summaryrefslogtreecommitdiff
path: root/tools/perf/util/evsel.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/perf/util/evsel.c')
-rw-r--r--tools/perf/util/evsel.c164
1 files changed, 60 insertions, 104 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 738ce22..52c7d88 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -226,7 +226,8 @@ struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx)
perf_evsel__init(evsel, attr, idx);
if (perf_evsel__is_bpf_output(evsel)) {
- evsel->attr.sample_type |= PERF_SAMPLE_RAW;
+ evsel->attr.sample_type |= (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
+ PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
evsel->attr.sample_period = 1;
}
@@ -561,10 +562,9 @@ int perf_evsel__group_desc(struct perf_evsel *evsel, char *buf, size_t size)
return ret;
}
-static void
-perf_evsel__config_callgraph(struct perf_evsel *evsel,
- struct record_opts *opts,
- struct callchain_param *param)
+void perf_evsel__config_callchain(struct perf_evsel *evsel,
+ struct record_opts *opts,
+ struct callchain_param *param)
{
bool function = perf_evsel__is_function_event(evsel);
struct perf_event_attr *attr = &evsel->attr;
@@ -704,7 +704,7 @@ static void apply_config_terms(struct perf_evsel *evsel,
/* set perf-event callgraph */
if (param.enabled)
- perf_evsel__config_callgraph(evsel, opts, &param);
+ perf_evsel__config_callchain(evsel, opts, &param);
}
}
@@ -736,7 +736,8 @@ static void apply_config_terms(struct perf_evsel *evsel,
* enable/disable events specifically, as there's no
* initial traced exec call.
*/
-void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
+void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts,
+ struct callchain_param *callchain)
{
struct perf_evsel *leader = evsel->leader;
struct perf_event_attr *attr = &evsel->attr;
@@ -811,8 +812,8 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
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, opts, &callchain_param);
+ if (callchain && callchain->enabled && !evsel->no_aux_samples)
+ perf_evsel__config_callchain(evsel, opts, callchain);
if (opts->sample_intr_regs) {
attr->sample_regs_intr = opts->sample_intr_regs;
@@ -826,7 +827,7 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
perf_evsel__set_sample_bit(evsel, PERIOD);
/*
- * When the user explicitely disabled time don't force it here.
+ * When the user explicitly disabled time don't force it here.
*/
if (opts->sample_time &&
(!perf_missing_features.sample_id_all &&
@@ -1230,6 +1231,21 @@ static void __p_sample_type(char *buf, size_t size, u64 value)
__p_bits(buf, size, value, bits);
}
+static void __p_branch_sample_type(char *buf, size_t size, u64 value)
+{
+#define bit_name(n) { PERF_SAMPLE_BRANCH_##n, #n }
+ struct bit_names bits[] = {
+ bit_name(USER), bit_name(KERNEL), bit_name(HV), bit_name(ANY),
+ bit_name(ANY_CALL), bit_name(ANY_RETURN), bit_name(IND_CALL),
+ bit_name(ABORT_TX), bit_name(IN_TX), bit_name(NO_TX),
+ bit_name(COND), bit_name(CALL_STACK), bit_name(IND_JUMP),
+ bit_name(CALL), bit_name(NO_FLAGS), bit_name(NO_CYCLES),
+ { .name = NULL, }
+ };
+#undef bit_name
+ __p_bits(buf, size, value, bits);
+}
+
static void __p_read_format(char *buf, size_t size, u64 value)
{
#define bit_name(n) { PERF_FORMAT_##n, #n }
@@ -1248,6 +1264,7 @@ static void __p_read_format(char *buf, size_t size, u64 value)
#define p_unsigned(val) snprintf(buf, BUF_SIZE, "%"PRIu64, (uint64_t)(val))
#define p_signed(val) snprintf(buf, BUF_SIZE, "%"PRId64, (int64_t)(val))
#define p_sample_type(val) __p_sample_type(buf, BUF_SIZE, val)
+#define p_branch_sample_type(val) __p_branch_sample_type(buf, BUF_SIZE, val)
#define p_read_format(val) __p_read_format(buf, BUF_SIZE, val)
#define PRINT_ATTRn(_n, _f, _p) \
@@ -1299,12 +1316,13 @@ int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
PRINT_ATTRf(comm_exec, p_unsigned);
PRINT_ATTRf(use_clockid, p_unsigned);
PRINT_ATTRf(context_switch, p_unsigned);
+ PRINT_ATTRf(write_backward, p_unsigned);
PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events, p_unsigned);
PRINT_ATTRf(bp_type, p_unsigned);
PRINT_ATTRn("{ bp_addr, config1 }", bp_addr, p_hex);
PRINT_ATTRn("{ bp_len, config2 }", bp_len, p_hex);
- PRINT_ATTRf(branch_sample_type, p_unsigned);
+ PRINT_ATTRf(branch_sample_type, p_branch_sample_type);
PRINT_ATTRf(sample_regs_user, p_hex);
PRINT_ATTRf(sample_stack_user, p_unsigned);
PRINT_ATTRf(clockid, p_signed);
@@ -2253,98 +2271,11 @@ u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample,
return 0;
}
-static int comma_fprintf(FILE *fp, bool *first, const char *fmt, ...)
