From: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>
To: Wu Fengguang <fengguang.wu@intel.com>
Cc: Pekka Enberg <penberg@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mel@csn.ul.ie>, Jens Axboe <jaxboe@fusionio.com>,
Linux Netdev List <netdev@vger.kernel.org>
Subject: Re: slow performance on disk/network i/o full speed after drop_caches
Date: Thu, 25 Aug 2011 11:00:26 +0200 [thread overview]
Message-ID: <4E560F2A.1030801@profihost.ag> (raw)
In-Reply-To: <20110824093336.GB5214@localhost>
Am 24.08.2011 11:33, schrieb Wu Fengguang:
> On Wed, Aug 24, 2011 at 05:01:03PM +0800, Stefan Priebe - Profihost AG wrote:
>>
>>>> sync&& echo 3>/proc/sys/vm/drop_caches&& sleep 2&& echo 0
>>>>> /proc/sys/vm/drop_caches
>>
>> Another way to get it working again is to stop some processes. Could be
>> mysql or apache or php fcgi doesn't matter. Just free some memory.
>> Although there are already 5GB free.
>
> Is it a NUMA machine and _every_ node has enough free pages?
>
> grep . /sys/devices/system/node/node*/vmstat
>
> Thanks,
> Fengguang
Hi Fengguang,
thanks for your fast reply.
Here is the data you requested:
root@server1015-han:~# grep . /sys/devices/system/node/node*/vmstat
/sys/devices/system/node/node0/vmstat:nr_written 5546561
/sys/devices/system/node/node0/vmstat:nr_dirtied 5572497
/sys/devices/system/node/node1/vmstat:nr_written 3936
/sys/devices/system/node/node1/vmstat:nr_dirtied 4190
modified it a little bit:
~# while [ true ]; do ps -eo
user,pid,tid,class,rtprio,ni,pri,psr,pcpu,vsz,rss,pmem,stat,wchan:28,cmd
| grep scp | grep -v grep; sleep 1; done
root 12409 12409 TS - 0 19 0 59.8 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 0 64.0 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 0 67.7 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 8 70.6 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 8 73.5 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 8 76.0 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 8 78.2 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 8 80.0 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 8 80.9 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 2 76.7 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 1 75.6 42136 1724 0.0 Ds
pipe_read scp -t /tmp/
root 12409 12409 TS - 0 19 0 76.0 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 1 75.2 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 1 76.6 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 1 77.9 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 1 79.0 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 1 72.8 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 0 73.0 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 0 73.8 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 1 74.3 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 1 73.4 42136 1724 0.0 Ss
- scp -t /tmp/
root 12409 12409 TS - 0 19 1 71.3 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 1 71.9 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 0 72.7 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 3 73.5 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 3 74.4 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 3 75.2 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 0 76.0 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 8 76.6 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 1 74.8 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 1 73.2 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 1 73.9 42136 1724 0.0 Rs
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 0 72.4 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 8 72.0 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 8 72.5 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 8 72.9 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 8 73.5 42136 1724 0.0 Rs
- scp -t /tmp/
root 12566 12566 TS - 0 19 1 0.0 42136 1728 0.0 Rs
- scp -t /tmp/
root 12566 12566 TS - 0 19 1 23.0 42136 1728 0.0 Rs
- scp -t /tmp/
root 12566 12566 TS - 0 19 1 49.5 42136 1728 0.0 Rs
- scp -t /tmp/
root 12566 12566 TS - 0 19 2 63.3 42136 1728 0.0 Rs
- scp -t /tmp/
root 12566 12566 TS - 0 19 1 71.5 42136 1728 0.0 Rs
- scp -t /tmp/
root 12566 12566 TS - 0 19 1 77.4 42136 1728 0.0 Rs
- scp -t /tmp/
root 12566 12566 TS - 0 19 1 70.3 42136 1728 0.0 Rs
- scp -t /tmp/
root 12566 12566 TS - 0 19 1 73.1 42136 1728 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12566 12566 TS - 0 19 0 65.7 42136 1728 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12566 12566 TS - 0 19 1 61.2 42136 1728 0.0 Ss
- scp -t /tmp/
root 12566 12566 TS - 0 19 1 63.7 42136 1728 0.0 Rs
- scp -t /tmp/
root 12636 12636 TS - 0 19 8 0.0 42136 1728 0.0 Ss
poll_schedule_timeout scp -t /tmp/
Stefan
WARNING: multiple messages have this Message-ID (diff)
From: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>
To: Wu Fengguang <fengguang.wu@intel.com>
Cc: Pekka Enberg <penberg@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mel@csn.ul.ie>, Jens Axboe <jaxboe@fusionio.com>,
Linux Netdev List <netdev@vger.kernel.org>
Subject: Re: slow performance on disk/network i/o full speed after drop_caches
Date: Thu, 25 Aug 2011 11:00:26 +0200 [thread overview]
Message-ID: <4E560F2A.1030801@profihost.ag> (raw)
In-Reply-To: <20110824093336.GB5214@localhost>
Am 24.08.2011 11:33, schrieb Wu Fengguang:
> On Wed, Aug 24, 2011 at 05:01:03PM +0800, Stefan Priebe - Profihost AG wrote:
>>
>>>> sync&& echo 3>/proc/sys/vm/drop_caches&& sleep 2&& echo 0
>>>>> /proc/sys/vm/drop_caches
>>
>> Another way to get it working again is to stop some processes. Could be
>> mysql or apache or php fcgi doesn't matter. Just free some memory.
>> Although there are already 5GB free.
>
> Is it a NUMA machine and _every_ node has enough free pages?
