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| author | Giovanni Gherdovich <ggherdovich@suse.cz> | 2020-04-16 08:47:43 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-04-23 00:10:13 +0300 |
| commit | 23ccee22e834eca236b9a20989caf6905bd6954a (patch) | |
| tree | eef4b477b47cbcf926942e4eb7cf74799177edea /tools/perf/scripts/python/syscall-counts.py | |
| parent | 9a6c2c3c7a73ce315c57c1b002caad6fcc858d0f (diff) | |
| download | linux-23ccee22e834eca236b9a20989caf6905bd6954a.tar.xz | |
x86, sched: Account for CPUs with less than 4 cores in freq. invariance
If a CPU has less than 4 physical cores, MSR_TURBO_RATIO_LIMIT will
rightfully report that the 4C turbo ratio is zero. In such cases, use the
1C turbo ratio instead for frequency invariance calculations.
Fixes: 1567c3e3467c ("x86, sched: Add support for frequency invariance")
Reported-by: Like Xu <like.xu@linux.intel.com>
Reported-by: Neil Rickert <nwr10cst-oslnx@yahoo.com>
Signed-off-by: Giovanni Gherdovich <ggherdovich@suse.cz>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Link: https://lkml.kernel.org/r/20200416054745.740-3-ggherdovich@suse.cz
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions