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Re: benchmarking - it's now all(-1,0,1,5,6)% faster

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From:
Leopold Toetsch
Date:
January 12, 2003 11:12
Subject:
Re: benchmarking - it's now all(-1,0,1,5,6)% faster
Message ID:
3E213830.4080307@toetsch.at
Andreas J. Koenig wrote:

>>>>>>On Sat, 11 Jan 2003 22:26:39 +0100, Leopold Toetsch <lt@toetsch.at> said:
>>>>>>
> 
>   > Nicholas Clark wrote:
>  >> So I'm confused. It looks like some bits of perl are incredibly sensitive to
>  >> cache alignment, or something similar.
> 
>   > This reminds me on my remarks on JITed mops.pasm which variied ~50%
> 
> And it reminds me on my postings to p5p about glibc being very buggy
> up to 2.3 (posted during last October). I came to the conclusion that
> perl cannot be benchmarked at all with glibc before v2.3.

There might be additional problems with glibc, but the deviations in JIT 
code timings are only caused by moving the loop by on byte (crossing a 8 
byte boundary).

leo
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