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perf intel-pt: Synthesize iflag event

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Synthesize an attribute event and sample events for changes to the
interrupt flag represented by the MODE.Exec packet.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20220124084201.2699795-16-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2022-01-24 10:41:51 +02:00 committed by Arnaldo Carvalho de Melo
parent ef3b2ba964
commit 069ca70e48
1 changed files with 52 additions and 0 deletions
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52
tools/perf/util/intel-pt.c
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@ -124,6 +124,9 @@ struct intel_pt {
u64 evt_sample_type;
u64 evt_id;
u64 iflag_chg_sample_type;
u64 iflag_chg_id;
u64 tsc_bit;
u64 mtc_bit;
u64 mtc_freq_bits;
@ -2209,6 +2212,39 @@ static int intel_pt_synth_events_sample(struct intel_pt_queue *ptq)
pt->evt_sample_type);
}
static int intel_pt_synth_iflag_chg_sample(struct intel_pt_queue *ptq)
{
struct intel_pt *pt = ptq->pt;
union perf_event *event = ptq->event_buf;
struct perf_sample sample = { .ip = 0, };
struct perf_synth_intel_iflag_chg raw;
if (intel_pt_skip_event(pt))
return 0;
intel_pt_prep_p_sample(pt, ptq, event, &sample);
sample.id = ptq->pt->iflag_chg_id;
sample.stream_id = ptq->pt->iflag_chg_id;
raw.flags = 0;
raw.iflag = ptq->state->to_iflag;
if (ptq->state->type & INTEL_PT_BRANCH) {
raw.via_branch = 1;
raw.branch_ip = ptq->state->to_ip;
} else {
sample.addr = 0;
}
sample.flags = ptq->flags;
sample.raw_size = perf_synth__raw_size(raw);
sample.raw_data = perf_synth__raw_data(&raw);
return intel_pt_deliver_synth_event(pt, event, &sample,
pt->iflag_chg_sample_type);
}
static int intel_pt_synth_error(struct intel_pt *pt, int code, int cpu,
pid_t pid, pid_t tid, u64 ip, u64 timestamp)
{
@ -2321,6 +2357,11 @@ static int intel_pt_sample(struct intel_pt_queue *ptq)
if (err)
return err;
}
if (state->type & INTEL_PT_IFLAG_CHG) {
err = intel_pt_synth_iflag_chg_sample(ptq);
if (err)
return err;
}
}
if (pt->sample_pwr_events) {
@ -3531,6 +3572,17 @@ static int intel_pt_synth_events(struct intel_pt *pt,
id += 1;
}
if (pt->synth_opts.intr_events && pt->cap_event_trace) {
attr.config = PERF_SYNTH_INTEL_IFLAG_CHG;
err = intel_pt_synth_event(session, "iflag", &attr, id);
if (err)
return err;
pt->iflag_chg_sample_type = attr.sample_type;
pt->iflag_chg_id = id;
intel_pt_set_event_name(evlist, id, "iflag");
id += 1;
}
return 0;
}