交
  4. 09 5月, 2010 12 次提交
    • T
      perf/live-mode: Handle payload-less events · 794e43b5
      Tom Zanussi 提交于
      Some events, such as the PERF_RECORD_FINISHED_ROUND event consist of
      only an event header and no data.  In this case, a 0-length payload
      will be read, and the 0 return value will be wrongly interpreted as an
      'unexpected end of event stream'.
      
      This patch allows for proper handling of data-less events by skipping
      0-length reads.
      Signed-off-by: NTom Zanussi <tzanussi@gmail.com>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Masami Hiramatsu <mhiramat@redhat.com>
      LKML-Reference: <1273038527.6383.51.camel@tropicana>
      Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      794e43b5
    • F
      tracing: Factorize lock events in a lock class · 2c193c73
      Frederic Weisbecker 提交于
      lock_acquired, lock_contended and lock_release now share the
      same prototype and format. Let's factorize them into a lock
      event class.
      Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      2c193c73
    • F
      tracing: Drop the nested field from lock_release event · 93135439
      Frederic Weisbecker 提交于
      Drop the nested field as we don't use it. Every nested state can
      be computed from a state machine on post processing already.
      Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      93135439
    • F
      tracing: Drop lock_acquired waittime field · 883a2a31
      Frederic Weisbecker 提交于
      Drop the waittime field from the lock_acquired event, we can
      calculate it by substracting the lock_acquired event timestamp
      with the matching lock_acquire one.
      
      It is not needed and takes useless space in the traces.
      Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      883a2a31
    • F
      perf lock: Always check min AND max wait time · 90c0e5fc
      Frederic Weisbecker 提交于
      When a lock is acquired after beeing contended, we update the
      wait time statistics for the given lock.
      But if the min wait time is updated, we don't check the max wait
      time. This is wrong because the first time we update the wait time,
      we want to update both min and max wait time.
      
      Before:
      	Name   acquired  contended total wait (ns)   max wait (ns)   min wait (ns)
      	key          8          1           21656           0           21656
      
      After:
      	Name   acquired  contended total wait (ns)   max wait (ns)   min wait (ns)
      	key          8          1           21656           21656           21656
      Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
      90c0e5fc
    • F
      perf: Fix perf lock bad rate · 5efe08cf
      Frederic Weisbecker 提交于
      Fix the cast made to get the bad rate. It is made in the result
      instead of the operands. We need the operands to be cast in double,
      otherwise the result will always be zero.
      Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
      5efe08cf
    • F
      perf: Humanize lock flags in perf lock · 84c7a217
      Frederic Weisbecker 提交于
      Use an enum instead of plain constants for lock flags.
      Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
      84c7a217
    • F
      perf: Cleanup perf lock broken states · 10350ec3
      Frederic Weisbecker 提交于
      Use enum to get a human view of bad_hist indexes and
      put bad histogram output in its own function.
      Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
      10350ec3
    • H
      perf lock: Add "info" subcommand for dumping misc information · 26242d85
      Hitoshi Mitake 提交于
      This adds the "info" subcommand to perf lock which can be used
      to dump metadata like threads or addresses of lock instances.
      "map" was removed because info should do the work for it.
      
      This will be useful not only for debugging but also for ordinary
      analyzing.
      
      v2: adding example of usage
      % sudo ./perf lock info -t
       | Thread ID: comm
       | 	 0: swapper
       |         1: init
       |        18: migration/5
       |        29: events/2
       |        32: events/5
       |        33: events/6
      ...
      
      % sudo ./perf lock info -m
      | Address of instance: name of class
      |  0xffff8800b95adae0: &(&sighand->siglock)->rlock
      |  0xffff8800bbb41ae0: &(&sighand->siglock)->rlock
      |  0xffff8800bf165ae0: &(&sighand->siglock)->rlock
      |  0xffff8800b9576a98: &p->cred_guard_mutex
      |  0xffff8800bb890a08: &(&p->alloc_lock)->rlock
      |  0xffff8800b9522a08: &(&p->alloc_lock)->rlock
      |  0xffff8800bb8aaa08: &(&p->alloc_lock)->rlock
      |  0xffff8800bba72a08: &(&p->alloc_lock)->rlock
      |  0xffff8800bf18ea08: &(&p->alloc_lock)->rlock
      |  0xffff8800b8a0d8a0: &(&ip->i_lock)->mr_lock
      |  0xffff88009bf818a0: &(&ip->i_lock)->mr_lock
      |  0xffff88004c66b8a0: &(&ip->i_lock)->mr_lock
      |  0xffff8800bb6478a0: &(shost->host_lock)->rlock
      
