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Re: [patch] Speculative prefetching

From: Andreas Jaeger <aj at suse dot de>
To: Zdenek Dvorak <rakdver at atrey dot karlin dot mff dot cuni dot cz>
Cc: gcc-patches at gcc dot gnu dot org, jh at suse dot cz
Date: Sun, 14 Mar 2004 17:47:27 +0100
Subject: Re: [patch] Speculative prefetching
References: <20040314163742.GB28990@atrey.karlin.mff.cuni.cz>

Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> writes:

>                                      Estimated                     Estimated
>                    Base      Base      Base      Peak      Peak      Peak
>    Benchmarks    Ref Time  Run Time   Ratio    Ref Time  Run Time   Ratio
>    ------------  --------  --------  --------  --------  --------  --------
>    164.gzip          1400   200       700    *     1400   195       716    *
>    181.mcf           1800   357       505    *     1800   291       618    *

Those are good improvements, mcf is excellent.

>    254.gap           1100   154       713    *     1100   158       696    *

But here we regress.  Any ideas why?  Do we add too many prefetches?
Or is it random noise?

Andreas
-- 
 Andreas Jaeger, aj@suse.de, http://www.suse.de/~aj
  SuSE Linux AG, Maxfeldstr. 5, 90409 Nürnberg, Germany
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