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From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Namhyung Kim <namhyung@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Jiri Olsa <jolsa@redhat.com>, LKML <linux-kernel@vger.kernel.org>,
	David Ahern <dsahern@gmail.com>,
	Adrian Hunter <adrian.hunter@intel.com>,
	Andi Kleen <andi@firstfloor.org>,
	Frederic Weisbecker <fweisbec@gmail.com>,
	Stephane Eranian <eranian@google.com>
Subject: Re: [PATCH 35/40] perf record: Synthesize COMM event for a command line workload
Date: Tue, 19 May 2015 13:30:35 -0300	[thread overview]
Message-ID: <20150519163035.GA19921@kernel.org> (raw)
In-Reply-To: <20150519151245.GC29162@danjae.kornet>

Em Wed, May 20, 2015 at 12:12:45AM +0900, Namhyung Kim escreveu:
> On Tue, May 19, 2015 at 11:02:20AM -0300, Arnaldo Carvalho de Melo wrote:
> > Em Tue, May 19, 2015 at 04:46:43PM +0900, Namhyung Kim escreveu:
> > > On Mon, May 18, 2015 at 09:45:35AM -0300, Arnaldo Carvalho de Melo wrote:
> > > > Em Mon, May 18, 2015 at 09:30:50AM +0900, Namhyung Kim escreveu:
> > > > > When perf creates a new child to profile, the events are enabled on
> > > > > exec().  And in this case, it doesn't synthesize any event for the
> > > > > child since they'll be generated during exec().  But there's an window
> > > > > between the enabling and the event generation.
> > > > > 
> > > > > It used to be overcome since samples are only in kernel (so we always
> > > > > have the map) and the comm is overridden by a later COMM event.
> > > > > However it won't work anymore since those samples will go to a missing
> > > > > thread now but the COMM event will create a (current) thread.  This
> > > > > leads to those early samples (like native_write_msr_safe) not having a
> > > > > comm but pid (like ':15328').
> > > >  
> > > > > So it needs to synthesize COMM event for the child explicitly before
> > > > > enabling so that it can have a correct comm.  But at this time, the
> > > > > comm will be "perf" since it's not exec-ed yet.
> > > > 
> > > > This looks reasonable, but I think it probably needs to be done
> > > > somewhere in perf_evlist__prepare_workload() or
> > > > perf_evlist__start_workload(), as this affects other tools as well, like
> > > > 'top', 'trace' and any other that may want to do this start-workload use
> > > > case.
> > > 
> > > Hmm.. I need to look at this again as it only affects on processing
> > > indexed data files which used to have a separate missing threads tree.
> > 
> > Humm, you're thinking about where you managed to reproduce the problem,
> > I am thinking outside indexing, etc, i.e. by definition we either enable
> > the event before we fork, so that we get the PERF_RECORD_FORK/COMM or we
> > synthesize it either from /proc or directly (preferred) if we decide to
> > do it after the fork/exec, right?
> 
> But as I said before, later COMM event will override thread->comm to a

But what happens for samples that take place before this "later COMM
event"? Even tho we know the COMM (we're starting the workload) we will
show just the pid, right?

Think about processing the samples with minimum delay (perf trace),
ordered by timestamp, but only ordering the head of the ring buffers,
not with a perf.data file.

- Arnaldo

> proper string as long as it can find a matching thread.  So I think it
> has no problem in the current code.
> 
> In the old version of this patchset (v3), indexing made it impossible
> for COMM event to find a matching thread since it used to have a
> separate tree for threads that have sampled before any FORK/COMM event
> came.  I think it doesn't apply to the current version anymore, I
> will check it tomorrow.
> 
> Thanks,
> Namhyung
> 
> 
> > 
> > - Arnaldo
> > 
> > > That's the reason why I didn't put it in a generic place like you
> > > said.
