Hello
I've been trying to use perfmon2 on long-running programs on the Cell
architecture (a Playstation3).
The problem is that pfmon never returns counts higher than 2^32. On
kernel 2.6.24 it seemed that the counters were just overflowing and the
virtual 64-bit counter just not updated. I updated the kernel to 2.6.26
(which was a lot of pain, turns out there is something broken with USB on
kernels more recent than 2.6.24) and the problem is changed a bit but
still there. Now the counts seem to max out at 4294967295
For example, I get results like this:
> taskset 1 pfmon -e ppc_inst_commit_th0,ppc_inst_commit_th1,cycles
> long_running_program
4294967295 PPC_INST_COMMIT_TH0
0 PPC_INST_COMMIT_TH1
4294967295 CYCLES
Is this a known problem?
Vince
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