>
> grep . /sys/devices/system/node/node*/vmstat
>
> Thanks,
> Fengguang
Hi Fengguang,
thanks for your fast reply.
Here is the data you requested:
root@server1015-han:~# grep . /sys/devices/system/node/node*/vmstat
/sys/devices/system/node/node0/vmstat:nr_written 5546561
/sys/devices/system/node/node0/vmstat:nr_dirtied 5572497
/sys/devices/system/node/node1/vmstat:nr_written 3936
/sys/devices/system/node/node1/vmstat:nr_dirtied 4190
modified it a little bit:
~# while [ true ]; do ps -eo
user,pid,tid,class,rtprio,ni,pri,psr,pcpu,vsz,rss,pmem,stat,wchan:28,cmd
| grep scp | grep -v grep; sleep 1; done
root 12409 12409 TS - 0 19 0 59.8 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 0 64.0 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 0 67.7 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 8 70.6 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 8 73.5 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 8 76.0 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 8 78.2 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 8 80.0 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 8 80.9 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 2 76.7 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 1 75.6 42136 1724 0.0 Ds
pipe_read scp -t /tmp/
root 12409 12409 TS - 0 19 0 76.0 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 1 75.2 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 1 76.6 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 1 77.9 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 1 79.0 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 1 72.8 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 0 73.0 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 0 73.8 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 1 74.3 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 1 73.4 42136 1724 0.0 Ss
- scp -t /tmp/
root 12409 12409 TS - 0 19 1 71.3 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 1 71.9 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 0 72.7 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 3 73.5 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 3 74.4 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 3 75.2 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 0 76.0 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 8 76.6 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 1 74.8 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 1 73.2 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 1 73.9 42136 1724 0.0 Rs
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 0 72.4 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 8 72.0 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 8 72.5 42136 1724 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12409 12409 TS - 0 19 8 72.9 42136 1724 0.0 Rs
- scp -t /tmp/
root 12409 12409 TS - 0 19 8 73.5 42136 1724 0.0 Rs
- scp -t /tmp/
root 12566 12566 TS - 0 19 1 0.0 42136 1728 0.0 Rs
- scp -t /tmp/
root 12566 12566 TS - 0 19 1 23.0 42136 1728 0.0 Rs
- scp -t /tmp/
root 12566 12566 TS - 0 19 1 49.5 42136 1728 0.0 Rs
- scp -t /tmp/
root 12566 12566 TS - 0 19 2 63.3 42136 1728 0.0 Rs
- scp -t /tmp/
root 12566 12566 TS - 0 19 1 71.5 42136 1728 0.0 Rs
- scp -t /tmp/
root 12566 12566 TS - 0 19 1 77.4 42136 1728 0.0 Rs
- scp -t /tmp/
root 12566 12566 TS - 0 19 1 70.3 42136 1728 0.0 Rs
- scp -t /tmp/
root 12566 12566 TS - 0 19 1 73.1 42136 1728 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12566 12566 TS - 0 19 0 65.7 42136 1728 0.0 Ss
poll_schedule_timeout scp -t /tmp/
root 12566 12566 TS - 0 19 1 61.2 42136 1728 0.0 Ss
- scp -t /tmp/
root 12566 12566 TS - 0 19 1 63.7 42136 1728 0.0 Rs
- scp -t /tmp/
root 12636 12636 TS - 0 19 8 0.0 42136 1728 0.0 Ss
poll_schedule_timeout scp -t /tmp/
Stefan
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next prev parent reply other threads:[~2011-08-25 9:00 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-24 6:06 slow performance on disk/network i/o full speed after drop_caches Stefan Priebe - Profihost AG
2011-08-24 6:20 ` Pekka Enberg
2011-08-24 6:20 ` Pekka Enberg
2011-08-24 9:01 ` Stefan Priebe - Profihost AG
2011-08-24 9:01 ` Stefan Priebe - Profihost AG
2011-08-24 9:33 ` Wu Fengguang
2011-08-24 9:33 ` Wu Fengguang
2011-08-25 9:00 ` Stefan Priebe - Profihost AG [this message]
2011-08-25 9:00 ` Stefan Priebe - Profihost AG
2011-08-26 2:16 ` Wu Fengguang
2011-08-26 2:16 ` Wu Fengguang
2011-08-26 2:54 ` Stefan Priebe - Profihost AG
2011-08-26 2:54 ` Stefan Priebe - Profihost AG
2011-08-26 3:03 ` Wu Fengguang
2011-08-26 3:03 ` Wu Fengguang
2011-08-26 3:13 ` Stefan Priebe
2011-08-26 3:13 ` Stefan Priebe
2011-08-26 3:26 ` Wu Fengguang
2011-08-26 3:26 ` Wu Fengguang
2011-08-26 3:30 ` Zhu Yanhai
2011-08-26 3:30 ` Zhu Yanhai
2011-08-26 6:18 ` Stefan Priebe - Profihost AG
2011-08-26 6:18 ` Stefan Priebe - Profihost AG
2011-08-31 7:11 ` Stefan Priebe - Profihost AG
2011-08-31 7:11 ` Stefan Priebe - Profihost AG
2011-09-01 4:14 ` Wu Fengguang
2011-09-01 4:14 ` Wu Fengguang
2011-09-01 5:41 ` Stefan Priebe - Profihost AG
2011-09-01 5:41 ` Stefan Priebe - Profihost AG
2011-09-01 12:57 ` Mel Gorman
2011-09-01 12:57 ` Mel Gorman
2011-08-24 9:32 ` Wu Fengguang
2011-08-24 9:32 ` Wu Fengguang
2011-08-24 9:32 ` Wu Fengguang
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