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Message-ID: <1345455059.5158.302.camel@edumazet-glaptop> Date: Mon, 20 Aug 2012 11:30:59 +0200 From: Eric Dumazet <eric.dumazet@...il.com> To: Mel Gorman <mgorman@...e.de> Cc: Sage Weil <sage@...tank.com>, davem@...emloft.net, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, ceph-devel@...r.kernel.org, neilb@...e.de, a.p.zijlstra@...llo.nl, michaelc@...wisc.edu, emunson@...bm.net, sebastian@...akpoint.cc, cl@...ux.com, akpm@...ux-foundation.org, torvalds@...ux-foundation.org Subject: Re: regression with poll(2) On Mon, 2012-08-20 at 10:04 +0100, Mel Gorman wrote: > 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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