From: Andrew Morton <akpm@linux-foundation.org>
To: Christoph Lameter <clameter@sgi.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Remove constructor from buffer_head
Date: Thu, 3 May 2007 20:21:11 -0700 [thread overview]
Message-ID: <20070503202111.667c9b14.akpm@linux-foundation.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0705032007540.16627@schroedinger.engr.sgi.com>
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.
next prev parent reply other threads:[~2007-05-04 3:21 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-04 3:08 Remove constructor from buffer_head Christoph Lameter
2007-05-04 3:21 ` Andrew Morton [this message]
2007-05-04 3:34 ` Christoph Lameter
2007-05-04 4:37 ` Andrew Morton
2007-05-04 4:34 ` Christoph Lameter
2007-05-04 6:35 ` William Lee Irwin III
2007-05-04 16:05 ` Christoph Lameter
2007-05-04 20:42 ` Andrew Morton
2007-05-04 21:33 ` Andrew Morton
2007-05-04 23:22 ` Andi Kleen
2007-05-04 23:45 ` Andrew Morton
2007-05-05 9:31 ` Andi Kleen
2007-05-13 20:38 ` oprofile broken in 2.6.21 SMP (was Re: Remove constructor from buffer_head) Benjamin LaHaise
2007-05-15 3:12 ` Andrew Morton
2007-05-04 21:42 ` Remove constructor from buffer_head Christoph Lameter
2007-05-04 21:47 ` Andrew Morton
2007-05-04 21:52 ` Chuck Ebbert
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