From: Christoph Hellwig <hch@infradead.org>
To: Geoffrey Wehrman <gwehrman@sgi.com>
Cc: Christoph Hellwig <hch@infradead.org>, xfs@oss.sgi.com
Subject: Re: [PATCH 00/14] repair memory usage reductions
Date: Fri, 4 Sep 2009 10:51:09 -0400 [thread overview]
Message-ID: <20090904145109.GA8351@infradead.org> (raw)
In-Reply-To: <20090904133737.GD12052@sgi.com>
On Fri, Sep 04, 2009 at 08:37:37AM -0500, Geoffrey Wehrman wrote:
> On Fri, Sep 04, 2009 at 12:57:53PM +1000, Dave Chinner wrote:
> | Christoph asked me to repeat what I said on #xfs w.r.t the regression.
>
> Thank you for the detailed description. All I had was a statement from
> January 2008, "Barry has completed the memory optimization, but initial
> testing shows that performance has regressed." That was the last update
> recorded on Barry's work.
>
> | With that in mind, I think the memory usage optimisation is far more
> | important to the majority of XFS users than the CPU usage regression
> | it causes as the majority of users don't have RAM-rich environments
> | to run repair in.
>
> I agree.
In my testing I haven't seen big differences in performance, it
sometimes got a bit faster and sometimes a bit slower. I will send out
a more detailed performace report in a few days.
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next prev parent reply other threads:[~2009-09-04 14:53 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-02 17:55 [PATCH 00/14] repair memory usage reductions Christoph Hellwig
2009-09-02 17:55 ` [PATCH 01/14] repair: merge scanfunc_bno and scanfunc_cnt Christoph Hellwig
2009-10-12 16:53 ` Eric Sandeen
2009-10-13 22:13 ` Christoph Hellwig
2009-10-13 23:36 ` Alex Elder
2009-09-02 17:55 ` [PATCH 02/14] repair: reduce byte swap operations in scanfunc_allocbt Christoph Hellwig
2009-10-12 17:18 ` Eric Sandeen
2009-10-13 23:37 ` [PATCH 02/14] repair: reduce byte swap operations inscanfunc_allocbt Alex Elder
2009-09-02 17:55 ` [PATCH 03/14] repair: kill B_IS_META flag Christoph Hellwig
2009-10-12 19:45 ` Eric Sandeen
2009-10-13 22:16 ` Christoph Hellwig
2009-10-13 22:19 ` Eric Sandeen
2009-10-13 23:38 ` Alex Elder
2009-09-02 17:55 ` [PATCH 04/14] repair: split up scanfunc_ino Christoph Hellwig
2009-10-12 20:06 ` Eric Sandeen
2009-10-13 22:19 ` Christoph Hellwig
2009-10-13 22:22 ` Eric Sandeen
2009-10-13 22:23 ` Christoph Hellwig
2009-09-02 17:55 ` [PATCH 05/14] repair: reduce byte swapping in scan_freelist Christoph Hellwig
2009-10-12 20:43 ` Eric Sandeen
2009-09-02 17:55 ` [PATCH 06/14] repair: use a btree instead of a radix tree for the prefetch queue Christoph Hellwig
2009-10-21 17:12 ` [PATCH 06/14] repair: use a btree instead of a radix tree for theprefetch queue Alex Elder
2009-11-12 10:04 ` Christoph Hellwig
2009-11-12 23:46 ` Dave Chinner
2009-09-02 17:55 ` [PATCH 07/14] repair: use single prefetch queue Christoph Hellwig
2009-10-21 17:48 ` Alex Elder
2009-11-12 10:09 ` Christoph Hellwig
2009-09-02 17:55 ` [PATCH 08/14] repair: clean up prefetch tracing Christoph Hellwig
2009-10-21 17:53 ` Alex Elder
2009-09-02 17:55 ` [PATCH 09/14] repair: track logical to physical block mapping more effeciently Christoph Hellwig
2009-10-21 19:06 ` [PATCH 09/14] repair: track logical to physical block mapping moreeffeciently Alex Elder
2009-11-12 10:18 ` Christoph Hellwig
2009-09-02 17:55 ` [PATCH 10/14] repair: cleanup helpers for tracking block usage Christoph Hellwig
2009-10-21 19:33 ` Alex Elder
2009-11-12 10:21 ` Christoph Hellwig
2009-09-02 17:55 ` [PATCH 11/14] repair: cleanup alloc/free/reset of the block usage tracking Christoph Hellwig
2009-10-21 20:22 ` [PATCH 11/14] repair: cleanup alloc/free/reset of the block usagetracking Alex Elder
2009-09-02 17:55 ` [PATCH 12/14] repair: switch block usage bitmap to a btree Christoph Hellwig
2009-10-22 16:22 ` Alex Elder
2009-11-12 10:25 ` Christoph Hellwig
2009-09-02 17:55 ` [PATCH 13/14] repair: optimize duplicate extent tracking Christoph Hellwig
2009-10-22 16:41 ` Alex Elder
2009-09-02 17:55 ` [PATCH 14/14] repair: add missing locking in scanfunc_bmap Christoph Hellwig
2009-10-22 16:42 ` Alex Elder
2009-09-03 20:49 ` [PATCH 00/14] repair memory usage reductions Geoffrey Wehrman
2009-09-04 2:57 ` Dave Chinner
2009-09-04 13:37 ` Geoffrey Wehrman
2009-09-04 14:51 ` Christoph Hellwig [this message]
2009-09-04 17:24 ` Michael Monnerie
2009-11-12 15:58 ` Christoph Hellwig
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