Content-class: urn:content-classes:message
MIME-Version: 1.0
Content-Type: text/plain;
	charset="us-ascii"
Content-Transfer-Encoding: 8BIT
Subject: RE: [PATCH 1/1] elevator: indirect function calls reducing
Date: Wed, 30 Nov 2005 21:05:29 +0300
Message-ID: <6694B22B6436BC43B429958787E45498E7877C@mssmsx402nb>
Thread-Topic: [PATCH 1/1] elevator: indirect function calls reducing
Thread-Index: AcX1zJQjS5c+1j7zTqSkGWtrU0lfkwACVFLQ
From: "Ananiev, Leonid I" <leonid.i.ananiev@intel.com>
To: "Christoph Hellwig" <hch@infradead.org>
Cc: <linux-kernel@vger.kernel.org>, <axboe@suse.de>,
       "Arjan van de Ven" <arjan@infradead.org>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1039
Lines: 30

Christoph,
During that function calls 3 memory ridings are performed under
spin_lock and having cache miss/conflict problem;
and 2 only main memory ridings after patching.

In a source a[b][c][d](arg);
after patching number of memory ridings less by 1:
a[c][d](arg);
Do you agree with it?
Have you other explanation of performance degradation 2.6.9 -> 2.6.10?

Leonid


-----Original Message-----
From: Christoph Hellwig [mailto:hch@infradead.org] 
Sent: Wednesday, November 30, 2005 7:26 PM
To: Ananiev, Leonid I
Cc: linux-kernel@vger.kernel.org; axboe@suse.de
Subject: Re: [PATCH 1/1] elevator: indirect function calls reducing


this _still_ isn't an indirect function call reduction and people
have told you N times.  Please get your basics right first, to start
with the patch description.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/