      v3: fixed some problems Frederic pointed out
       * better rbtree tracking in dump_threads()
       * removed printf() and used pr_info() and pr_debug()
      Signed-off-by: NHitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Jens Axboe <jens.axboe@oracle.com>
      Cc: Jason Baron <jbaron@redhat.com>
      Cc: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
      LKML-Reference: <1272863520-16179-1-git-send-email-mitake@dcl.info.waseda.ac.jp>
      Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      26242d85
    • F
      perf: Provide a new deterministic events reordering algorithm · d6b17beb
      Frederic Weisbecker 提交于
      The current events reordering algorithm is based on a heuristic that
      gets broken once we deal with a very fast flow of events.
      
      Indeed the time period based flushing is not suitable anymore
      in the following case, assuming we have a flush period of two
      seconds.
      
          CPU 0           |        CPU 1
                          |
        cnt1 timestamps   |      cnt1 timestamps
                          |
          0               |         0
          1               |         1
          2               |         2
          3               |         3
          [...]           |        [...]
          4 seconds later
      
      If we spend too much time to read the buffers (case of a lot of
      events to record in each buffers or when we have a lot of CPU buffers
      to read), in the next pass the CPU 0 buffer could contain a slice
      of several seconds of events. We'll read them all and notice we've
      reached the period to flush. In the above example we flush the first
      half of the CPU 0 buffer, then we read the CPU 1 buffer where we
      have events that were on the flush slice and then the reordering
      fails.
      
      It's simple to reproduce with:
      
      	perf lock record perf bench sched messaging
      
      To solve this, we use a new solution that doesn't rely on an
      heuristical time slice period anymore but on a deterministic basis
      based on how perf record does its job.
      
      perf record saves the buffers through passes. A pass is a tour
      on every buffers from every CPUs. This is made in order: for
      each CPU we read the buffers of every counters. So the more
      buffers we visit, the later will be the timstamps of their events.
      
      When perf record finishes a pass it records a
      PERF_RECORD_FINISHED_ROUND pseudo event.
      We record the max timestamp t found in the pass n. Assuming these
      timestamps are monotonic across cpus, we know that if a buffer
      still has events with timestamps below t, they will be all available
      and then read in the pass n + 1.
      Hence when we start to read the pass n + 2, we can safely flush every
      events with timestamps below t.
      
            ============ PASS n =================
               CPU 0         |   CPU 1
                             |
            cnt1 timestamps  |   cnt2 timestamps
                  1          |         2
                  2          |         3
                  -          |         4  <--- max recorded
      
            ============ PASS n + 1 ==============
               CPU 0         |   CPU 1
                             |
            cnt1 timestamps  |   cnt2 timestamps
                  3          |         5
                  4          |         6
                  5          |         7 <---- max recorded
      
              Flush every events below timestamp 4
      
            ============ PASS n + 2 ==============
               CPU 0         |   CPU 1
                             |
            cnt1 timestamps  |   cnt2 timestamps
                  6          |         8
                  7          |         9
                  -          |         10
      
              Flush every events below timestamp 7
              etc...
      
      It also works on perf.data versions that don't have
      PERF_RECORD_FINISHED_ROUND pseudo events. The difference is that
      the events will be only flushed in the end of the perf.data
      processing. It will then consume more memory and scale less with
      large perf.data files.
      Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      Cc: Masami Hiramatsu <mhiramat@redhat.com>
      d6b17beb
    • F
      perf: Introduce a new "round of buffers read" pseudo event · 98402807
      Frederic Weisbecker 提交于
      In order to provide a more rubust and deterministic reordering
      algorithm, we need to know when we reach a point where we just
      did a pass through over every counter buffers to read every thing
      they had.
      
      This patch introduces a new PERF_RECORD_FINISHED_ROUND pseudo event
      that only consist in an event header and doesn't need to contain
      anything.
      Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      Cc: Masami Hiramatsu <mhiramat@redhat.com>
      98402807
    • P
      perf report: Document '--call-graph' better for usage · e157eb83
      Pekka Enberg 提交于
      This patch improves 'perf report -h' output for the
      '--call-graph' command line option by enumerating the
      different output types.
      Signed-off-by: NPekka Enberg <penberg@cs.helsinki.fi>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      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>
      LKML-Reference: <1273332783-4268-1-git-send-email-penberg@cs.helsinki.fi>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      e157eb83