Re: regression with poll(2)
From: Andrew Morton <akpm@linux-foundation.org>
Date: 2012-08-20 23:21:07
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ceph-devel, lkml
On Mon, 20 Aug 2012 11:30:59 +0200 Eric Dumazet [off-list ref] wrote:
On Mon, 2012-08-20 at 10:04 +0100, Mel Gorman wrote:quoted
Can the following patch be tested please? It is reported to fix an fio regression that may be similar to what you are experiencing but has not been picked up yet. -This seems to help here. Boot your machine with "mem=768M" or a bit less depending on your setup, and try a netperf. -> before patch : # netperf MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to localhost.localdomain () port 0 AF_INET Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 16384 14.00 6.05 -> after patch : Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 16384 10.00 18509.73
"seem to help"? Was previous performance fully restored?