> > > 
> > > However I changed not to use the separate tree - the purpose of the
> > > tree was to reduce lock acquisition on thread searching but it already
> > > grabs a rwlock with thread refcounting change.
> > > 
> > > Will check whether this is still needed..
> > > 
> > > Thanks,
> > > Namhyung
> > > 
> > > 
> > > > 
> > > > I also wonder if we can't overcome this without using /proc, i.e.
> > > > actually moving the "start the workload" to just before the fork, so
> > > > that the kernel covers that as well.
> > > > 
> > > > Or, alternatively, the thread can be created without having to look at
> > > > /proc at all, but by directly creating the struct thread, with the
> > > > correct COMM, pid, etc, that we know, since we forked it, etc.

  reply	other threads:[~2015-05-19 16:30 UTC|newest]

Thread overview: 221+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-05-18  0:30 [RFC/PATCHSET 00/40] perf tools: Speed-up perf report by using multi thread (v4) Namhyung Kim
2015-05-18  0:30 ` [PATCH 01/40] perf tools: Use a software dummy event to track task/mmap events Namhyung Kim
2015-05-18  0:30 ` [PATCH 02/40] perf tools: Add rm_rf() utility function Namhyung Kim
2015-05-18  0:30 ` [PATCH 03/40] perf tools: Introduce copyfile_offset() function Namhyung Kim
2015-05-18 12:57   ` Arnaldo Carvalho de Melo
2015-05-19  6:20     ` Namhyung Kim
2015-05-20 12:24   ` [tip:perf/core] " tip-bot for Namhyung Kim
2015-05-18  0:30 ` [PATCH 04/40] perf tools: Create separate mmap for dummy tracking event Namhyung Kim
2015-05-18 18:07   ` Jiri Olsa
2015-05-19  6:24     ` Namhyung Kim
2015-05-18  0:30 ` [PATCH 05/40] perf tools: Introduce perf_evlist__mmap_track() Namhyung Kim
2015-05-18 18:09   ` Jiri Olsa
2015-05-19  6:28     ` Namhyung Kim
2015-05-18  0:30 ` [PATCH 06/40] perf tools: Add HEADER_DATA_INDEX feature Namhyung Kim
2015-05-18 18:17   ` Jiri Olsa
2015-05-19  6:34     ` Namhyung Kim
2015-05-18  0:30 ` [PATCH 07/40] perf tools: Handle indexed data file properly Namhyung Kim
2015-05-18 18:37   ` Jiri Olsa
2015-05-19  6:40     ` Namhyung Kim
2015-05-18  0:30 ` [PATCH 08/40] perf record: Add --index option for building index table Namhyung Kim
2015-05-18  0:30 ` [PATCH 09/40] perf report: Skip dummy tracking event Namhyung Kim
2015-05-18  0:30 ` [PATCH 10/40] perf tools: Introduce thread__comm(_str)_by_time() helpers Namhyung Kim
2015-05-18  0:30 ` [PATCH 11/40] perf tools: Add a test case for thread comm handling Namhyung Kim
2015-05-18 19:29   ` Jiri Olsa
2015-05-19  6:42     ` Namhyung Kim
2015-05-18  0:30 ` [PATCH 12/40] perf tools: Use thread__comm_by_time() when adding hist entries Namhyung Kim
2015-05-18  0:30 ` [PATCH 13/40] perf tools: Convert dead thread list into rbtree Namhyung Kim
2015-05-18 19:34   ` Jiri Olsa
2015-05-19  6:45     ` Namhyung Kim
2015-05-18  0:30 ` [PATCH 14/40] perf tools: Introduce machine__find*_thread_by_time() Namhyung Kim
2015-05-18 19:50   ` Jiri Olsa
2015-05-18 19:56     ` Jiri Olsa
