linux-kernel - Re: [PATCH] tracing/lockdep: report the time waited for a lock

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Message-Id: <1243521283.6645.0.camel@laptop>
Date:	Thu, 28 May 2009 16:34:43 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] tracing/lockdep: report the time waited for a lock

On Thu, 2009-05-28 at 10:32 -0400, Steven Rostedt wrote:

> > +	TP_STRUCT__entry(
> > +		__field(const char *, name)
> > +		__field(unsigned long, wait_usec)
> > +		__field(unsigned long, wait_nsec_rem)
> > +	),
> > +	TP_fast_assign(
> > +		__entry->name = lock->name;
> > +		__entry->wait_nsec_rem = do_div(waittime, NSEC_PER_USEC);
> 
> I know this is already accepted, but can you move the do_div into the 
> print section.

please do. Just fold those wait_* fields into a single u64 nsec one.

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