From: Dave Hansen <dave.hansen@intel.com>
To: kernel test robot <fengguang.wu@intel.com>
Cc: LKML <linux-kernel@vger.kernel.org>, lkp@linux.intel.com
Subject: Re: [slub shrink] 0f6934bf16: +191.9% vmstat.system.cs
Date: Thu, 16 Jan 2014 11:12:19 -0800 [thread overview]
Message-ID: <52D82F13.9070309@intel.com> (raw)
In-Reply-To: <20140116030744.GA19349@localhost>
On 01/15/2014 07:07 PM, kernel test robot wrote:
> 9a0bb2966efbf30 0f6934bf1695682e7ced973f6
> --------------- -------------------------
> 8235933 ~ 2% +80.6% 14872911 ~ 3% lkp-sbx04/micro/will-it-scale/read2
> 8235933 +80.6% 14872911 TOTAL interrupts.RES
>
> 9a0bb2966efbf30 0f6934bf1695682e7ced973f6
> --------------- -------------------------
> 161531 ~ 7% +191.9% 471544 ~ 9% lkp-sbx04/micro/will-it-scale/read2
> 161531 +191.9% 471544 TOTAL vmstat.system.cs
>
> 9a0bb2966efbf30 0f6934bf1695682e7ced973f6
> --------------- -------------------------
> 32943 ~ 1% +71.8% 56599 ~ 3% lkp-sbx04/micro/will-it-scale/read2
> 32943 +71.8% 56599 TOTAL vmstat.system.in
I suspect that something is wrong with that system. My 160-cpu system
does about 40,000 interrupts/sec and ~4300 context switches/sec when
running 160 read2_processes. I wonder if you're hitting swap or the
dirty limits or something. Are you running it with way more threads
than it has CPUs?
Also, are those will-it-scale tests the threaded or process versions?
next prev parent reply other threads:[~2014-01-16 19:13 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-16 3:07 [slub shrink] 0f6934bf16: +191.9% vmstat.system.cs kernel test robot
2014-01-16 19:12 ` Dave Hansen [this message]
2014-01-17 0:26 ` Fengguang Wu
2014-01-17 13:00 ` Fengguang Wu
2014-01-29 8:26 ` Fengguang Wu
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