mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-10-01 14:44:12 +00:00
Code Issues Releases Wiki Activity

perf arm-spe: Add SPE total latency as PERF_SAMPLE_WEIGHT

Browse source 
Use total latency info in the SPE counter packet as sample weight so
that we can see it in local_weight and (global) weight sort keys.

Maybe we can use PERF_SAMPLE_WEIGHT_STRUCT to support ins_lat as well
but I'm not sure which latency it matches.  So just adding total latency
first.

Reviewed-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20211201220855.1260688-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2021-12-01 14:08:55 -08:00 committed by Arnaldo Carvalho de Melo
parent f0a29c9647
commit b0fde9c6e2
3 changed files with 7 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
tools/perf/util/arm-spe-decoder/arm-spe-decoder.c
View file

@ -179,6 +179,8 @@ static int arm_spe_read_record(struct arm_spe_decoder *decoder)
decoder->record.phys_addr = ip;
break;
case ARM_SPE_COUNTER:
if (idx == SPE_CNT_PKT_HDR_INDEX_TOTAL_LAT)
decoder->record.latency = payload;
break;
case ARM_SPE_CONTEXT:
decoder->record.context_id = payload;

1
tools/perf/util/arm-spe-decoder/arm-spe-decoder.h
View file

@ -33,6 +33,7 @@ struct arm_spe_record {
enum arm_spe_sample_type type;
int err;
u32 op;
u32 latency;
u64 from_ip;
u64 to_ip;
u64 timestamp;

5
tools/perf/util/arm-spe.c
View file

@ -330,6 +330,7 @@ static int arm_spe__synth_mem_sample(struct arm_spe_queue *speq,
sample.addr = record->virt_addr;
sample.phys_addr = record->phys_addr;
sample.data_src = data_src;
sample.weight = record->latency;
return arm_spe_deliver_synth_event(spe, speq, event, &sample);
}
@ -347,6 +348,7 @@ static int arm_spe__synth_branch_sample(struct arm_spe_queue *speq,
sample.id = spe_events_id;
sample.stream_id = spe_events_id;
sample.addr = record->to_ip;
sample.weight = record->latency;
return arm_spe_deliver_synth_event(spe, speq, event, &sample);
}
@ -993,7 +995,8 @@ arm_spe_synth_events(struct arm_spe *spe, struct perf_session *session)
attr.type = PERF_TYPE_HARDWARE;
attr.sample_type = evsel->core.attr.sample_type & PERF_SAMPLE_MASK;
attr.sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID |
PERF_SAMPLE_PERIOD | PERF_SAMPLE_DATA_SRC;
PERF_SAMPLE_PERIOD | PERF_SAMPLE_DATA_SRC |
PERF_SAMPLE_WEIGHT;
if (spe->timeless_decoding)
attr.sample_type &= ~(u64)PERF_SAMPLE_TIME;
else