From: Dave Chinner <david@fromorbit.com>
To: Wu Fengguang <fengguang.wu@intel.com>
Cc: "linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Christoph Hellwig <hch@infradead.org>
Subject: Re: XFS/btrfs performance after IO-less dirty throttling
Date: Fri, 16 Dec 2011 15:25:08 +1100 [thread overview]
Message-ID: <20111216042508.GE23662@dastard> (raw)
In-Reply-To: <20111216015311.GA15996@localhost>
On Fri, Dec 16, 2011 at 09:53:11AM +0800, Wu Fengguang wrote:
> I'm indeed happy that you don't care that much on that regression
> introduced by me ;-)
Heh.
BTW, do these tests run to ENOSPC?
> 10829.00 +4.3% 11296.00 TOTAL xfs:xfs_delalloc_enospc
This implies that it does.
If so, I'm not sure how much we can really trust these overall
results because allocation and writeback speeds at ENOSPC is
anything but deterministic. It will certainly have an effect
(detrimental) on throughput as the filesystem gets close to full....
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
next prev parent reply other threads:[~2011-12-16 4:25 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-14 14:31 XFS/btrfs performance after IO-less dirty throttling Wu Fengguang
2011-12-14 14:59 ` Wu Fengguang
[not found] ` <20111215133137.GA14562@localhost>
2011-12-16 0:31 ` Dave Chinner
2011-12-16 1:53 ` Wu Fengguang
2011-12-16 4:25 ` Dave Chinner [this message]
2011-12-16 5:16 ` Wu Fengguang
2011-12-19 1:57 ` Dave Chinner
2011-12-19 5:44 ` Wu Fengguang
[not found] ` <20111215135250.GB14562@localhost>
2011-12-16 5:27 ` Wu Fengguang
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