From: Vivek Goyal <vgoyal@redhat.com>
To: Wu Fengguang <fengguang.wu@intel.com>
Cc: linux-fsdevel@vger.kernel.org, Jan Kara <jack@suse.cz>,
Dave Chinner <david@fromorbit.com>,
Christoph Hellwig <hch@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
Li Shaohua <shaohua.li@intel.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 3/9] writeback: bdi write bandwidth estimation
Date: Fri, 1 Jul 2011 15:29:15 -0400 [thread overview]
Message-ID: <20110701192915.GE28563@redhat.com> (raw)
In-Reply-To: <20110629145553.906668553@intel.com>
On Wed, Jun 29, 2011 at 10:52:48PM +0800, Wu Fengguang wrote:
> The estimation value will start from 100MB/s and adapt to the real
> bandwidth in seconds.
>
> It tries to update the bandwidth only when disk is fully utilized.
> Any inactive period of more than one second will be skipped.
Is this piece of code being tested in your graphs? Are there any
inactive periods which get filtered out in your workload? I am
assuming in a continuous dd, we will not have periods of inactivity
1 second long.
Thanks
Vivek
next prev parent reply other threads:[~2011-07-01 19:29 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-29 14:52 [PATCH 0/9] write bandwidth estimation and writeback fixes v2 Wu Fengguang
2011-06-29 14:52 ` [PATCH 1/9] writeback: make writeback_control.nr_to_write straight Wu Fengguang
2011-06-30 16:24 ` Jan Kara
2011-07-01 12:03 ` Wu Fengguang
2011-06-29 14:52 ` [PATCH 2/9] writeback: account per-bdi accumulated written pages Wu Fengguang
2011-06-29 14:52 ` [PATCH 3/9] writeback: bdi write bandwidth estimation Wu Fengguang
2011-06-30 19:56 ` Jan Kara
2011-07-01 14:58 ` Wu Fengguang
2011-07-04 3:05 ` Wu Fengguang
2011-07-13 23:30 ` Jan Kara
2011-07-23 7:26 ` Wu Fengguang
2011-07-01 15:20 ` Andrea Righi
2011-07-08 11:53 ` Wu Fengguang
2011-07-01 18:32 ` Vivek Goyal
2011-07-23 8:02 ` Wu Fengguang
2011-07-01 19:19 ` Vivek Goyal
2011-07-01 19:29 ` Vivek Goyal [this message]
2011-07-23 8:07 ` Wu Fengguang
2011-06-29 14:52 ` [PATCH 4/9] writeback: show bdi write bandwidth in debugfs Wu Fengguang
2011-06-29 14:52 ` [PATCH 5/9] writeback: consolidate variable names in balance_dirty_pages() Wu Fengguang
2011-06-30 17:26 ` Jan Kara
2011-06-29 14:52 ` [PATCH 6/9] writeback: introduce smoothed global dirty limit Wu Fengguang
2011-07-01 15:20 ` Andrea Righi
2011-07-08 11:51 ` Wu Fengguang
2011-06-29 14:52 ` [PATCH 7/9] writeback: introduce max-pause and pass-good dirty limits Wu Fengguang
2011-06-29 14:52 ` [PATCH 8/9] writeback: scale IO chunk size up to half device bandwidth Wu Fengguang
2011-06-29 14:52 ` [PATCH 9/9] writeback: trace global_dirty_state Wu Fengguang
2011-07-01 15:18 ` Christoph Hellwig
2011-07-01 15:45 ` Wu Fengguang
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