From: Nick Piggin <npiggin@kernel.dk>
To: Nick Piggin <npiggin@kernel.dk>
Cc: xfs@oss.sgi.com
Subject: Re: XFS performance oddity
Date: Tue, 23 Nov 2010 23:30:37 +1100 [thread overview]
Message-ID: <20101123123037.GA4851@amd> (raw)
In-Reply-To: <20101123122449.GA4812@amd>
On Tue, Nov 23, 2010 at 11:24:49PM +1100, Nick Piggin wrote:
> Hi,
>
> Running parallel fs_mark (0 size inodes, fsync on close) on a ramdisk
> ends up with XFS in funny patterns.
>
> procs -----------memory---------- ---swap-- -----io---- -system--
> ----cpu----
> r b swpd free buff cache si so bi bo in cs us sy
> id wa
> 24 1 6576 166396 252 393676 132 140 16900 80666 21308 104333 1 84 14 1
> 21 0 6712 433856 256 387080 100 224 9152 53487 13677 53732 0 55 45 0
> 2 0 7068 463496 248 389100 0 364 2940 17896 4485 26122 0 33 65 2
> 1 0 7068 464340 248 388928 0 0 0 0 66 207 0 0 100 0
> 0 0 7068 464340 248 388928 0 0 0 0 79 200 0 0 100 0
> 0 0 7068 464544 248 388928 0 0 0 0 65 199 0 0 100 0
> 1 0 7068 464748 248 388928 0 0 0 0 79 201 0 0 100 0
> 0 0 7068 465064 248 388928 0 0 0 0 66 202 0 0 100 0
> 0 0 7068 465312 248 388928 0 0 0 0 80 200 0 0 100 0
> 0 0 7068 465500 248 388928 0 0 0 0 65 199 0 0 100 0
> 0 0 7068 465500 248 388928 0 0 0 0 80 202 0 0 100 0
> 1 0 7068 465500 248 388928 0 0 0 0 66 203 0 0 100 0
> 0 0 7068 465500 248 388928 0 0 0 0 79 200 0 0 100 0
> 23 0 7068 460332 248 388800 0 0 1416 8896 1981 7142 0 1 99 0
> 6 0 6968 360248 248 403736 56 0 15568 95171 19438 110825 1 79 21 0
> 23 0 6904 248736 248 419704 392 0 17412 118270 20208 111396 1 82 17 0
> 9 0 6884 266116 248 435904 128 0 14956 79756 18554 118020 1 76 23 0
> 0 0 6848 219640 248 445760 212 0 9932 51572 12622 76491 0 60 40 0
>
> Got a dump of sleeping tasks. Any ideas?
Oh, this is with a lot of kernel debug options, including xfs debugging
turned on. So it might not be an interesting performance measurement.
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next prev parent reply other threads:[~2010-11-23 12:29 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-23 12:24 XFS performance oddity Nick Piggin
2010-11-23 12:30 ` Nick Piggin [this message]
2010-11-23 20:58 ` Dave Chinner
2010-11-24 0:50 ` Nick Piggin
2010-11-24 3:15 ` Dave Chinner
2010-11-24 5:28 ` [PATCH] " Dave Chinner
2010-11-25 4:54 ` Nick Piggin
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