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-rw-r--r--tools/perf/util/evsel.c156
1 files changed, 92 insertions, 64 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 2f9e68025ede..1e90c8557ede 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -658,9 +658,22 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
attr->mmap_data = track;
}
+ /*
+ * We don't allow user space callchains for function trace
+ * event, due to issues with page faults while tracing page
+ * fault handler and its overall trickiness nature.
+ */
+ if (perf_evsel__is_function_event(evsel))
+ evsel->attr.exclude_callchain_user = 1;
+
if (callchain_param.enabled && !evsel->no_aux_samples)
perf_evsel__config_callgraph(evsel);
+ if (opts->sample_intr_regs) {
+ attr->sample_regs_intr = PERF_REGS_MASK;
+ perf_evsel__set_sample_bit(evsel, REGS_INTR);
+ }
+
if (target__has_cpu(&opts->target))
perf_evsel__set_sample_bit(evsel, CPU);
@@ -853,8 +866,6 @@ void perf_evsel__exit(struct perf_evsel *evsel)
perf_evsel__free_id(evsel);
close_cgroup(evsel->cgrp);
zfree(&evsel->group_name);
- if (evsel->tp_format)
- pevent_free_format(evsel->tp_format);
zfree(&evsel->name);
perf_evsel__object.fini(evsel);
}
@@ -865,9 +876,8 @@ void perf_evsel__delete(struct perf_evsel *evsel)
free(evsel);
}
-static inline void compute_deltas(struct perf_evsel *evsel,
- int cpu,
- struct perf_counts_values *count)
+void perf_evsel__compute_deltas(struct perf_evsel *evsel, int cpu,
+ struct perf_counts_values *count)
{
struct perf_counts_values tmp;
@@ -887,81 +897,60 @@ static inline void compute_deltas(struct perf_evsel *evsel,
count->run = count->run - tmp.run;
}
-int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
- int cpu, int thread, bool scale)
+void perf_counts_values__scale(struct perf_counts_values *count,
+ bool scale, s8 *pscaled)
{
- struct perf_counts_values count;
- size_t nv = scale ? 3 : 1;
-
- if (FD(evsel, cpu, thread) < 0)
- return -EINVAL;
-
- if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1) < 0)
- return -ENOMEM;
-
- if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0)
- return -errno;
-
- compute_deltas(evsel, cpu, &count);
+ s8 scaled = 0;
if (scale) {
- if (count.run == 0)
- count.val = 0;
- else if (count.run < count.ena)
- count.val = (u64)((double)count.val * count.ena / count.run + 0.5);
+ if (count->run == 0) {
+ scaled = -1;
+ count->val = 0;
+ } else if (count->run < count->ena) {
+ scaled = 1;
+ count->val = (u64)((double) count->val * count->ena / count->run + 0.5);
+ }
} else
- count.ena = count.run = 0;
+ count->ena = count->run = 0;
- evsel->counts->cpu[cpu] = count;
- return 0;
+ if (pscaled)
+ *pscaled = scaled;
}
-int __perf_evsel__read(struct perf_evsel *evsel,
- int ncpus, int nthreads, bool scale)
+int perf_evsel__read_cb(struct perf_evsel *evsel, int cpu, int thread,
+ perf_evsel__read_cb_t cb)
{
- size_t nv = scale ? 3 : 1;
- int cpu, thread;
- struct perf_counts_values *aggr = &evsel->counts->aggr, count;
+ struct perf_counts_values count;
- if (evsel->system_wide)
- nthreads = 1;
+ memset(&count, 0, sizeof(count));
- aggr->val = aggr->ena = aggr->run = 0;
+ if (FD(evsel, cpu, thread) < 0)
+ return -EINVAL;
- for (cpu = 0; cpu < ncpus; cpu++) {
- for (thread = 0; thread < nthreads; thread++) {
- if (FD(evsel, cpu, thread) < 0)
