From: Andi Kleen <ak@muc.de>
To: P@draigBrady.com
Cc: Andi Kleen <ak@muc.de>, netdev@oss.sgi.com
Subject: Re: [PATCH] Avoid gettimeofday when not needed
Date: 31 Mar 2004 15:53:25 +0200
Date: Wed, 31 Mar 2004 15:53:25 +0200 [thread overview]
Message-ID: <20040331135325.GA62402@colin2.muc.de> (raw)
In-Reply-To: <406AB7F6.6010805@draigBrady.com>
On Wed, Mar 31, 2004 at 01:22:14PM +0100, P@draigBrady.com wrote:
> Andi Kleen wrote:
> >This patch implements an optimization I proposed a long time
> >ago. gettimeofday can be quite costly and it currently is
> >on the fast path of every packet. Normally the packet time stamp
> >is not needed (e.g. TCP doesn't use it), except for tcpdump
> >and a few applications.
>
> Will this work for apps that don't use a seperate syscall
> to get the timestamp. Like CONFIG_PACKET_MMAP for e.g?
The mmap will enable the time stamp, until the socket is closed.
-Andi
next prev parent reply other threads:[~2004-03-31 13:53 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-31 12:01 [PATCH] Avoid gettimeofday when not needed Andi Kleen
2004-03-31 12:22 ` P
2004-03-31 13:53 ` Andi Kleen [this message]
2004-03-31 13:45 ` Ville Nuorvala
2004-03-31 13:54 ` Andi Kleen
2004-03-31 14:24 ` Ville Nuorvala
2004-03-31 15:10 ` Andi Kleen
2004-03-31 17:30 ` Ben Greear
2004-03-31 17:50 ` Andi Kleen
2004-03-31 18:53 ` Ben Greear
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