From: Hans de Goede <j.w.r.degoede@hhs.nl>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: dada1@cosmosbay.com, davej@redhat.com, netdev@vger.kernel.org
Subject: Re: cat /proc/net/tcp takes 0.5 seconds on x86_64
Date: Wed, 27 Aug 2008 11:07:54 +0200 [thread overview]
Message-ID: <48B5196A.2080502@hhs.nl> (raw)
In-Reply-To: <E1KYCV5-0002jW-00@gondolin.me.apana.org.au>
Herbert Xu wrote:
> Hans de Goede <j.w.r.degoede@hhs.nl> wrote:
>> Eric Dumazet wrote:
>>
>>> # dmesg | grep "TCP established hash"
>>> TCP established hash table entries: 262144 (order: 10, 4194304 bytes)
>>> # time cat /proc/net/tcp >/dev/null
>>>
>>> real 0m0.091s
>>> user 0m0.001s
>>> sys 0m0.090s
>> As quoted above my idle x86_64, using the exact same hash table size, running
>> 2.6.27-rc2.git1 uses 0.520 seconds for that same command, thats a difference of
>> more then a factor 50 !!
>
> That looks like a factor of 5 to me, not 50.
>
Erm, you are completely right ofcourse.
Regards,
Hans
next prev parent reply other threads:[~2008-08-27 8:56 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-459782-176318@bugzilla.redhat.com>
[not found] ` <200808261549.m7QFnVUN032543@bz-web1.app.phx.redhat.com>
2008-08-26 16:37 ` cat /proc/net/tcp takes 0.5 seconds on x86_64 Dave Jones
2008-08-26 18:32 ` Eric Dumazet
2008-08-26 19:01 ` Hans de Goede
2008-08-26 20:39 ` Eric Dumazet
2008-08-26 20:58 ` Hans de Goede
2008-08-26 21:27 ` Eric Dumazet
2008-08-27 9:14 ` Hans de Goede
2008-08-27 9:05 ` David Miller
2008-08-27 9:45 ` Hans de Goede
2008-08-27 9:39 ` David Miller
2008-08-27 4:19 ` Herbert Xu
2008-08-27 9:07 ` Hans de Goede [this message]
2008-08-27 12:41 ` Andi Kleen
2008-08-27 21:29 ` Trent Piepho
2008-08-27 21:47 ` Andi Kleen
2008-08-27 22:54 ` Andi Kleen
2008-08-27 21:29 ` David Miller
2008-08-27 21:48 ` Stephen Hemminger
2008-08-27 22:09 ` David Miller
2008-08-28 6:20 ` Eric Dumazet
2008-08-28 6:51 ` David Miller
2008-08-28 7:13 ` Eric Dumazet
2008-08-28 7:57 ` David Miller
2008-08-28 9:52 ` Eric Dumazet
2008-08-28 7:26 ` Andi Kleen
2008-08-27 22:34 ` Andi Kleen
2008-08-27 22:39 ` David Miller
2008-08-27 22:57 ` Andi Kleen
2008-08-27 23:07 ` David Miller
2008-08-27 23:09 ` Eric Dumazet
2008-08-27 23:15 ` David Miller
2008-08-27 23:35 ` Andi Kleen
2008-08-27 23:43 ` Eric Dumazet
2008-08-27 23:45 ` David Miller
2008-08-28 0:40 ` Eric Dumazet
2008-08-28 7:45 ` Andi Kleen
2008-08-28 7:59 ` David Miller
2008-08-28 8:12 ` Hans de Goede
2008-08-28 8:04 ` David Miller
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