Frank Cox wrote: > My brother just sent me this inquiry and I thought I would ask here to see if > any of you lot know anything about this before I send him a reply. > > Just checking whether you know anything about the various packages > I could use to monitor performance of code running on X86 processors. > I want to measure things like: > - instructions executed, in a block of code (ie., from here to there) > - cache misses (i-cache, d-cache, L1, L2, etc) > - processor cycles > - SSE4 instructions executed > - ... and so on. > > There appear to be at least a few packages which expose the > MSR functionality in varioius ways (e.g., the perfctr package). > I wondered if you knew which package would be considered > the 'best'. > > One unpleasant aspect of the perfctr package is that it appears > that I need to apply patches to the kernel, then rebuild; > this would appear to increase the complexity of system maintenance > (can't just update and have everything up). > The 2.6.31 and newer kernels have support to access the performance monitoring hardware on some models of x86 processors (NetBurst/P4 is NOT supports). You can access the performance counter in Fedora 12 from the command line using the perf package (a kernel sub-package). You could also write your own tools using the same systemcalls as perf. You can browse the perf code at: http://lxr.linux.no/#linux+v2.6.31/tools/perf/ -Will -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
