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From: Thomas Gleixner <tglx@linutronix.de>
To: Ashwin Chaugule <ashwinc@codeaurora.org>
Cc: linux-kernel@vger.kernel.org, mingo@redhat.com
Subject: Re: [RFC] [PATCH 1/1] hrtimers: Cache next hrtimer
Date: Fri, 28 Aug 2009 20:19:12 +0200 (CEST)	[thread overview]
Message-ID: <alpine.LFD.2.00.0908282005410.19335@localhost.localdomain> (raw)
In-Reply-To: <4A98070D.1050308@codeaurora.org>

On Fri, 28 Aug 2009, Ashwin Chaugule wrote:
> Thomas Gleixner wrote:
> Avg startup time 26.4 (10 runs) same as last run.
> 
> total_calls is again equal to cache_hits ... Its been a while since I wrote my
> patch. I'll need to look deeper to see if I've done something more. B)
> Just to make sure, I ran my patch again, I clearly see cache_hits is always
> less than total_calls.

Hmm. I'd really like to know why that's behaving different. 

Usually there are only timers in the CLOCK_MONOTONIC base during
boot. CLOCK_REALTIME base should be empty most of the time. If my
theory is correct then the number of reprogram events is correct as
well because base[MONOTONIC]->first is always the one which armed the
timer.

Can you add some debug which tells us to which base the removed timer
belongs ?

Thanks,

	tglx

  reply	other threads:[~2009-08-28 18:19 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-08-27 21:51 [RFC] [PATCH 1/1] hrtimers: Cache next hrtimer Ashwin Chaugule
2009-08-27 21:56 ` Ashwin Chaugule
2009-08-27 22:51   ` Thomas Gleixner
2009-08-27 23:09     ` Ashwin Chaugule
2009-08-27 23:16       ` Thomas Gleixner
2009-08-28  5:56         ` Ashwin Chaugule
2009-08-28 11:17           ` Thomas Gleixner
2009-08-28 16:34             ` Ashwin Chaugule
2009-08-28 18:19               ` Thomas Gleixner [this message]
2009-08-28 20:27                 ` Ashwin Chaugule
2009-08-30  6:06                 ` Ashwin Chaugule
2009-08-30  8:36                   ` Thomas Gleixner
2009-08-31  4:17                     ` Ashwin Chaugule
2009-08-31  7:08                       ` Thomas Gleixner
2009-09-01  3:13                         ` Ashwin Chaugule
2009-09-03 17:48                         ` Ashwin Chaugule
2009-09-15  9:09                           ` [tip:timers/core] hrtimer: Eliminate needless reprogramming of clock events device tip-bot for Ashwin Chaugule
2009-09-15 15:19                           ` tip-bot for Ashwin Chaugule

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