Re: Need long memory trace (Michael Tiomkin)
3 Dec 2003 20:20:39 -0500

          From comp.compilers

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Need long memory trace (Rob) (2003-11-21)
Re: Need long memory trace (2003-12-03)
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From: (Michael Tiomkin)
Newsgroups: comp.compilers
Date: 3 Dec 2003 20:20:39 -0500
References: 03-11-093
Keywords: storage, testing
Posted-Date: 03 Dec 2003 20:20:39 EST

Rob <> wrote in message news:03-11-093...
> I need some help trying to find a memory address trace of length 10M
> or more, It can be from any application program, but should be
> addresses captured with caches disabled. I have been searching google
> for an example with no luck.

    I did this many years ago, for trace-based compiler optimizations.
I think I used a single-step trace, analyzing the instructions
and computing the addresses of loads/stores. This was very easy.
It was a RISC machine, and the instructions were very simple,
but I'm sure that for x86 you can find an external program
for analyzing instructions.
    Disabling the caches doesn't matter anything in this case,
unless you want to use hardware tracing. And hardware
tracing is usually very expensive.

    BTW, 10M is a very short memory trace. If your program accesses
memory every 5 instructions (for x86 this should be 2!), it represents
several milliseconds of CPU time.

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