I've recently been looking at Callgrind and Cachegrind output. I've found
that both tools generate an Ir count. From what I've found in the
Valgrind documentation and on the Web, the Ir count is the number of
instructions executed (instructions read). Thus, I would expect Callgrind
and Cachegrind to generate the same Ir count; however, I've found that
they give different values. Can some explain exactly what the Callgrind
and Cachegrind Ir counts are and why their values differ? I'm using the
Valgrind 3.6.1 that comes with openSUSE 12.1 if that make any difference.
Thanks,
Geoff Alexander, Ph.D.
Software Engineer, Corporate Tools Development
IBM Corporation
RTP, NC
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