From: Peter Zijlstra <peterz@infradead.org>
To: "Török Edwin" <edwintorok@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>,
rml@tech9.net, Linux Kernel <linux-kernel@vger.kernel.org>,
"Thomas Gleixner mingo@redhat.com" <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>
Subject: Re: Quad core CPUs loaded at only 50% when running a CPU and mmap intensive multi-threaded task
Date: Mon, 25 Aug 2008 07:51:16 +0200 [thread overview]
Message-ID: <1219643476.20732.1.camel@twins> (raw)
In-Reply-To: <48B1CC15.2040006@gmail.com>
On Mon, 2008-08-25 at 00:01 +0300, Török Edwin wrote:
> Hi Ingo,
>
> When I run clamd (www.clamav.net), I can only get to load my CPU 50%
> (according to top), and disks at 30% (according to iostat -x 3),
> regardless how many threads I set (I tried 4, 8, 16, 32).
Can you share your .config, and prehaps tell what kernel version did
work for you?
next parent reply other threads:[~2008-08-25 5:52 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <48B1CC15.2040006@gmail.com>
2008-08-25 5:51 ` Peter Zijlstra [this message]
2008-08-25 7:04 ` Quad core CPUs loaded at only 50% when running a CPU and mmap intensive multi-threaded task edwin
2008-08-25 9:23 ` Peter Zijlstra
2008-08-25 9:49 ` Török Edwin
2008-08-25 10:02 ` Peter Zijlstra
2008-08-25 10:22 ` Török Edwin
2008-08-25 10:36 ` Peter Zijlstra
2008-08-25 11:00 ` edwin
2008-08-25 11:30 ` edwin
2008-08-25 11:41 ` Peter Zijlstra
2008-08-25 13:48 ` Theodore Tso
2008-08-26 8:12 ` Andi Kleen
2008-09-08 19:10 ` Török Edwin
2008-09-12 19:16 ` mmap/munmap latency on multithreaded apps, because pagefaults hold mmap_sem during disk read Török Edwin
2008-09-12 19:16 ` Török Edwin
2008-09-12 19:35 ` Mike Waychison
2008-09-12 19:35 ` Mike Waychison
2008-09-12 20:10 ` Török Edwin
2008-09-12 20:10 ` Török Edwin
2008-08-25 10:37 ` Quad core CPUs loaded at only 50% when running a CPU and mmap intensive multi-threaded task Peter Zijlstra
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