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Date: Tue, 11 Mar 2003 11:02:35 +0100
From: Jakob Oestergaard <jakob@unthought.net>
To: "chandrasekhar.nagaraj" <chandrasekhar.nagaraj@patni.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Load Balancing Performance
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On Tue, Mar 11, 2003 at 03:28:14PM +0530, chandrasekhar.nagaraj wrote:
> Hi,
> 
...
> But instead of path switching for every buffer head (on call of make
> request), if we switch after  50 buffer heads(ie. after 50 times make
> request is called) then it results in a better  performance.
> Is there any way to find out the optimum value so that the performance is
> optimum.
> The performance is not good only when load balancing is ON. Hence we need
> performance improvement  in the case of load balancing.
> Or is there any other solution to this problem.

Make the request site tunable via. procfs.

Then create a (user space) utility which experiments with various
request sizes and finds the optimum.  Run the tuning program once every
time you set up a new system or change hardware.

-- 
................................................................
:   jakob@unthought.net   : And I see the elder races,         :
:.........................: putrid forms of man                :
:   Jakob ?stergaard      : See him rise and claim the earth,  :
:        OZ9ABN           : his downfall is at hand.           :
:.........................:............{Konkhra}...............:
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