2015-05-19  6:57     ` Namhyung Kim
2015-05-18  0:30 ` [PATCH 15/40] perf tools: Add a test case for timed thread handling Namhyung Kim
2015-05-18  0:30 ` [PATCH 16/40] perf tools: Reducing arguments of hist_entry_iter__add() Namhyung Kim
2015-05-18 12:55   ` Arnaldo Carvalho de Melo
2015-05-19  7:01     ` Namhyung Kim
2015-05-19  8:04       ` [PATCH] " Namhyung Kim
2015-05-19 14:03         ` Arnaldo Carvalho de Melo
2015-05-27 16:47         ` [tip:perf/core] perf hists: " tip-bot for Namhyung Kim
2015-05-18  0:30 ` [PATCH 17/40] perf tools: Maintain map groups list in a leader thread Namhyung Kim
2015-05-18  0:30 ` [PATCH 18/40] perf tools: Introduce thread__find_addr_location_by_time() and friends Namhyung Kim
2015-05-18  0:30 ` [PATCH 19/40] perf callchain: Use " Namhyung Kim
2015-05-18  0:30 ` [PATCH 20/40] perf tools: Add a test case for timed map groups handling Namhyung Kim
2015-05-18  0:30 ` [PATCH 21/40] perf tools: Save timestamp of a map creation Namhyung Kim
2015-05-18  0:30 ` [PATCH 22/40] perf tools: Introduce map_groups__{insert,find}_by_time() Namhyung Kim
2015-05-18  0:30 ` [PATCH 23/40] perf tools: Use map_groups__find_addr_by_time() Namhyung Kim
2015-05-18  0:30 ` [PATCH 24/40] perf tools: Add testcase for managing maps with time Namhyung Kim
2015-05-18  0:30 ` [PATCH 25/40] perf tools: Protect dso symbol loading using a mutex Namhyung Kim
2015-05-20 12:25   ` [tip:perf/core] perf symbols: " tip-bot for Namhyung Kim
2015-05-18  0:30 ` [PATCH 26/40] perf tools: Protect dso cache tree using dso->lock Namhyung Kim
2015-05-20 12:25   ` [tip:perf/core] perf symbols: Protect dso cache tree using dso-> lock tip-bot for Namhyung Kim
2015-05-18  0:30 ` [PATCH 27/40] perf tools: Protect dso cache fd with a mutex Namhyung Kim
2015-05-20 12:25   ` [tip:perf/core] " tip-bot for Namhyung Kim
2015-05-18  0:30 ` [PATCH 28/40] perf callchain: Maintain libunwind's address space in map_groups Namhyung Kim
2015-05-18  0:30 ` [PATCH 29/40] perf tools: Add dso__data_get/put_fd() Namhyung Kim
2015-05-18  0:30 ` [PATCH 30/40] perf session: Pass struct events stats to event processing functions Namhyung Kim
2015-05-18  0:30 ` [PATCH 31/40] perf hists: Pass hists struct to hist_entry_iter struct Namhyung Kim
2015-05-18  0:30 ` [PATCH 32/40] perf tools: Move BUILD_ID_SIZE definition to perf.h Namhyung Kim
2015-05-18  0:30 ` [PATCH 33/40] perf session: Separate struct machines from session Namhyung Kim
2015-05-18 12:52   ` Arnaldo Carvalho de Melo
2015-05-19  7:28     ` Namhyung Kim
2015-05-19 22:46       ` Arnaldo Carvalho de Melo
2015-05-19 23:58         ` Namhyung Kim
2015-05-28  2:39           ` [RFC 0/2] " Namhyung Kim
2015-05-28  2:39             ` [PATCH 1/2] perf tools: Introduce machines__new/delete() Namhyung Kim
2015-05-28  2:39             ` [PATCH 2/2] perf session: Separate struct machines from session Namhyung Kim
2015-05-18  0:30 ` [PATCH 34/40] perf report: Parallelize perf report using multi-thread Namhyung Kim
2015-05-19 10:12   ` Jiri Olsa
