Hello > > 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?
Yes. The virtual 64-bit counter has not been supported on PS3. We have a problem to support it. The kernel can't use the performance monitor interrupt like counter-overflow on PS3, because the hypervisor does not support it. So we need the polling the counter status to detect the counter-overflow. I can't make the patch soon. Sorry. Takashi Yamamoto ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ perfmon2-devel mailing list perfmon2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perfmon2-devel
