From: Andi Kleen <andi@firstfloor.org>
To: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Cc: Eric Dumazet <dada1@cosmosbay.com>,
akepner@sgi.com, linux@horizon.com, davem@davemloft.net,
netdev@vger.kernel.org, bcrl@kvack.org
Subject: Re: Extensible hashing and RCU
Date: 19 Feb 2007 23:10:09 +0100 [thread overview]
Message-ID: <p73mz39er3y.fsf@bingen.suse.de> (raw)
In-Reply-To: <20070219135608.GA10268@2ka.mipt.ru>
Evgeniy Polyakov <johnpol@2ka.mipt.ru> writes:
>
> My experiment shows almost 400 nsecs without _any_ locks - they are
> removed completely - it is pure hash selection/list traverse time.
Are you sure you're not measuring TLB misses too? In user space
you likely use 4K pages. The kernel would use 2MB pages.
I would suggest putting the tables into hugetlbfs allocated memory
in your test program.
-Andei
next prev parent reply other threads:[~2007-02-19 21:10 UTC|newest]
Thread overview: 102+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-04 7:41 Extensible hashing and RCU linux
2007-02-05 18:02 ` akepner
2007-02-17 13:13 ` Evgeniy Polyakov
2007-02-18 18:46 ` Eric Dumazet
2007-02-18 19:10 ` Evgeniy Polyakov
2007-02-18 20:21 ` Eric Dumazet
2007-02-18 21:23 ` Michael K. Edwards
2007-02-18 22:04 ` Michael K. Edwards
2007-02-19 12:04 ` Andi Kleen
2007-02-19 19:18 ` Michael K. Edwards
2007-02-19 11:41 ` Evgeniy Polyakov
2007-02-19 13:38 ` Eric Dumazet
2007-02-19 13:56 ` Evgeniy Polyakov
2007-02-19 14:14 ` Eric Dumazet
2007-02-19 14:25 ` Evgeniy Polyakov
2007-02-19 15:14 ` Eric Dumazet
2007-02-19 18:13 ` Eric Dumazet
2007-02-19 18:26 ` Benjamin LaHaise
2007-02-19 18:38 ` Benjamin LaHaise
2007-02-20 9:25 ` Evgeniy Polyakov
2007-02-20 9:57 ` David Miller
2007-02-20 10:22 ` Evgeniy Polyakov
2007-02-20 10:04 ` Eric Dumazet
2007-02-20 10:12 ` David Miller
2007-02-20 10:30 ` Evgeniy Polyakov
2007-02-20 11:10 ` Eric Dumazet
2007-02-20 11:23 ` Evgeniy Polyakov
2007-02-20 11:30 ` Eric Dumazet
2007-02-20 11:41 ` Evgeniy Polyakov
2007-02-20 10:49 ` Eric Dumazet
2007-02-20 15:07 ` Michael K. Edwards
2007-02-20 15:11 ` Evgeniy Polyakov
2007-02-20 15:49 ` Michael K. Edwards
2007-02-20 15:59 ` Evgeniy Polyakov
2007-02-20 16:08 ` Eric Dumazet
2007-02-20 16:20 ` Evgeniy Polyakov
2007-02-20 16:38 ` Eric Dumazet
2007-02-20 16:59 ` Evgeniy Polyakov
2007-02-20 17:05 ` Evgeniy Polyakov
2007-02-20 17:53 ` Eric Dumazet
2007-02-20 18:00 ` Evgeniy Polyakov
2007-02-20 18:55 ` Eric Dumazet
2007-02-20 19:06 ` Evgeniy Polyakov
2007-02-20 19:17 ` Eric Dumazet
2007-02-20 19:36 ` Evgeniy Polyakov
2007-02-20 19:44 ` Michael K. Edwards
2007-02-20 17:20 ` Eric Dumazet
2007-02-20 17:55 ` Evgeniy Polyakov
2007-02-20 18:12 ` Evgeniy Polyakov
2007-02-20 19:13 ` Michael K. Edwards
2007-02-20 19:44 ` Evgeniy Polyakov
2007-02-20 20:03 ` Michael K. Edwards
2007-02-20 20:09 ` Michael K. Edwards
2007-02-21 8:56 ` Evgeniy Polyakov
2007-02-21 9:34 ` David Miller
2007-02-21 9:51 ` Evgeniy Polyakov
2007-02-21 10:03 ` David Miller
2007-02-21 8:54 ` Evgeniy Polyakov
2007-02-21 9:15 ` Eric Dumazet
2007-02-21 9:27 ` Evgeniy Polyakov
2007-02-21 9:38 ` Eric Dumazet
2007-02-21 9:57 ` Evgeniy Polyakov
2007-02-21 21:15 ` Michael K. Edwards
2007-02-22 9:06 ` David Miller
2007-02-22 11:00 ` Michael K. Edwards
2007-02-22 11:07 ` David Miller
2007-02-22 19:24 ` Stephen Hemminger
2007-02-20 16:04 ` Eric Dumazet
2007-02-22 23:49 ` linux
2007-02-23 2:31 ` Michael K. Edwards
2007-02-20 10:44 ` Evgeniy Polyakov
2007-02-20 11:09 ` Eric Dumazet
2007-02-20 11:29 ` Evgeniy Polyakov
2007-02-20 11:34 ` Eric Dumazet
2007-02-20 11:45 ` Evgeniy Polyakov
2007-02-21 12:41 ` Andi Kleen
2007-02-21 13:19 ` Eric Dumazet
2007-02-21 13:37 ` David Miller
2007-02-21 23:13 ` Robert Olsson
2007-02-22 6:06 ` Eric Dumazet
2007-02-22 11:41 ` Andi Kleen
2007-02-22 11:44 ` David Miller
2007-02-20 12:11 ` Evgeniy Polyakov
2007-02-19 22:10 ` Andi Kleen [this message]
2007-02-19 12:02 ` Andi Kleen
2007-02-19 12:35 ` Robert Olsson
2007-02-19 14:04 ` Evgeniy Polyakov
2007-03-02 8:52 ` Evgeniy Polyakov
2007-03-02 9:56 ` Eric Dumazet
2007-03-02 10:28 ` Evgeniy Polyakov
2007-03-02 20:45 ` Michael K. Edwards
2007-03-03 10:46 ` Evgeniy Polyakov
2007-03-04 10:02 ` Michael K. Edwards
2007-03-04 20:36 ` David Miller
2007-03-05 7:12 ` Michael K. Edwards
2007-03-05 10:02 ` Robert Olsson
2007-03-05 10:00 ` Evgeniy Polyakov
2007-03-13 9:32 ` Evgeniy Polyakov
2007-03-13 10:08 ` Eric Dumazet
2007-03-13 10:24 ` Evgeniy Polyakov
2007-02-05 18:41 ` [RFC/TOY]Extensible " akepner
2007-02-06 19:09 ` linux
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