2015-05-19 14:58     ` Namhyung Kim
2015-05-18  0:30 ` [PATCH 35/40] perf record: Synthesize COMM event for a command line workload Namhyung Kim
2015-05-18 12:45   ` Arnaldo Carvalho de Melo
2015-05-19  7:46     ` Namhyung Kim
2015-05-19 14:02       ` Arnaldo Carvalho de Melo
2015-05-19 15:12         ` Namhyung Kim
2015-05-19 16:30           ` Arnaldo Carvalho de Melo [this message]
2015-05-19 19:49           ` Jiri Olsa
2015-05-19 20:18             ` Arnaldo Carvalho de Melo
2015-05-19 23:56               ` Namhyung Kim
2015-05-20  0:22                 ` Arnaldo Carvalho de Melo
2015-05-20  0:56                   ` Namhyung Kim
2015-05-20  1:16                     ` Arnaldo Carvalho de Melo
2015-05-18  0:30 ` [PATCH 36/40] perf tools: Fix progress ui to support multi thread Namhyung Kim
2015-05-18  0:30 ` [PATCH 37/40] perf report: Add --multi-thread option and config item Namhyung Kim
2015-05-18  0:30 ` [PATCH 38/40] perf session: Handle index files generally Namhyung Kim
2015-05-19 22:27   ` David Ahern
2015-05-20  0:05     ` Namhyung Kim
2015-05-20  7:20       ` [PATCH 41/40] perf report: Add --num-thread option to control number of thread Namhyung Kim
2015-05-18  0:30 ` [PATCH 39/40] perf data: Implement 'index' subcommand Namhyung Kim
2015-05-18  0:30 ` [PATCH Not-for-merge 40/40] perf tools: Disable thread refcount due to bug Namhyung Kim
2015-05-18  1:23   ` Arnaldo Carvalho de Melo
2015-05-18 12:21     ` Namhyung Kim
2015-05-18 12:30       ` Arnaldo Carvalho de Melo
  -- strict thread matches above, loose matches on Subject: below --
2015-03-03  3:07 [RFC/PATCHSET 00/38] perf tools: Speed-up perf report by using multi thread (v3) Namhyung Kim
2015-03-03  3:07 ` [PATCH 01/38] perf tools: Use a software dummy event to track task/mmap events Namhyung Kim
2015-03-03  3:07 ` [PATCH 02/38] perf tools: Add rm_rf() utility function Namhyung Kim
2015-03-03  3:07 ` [PATCH 03/38] perf tools: Introduce copyfile_offset() function Namhyung Kim
2015-03-04 14:58   ` Jiri Olsa
2015-03-03  3:07 ` [PATCH 04/38] perf tools: Create separate mmap for dummy tracking event Namhyung Kim
2015-03-03  3:07 ` [PATCH 05/38] perf tools: Introduce perf_evlist__mmap_track() Namhyung Kim
2015-03-03  3:07 ` [PATCH 06/38] perf tools: Add HEADER_DATA_INDEX feature Namhyung Kim
2015-03-03  3:07 ` [PATCH 07/38] perf tools: Handle indexed data file properly Namhyung Kim
2015-03-04 16:19   ` Jiri Olsa
2015-03-06  4:17     ` Namhyung Kim
2015-03-03  3:07 ` [PATCH 08/38] perf record: Add --index option for building index table Namhyung Kim
2015-03-05  7:56   ` Jiri Olsa
2015-03-06  4:19     ` Namhyung Kim
2015-03-03  3:07 ` [PATCH 09/38] perf report: Skip dummy tracking event Namhyung Kim
2015-03-03  3:07 ` [PATCH 10/38] perf tools: Pass session arg to perf_event__preprocess_sample() Namhyung Kim
2015-03-03 13:59   ` Arnaldo Carvalho de Melo
2015-03-03 14:18     ` Namhyung Kim
2015-03-03  3:07 ` [PATCH 11/38] perf script: Pass session arg to ->process_event callback Namhyung Kim
