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authorJin Yao <[email protected]>2021-04-27 15:01:15 +0800
committerArnaldo Carvalho de Melo <[email protected]>2021-04-29 10:30:59 -0300
commit6b64833b9e49fda28b0eb94d865c334b37b4662f (patch)
tree8c3cd5a10a21c13e83e5b9f0ce4e5cf4b2ff18c7
parent412736119116d0161688e9061485fbc3e25f78d5 (diff)
perf jevents: Support unit value "cpu_core" and "cpu_atom"
For some Intel platforms, such as Alderlake, which is a hybrid platform and it consists of atom cpu and core cpu. Each cpu has dedicated event list. Part of events are available on core cpu, part of events are available on atom cpu. The kernel exports new cpu pmus: cpu_core and cpu_atom. The event in json is added with a new field "Unit" to indicate which pmu the event is available on. For example, one event in cache.json, { "BriefDescription": "Counts the number of load ops retired that", "CollectPEBSRecord": "2", "Counter": "0,1,2,3", "EventCode": "0xd2", "EventName": "MEM_LOAD_UOPS_RETIRED_MISC.MMIO", "PEBScounters": "0,1,2,3", "SampleAfterValue": "1000003", "UMask": "0x80", "Unit": "cpu_atom" }, The unit "cpu_atom" indicates this event is only available on "cpu_atom". In generated pmu-events.c, we can see: { .name = "mem_load_uops_retired_misc.mmio", .event = "period=1000003,umask=0x80,event=0xd2", .desc = "Counts the number of load ops retired that. Unit: cpu_atom ", .topic = "cache", .pmu = "cpu_atom", }, But if without this patch, the "uncore_" prefix is added before "cpu_atom", such as: .pmu = "uncore_cpu_atom" That would be a wrong pmu. Signed-off-by: Jin Yao <[email protected]> Reviewed-by: Jiri Olsa <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Kan Liang <[email protected]> Cc: Peter Zijlstra <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
-rw-r--r--tools/perf/pmu-events/jevents.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/pmu-events/jevents.c b/tools/perf/pmu-events/jevents.c
index 33aa3c885eaf..ed4f0bd72e5a 100644
--- a/tools/perf/pmu-events/jevents.c
+++ b/tools/perf/pmu-events/jevents.c
@@ -285,6 +285,8 @@ static struct map {
{ "imx8_ddr", "imx8_ddr" },
{ "L3PMC", "amd_l3" },
{ "DFPMC", "amd_df" },
+ { "cpu_core", "cpu_core" },
+ { "cpu_atom", "cpu_atom" },
{}
};