From: "Chen, Kenneth W" <kenneth.w.chen@intel.com>
To: "'Andrew Morton'" <akpm@osdl.org>,
"Nick Piggin" <nickpiggin@yahoo.com.au>
Cc: <mingo@redhat.com>, <linux-kernel@vger.kernel.org>
Subject: RE: Default cache_hot_time value back to 10ms
Date: Wed, 6 Oct 2004 12:27:44 -0700 [thread overview]
Message-ID: <200410061927.i96JRU607630@unix-os.sc.intel.com> (raw)
In-Reply-To: <20041005215116.3b0bd028.akpm@osdl.org>
Andrew Morton wrote on Tuesday, October 05, 2004 9:51 PM
> > Nick Piggin <nickpiggin@yahoo.com.au> wrote:
> > I'd say it is probably too low level to be a useful tunable (although
> > for testing I guess so... but then you could have *lots* of parameters
> > tunable).
>
> This tunable caused an 11% performance difference in (I assume) TPCx.
> That's a big deal, and people will want to diddle it.
>
> If one number works optimally for all machines and workloads then fine.
>
> But yes, avoiding a tunable would be nice, but we need a tunable to work
> out whether we can avoid making it tunable ;)
>
> Not that I'm soliciting patches or anything. I'll duck this one for now.
Andrew, can I safely interpret this response as you are OK with having
cache_hot_time set to 10 ms for now? And you will merge this change for
2.6.9? I think Ingo and Nick are both OK with that change as well. Thanks.
- Ken
next prev parent reply other threads:[~2004-10-06 19:28 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-06 0:42 Default cache_hot_time value back to 10ms Chen, Kenneth W
2004-10-06 0:47 ` Con Kolivas
2004-10-06 1:02 ` Nick Piggin
2004-10-06 0:58 ` Nick Piggin
2004-10-06 3:55 ` Andrew Morton
2004-10-06 4:30 ` Nick Piggin
2004-10-06 4:51 ` Andrew Morton
2004-10-06 5:00 ` Nick Piggin
2004-10-06 5:09 ` Andrew Morton
2004-10-06 5:21 ` Nick Piggin
2004-10-06 5:33 ` Andrew Morton
2004-10-06 5:46 ` Nick Piggin
2004-10-06 6:19 ` new dev model (was Re: Default cache_hot_time value back to 10ms) Jeff Garzik
2004-10-06 6:39 ` Andrew Morton
2004-10-06 8:56 ` Paolo Ciarrocchi
2004-10-06 9:44 ` bert hubert
2004-10-06 14:00 ` Andries Brouwer
2004-10-06 19:40 ` Jeff Garzik
2004-10-06 19:48 ` Jeff Garzik
2004-10-06 19:58 ` Jeff Garzik
2004-10-06 20:37 ` Geert Uytterhoeven
2004-10-07 1:08 ` Jeff Garzik
2004-10-07 0:02 ` Matt Mackall
2004-10-06 9:23 ` Ingo Molnar
2004-10-06 9:57 ` Paolo Ciarrocchi
2004-10-06 19:33 ` Jeff Garzik
2004-10-06 22:23 ` Martin J. Bligh
2004-10-06 5:52 ` Default cache_hot_time value back to 10ms Chen, Kenneth W
2004-10-06 19:27 ` Chen, Kenneth W [this message]
2004-10-06 19:39 ` Andrew Morton
2004-10-06 20:38 ` Chen, Kenneth W
2004-10-06 20:43 ` Andrew Morton
2004-10-06 23:14 ` Chen, Kenneth W
2004-10-07 2:26 ` Nick Piggin
2004-10-07 6:29 ` Ingo Molnar
2004-10-07 7:08 ` Jeff Garzik
2004-10-07 7:26 ` Ingo Molnar
2004-10-06 20:50 ` Ingo Molnar
2004-10-06 21:03 ` Chen, Kenneth W
2004-10-06 7:48 ` Ingo Molnar
2004-10-06 17:18 ` Chen, Kenneth W
2004-10-06 19:55 ` Ingo Molnar
2004-10-06 22:46 ` Peter Williams
2004-10-06 13:29 ` [patch] sched: auto-tuning task-migration Ingo Molnar
2004-10-06 13:44 ` Nick Piggin
2004-10-06 17:49 ` Chen, Kenneth W
2004-10-06 20:04 ` Ingo Molnar
2004-10-06 21:18 ` Chen, Kenneth W
2004-10-07 6:10 ` Ingo Molnar
2005-02-21 5:08 ` Paul Jackson
[not found] <200410071028.01931.habanero@us.ibm.com>
2004-10-07 15:58 ` Default cache_hot_time value back to 10ms Andrew Theurer
2004-10-08 9:47 ` Nick Piggin
2004-10-08 14:11 ` Andrew Theurer
-- strict thread matches above, loose matches on Subject: below --
2004-10-07 18:44 Albert Cahalan
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