From: Eric Dumazet <dada1@cosmosbay.com>
To: Rick Jones <rick.jones2@hp.com>
Cc: Netfilter Developers <netfilter-devel@vger.kernel.org>,
Patrick McHardy <kaber@trash.net>,
Linux Network Development list <netdev@vger.kernel.org>,
Stephen Hemminger <shemminger@vyatta.com>
Subject: Re: 32 core net-next stack/netfilter "scaling"
Date: Tue, 27 Jan 2009 23:34:02 +0100 [thread overview]
Message-ID: <497F8BDA.6080908@cosmosbay.com> (raw)
In-Reply-To: <497F8ACD.2050203@hp.com>
Rick Jones a écrit :
>
>> Thanks for the report
>>
>> If you have so much contention on spinlocks, maybe hash function is
>> not good at all...
>>
>> hash = (unsigned long)ct;
>> hash ^= hash >> 16;
>> hash ^= hash >> 8;
>>
>> I ass-u-me you compiled your kernel with NR_CPUS=32 ?
>
> I believe so - CONFIG_NR_CPUS in .config is 64 anyway. If there is a
> more definitive place to check I'd be happy to look.
>
> rick
>
>
By any chance, are you using SLAB instead of SLUB ?
While running your netperf session, issuing :
grep conntrack /proc/slabinfo
Would help to know hash dispertion on your machine.
next prev parent reply other threads:[~2009-01-27 22:34 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-26 22:15 32 core net-next stack/netfilter "scaling" Rick Jones
2009-01-26 23:10 ` Eric Dumazet
2009-01-26 23:14 ` Stephen Hemminger
2009-01-26 23:19 ` Rick Jones
2009-01-27 9:10 ` Eric Dumazet
2009-01-27 9:15 ` Patrick McHardy
2009-01-27 11:29 ` Eric Dumazet
2009-01-27 11:37 ` Patrick McHardy
2009-01-27 16:23 ` Eric Dumazet
2009-01-27 17:33 ` Patrick McHardy
2009-01-27 18:02 ` Rick Jones
2009-01-27 19:09 ` Rick Jones
2009-01-27 19:24 ` Rick Jones
2009-01-27 22:17 ` Eric Dumazet
2009-01-27 22:29 ` Rick Jones
2009-01-27 22:34 ` Eric Dumazet [this message]
2009-01-27 22:43 ` Rick Jones
2009-01-28 13:55 ` Eric Dumazet
2009-01-28 16:25 ` Patrick McHardy
2009-01-28 17:07 ` Eric Dumazet
2009-01-28 17:34 ` Eric Dumazet
2009-01-29 15:31 ` [PATCH] netfilter: unfold two critical loops in ip_packet_match() Eric Dumazet
2009-01-30 15:47 ` Andi Kleen
2009-01-30 16:54 ` Eric Dumazet
2009-01-30 17:27 ` Andi Kleen
2009-01-30 17:27 ` Eric Dumazet
2009-01-30 17:50 ` Andi Kleen
2009-02-09 13:41 ` Patrick McHardy
2009-02-18 15:10 ` Eric Dumazet
2009-02-18 15:21 ` Patrick McHardy
2009-02-18 16:33 ` Eric Dumazet
2009-02-18 16:52 ` Patrick McHardy
2009-02-18 17:36 ` [PATCH] netfilter: xt_physdev fixes Eric Dumazet
2009-02-18 18:14 ` Patrick McHardy
2009-02-19 8:00 ` [PATCH] netfilter: unfold two loops in physdev_mt() Eric Dumazet
2009-02-19 8:14 ` [PATCH] netfilter: unfold two loops in ip6_packet_match() Eric Dumazet
2009-02-19 10:19 ` Patrick McHardy
2009-02-19 10:17 ` [PATCH] netfilter: unfold two loops in physdev_mt() Patrick McHardy
2009-02-20 10:02 ` [PATCH] netfilter: unfold two critical loops in ip_packet_match() Eric Dumazet
2009-02-20 10:04 ` Patrick McHardy
2009-02-09 14:57 ` 32 core net-next stack/netfilter "scaling" Patrick McHardy
2009-02-10 18:44 ` Stephen Hemminger
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