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Re: 1.02 g77 link problem
- To: rowe at excc dot ex dot ac dot uk
- Subject: Re: 1.02 g77 link problem
- From: Jeffrey A Law <law at cygnus dot com>
- Date: Mon, 06 Apr 1998 22:34:22 -0600
- cc: egcs-bugs at cygnus dot com
- Reply-To: law at cygnus dot com
In message <11396.199804061928@watt.ex.ac.uk.ex.ac.uk>you write:
> The value in parentheses is the sample result printed out, the others
> are the timings. As you can see, we get the same result each time but
> the version linked under 1.02 is slower. I get much the same result if
> I halve n and and nv2 so I can't think it's a problem with one version
> just failing to fit into second level cache level.
>
> I have to say that I find the idea of the same object file running
> differently rather worrying..
Could be differences in libgcc.a
It might even be the case that differences in libgcc.a have moved
things in the data seg such that some of your arrays are not
aligned "well", thus the weird performance characteristics.
jeff