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-rw-r--r--tools/perf/builtin-record.c3
-rw-r--r--tools/perf/builtin-top.c12
-rw-r--r--tools/perf/util/parse-events.c4
3 files changed, 15 insertions, 4 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 3b8b6387c47c..bed175d59e55 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -284,7 +284,8 @@ try_again:
int err = errno;
if (err == EPERM || err == EACCES)
- die("Permission error - are you root?\n");
+ die("Permission error - are you root?\n"
+ "\t Consider tweaking /proc/sys/kernel/perf_event_paranoid.\n");
else if (err == ENODEV && profile_cpu != -1)
die("No such device - did you specify an out-of-range profile CPU?\n");
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 0b719e3dde05..ec4822322abd 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -411,6 +411,7 @@ static double sym_weight(const struct sym_entry *sym)
static long samples;
static long userspace_samples;
+static long exact_samples;
static const char CONSOLE_CLEAR[] = "";
static void __list_insert_active_sym(struct sym_entry *syme)
@@ -451,6 +452,7 @@ static void print_sym_table(void)
int counter, snap = !display_weighted ? sym_counter : 0;
float samples_per_sec = samples/delay_secs;
float ksamples_per_sec = (samples-userspace_samples)/delay_secs;
+ float esamples_percent = (100.0*exact_samples)/samples;
float sum_ksamples = 0.0;
struct sym_entry *syme, *n;
struct rb_root tmp = RB_ROOT;
@@ -458,7 +460,7 @@ static void print_sym_table(void)
int sym_width = 0, dso_width = 0, max_dso_width;
const int win_width = winsize.ws_col - 1;
- samples = userspace_samples = 0;
+ samples = userspace_samples = exact_samples = 0;
/* Sort the active symbols */
pthread_mutex_lock(&active_symbols_lock);
@@ -489,9 +491,10 @@ static void print_sym_table(void)
puts(CONSOLE_CLEAR);
printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
- printf( " PerfTop:%8.0f irqs/sec kernel:%4.1f%% [",
+ printf( " PerfTop:%8.0f irqs/sec kernel:%4.1f%% exact: %4.1f%% [",
samples_per_sec,
- 100.0 - (100.0*((samples_per_sec-ksamples_per_sec)/samples_per_sec)));
+ 100.0 - (100.0*((samples_per_sec-ksamples_per_sec)/samples_per_sec)),
+ esamples_percent);
if (nr_counters == 1 || !display_weighted) {
printf("%Ld", (u64)attrs[0].sample_period);
@@ -955,6 +958,9 @@ static void event__process_sample(const event_t *self,
return;
}
+ if (self->header.misc & PERF_RECORD_MISC_EXACT)
+ exact_samples++;
+
if (event__preprocess_sample(self, session, &al, symbol_filter) < 0 ||
al.filtered)
return;
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 05d0c5c2030c..a2014459125a 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -656,6 +656,10 @@ parse_raw_event(const char **strp, struct perf_event_attr *attr)
return EVT_FAILED;
n = hex2u64(str + 1, &config);
if (n > 0) {
+ if (str[n+1] == 'p') {
+ attr->precise = 1;
+ n++;
+ }
*strp = str + n + 1;
attr->type = PERF_TYPE_RAW;
attr->config = config;
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