Kim Phillips c8fe99d070 perf/amd/uncore: Set all slices and threads to restore perf stat -a behaviour ... Commit 2f217d58a8 ("perf/x86/amd/uncore: Set the thread mask for F17h L3 PMCs") inadvertently changed the uncore driver's behaviour wrt perf tool invocations with or without a CPU list, specified with -C / --cpu=. Change the behaviour of the driver to assume the former all-cpu (-a) case, which is the more commonly desired default. This fixes '-a -A' invocations without explicit cpu lists (-C) to not count L3 events only on behalf of the first thread of the first core in the L3 domain. BEFORE: Activity performed by the first thread of the last core (CPU#43) in CPU#40's L3 domain is not reported by CPU#40: sudo perf stat -a -A -e l3_request_g1.caching_l3_cache_accesses taskset -c 43 perf bench mem memcpy -s 32mb -l 100 -f default ... CPU36 21,835 l3_request_g1.caching_l3_cache_accesses CPU40 87,066 l3_request_g1.caching_l3_cache_accesses CPU44 17,360 l3_request_g1.caching_l3_cache_accesses ... AFTER: The L3 domain activity is now reported by CPU#40: sudo perf stat -a -A -e l3_request_g1.caching_l3_cache_accesses taskset -c 43 perf bench mem memcpy -s 32mb -l 100 -f default ... CPU36 354,891 l3_request_g1.caching_l3_cache_accesses CPU40 1,780,870 l3_request_g1.caching_l3_cache_accesses CPU44 315,062 l3_request_g1.caching_l3_cache_accesses ... Fixes: 2f217d58a8 ("perf/x86/amd/uncore: Set the thread mask for F17h L3 PMCs") Signed-off-by: Kim Phillips <kim.phillips@amd.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20200908214740.18097-2-kim.phillips@amd.com		2020-09-10 11:19:34 +02:00
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amd	perf/amd/uncore: Set all slices and threads to restore perf stat -a behaviour	2020-09-10 11:19:34 +02:00
intel	perf/x86/intel/ds: Fix x86_pmu_stop warning for large PEBS	2020-09-10 11:19:33 +02:00
zhaoxin	x86/perf: Fix a typo	2020-07-22 10:22:08 +02:00
core.c	perf/x86/intel: Support per-thread RDPMC TopDown metrics	2020-08-18 16:34:37 +02:00
Kconfig	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
Makefile	perf/x86/rapl: Fix RAPL config variable bug	2020-06-02 11:52:56 +02:00
msr.c	perf/x86/msr: Add Tremont support	2020-02-11 13:17:50 +01:00
perf_event.h	perf/x86/intel: Support TopDown metrics on Ice Lake	2020-08-18 16:34:37 +02:00
probe.c	perf/x86/rapl: Make perf_probe_msr() more robust and flexible	2020-05-28 07:58:55 +02:00
probe.h	perf/x86: Add MSR probe interface	2019-06-24 19:28:31 +02:00
rapl.c	perf/x86/rapl: Add support for Intel SPR platform	2020-08-14 12:35:12 +02:00