From: Albert Cahalan <albert@users.sf.net>
To: linux-kernel mailing list <linux-kernel@vger.kernel.org>
Cc: nickpiggin@yahoo.com.au, kenneth.w.chen@intel.com,
kernel@kolivas.org, mingo@elte.hu,
Andrew Morton OSDL <akpm@osdl.org>
Subject: Re: Default cache_hot_time value back to 10ms
Date: 07 Oct 2004 14:44:22 -0400 [thread overview]
Message-ID: <1097174661.2669.310.camel@cube> (raw)
Con Kolivas writes:
> Should it not be based on the cache flush time? We measure
> that and set the cache_decay_ticks and can base it on that.
Often one must use the time, but...
If the system goes idle for an hour, the last-run
process is still cache-hot.
Many systems let you measure cache line castouts.
Time is a very crude approximation of this.
Memory traffic is a slightly better approximation.
next reply other threads:[~2004-10-07 18:53 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-07 18:44 Albert Cahalan [this message]
[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 --
2004-10-06 0:42 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 5:52 ` Chen, Kenneth W
2004-10-06 19:27 ` Chen, Kenneth W
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
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