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    SubjectRe: [Devel] [PATCH 0/7] Profiling sleep times (v3)
    Em Tue, Dec 06, 2011 at 11:15:07AM +0400, Andrey Vagin escreveu:
    > Hello Arnaldo,
    >
    > I found, that you commit patches for perf. Could you review this part?
    >
    > Arun Sharma said, that the second versions of patches works ok for him.
    > (Arun is the first user of this functionality after me.)

    I'm going to check if the patches still apply and then review,

    - Arnaldo

    > Thanks.
    >
    > On 11/28/2011 01:03 PM, Andrew Vagin wrote:
    > >Do you want to know where your code waits locks for a long time?
    > >Yes! It's for you. This feature helps you to find bottlenecks.
    > >
    > >It's not artificial task. Once one of my colleague was investigating a
    > >scalability problem. He pressed sysrq-t some times and tried to merge
    > >call-chains by hand. But perf can do that.
    > >
    > >Problem:
    > >The problem is that events sched_stat_* contain call-chains of
    > >non-target tasks.
    > >About month ago I sent series of patches:
    > >
    > >[PATCH 0/3] trace: add ability to collect call chains of non current task.
    > >
    > >Peter and Frederic explained me, that this solve isn't good and will be
    > >better to make it in userspace.
    > >
    > >Now it's in userspace. This series expands "perf inject" to be able to
    > >merge sched_switch events and sched_stat* events. sched_switch events
    > >contain correct call-chains and sched_stat contains a correct time
    > >slices.
    > >
    > >v2:
    > >* Removed all known issues. Now it works completely.
    > >* Improved usability of sched-stat scripts according with Arun's comments.
    > >v3: fixed accoding to comments from David Ahem
    > >
    > >Andrew Vagin (7):
    > > perf: use event_name() to get an event name
    > > perf: add ability to record event period
    > > perf: add ability to change event according to sample (v2)
    > > perf: teach "perf inject" to work with files
    > > perf: teach perf inject to merge sched_stat_* and sched_switch events
    > > perf: add scripts for profiling sleep times (v2)
    > > event: add tracepoint for accounting block time
    > >
    > > include/trace/events/sched.h | 7 ++
    > > kernel/sched_fair.c | 2 +
    > > tools/perf/builtin-inject.c | 120 ++++++++++++++++++++++-
    > > tools/perf/builtin-record.c | 5 +
    > > tools/perf/scripts/python/bin/sched-stat-record | 65 ++++++++++++
    > > tools/perf/scripts/python/bin/sched-stat-report | 5 +
    > > tools/perf/util/event.h | 2 +
    > > tools/perf/util/evsel.c | 74 ++++++++++++++
    > > tools/perf/util/header.c | 2 +-
    > > tools/perf/util/session.h | 9 ++
    > > 10 files changed, 288 insertions(+), 3 deletions(-)
    > > create mode 100644 tools/perf/scripts/python/bin/sched-stat-record
    > > create mode 100644 tools/perf/scripts/python/bin/sched-stat-report
    > >
    > >_______________________________________________
    > >Devel mailing list
    > >Devel@openvz.org
    > >https://openvz.org/mailman/listinfo/devel


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