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-rw-r--r--tools/perf/util/evsel.c103
1 files changed, 96 insertions, 7 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 5410483d5219..cdbaf9b51e42 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -9,10 +9,11 @@
#include <byteswap.h>
#include <linux/bitops.h>
-#include <api/fs/debugfs.h>
+#include <api/fs/tracing_path.h>
#include <traceevent/event-parse.h>
#include <linux/hw_breakpoint.h>
#include <linux/perf_event.h>
+#include <linux/err.h>
#include <sys/resource.h>
#include "asm/bug.h"
#include "callchain.h"
@@ -35,6 +36,7 @@ static struct {
bool cloexec;
bool clockid;
bool clockid_wrong;
+ bool lbr_flags;
} perf_missing_features;
static clockid_t clockid;
@@ -207,6 +209,7 @@ void perf_evsel__init(struct perf_evsel *evsel,
evsel->unit = "";
evsel->scale = 1.0;
evsel->evlist = NULL;
+ evsel->bpf_fd = -1;
INIT_LIST_HEAD(&evsel->node);
INIT_LIST_HEAD(&evsel->config_terms);
perf_evsel__object.init(evsel);
@@ -225,11 +228,17 @@ struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx)
return evsel;
}
+/*
+ * Returns pointer with encoded error via <linux/err.h> interface.
+ */
struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx)
{
struct perf_evsel *evsel = zalloc(perf_evsel__object.size);
+ int err = -ENOMEM;
- if (evsel != NULL) {
+ if (evsel == NULL) {
+ goto out_err;
+ } else {
struct perf_event_attr attr = {
.type = PERF_TYPE_TRACEPOINT,
.sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
@@ -240,8 +249,10 @@ struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int
goto out_free;
evsel->tp_format = trace_event__tp_format(sys, name);
- if (evsel->tp_format == NULL)
+ if (IS_ERR(evsel->tp_format)) {
+ err = PTR_ERR(evsel->tp_format);
goto out_free;
+ }
event_attr_init(&attr);
attr.config = evsel->tp_format->id;
@@ -254,7 +265,8 @@ struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int
out_free:
zfree(&evsel->name);
free(evsel);
- return NULL;
+out_err:
+ return ERR_PTR(err);
}
const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = {
@@ -563,7 +575,9 @@ perf_evsel__config_callgraph(struct perf_evsel *evsel,
} else {
perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER |
- PERF_SAMPLE_BRANCH_CALL_STACK;
+ PERF_SAMPLE_BRANCH_CALL_STACK |
+ PERF_SAMPLE_BRANCH_NO_CYCLES |
+ PERF_SAMPLE_BRANCH_NO_FLAGS;
}
} else
pr_warning("Cannot use LBR callstack with branch stack. "
@@ -642,6 +656,15 @@ static void apply_config_terms(struct perf_evsel *evsel,
case PERF_EVSEL__CONFIG_TERM_STACK_USER:
dump_size = term->val.stack_user;
break;
+ case PERF_EVSEL__CONFIG_TERM_INHERIT:
+ /*
+ * attr->inherit should has already been set by
+ * perf_evsel__config. If user explicitly set
+ * inherit using config terms, override global
+ * opt->no_inherit setting.
+ */
+ attr->inherit = term->val.inherit ? 1 : 0;
+ break;
default:
break;
}
@@ -872,6 +895,9 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
attr->clockid = opts->clockid;
}
+ if (evsel->precise_max)
+ perf_event_attr__set_max_precise_ip(attr);
+
/*
* Apply event specific term settings,
* it overloads any global configuration.
@@ -958,13 +984,26 @@ int perf_evsel__append_filter(struct perf_evsel *evsel,
return -1;
}
-int perf_evsel__enable(struct perf_evsel *evsel, int ncpus, int nthreads)
+int perf_evsel__enable(struct perf_evsel *evsel)
{
+ int nthreads = thread_map__nr(evsel->threads);
+ int ncpus = cpu_map__nr(evsel->cpus);
+
return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
PERF_EVENT_IOC_ENABLE,
0);
}
+int perf_evsel__disable(struct perf_evsel *evsel)
+{
+ int nthreads = thread_map__nr(evsel->threads);
+ int ncpus = cpu_map__nr(evsel->cpus);
+
+ return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
+ PERF_EVENT_IOC_DISABLE,
+ 0);
+}
+
int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
{
if (ncpus == 0 || nthreads == 0)
@@ -1168,7 +1207,8 @@ static void __p_sample_type(char *buf, size_t size, 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(REGS_INTR),
+ bit_name(IDENTIFIER), bit_name(REGS_INTR), bit_name(DATA_SRC),
+ bit_name(WEIGHT),
{ .name = NULL, }
};
#undef bit_name
@@ -1249,6 +1289,7 @@ int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
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(sample_regs_user, p_hex);
PRINT_ATTRf(sample_stack_user, p_unsigned);
PRINT_ATTRf(clockid, p_signed);
@@ -1299,6 +1340,9 @@ fallback_missing_features:
evsel->attr.mmap2 = 0;
if (perf_missing_features.exclude_guest)
evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
+ if (perf_missing_features.lbr_flags)
+ evsel->attr.branch_sample_type &= ~(PERF_SAMPLE_BRANCH_NO_FLAGS |
+ PERF_SAMPLE_BRANCH_NO_CYCLES);
retry_sample_id:
if (perf_missing_features.sample_id_all)
evsel->attr.sample_id_all = 0;
@@ -1333,6 +1377,22 @@ retry_open:
err);
goto try_fallback;
}
+
+ if (evsel->bpf_fd >= 0) {
+ int evt_fd = FD(evsel, cpu, thread);
+ int bpf_fd = evsel->bpf_fd;
+
+ err = ioctl(evt_fd,
+ PERF_EVENT_IOC_SET_BPF,
+ bpf_fd);
+ if (err && errno != EEXIST) {
+ pr_err("failed to attach bpf fd %d: %s\n",
+ bpf_fd, strerror(errno));
+ err = -EINVAL;
+ goto out_close;
+ }
+ }
+
set_rlimit = NO_CHANGE;
/*
@@ -1401,6 +1461,12 @@ try_fallback:
} else if (!perf_missing_features.sample_id_all) {
perf_missing_features.sample_id_all = true;
goto retry_sample_id;
+ } else if (!perf_missing_features.lbr_flags &&
+ (evsel->attr.branch_sample_type &
+ (PERF_SAMPLE_BRANCH_NO_CYCLES |
+ PERF_SAMPLE_BRANCH_NO_FLAGS))) {
+ perf_missing_features.lbr_flags = true;
+ goto fallback_missing_features;
}
out_close:
@@ -2232,6 +2298,29 @@ int perf_evsel__fprintf(struct perf_evsel *evsel,
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;
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