-{
- va_list args;
- int ret = 0;
-
- if (!*first) {
- ret += fprintf(fp, ",");
- } else {
- ret += fprintf(fp, ":");
- *first = false;
- }
-
- va_start(args, fmt);
- ret += vfprintf(fp, fmt, args);
- va_end(args);
- return ret;
-}
-
-static int __print_attr__fprintf(FILE *fp, const char *name, const char *val, void *priv)
-{
- return comma_fprintf(fp, (bool *)priv, " %s: %s", name, val);
-}
-
-int perf_evsel__fprintf(struct perf_evsel *evsel,
- struct perf_attr_details *details, FILE *fp)
-{
- bool first = true;
- int printed = 0;
-
- if (details->event_group) {
- struct perf_evsel *pos;
-
- if (!perf_evsel__is_group_leader(evsel))
- return 0;
-
- if (evsel->nr_members > 1)
- printed += fprintf(fp, "%s{", evsel->group_name ?: "");
-
- printed += fprintf(fp, "%s", perf_evsel__name(evsel));
- for_each_group_member(pos, evsel)
- printed += fprintf(fp, ",%s", perf_evsel__name(pos));
-
- if (evsel->nr_members > 1)
- printed += fprintf(fp, "}");
- goto out;
- }
-
- printed += fprintf(fp, "%s", perf_evsel__name(evsel));
-
- if (details->verbose) {
- printed += perf_event_attr__fprintf(fp, &evsel->attr,
- __print_attr__fprintf, &first);
- } else if (details->freq) {
- const char *term = "sample_freq";
-
- if (!evsel->attr.freq)
- term = "sample_period";
-
- printed += comma_fprintf(fp, &first, " %s=%" PRIu64,
- term, (u64)evsel->attr.sample_freq);
- }
-
- if (details->trace_fields) {
- struct format_field *field;
-
- if (evsel->attr.type != PERF_TYPE_TRACEPOINT) {
- printed += comma_fprintf(fp, &first, " (not a tracepoint)");
- goto out;
- }
-
- field = evsel->tp_format->format.fields;
- if (field == NULL) {
- printed += comma_fprintf(fp, &first, " (no trace field)");
- goto out;
- }
-
- printed += comma_fprintf(fp, &first, " trace_fields: %s", field->name);
-
- field = field->next;
- while (field) {
- printed += comma_fprintf(fp, &first, "%s", field->name);
- field = field->next;
- }
- }
-out:
- fputc('\n', fp);
- return ++printed;
-}
-
bool perf_evsel__fallback(struct perf_evsel *evsel, int err,
char *msg, size_t msgsize)
{
+ int paranoid;
+
if ((err == ENOENT || err == ENXIO || err == ENODEV) &&
evsel->attr.type == PERF_TYPE_HARDWARE &&
evsel->attr.config == PERF_COUNT_HW_CPU_CYCLES) {
@@ -2364,6 +2295,22 @@ bool perf_evsel__fallback(struct perf_evsel *evsel, int err,
zfree(&evsel->name);
return true;
+ } else if (err == EACCES && !evsel->attr.exclude_kernel &&
+ (paranoid = perf_event_paranoid()) > 1) {
+ const char *name = perf_evsel__name(evsel);
+ char *new_name;
+
+ if (asprintf(&new_name, "%s%su", name, strchr(name, ':') ? "" : ":") < 0)
+ return false;
+
+ if (evsel->name)
+ free(evsel->name);
+ evsel->name = new_name;
+ scnprintf(msg, msgsize,
+"kernel.perf_event_paranoid=%d, trying to fall back to excluding kernel samples", paranoid);
+ evsel->attr.exclude_kernel = 1;
+
+ return true;
}
return false;
@@ -2382,12 +2329,13 @@ int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target,
"Consider tweaking /proc/sys/kernel/perf_event_paranoid,\n"
"which controls use of the performance events system by\n"
"unprivileged users (without CAP_SYS_ADMIN).\n\n"
- "The default value is 1:\n\n"
+ "The current value is %d:\n\n"
" -1: Allow use of (almost) all events by all users\n"
">= 0: Disallow raw tracepoint access by users without CAP_IOC_LOCK\n"
">= 1: Disallow CPU event access by users without CAP_SYS_ADMIN\n"
">= 2: Disallow kernel profiling by users without CAP_SYS_ADMIN",
- target->system_wide ? "system-wide " : "");
+ target->system_wide ? "system-wide " : "",
+ perf_event_paranoid());
case ENOENT:
return scnprintf(msg, size, "The %s event is not supported.",
perf_evsel__name(evsel));
@@ -2397,10 +2345,18 @@ int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target,
"Probably the maximum number of open file descriptors has been reached.\n"
"Hint: Try again after reducing the number of events.\n"
"Hint: Try increasing the limit with 'ulimit -n <limit>'");
+ case ENOMEM:
+ if ((evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN) != 0 &&
+ access("/proc/sys/kernel/perf_event_max_stack", F_OK) == 0)
+ return scnprintf(msg, size,
+ "Not enough memory to setup event with callchain.\n"
+ "Hint: Try tweaking /proc/sys/kernel/perf_event_max_stack\n"
+ "Hint: Current value: %d", sysctl_perf_event_max_stack);
+ break;
case ENODEV:
if (target->cpu_list)
return scnprintf(msg, size, "%s",
- "No such device - did you specify an out-of-range profile CPU?\n");
+ "No such device - did you specify an out-of-range profile CPU?");
break;
case EOPNOTSUPP:
if (evsel->attr.precise_ip)
@@ -2432,7 +2388,7 @@ int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target,
return scnprintf(msg, size,
"The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
"/bin/dmesg may provide additional information.\n"
- "No CONFIG_PERF_EVENTS=y kernel support configured?\n",
+ "No CONFIG_PERF_EVENTS=y kernel support configured?",
err, strerror_r(err, sbuf, sizeof(sbuf)),
perf_evsel__name(evsel));
}
generated by cgit v0.10.2 at 2024-10-01 01:07:48 (GMT)