From: Ingo Molnar <mingo@elte.hu>
To: Mike Galbraith <efault@gmx.de>
Cc: Steven Cole <elenstev@mesatop.com>,
Ed Tomlinson <tomlins@cam.org>, Andrew Morton <akpm@digeo.com>,
Linux Kernel <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org
Subject: Re: 2.5.65-mm2
Date: Fri, 21 Mar 2003 07:16:53 +0100 (CET) [thread overview]
Message-ID: <Pine.LNX.4.44.0303210710490.2533-100000@localhost.localdomain> (raw)
In-Reply-To: <5.2.0.9.2.20030320194530.01985440@pop.gmx.net>
On Thu, 20 Mar 2003, Mike Galbraith wrote:
> [...] Virgin .65 is also subject to the positive feedback loop (irman's
> process load is worst case methinks, and rounding down only ~hides it).
there's no positive feedback loop. What might happen is that in 2.5.65 we
now distribute the bonus timeslices more widely (the backboost thing), so
certain workloads might be rated more interactive. But we never give away
timeslices that were not earned the hard way (ie. via actual sleeping).
i've attached a patch that temporarily turns off the back-boost - does
that have any measurable impact? [please apply this to -mm1, i do think
the timeslice-granularity change in -mm1 (-D3) is something we really
want.]
Ingo
--- kernel/sched.c.orig 2003-03-21 07:14:02.000000000 +0100
+++ kernel/sched.c 2003-03-21 07:15:08.000000000 +0100
@@ -365,7 +365,7 @@
* tasks.
*/
if (sleep_avg > MAX_SLEEP_AVG) {
- if (!in_interrupt()) {
+ if (0 && !in_interrupt()) {
sleep_avg += current->sleep_avg - MAX_SLEEP_AVG;
if (sleep_avg > MAX_SLEEP_AVG)
sleep_avg = MAX_SLEEP_AVG;
--
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next prev parent reply other threads:[~2003-03-21 6:16 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-19 9:21 2.5.65-mm2 Andrew Morton
2003-03-19 10:07 ` 2.5.65-mm2 Alexander Hoogerhuis
2003-03-19 10:16 ` 2.5.65-mm2 Alexander Hoogerhuis
2003-03-19 19:51 ` 2.5.65-mm2 Steven Cole
2003-03-19 20:10 ` 2.5.65-mm2 Andrew Morton
2003-03-19 20:57 ` 2.5.65-mm2 Steven P. Cole
2003-03-19 22:02 ` 2.5.65-mm2 Steven P. Cole
2003-03-20 0:33 ` 2.5.65-mm2 Andrew Morton
2003-03-19 23:45 ` 2.5.65-mm2 Steven P. Cole
2003-03-20 4:27 ` 2.5.65-mm2 Ed Tomlinson
2003-03-20 5:04 ` 2.5.65-mm2 Steven Cole
2003-03-20 14:36 ` 2.5.65-mm2 Steven Cole
2003-03-20 19:48 ` 2.5.65-mm2 Mike Galbraith
2003-03-20 20:12 ` 2.5.65-mm2 Steven P. Cole
2003-03-20 21:07 ` 2.5.65-mm2 Mike Galbraith
2003-03-20 21:15 ` 2.5.65-mm2 Steven P. Cole
2003-03-21 5:20 ` 2.5.65-mm2 Mike Galbraith
2003-03-21 6:06 ` 2.5.65-mm2 Ingo Molnar
2003-03-21 6:16 ` Ingo Molnar [this message]
[not found] ` <Pine.LNX.4.44.0303210710490.2533-100000@localhost.localdom ain>
2003-03-22 19:50 ` 2.5.65-mm2 Mike Galbraith
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