2015-03-03  3:07 ` [PATCH 12/38] perf tools: Introduce thread__comm_time() helpers Namhyung Kim
2015-03-03 16:28   ` Frederic Weisbecker
2015-03-04  0:02     ` Namhyung Kim
2015-03-05 16:08       ` Frederic Weisbecker
2015-03-06  4:38         ` Namhyung Kim
2015-03-06 12:48           ` Arnaldo Carvalho de Melo
2015-03-10  6:55             ` Namhyung Kim
2015-03-03  3:07 ` [PATCH 13/38] perf tools: Add a test case for thread comm handling Namhyung Kim
2015-03-03  3:07 ` [PATCH 14/38] perf tools: Use thread__comm_time() when adding hist entries Namhyung Kim
2015-03-03  3:07 ` [PATCH 15/38] perf tools: Convert dead thread list into rbtree Namhyung Kim
2015-03-03  3:07 ` [PATCH 16/38] perf tools: Introduce machine__find*_thread_time() Namhyung Kim
2015-03-03  3:07 ` [PATCH 17/38] perf tools: Add a test case for timed thread handling Namhyung Kim
2015-03-03  3:07 ` [PATCH 18/38] perf tools: Reducing arguments of hist_entry_iter__add() Namhyung Kim
2015-03-03  3:07 ` [PATCH 19/38] perf tools: Pass session to hist_entry_iter struct Namhyung Kim
2015-03-03  3:07 ` [PATCH 20/38] perf tools: Maintain map groups list in a leader thread Namhyung Kim
2015-03-03  3:07 ` [PATCH 21/38] perf tools: Introduce session__find_addr_location() and friends Namhyung Kim
2015-03-03  3:07 ` [PATCH 22/38] perf callchain: Use " Namhyung Kim
2015-03-03 14:01   ` Arnaldo Carvalho de Melo
2015-03-03  3:07 ` [PATCH 23/38] perf tools: Add a test case for timed map groups handling Namhyung Kim
2015-03-03  3:07 ` [PATCH 24/38] perf tools: Protect dso symbol loading using a mutex Namhyung Kim
2015-03-03  3:07 ` [PATCH 25/38] perf tools: Protect dso cache tree using dso->lock Namhyung Kim
2015-03-03  3:07 ` [PATCH 26/38] perf tools: Protect dso cache fd with a mutex Namhyung Kim
2015-03-03  3:07 ` [PATCH 27/38] perf callchain: Maintain libunwind's address space in map_groups Namhyung Kim
2015-03-03  3:07 ` [PATCH 28/38] perf tools: Add dso__data_get/put_fd() Namhyung Kim
2015-03-03  3:07 ` [PATCH 29/38] perf session: Pass struct events stats to event processing functions Namhyung Kim
2015-03-03  3:07 ` [PATCH 30/38] perf hists: Pass hists struct to hist_entry_iter struct Namhyung Kim
2015-03-03  3:07 ` [PATCH 31/38] perf tools: Move BUILD_ID_SIZE definition to perf.h Namhyung Kim
2015-03-03  3:07 ` [PATCH 32/38] perf report: Parallelize perf report using multi-thread Namhyung Kim
2015-03-03  3:07 ` [PATCH 33/38] perf tools: Add missing_threads rb tree Namhyung Kim
2015-03-03  3:07 ` [PATCH 34/38] perf record: Synthesize COMM event for a command line workload Namhyung Kim
2015-03-03  3:07 ` [PATCH 35/38] perf tools: Fix progress ui to support multi thread Namhyung Kim
2015-03-03  3:07 ` [PATCH 36/38] perf report: Add --multi-thread option and config item Namhyung Kim
2015-03-03  3:07 ` [PATCH 37/38] perf session: Handle index files generally Namhyung Kim
2015-03-03  3:07 ` [PATCH 38/38] perf data: Implement 'index' subcommand Namhyung Kim
