From: "Catalin(ux aka Dino) BOIE" <util@deuroconsult.ro>
To: Jens Axboe <axboe@suse.de>
Cc: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org
Subject: Re: Strange vmstat output. 2.6.10 Scheduler?
Date: Tue, 1 Feb 2005 12:54:39 +0200 (EET) [thread overview]
Message-ID: <Pine.LNX.4.62.0502011253390.26221@webhosting.rdsbv.ro> (raw)
In-Reply-To: <20050201104949.GM4137@suse.de>
> The vmstat you showed had bi and bo at the same time, so it's not so
> surprising if bi often suffers if it is seeking all over the map to
> write out the big chunk submitted.
I understand.
> How does it look with write cache enabled?
Seems that almost the same:
0 1 12416 6068 6908 816292 0 0 1744 156 1276 1327 16 2 0 82
0 1 12416 6028 6908 816324 0 0 0 0 1270 1237 8 2 0 90
0 1 12416 5988 6908 816324 0 0 0 0 1255 454 2 2 0 96
0 2 12416 5956 6952 816324 0 0 0 80 1277 348 2 1 0 97
0 2 12416 5944 6952 816324 0 0 0 0 1257 322 2 2 0 96
0 2 12416 5960 6952 816324 0 0 0 0 1256 380 2 2 0 96
procs -----------memory---------- ---swap-- -----io---- --system--
----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
1 2 12416 5960 6952 816324 0 0 0 0 1262 337 2 1 0 97
0 1 12416 4936 6952 817676 0 0 3400 180 1293 5466 31 6 0 63
0 1 12416 5276 6896 817180 0 0 5600 8288 1329 1622 15 4 0 81
0 1 12416 5212 6896 817228 0 0 0 0 1245 1237 7 2 0 91
0 1 12416 5148 6896 817252 0 0 0 0 1250 1313 7 3 0 90
0 1 12416 5152 6896 817284 0 0 0 0 1264 1243 7 2 0 91
0 2 12416 5152 6944 817284 0 0 0 104 1257 377 1 4 0 95
0 2 12416 5160 6944 817284 0 0 0 44 1250 407 2 1 0 97
0 2 12416 5160 6944 817284 0 0 0 0 1265 287 2 0 0 98
0 2 12416 5928 6940 816508 0 0 344 336 1272 384 2 3 0 95
0 1 12416 5608 6892 817088 0 0 4440 140 1246 5390 24 7 0 69
0 1 12416 5584 6848 817140 0 0 7436 612 1268 1707 16 3 0 81
0 1 12416 5960 6848 816480 0 0 5900 8156 1300 1428 9 5 0 86
0 1 12416 5632 6844 816824 0 0 1528 196 1271 1402 15 3 0 82
> Not surprising, there's not much the io scheduler can do for you here.
>
> --
> Jens Axboe
>
---
Catalin(ux aka Dino) BOIE
catab at deuroconsult.ro
http://kernel.umbrella.ro/
next prev parent reply other threads:[~2005-02-01 10:54 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-02-01 10:21 Catalin(ux aka Dino) BOIE
2005-02-01 10:26 ` Jens Axboe
2005-02-01 10:36 ` Catalin(ux aka Dino) BOIE
2005-02-01 10:42 ` Jens Axboe
2005-02-01 10:46 ` Catalin(ux aka Dino) BOIE
2005-02-01 10:49 ` Jens Axboe
2005-02-01 10:54 ` Catalin(ux aka Dino) BOIE [this message]
2005-02-01 10:59 ` Catalin(ux aka Dino) BOIE
2005-02-01 10:34 ` Massimo Cetra
2005-02-01 10:48 ` Catalin(ux aka Dino) BOIE
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