From: "David S. Miller" <davem@davemloft.net>
To: clameter@engr.sgi.com
Cc: linux-kernel@vger.kernel.org, linux-net@vger.kernel.org,
shai@scalex86.org, akpm@osdl.org, netdev@vger.kernel.org,
herbert@gondor.apana.org.au
Subject: Re: [PATCH] dst_entry structure use,lastuse and refcnt abstraction
Date: Thu, 23 Jun 2005 23:16:55 -0700 (PDT) [thread overview]
Message-ID: <20050623.231655.68159153.davem@davemloft.net> (raw)
In-Reply-To: <Pine.LNX.4.62.0506232256360.17993@schroedinger.engr.sgi.com>
From: Christoph Lameter <clameter@engr.sgi.com>
Date: Thu, 23 Jun 2005 23:03:45 -0700 (PDT)
> Ok. Then we are done. With 58 Itanium processors and 200G Ram I get
> more than 10% improvement ;-). With 500 tasks we have 453 vs. 499 j/m/t.
> That is 9.21%. For 300 tasks we have 9.4% etc. I am sure that I can push
> this some more with bigger counts of processors and also some other NUMA
> related performance issues.
So it took 7 times more processors to increase the performance gain by
just over 3 on a microscopic synthetic benchmark. That's not
impressive at all.
And you still haven't shown what happens for the workloads I
suggested. A web benchmark, with say a thousand unique clients, would
be sufficient for one of those btw. That case has very low dst
locality, yet dsts are useful because you'll have about 2 or 3
concurrent connections per dst.
next prev parent reply other threads:[~2005-06-24 6:16 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.62.0506231953260.28244@graphe.net>
2005-06-24 3:36 ` [PATCH] dst_entry structure use,lastuse and refcnt abstraction David S. Miller
2005-06-24 3:40 ` Christoph Lameter
2005-06-24 3:47 ` David S. Miller
2005-06-24 3:49 ` Christoph Lameter
2005-06-24 3:54 ` David S. Miller
2005-06-24 4:06 ` Christoph Lameter
2005-06-24 4:11 ` David S. Miller
2005-06-24 6:03 ` Christoph Lameter
2005-06-24 6:16 ` David S. Miller [this message]
2005-06-24 10:57 ` [PATCH] bugfix and scalability changes in net/ipv4/route.c Eric Dumazet
2005-06-28 20:14 ` David S. Miller
[not found] ` <Pine.LNX.4.62.0506232005030.28244@graphe.net>
2005-06-24 4:58 ` [PATCH] dst numa: Avoid dst counter cacheline bouncing Dipankar Sarma
2005-06-24 5:05 ` Christoph Lameter
2005-06-24 7:29 ` Dipankar Sarma
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