2015-01-29  8:06 [RFC/PATCHSET 00/42] perf tools: Speed-up perf report by using multi thread (v2) Namhyung Kim
2015-01-29  8:06 ` [PATCH 01/42] perf tools: Support to read compressed module from build-id cache Namhyung Kim
2015-01-30 14:32   ` Jiri Olsa
2015-02-02 15:03     ` Namhyung Kim
2015-01-30 18:33   ` [tip:perf/core] perf symbols: " tip-bot for Namhyung Kim
2015-01-29  8:06 ` [PATCH 02/42] perf tools: Do not use __perf_session__process_events() directly Namhyung Kim
2015-01-30 18:32   ` [tip:perf/core] " tip-bot for Namhyung Kim
2015-01-29  8:06 ` [PATCH 03/42] perf record: Show precise number of samples Namhyung Kim
2015-01-30 18:32   ` [tip:perf/core] " tip-bot for Namhyung Kim
2015-01-29  8:06 ` [PATCH 04/42] perf header: Set header version correctly Namhyung Kim
2015-01-30 18:33   ` [tip:perf/core] " tip-bot for Namhyung Kim
2015-01-29  8:06 ` [PATCH 05/42] perf tools: Set attr.task bit for a tracking event Namhyung Kim
2015-01-30 18:33   ` [tip:perf/core] perf evsel: " tip-bot for Namhyung Kim
2015-01-29  8:06 ` [PATCH 06/42] perf tools: Use a software dummy event to track task/mmap events Namhyung Kim
2015-01-29  8:06 ` [PATCH 07/42] perf tools: Use perf_data_file__fd() consistently Namhyung Kim
2015-01-30 18:33   ` [tip:perf/core] " tip-bot for Namhyung Kim
2015-01-29  8:06 ` [PATCH 08/42] perf tools: Add rm_rf() utility function Namhyung Kim
2015-01-30 15:02   ` Jiri Olsa
2015-05-20 12:24     ` [tip:perf/core] " tip-bot for Namhyung Kim
2015-01-29  8:06 ` [PATCH 09/42] perf tools: Introduce copyfile_offset() function Namhyung Kim
2015-01-29  8:06 ` [PATCH 10/42] perf tools: Create separate mmap for dummy tracking event Namhyung Kim
2015-01-29  8:06 ` [PATCH 11/42] perf tools: Introduce perf_evlist__mmap_track() Namhyung Kim
2015-01-29  8:06 ` [PATCH 12/42] perf tools: Add HEADER_DATA_INDEX feature Namhyung Kim
2015-01-29  8:06 ` [PATCH 13/42] perf tools: Handle indexed data file properly Namhyung Kim
2015-01-29  8:06 ` [PATCH 14/42] perf record: Add --index option for building index table Namhyung Kim
2015-02-01 18:06   ` Jiri Olsa
2015-02-02  8:34     ` Adrian Hunter
2015-02-02  9:15       ` Jiri Olsa
2015-02-02  9:52         ` Adrian Hunter
2015-02-02 10:05           ` Jiri Olsa
2015-02-02 12:07             ` Adrian Hunter
2015-02-02 12:13               ` Jiri Olsa
2015-02-02 14:56                 ` Namhyung Kim
2015-02-02 17:30                   ` Jiri Olsa
2015-02-03  8:42                     ` Adrian Hunter
2015-01-29  8:06 ` [PATCH 15/42] perf report: Skip dummy tracking event Namhyung Kim
2015-01-29  8:06 ` [PATCH 16/42] perf tools: Pass session arg to perf_event__preprocess_sample() Namhyung Kim
2015-01-29  8:06 ` [PATCH 17/42] perf script: Pass session arg to ->process_event callback Namhyung Kim
2015-01-29  8:06 ` [PATCH 18/42] perf tools: Introduce thread__comm_time() helpers Namhyung Kim
2015-01-29  8:07 ` [PATCH 19/42] perf tools: Add a test case for thread comm handling Namhyung Kim
