From: Peter Zijlstra <peterz@infradead.org>
To: John Kacur <jkacur@redhat.com>
Cc: Yong Zhang <yong.zhang@windriver.com>,
LKML <linux-kernel@vger.kernel.org>,
linux-rt-users <linux-rt-users@vger.kernel.org>,
Sven-Thorsten Dietrich <thebigcorporation@gmail.com>,
Clark Williams <williams@redhat.com>,
"Luis Claudio R. Goncalves" <lgoncalv@redhat.com>,
Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
Gregory Haskins <ghaskins@novell.com>
Subject: Re: [PATCH] lockdep: Add nr_save_trace_invocations counter
Date: Fri, 23 Apr 2010 10:05:15 +0200 [thread overview]
Message-ID: <1272009915.1646.25.camel@laptop> (raw)
In-Reply-To: <alpine.LFD.2.00.1004230907050.4151@localhost>
On Fri, 2010-04-23 at 09:24 +0200, John Kacur wrote:
> direct dependencies: 8752 [max: 16384]
> I have
> stack-trace invocations: 10888
> from the same run.
>
> Still trying to figure out what the meaning is of that though to be
> honest.
>
> Here is a portion of the lockdep_stats, with all of the new fields and the
> redundant ones.
>
> stack-trace invocations: 10888
> LOCK_USED_IN_HARDIRQ: 15
> LOCK_USED_IN_HARDIRQ_READ: 0
> LOCK_ENABLED_HARDIRQ: 543
> LOCK_ENABLED_HARDIRQ_READ: 28
> LOCK_USED_IN_SOFTIRQ: 0
> LOCK_USED_IN_SOFTIRQ_READ: 0
> LOCK_ENABLED_SOFTIRQ: 543
> LOCK_ENABLED_SOFTIRQ_READ: 28
> LOCK_USED_IN_RECLAIM_FS: 5
> LOCK_USED_IN_RECLAIM_FS_READ: 0
> LOCK_ENABLED_RECLAIM_FS: 95
> LOCK_ENABLED_RECLAIM_FS_READ: 8
> LOCK_USED: 871
8752+871+8+95+5+28+543+28+543+15=10888
So you get a stack-trace for each direct-dependency, and you get a
stack-trace for each LOCK_state, the sum seems to match the total
invocations.
Non of these numbers look strange..
next prev parent reply other threads:[~2010-04-23 8:05 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-22 20:15 [PATCH] lockdep: Add nr_save_trace_invocations counter John Kacur
2010-04-23 2:58 ` Yong Zhang
2010-04-23 6:52 ` Peter Zijlstra
2010-04-23 8:03 ` Yong Zhang
2010-04-23 7:24 ` John Kacur
2010-04-23 8:00 ` Yong Zhang
2010-04-23 8:05 ` Peter Zijlstra [this message]
2010-04-23 8:31 ` John Kacur
2010-04-23 8:31 ` John Kacur
2010-04-23 8:49 ` Yong Zhang
2010-04-23 9:40 ` John Kacur
2010-04-23 13:40 ` [PATCH] lockdep: reduce stack_trace usage Yong Zhang
2010-04-26 6:24 ` Yong Zhang
2010-05-03 12:11 ` Peter Zijlstra
2010-05-04 6:37 ` Yong Zhang
2010-05-04 6:57 ` [PATCH V2] " Yong Zhang
2010-05-04 12:56 ` Peter Zijlstra
2010-05-05 1:31 ` Yong Zhang
2010-05-05 9:09 ` Peter Zijlstra
2010-05-05 9:18 ` Yong Zhang
2010-05-07 18:40 ` [tip:core/locking] lockdep: Reduce " tip-bot for Yong Zhang
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