I'm getting some strange samples when I try the same program on different
systems but the same Linux OS.
AMD Opt 2.5GHz 1 processor
Intel P4 3.6 Ghz 2 cores
AMD Opt 2.0 Ghz 2 cores
Repeated runs on the same machine produce the same results.
So the top three samples for Linpack result is vastly different profiles.
System #1 36.22% libat.so 35.64% Linpack 10.20% ps.so
System #2 61.39% no-vmlinux 13.86 % Linpack 15.16% libat.so
System #3 34.19% Linpack 27.96% libat.so 19.82 no-vmlinux
The runtimes for these programs is nearly identical! However the samples are
very different. vm-linux is reported for #2 and #3, but #1 does not have
any no-vmlinux samples!
As can be seen, the program has a fair amount of dynamic link library
usage. Could this be a factor for the very different profiles? Also can
hardware make such a huge difference, somehow affecting how the sample is
done? As can be seen System #1 and #3 vs #2 are very different.