2015-01-29  8:07 ` [PATCH 20/42] perf tools: Use thread__comm_time() when adding hist entries Namhyung Kim
2015-01-29  8:07 ` [PATCH 21/42] perf tools: Convert dead thread list into rbtree Namhyung Kim
2015-01-29  8:07 ` [PATCH 22/42] perf tools: Introduce machine__find*_thread_time() Namhyung Kim
2015-01-29  8:07 ` [PATCH 23/42] perf tools: Add a test case for timed thread handling Namhyung Kim
2015-01-29  8:07 ` [PATCH 24/42] perf tools: Maintain map groups list in a leader thread Namhyung Kim
2015-01-29  8:07 ` [PATCH 25/42] perf tools: Introduce thread__find_addr_location_time() and friends Namhyung Kim
2015-01-29  8:07 ` [PATCH 26/42] perf tools: Add a test case for timed map groups handling Namhyung Kim
2015-01-29  8:07 ` [PATCH 27/42] perf tools: Protect dso symbol loading using a mutex Namhyung Kim
2015-01-29 12:34   ` Arnaldo Carvalho de Melo
2015-01-29 12:48     ` Namhyung Kim
2015-01-29  8:07 ` [PATCH 28/42] perf tools: Protect dso cache tree using dso->lock Namhyung Kim
2015-01-29  8:07 ` [PATCH 29/42] perf tools: Protect dso cache fd with a mutex Namhyung Kim
2015-01-29 12:31   ` Arnaldo Carvalho de Melo
2015-01-29 13:19     ` Namhyung Kim
2015-01-29 16:23       ` Arnaldo Carvalho de Melo
2015-01-30  0:51         ` Namhyung Kim
2015-01-29  8:07 ` [PATCH 30/42] perf session: Pass struct events stats to event processing functions Namhyung Kim
2015-01-29  8:07 ` [PATCH 31/42] perf hists: Pass hists struct to hist_entry_iter functions Namhyung Kim
2015-01-29  8:07 ` [PATCH 32/42] perf tools: Move BUILD_ID_SIZE definition to perf.h Namhyung Kim
2015-01-29  8:07 ` [PATCH 33/42] perf report: Parallelize perf report using multi-thread Namhyung Kim
2015-01-29  8:07 ` [PATCH 34/42] perf tools: Add missing_threads rb tree Namhyung Kim
2015-01-29  8:07 ` [PATCH 35/42] perf record: Synthesize COMM event for a command line workload Namhyung Kim
2015-01-29  8:07 ` [PATCH 36/42] perf tools: Fix progress ui to support multi thread Namhyung Kim
2015-01-29  8:07 ` [PATCH 37/42] perf report: Add --multi-thread option and config item Namhyung Kim
2015-01-29  8:07 ` [PATCH 38/42] perf session: Handle index files generally Namhyung Kim
2015-01-29  8:07 ` [PATCH 39/42] perf tools: Convert lseek + read to pread Namhyung Kim
2015-01-30 18:34   ` [tip:perf/core] perf symbols: " tip-bot for Namhyung Kim
2015-01-29  8:07 ` [PATCH 40/42] perf callchain: Save eh/debug frame offset for dwarf unwind Namhyung Kim
2015-01-29 12:38   ` Arnaldo Carvalho de Melo
2015-01-29 13:23     ` Namhyung Kim
2015-01-29 19:22   ` Arnaldo Carvalho de Melo
2015-01-30 18:32   ` [tip:perf/core] perf callchain: Cache eh/ debug " tip-bot for Namhyung Kim
2015-01-29  8:07 ` [PATCH 41/42] perf tools: Add new perf data command Namhyung Kim
2015-01-29  8:07 ` [PATCH 42/42] perf data: Implement 'index' subcommand Namhyung Kim
2015-01-29 19:56 ` [RFC/PATCHSET 00/42] perf tools: Speed-up perf report by using multi thread (v2) Arnaldo Carvalho de Melo

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