From: Pawel S <spawels13@gmail.com>
To: Jens Axboe <jens.axboe@oracle.com>
Cc: linux-kernel@vger.kernel.org, Ben Gamari <bgamari.foss@gmail.com>,
tytso <tytso@mit.edu>, Nick Piggin <npiggin@suse.de>,
Ingo Molnar <mingo@elte.hu>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: Poor interactive performance with I/O loads with fsync()ing
Date: Tue, 30 Mar 2010 12:46:34 +0200 [thread overview]
Message-ID: <8c4cf08c1003300346j73f4c106s49e494bbf2b329e7@mail.gmail.com> (raw)
In-Reply-To: <20100323132719.GY5768@kernel.dk>
2010/3/23 Jens Axboe <jens.axboe@oracle.com>:
> It's also been my sneaking suspicion that swap is involved. I had lots
> of RAM in anything I use, even the laptop and workstation. I'll try and
> run some tests with lower memory and force it into swap, I've seen nasty
> hangs that way.
I am not sure if the memory swapping is the case. According to KDE
System monitor swap is not even touched when copying files. I also
noticed similar responsiveness problems when extracting some rar files
- twelve parts , each about 100MB and the system becomes unresponsive
for some time since the first seconds of operation, then it behaves
normally and then problem is back. I have 2GB of RAM. I am using ext4
file system and I am using noatime mount option.
P.S. It seems it is a little better when I have AHCI mode set in BIOS
(at least when extracting archives).
P.S.2 I would be glad to provide some useful data. I created perf
chart, but if this is not enough just instruct me what should I do
next, please.
Regards
Pawel
next prev parent reply other threads:[~2010-03-30 10:46 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-23 11:28 Pawel S
2010-03-23 13:27 ` Jens Axboe
2010-03-26 3:35 ` Ben Gamari
2010-03-30 10:46 ` Pawel S [this message]
-- strict thread matches above, loose matches on Subject: below --
2010-03-16 15:31 Ben Gamari
2010-03-17 1:24 ` tytso
2010-03-17 3:18 ` Ben Gamari
2010-03-17 3:30 ` tytso
2010-03-17 4:31 ` Ben Gamari
2010-03-26 3:16 ` Ben Gamari
2010-03-17 4:53 ` Nick Piggin
2010-03-17 9:37 ` Ingo Molnar
2010-03-26 3:31 ` Ben Gamari
2010-04-09 15:21 ` Ben Gamari
2010-03-26 3:28 ` Ben Gamari
2010-03-23 19:51 ` Jesper Krogh
2010-03-26 3:13 ` Ben Gamari
2010-03-28 1:20 ` Ben Gamari
2010-03-28 1:29 ` Ben Gamari
2010-03-28 3:42 ` Arjan van de Ven
2010-03-28 14:06 ` Ben Gamari
2010-03-28 22:08 ` Andi Kleen
2010-04-09 14:56 ` Ben Gamari
2010-04-11 15:03 ` Avi Kivity
2010-04-11 16:35 ` Ben Gamari
2010-04-11 17:20 ` Andi Kleen
2010-04-11 18:16 ` Thomas Gleixner
2010-04-11 18:42 ` Andi Kleen
2010-04-11 21:54 ` Thomas Gleixner
2010-04-11 23:43 ` Hans-Peter Jansen
2010-04-12 0:22 ` Dave Chinner
2010-04-14 18:40 ` Ric Wheeler
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