- continue;
+ if (readn(FD(evsel, cpu, thread), &count, sizeof(count)) < 0)
+ return -errno;
- if (readn(FD(evsel, cpu, thread),
- &count, nv * sizeof(u64)) < 0)
- return -errno;
+ return cb(evsel, cpu, thread, &count);
+}
- aggr->val += count.val;
- if (scale) {
- aggr->ena += count.ena;
- aggr->run += count.run;
- }
- }
- }
+int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
+ int cpu, int thread, bool scale)
+{
+ struct perf_counts_values count;
+ size_t nv = scale ? 3 : 1;
- compute_deltas(evsel, -1, aggr);
+ if (FD(evsel, cpu, thread) < 0)
+ return -EINVAL;
- evsel->counts->scaled = 0;
- if (scale) {
- if (aggr->run == 0) {
- evsel->counts->scaled = -1;
- aggr->val = 0;
- return 0;
- }
+ if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1) < 0)
+ return -ENOMEM;
- if (aggr->run < aggr->ena) {
- evsel->counts->scaled = 1;
- aggr->val = (u64)((double)aggr->val * aggr->ena / aggr->run + 0.5);
- }
- } else
- aggr->ena = aggr->run = 0;
+ if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0)
+ return -errno;
+ perf_evsel__compute_deltas(evsel, cpu, &count);
+ perf_counts_values__scale(&count, scale, NULL);
+ evsel->counts->cpu[cpu] = count;
return 0;
}
@@ -1039,6 +1028,7 @@ static size_t perf_event_attr__fprintf(struct perf_event_attr *attr, FILE *fp)
ret += PRINT_ATTR_X64(branch_sample_type);
ret += PRINT_ATTR_X64(sample_regs_user);
ret += PRINT_ATTR_U32(sample_stack_user);
+ ret += PRINT_ATTR_X64(sample_regs_intr);
ret += fprintf(fp, "%.60s\n", graph_dotted_line);
@@ -1538,6 +1528,23 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
array++;
}
+ data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE;
+ if (type & PERF_SAMPLE_REGS_INTR) {
+ OVERFLOW_CHECK_u64(array);
+ data->intr_regs.abi = *array;
+ array++;
+
+ if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) {
+ u64 mask = evsel->attr.sample_regs_intr;
+
+ sz = hweight_long(mask) * sizeof(u64);
+ OVERFLOW_CHECK(array, sz, max_size);
+ data->intr_regs.mask = mask;
+ data->intr_regs.regs = (u64 *)array;
+ array = (void *)array + sz;
+ }
+ }
+
return 0;
}
@@ -1633,6 +1640,16 @@ size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
if (type & PERF_SAMPLE_TRANSACTION)
result += sizeof(u64);
+ if (type & PERF_SAMPLE_REGS_INTR) {
+ if (sample->intr_regs.abi) {
+ result += sizeof(u64);
+ sz = hweight_long(sample->intr_regs.mask) * sizeof(u64);
+ result += sz;
+ } else {
+ result += sizeof(u64);
+ }
+ }
+
return result;
}
@@ -1811,6 +1828,17 @@ int perf_event__synthesize_sample(union perf_event *event, u64 type,
array++;
}
+ if (type & PERF_SAMPLE_REGS_INTR) {
+ if (sample->intr_regs.abi) {
+ *array++ = sample->intr_regs.abi;
+ sz = hweight_long(sample->intr_regs.mask) * sizeof(u64);
+ memcpy(array, sample->intr_regs.regs, sz);
+ array = (void *)array + sz;
+ } else {
+ *array++ = 0;
+ }
+ }
+
return 0;
}
@@ -1940,7 +1968,7 @@ static int sample_type__fprintf(FILE *fp, bool *first, u64 value)
bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU),
bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW),
bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
- bit_name(IDENTIFIER),
+ bit_name(IDENTIFIER), bit_name(REGS_INTR),
{ .name = NULL, }
};
#undef bit_name
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-17 19:01:30 +0300