From: David Miller <davem@davemloft.net>
To: eric.dumazet@gmail.com
Cc: brouer@redhat.com, fw@strlen.de, netdev@vger.kernel.org,
pablo@netfilter.org, tgraf@suug.ch, amwang@redhat.com,
kaber@trash.net, paulmck@linux.vnet.ibm.com,
herbert@gondor.hengli.com.au
Subject: Re: [net-next PATCH V2 3/9] net: frag, move LRU list maintenance outside of rwlock
Date: Thu, 29 Nov 2012 13:31:08 -0500 (EST) [thread overview]
Message-ID: <20121129.133108.427624036846294750.davem@davemloft.net> (raw)
In-Reply-To: <1354213492.3299.22.camel@edumazet-glaptop>
From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Thu, 29 Nov 2012 10:24:52 -0800
> On Thu, 2012-11-29 at 13:05 -0500, David Miller wrote:
>
>> Replace 1024 in your formula with X and the limit is therefore
>> controlled by X.
>>
>> So it seems the high_thresh can be replaced with an appropriate
>> determination of X to size the hash.
>>
>> If X is 256, that limits us to ~130MB per cpu.
>>
>
> per host, as the table would be shared by all cpus.
I think a per-cpu hash might make more sense.
This would scale our limits to the size of the system.
I'm willing to be convinced otherwise, but it seems the most
sensible thing to do.
next prev parent reply other threads:[~2012-11-29 18:31 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-29 16:10 [net-next PATCH V2 0/9] net: fragmentation performance scalability on NUMA/SMP systems Jesper Dangaard Brouer
2012-11-29 16:11 ` [net-next PATCH V2 1/9] net: frag evictor, avoid killing warm frag queues Jesper Dangaard Brouer
2012-11-29 17:44 ` David Miller
2012-11-29 22:17 ` Jesper Dangaard Brouer
2012-11-29 23:01 ` Eric Dumazet
2012-11-30 10:04 ` Jesper Dangaard Brouer
2012-11-30 14:52 ` Eric Dumazet
2012-11-30 15:45 ` Jesper Dangaard Brouer
2012-11-30 16:37 ` Eric Dumazet
2012-11-30 21:37 ` Jesper Dangaard Brouer
2012-11-30 22:25 ` Eric Dumazet
2012-11-30 23:23 ` Jesper Dangaard Brouer
2012-11-30 23:47 ` Stephen Hemminger
2012-12-01 0:03 ` Eric Dumazet
2012-12-01 0:13 ` Stephen Hemminger
2012-11-30 23:58 ` Eric Dumazet
2012-12-04 13:30 ` [net-next PATCH V3-evictor] " Jesper Dangaard Brouer
2012-12-04 14:32 ` [net-next PATCH V3-evictor] net: frag evictor,avoid " David Laight
2012-12-04 14:47 ` [net-next PATCH V3-evictor] net: frag evictor, avoid " Eric Dumazet
2012-12-04 17:51 ` Jesper Dangaard Brouer
2012-12-05 9:24 ` Jesper Dangaard Brouer
2012-12-06 12:26 ` Jesper Dangaard Brouer
2012-12-06 12:32 ` Florian Westphal
2012-12-06 13:29 ` David Laight
2012-12-06 21:38 ` David Miller
2012-12-06 13:55 ` Jesper Dangaard Brouer
2012-12-06 14:47 ` Eric Dumazet
2012-12-06 15:23 ` Jesper Dangaard Brouer
2012-11-29 23:32 ` [net-next PATCH V2 1/9] " Eric Dumazet
2012-11-30 12:01 ` Jesper Dangaard Brouer
2012-11-30 14:57 ` Eric Dumazet
2012-11-29 16:11 ` [net-next PATCH V2 2/9] net: frag cache line adjust inet_frag_queue.net Jesper Dangaard Brouer
2012-11-29 16:12 ` [net-next PATCH V2 3/9] net: frag, move LRU list maintenance outside of rwlock Jesper Dangaard Brouer
2012-11-29 17:43 ` Eric Dumazet
2012-11-29 17:48 ` David Miller
2012-11-29 17:54 ` Eric Dumazet
2012-11-29 18:05 ` David Miller
2012-11-29 18:24 ` Eric Dumazet
2012-11-29 18:31 ` David Miller [this message]
2012-11-29 18:33 ` Eric Dumazet
2012-11-29 18:36 ` David Miller
2012-11-29 22:33 ` Jesper Dangaard Brouer
2012-11-29 16:12 ` [net-next PATCH V2 4/9] net: frag helper functions for mem limit tracking Jesper Dangaard Brouer
2012-11-29 16:13 ` [net-next PATCH V2 5/9] net: frag, per CPU resource, mem limit and LRU list accounting Jesper Dangaard Brouer
2012-11-29 17:06 ` Eric Dumazet
2012-11-29 17:31 ` David Miller
2012-12-03 14:02 ` Jesper Dangaard Brouer
2012-12-03 17:25 ` David Miller
2012-11-29 16:14 ` [net-next PATCH V2 6/9] net: frag, implement dynamic percpu alloc of frag_cpu_limit Jesper Dangaard Brouer
2012-11-29 16:15 ` [net-next PATCH V2 7/9] net: frag, move nqueues counter under LRU lock protection Jesper Dangaard Brouer
2012-11-29 16:15 ` [net-next PATCH V2 8/9] net: frag queue locking per hash bucket Jesper Dangaard Brouer
2012-11-29 17:08 ` Eric Dumazet
2012-11-30 12:55 ` Jesper Dangaard Brouer
2012-11-29 16:16 ` [net-next PATCH V2 9/9] net: increase frag queue hash size and cache-line Jesper Dangaard Brouer
2012-11-29 16:39 ` [net-next PATCH V2 9/9] net: increase frag queue hash size andcache-line David Laight
2012-11-29 16:55 ` [net-next PATCH V2 9/9] net: increase frag queue hash size and cache-line Eric Dumazet
2012-11-29 20:53 ` Jesper Dangaard Brouer
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