[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Sun, 25 Oct 2009 21:43:57 -0700
From: Stephen Hemminger <shemminger@...tta.com>
To: Octavian Purdila <opurdila@...acom.com>
Cc: netdev@...r.kernel.org
Subject: Re: [PATCH next-next-2.6] netdev: better dev_name_hash
On Sun, 25 Oct 2009 21:58:53 +0200
Octavian Purdila <opurdila@...acom.com> wrote:
>
> The current dev_name_hash is not very good at spreading entries when a
> large number of interfaces of the same type (e.g. ethXXXXX) are used.
>
> Here are some performance numbers for creating 16000 dummy interfaces with
> and without the patch (with per device sysctl entries disabled)
>
> With patch Without patch
>
> real 0m 2.27s real 0m 4.32s
> user 0m 0.00s user 0m 0.00s
> sys 0m 1.13s sys 0m 2.16s
>
> Signed-off-by: Octavian Purdila <opurdila@...acom.com>
> ---
> net/core/dev.c | 8 +++++++-
> 1 files changed, 7 insertions(+), 1 deletions(-)
My $.02 would for fixing full name hash because other usages would
benefit as well. Inventing special case for network devices seems
unnecessary.
--
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists