Date: Fri, 23 Jul 2010 16:03:43 +0200
From: Heinz Diehl <htd@fancy-poultry.org>
To: Vivek Goyal <vgoyal@redhat.com>
Cc: linux-kernel@vger.kernel.org, jaxboe@fusionio.com, nauman@google.com,
        dpshah@google.com, guijianfeng@cn.fujitsu.com, jmoyer@redhat.com,
        czoccolo@gmail.com
Subject: Re: [RFC PATCH] cfq-iosched: IOPS mode for group scheduling and new
 group_idle tunable
Message-ID: <20100723140343.GA8478@fancy-poultry.org>
References: <1279834172-4227-1-git-send-email-vgoyal@redhat.com>
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On 23.07.2010, Vivek Goyal wrote: 

> This is V4 of the patchset which implements a new tunable group_idle and also
> implements IOPS mode for group fairness. Following are changes since V3.
[....]

Just for information: this patchset, applied to 2.6.35-rc6, gives about
20-25% increase in speed/throughput on my desktop system 
(Phenom 2.5GHz Quadcore, 3 disks) with the tunables set according 
to what you've used/reported here (the setup with slice_idle set to 0),
and it's measurable with fs_mark, too.

After 2 hours of hard testing, the machine remains stable and responsive.

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