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Message-Id: <20070503202111.667c9b14.akpm@linux-foundation.org> Date: Thu, 3 May 2007 20:21:11 -0700 From: Andrew Morton <akpm@...ux-foundation.org> To: Christoph Lameter <clameter@....com> Cc: linux-kernel@...r.kernel.org Subject: Re: Remove constructor from buffer_head On Thu, 3 May 2007 20:08:41 -0700 (PDT) Christoph Lameter <clameter@....com> wrote: > Performance tests show a slight improvements in netperf (not a > strong case for a performance improvement but removing the > constructor has definitely no negative impact so why keep > this around?). > > TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to localhost (127.0.0.1) port 0 AF_INET > Recv Send Send > Socket Socket Message Elapsed > Size Size Size Time Throughput > bytes bytes bytes secs. 10^6bits/sec > > Before: > 87380 16384 16384 10.01 6026.04 > 87380 16384 16384 10.01 5992.17 > 87380 16384 16384 10.01 6071.23 > > After: > 87380 16384 16384 10.01 6090.20 > 87380 16384 16384 10.01 6078.3 > 87380 16384 16384 10.00 6013.52 How could a filesystem change affect networking performance? The change looks nice, but I'd microbenchmark it with a write-to-ext2-on-ramdisk or something like that. - 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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