From: Peter Zijlstra <peterz@infradead.org>
To: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
Cc: linux-kernel@vger.kernel.org, mingo@elte.hu, paulus@samba.org,
fweisbec@gmail.com, tglx@linutronix.de, gregkh@suse.de
Subject: Re: [PATCH] Add type of locks to lock trace events
Date: Thu, 28 Jan 2010 11:21:53 +0100 [thread overview]
Message-ID: <1264674113.4283.2086.camel@laptop> (raw)
In-Reply-To: <1264485404-6410-1-git-send-email-mitake@dcl.info.waseda.ac.jp>
On Tue, 2010-01-26 at 14:56 +0900, Hitoshi Mitake wrote:
> # Sorry, I wrote wrong Cc address. Previous mail was rejected by mailer-daemon.
> # This is second time sending, if you already received this, please discard it...
>
> There's no need to add any member to lockdep_map
> for adding information of type of locks to lock trace events.
>
> Example of perf trace:
> | init-0 [001] 335.078670: lock_acquired: 0xffff8800059d6bd8 &rq->lock kernel/lockdep.c:2973 (0 ns)
> | rb_consumer-424 [001] 335.078673: lock_acquire: 0xffff8800059d6bd8 1 &rq->lock kernel/lockdep.c:2973
> | # ^ &rq->lock is spin lock!
> | rb_consumer-424 [001] 335.078677: lock_acquire: 0xffff8800bba5e8e8 1 buffer->reader_lock_key kernel/trace/ring_
> | rb_consumer-424 [001] 335.078679: lock_acquired: 0xffff8800bba5e8e8 buffer->reader_lock_key kernel/trace/ring_b
> | rb_consumer-424 [001] 335.078684: lock_acquire: 0xffff8800059d12e8 1 &q->lock kernel/smp.c:83
>
> Of course, as you told, type of lock dealing with is clear for human.
> But it is not clear for programs like perf lock.
>
> What I want to do is limiting types of lock focus on.
> e.g. perf lock prof --type spin,rwlock
>
> How do you think, Peter?
I still don't see the use for it, surely you're going to be familiar
with the code if you're looking at lock statistics?
next prev parent reply other threads:[~2010-01-28 10:22 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-16 3:28 [PATCH 1/2] perf: Add util/include/linuxhash.h to include hash.h of kernel Hitoshi Mitake
2009-12-16 3:28 ` [PATCH 2/2] perf lock: Fix output of tracing lock events Hitoshi Mitake
2009-12-16 8:19 ` [tip:perf/lock] " tip-bot for Hitoshi Mitake
2009-12-17 8:50 ` [PATCH 2/2] " Ingo Molnar
2009-12-17 9:24 ` Peter Zijlstra
2009-12-17 10:09 ` Ingo Molnar
2009-12-17 10:26 ` Peter Zijlstra
2009-12-17 10:51 ` Ingo Molnar
2009-12-26 13:43 ` Hitoshi Mitake
2009-12-28 10:01 ` Peter Zijlstra
2009-12-31 13:24 ` Hitoshi Mitake
2010-01-07 10:38 ` Hitoshi Mitake
2010-01-07 10:39 ` [PATCH 0/5] lockdep: Add information of file and line to lockdep_map Hitoshi Mitake
2010-01-13 9:52 ` Peter Zijlstra
2010-01-13 10:09 ` Ingo Molnar
2010-01-16 13:01 ` Hitoshi Mitake
2010-01-18 7:20 ` Peter Zijlstra
2010-01-26 5:56 ` [PATCH] Add type of locks to lock trace events Hitoshi Mitake
2010-01-28 10:21 ` Peter Zijlstra [this message]
2010-01-29 17:29 ` Frederic Weisbecker
2010-01-29 17:41 ` Peter Zijlstra
2010-01-29 22:12 ` Frederic Weisbecker
2010-02-24 9:02 ` [PATCH] Separate lock events with types Hitoshi Mitake
2010-03-26 23:33 ` Frederic Weisbecker
2010-04-05 10:37 ` Hitoshi Mitake
2010-04-06 8:26 ` Peter Zijlstra
2010-04-06 9:44 ` Frederic Weisbecker
2010-01-07 10:39 ` [PATCH 1/5] lockdep: Add file and line to initialize sequence of spin and rw lock Hitoshi Mitake
2010-01-07 10:39 ` [PATCH 2/5] lockdep: Add file and line to initialize sequence of rwsem Hitoshi Mitake
2010-01-07 10:39 ` [PATCH 3/5] " Hitoshi Mitake
2010-01-07 10:39 ` [PATCH 4/5] lockdep: Add file and line to initialize sequence of mutex Hitoshi Mitake
2010-01-07 10:39 ` [PATCH 5/5] lockdep: Fix the way to initialize class_mutex for information of file and line Hitoshi Mitake
2010-01-13 10:00 ` Ingo Molnar
2010-01-13 23:17 ` Greg KH
2010-01-13 23:19 ` Greg KH
2010-01-16 12:55 ` Hitoshi Mitake
2009-12-16 8:18 ` [tip:perf/lock] perf: Add util/include/linuxhash.h to include hash.h of kernel tip-bot for Hitoshi Mitake
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