From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <39628664.7756172A@norran.net> Date: Wed, 05 Jul 2000 02:50:45 +0200 From: Roger Larsson MIME-Version: 1.0 Subject: Re: [PATCH] latency improvements, one reschedule moved References: <395D520C.F16DD7D6@norran.net> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Linus Torvalds , "linux-kernel@vger.rutgers.edu" , "linux-mm@kvack.org" , "linux-audio-dev@ginette.musique.umontreal.ca" List-ID: Hi Linus, Cleaned up and corrected some bugs... (memory_pressure... ! unintended reschedule removed) Sadly the performance went down - slightly. Latency looks even nicer. Still some spikes. [sync and mmap002 behaviour not corrected] /RogerL Roger Larsson wrote: > > Hi Linus, > > [patch against linux-2.4.0-test3-pre2] > > I cleaned up kswapd and moved its reschedule point. > Disk performance is close to the same. > Latencies have improved a lot (tested with Bennos latencytest) > > * sync is still problematic > * mmap002 (Quintinela) still gives a 212 ms latency > (compared to 423 ms for the unpatched...) > * other disk related latencies are down under 30 ms. > (streaming read, copy, write) > * the number of overruns has dropped considerably! > (running 4 buffers with a deadline of 23 ms) > > /RogerL > > -- > Home page: > http://www.norran.net/nra02596/ > > ------------------------------------------------------------------------ > Name: patch-2.4.0-test3-pre2-vmscan.latency.2 > patch-2.4.0-test3-pre2-vmscan.latency.2 Type: Plain Text (text/plain) > Encoding: 7bit -- Home page: http://www.norran.net/nra02596/ -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux.eu.org/Linux-MM/