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On Thu, 3 May 2007 20:34:48 -0700 (PDT) Christoph Lameter <clameter@sgi.com> wrote: > On Thu, 3 May 2007, Andrew Morton wrote: > > > On Thu, 3 May 2007 20:08:41 -0700 (PDT) Christoph Lameter <clameter@sgi.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. > > Hmmmm.. I was told in another thread that this is the most frequently used > slab for this benchmark That would be hair-raising ;) I suspect confusion with sk_buff. buffer_heads do get used quite a bit though. A good microbenchmark would be to sit in a tight loop extending and truncating an ext2 file - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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