RE: [PATCH 1/1] elevator: indirect function calls reducing

[Ananiev, Leonid I]

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@xxxxxxxxxxxxx] 
Sent: Wednesday, November 30, 2005 7:26 PM
To: Ananiev, Leonid I
Cc: linux-kernel@xxxxxxxxxxxxxxx; axboe@xxxxxxx
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.
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