Stephane Eranian wrote: > On Wed, Oct 18, 2006 at 04:55:30PM -0500, Jack Steiner wrote: > > On Wed, Oct 18, 2006 at 02:44:13PM -0700, Stephane Eranian wrote: > > > Jack, > > > > > > The perfmon subsystem will not work correctly if you mix > > > Madison and Montecito in the same box. And there is not an > > > easy way to make it work with such configuration. Performance > > > counters are different between the two models. > > > > The failing case that I ran into was a mixture of rev 5 & rev 7 > > montecitos: > > Intel(r) Itanium(r) 2 Processor 1.6GHz with 24M L3 Cache for 533MHz Platforms > > Intel(r) Itanium(r) 2 Processor 1.6GHz with 18M L3 Cache for 533MHz Platforms > > > > I assume that will work ok. Right? > > > Yes, I think for this you are ok. > > > However, there is also a patch that Russ Anderson pushed last week (at least > > I think he pushed it). We are planning to support systems with mixtures of both > > madison & montecito. Sounds like we have a problem :-( > > > Yes, I recall seeing something along those lines not too long ago... http://marc.theaimsgroup.com/?l=linux-ia64&m=116070997529216&w=2 > With the existing perfmon v2.0, All the PMU description tables are compiled in. > > I think what we could do is to detect we have a mixed (family) configuration > and drop to the generic (architected) PMU with only 4 counters and 2 events. That > is, I am afraid, the best we could do. Tony's test kernel (plus Jack's patch and my patch) boots on a mixed Montecito and Madison system. Perfmon runs, though I'm not sure what to look for to tell if it is not functioning properly. --------------------- saturn2-7:~ # profile.pl --kernel-only -T 10 profile.pl: found pfmon version 3.0. profile.pl: run profile for 10 seconds. profile.pl: no_dplace=1....c_opt=. profile.pl: Samples/tick defaults to: 13940008 for event CPU_CYCLES. profile.pl: pfmon command: /usr/bin/pfmon --system-wide --smpl-outfile=/tmp/sample.out.4022 --smpl-entries=100000 -k --short-smpl-periods=13940008 --smpl-module=compact-ia64 --events=CPU_CYCLES --relative -t 10 profile.pl: Running a timed profile for 10 seconds: <session to end in 10 seconds> profile.pl: Profile complete. profile.pl: Checking the profile results. profile.pl: Merging sample files into a single file. profile.pl: my_partition_id=0 makemap_partition_id=0. profile.pl: Running the profile analyzer. profile.pl: analyze.pl kernel_only /tmp/sample.out.4022 profile.out --system-map /proc/kallsyms analyze,pl: Using /proc/kallsyms as the kernel map file. analyze.pl: Read 13679 symbols from /proc/kallsyms. analyze.pl: total observations: 1017 profile.pl: Profile results are in file: profile.out. profile.pl: Removing the sample files. profile.pl: Normal exit. saturn2-7:~ # cat profile.out user ticks: 0 0 % kernel ticks: 1017 100 % idle ticks: 1015 99.8 % Using /proc/kallsyms as the kernel map file. ==================================================================== Kernel Ticks Percent Cumulative Routine Percent -------------------------------------------------------------------- 1015 99.80 99.80 default_idle 1 0.10 99.90 get_page_from_freelist 1 0.10 100.00 hrtimer_run_queues ==================================================================== -- Russ Anderson, OS RAS/Partitioning Project Lead SGI - Silicon Graphics Inc rja@xxxxxxx - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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