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-rw-r--r--tools/perf/builtin-stat.c1886
1 files changed, 1547 insertions, 339 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index a6b4d44f950..65a151e3606 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -6,24 +6,28 @@
*
* Sample output:
- $ perf stat ~/hackbench 10
- Time: 0.104
+ $ perf stat ./hackbench 10
- Performance counter stats for '/home/mingo/hackbench':
+ Time: 0.118
- 1255.538611 task clock ticks # 10.143 CPU utilization factor
- 54011 context switches # 0.043 M/sec
- 385 CPU migrations # 0.000 M/sec
- 17755 pagefaults # 0.014 M/sec
- 3808323185 CPU cycles # 3033.219 M/sec
- 1575111190 instructions # 1254.530 M/sec
- 17367895 cache references # 13.833 M/sec
- 7674421 cache misses # 6.112 M/sec
+ Performance counter stats for './hackbench 10':
- Wall-clock time elapsed: 123.786620 msecs
+ 1708.761321 task-clock # 11.037 CPUs utilized
+ 41,190 context-switches # 0.024 M/sec
+ 6,735 CPU-migrations # 0.004 M/sec
+ 17,318 page-faults # 0.010 M/sec
+ 5,205,202,243 cycles # 3.046 GHz
+ 3,856,436,920 stalled-cycles-frontend # 74.09% frontend cycles idle
+ 1,600,790,871 stalled-cycles-backend # 30.75% backend cycles idle
+ 2,603,501,247 instructions # 0.50 insns per cycle
+ # 1.48 stalled cycles per insn
+ 484,357,498 branches # 283.455 M/sec
+ 6,388,934 branch-misses # 1.32% of all branches
+
+ 0.154822978 seconds time elapsed
*
- * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
+ * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
*
* Improvements and fixes by:
*
@@ -42,307 +46,554 @@
#include "util/util.h"
#include "util/parse-options.h"
#include "util/parse-events.h"
+#include "util/pmu.h"
#include "util/event.h"
+#include "util/evlist.h"
+#include "util/evsel.h"
#include "util/debug.h"
+#include "util/color.h"
+#include "util/stat.h"
#include "util/header.h"
#include "util/cpumap.h"
#include "util/thread.h"
+#include "util/thread_map.h"
+#include <stdlib.h>
#include <sys/prctl.h>
-#include <math.h>
#include <locale.h>
-static struct perf_event_attr default_attrs[] = {
+#define DEFAULT_SEPARATOR " "
+#define CNTR_NOT_SUPPORTED "<not supported>"
+#define CNTR_NOT_COUNTED "<not counted>"
+
+static void print_stat(int argc, const char **argv);
+static void print_counter_aggr(struct perf_evsel *counter, char *prefix);
+static void print_counter(struct perf_evsel *counter, char *prefix);
+static void print_aggr(char *prefix);
+
+/* Default events used for perf stat -T */
+static const char * const transaction_attrs[] = {
+ "task-clock",
+ "{"
+ "instructions,"
+ "cycles,"
+ "cpu/cycles-t/,"
+ "cpu/tx-start/,"
+ "cpu/el-start/,"
+ "cpu/cycles-ct/"
+ "}"
+};
- { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
- { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
- { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
- { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
+/* More limited version when the CPU does not have all events. */
+static const char * const transaction_limited_attrs[] = {
+ "task-clock",
+ "{"
+ "instructions,"
+ "cycles,"
+ "cpu/cycles-t/,"
+ "cpu/tx-start/"
+ "}"
+};
- { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
- { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
- { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
- { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
- { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES },
- { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES },
+/* must match transaction_attrs and the beginning limited_attrs */
+enum {
+ T_TASK_CLOCK,
+ T_INSTRUCTIONS,
+ T_CYCLES,
+ T_CYCLES_IN_TX,
+ T_TRANSACTION_START,
+ T_ELISION_START,
+ T_CYCLES_IN_TX_CP,
+};
+
+static struct perf_evlist *evsel_list;
+static struct target target = {
+ .uid = UINT_MAX,
};
-static bool system_wide = false;
-static int nr_cpus = 0;
-static int run_idx = 0;
+enum aggr_mode {
+ AGGR_NONE,
+ AGGR_GLOBAL,
+ AGGR_SOCKET,
+ AGGR_CORE,
+};
static int run_count = 1;
static bool no_inherit = false;
static bool scale = true;
-static pid_t target_pid = -1;
-static pid_t target_tid = -1;
-static pid_t *all_tids = NULL;
-static int thread_num = 0;
-static pid_t child_pid = -1;
+static enum aggr_mode aggr_mode = AGGR_GLOBAL;
+static volatile pid_t child_pid = -1;
static bool null_run = false;
-static bool big_num = false;
-static const char *cpu_list;
+static int detailed_run = 0;
+static bool transaction_run;
+static bool big_num = true;
+static int big_num_opt = -1;
+static const char *csv_sep = NULL;
+static bool csv_output = false;
+static bool group = false;
+static FILE *output = NULL;
+static const char *pre_cmd = NULL;
+static const char *post_cmd = NULL;
+static bool sync_run = false;
+static unsigned int interval = 0;
+static unsigned int initial_delay = 0;
+static unsigned int unit_width = 4; /* strlen("unit") */
+static bool forever = false;
+static struct timespec ref_time;
+static struct cpu_map *aggr_map;
+static int (*aggr_get_id)(struct cpu_map *m, int cpu);
+static volatile int done = 0;
-static int *fd[MAX_NR_CPUS][MAX_COUNTERS];
+struct perf_stat {
+ struct stats res_stats[3];
+};
-static int event_scaled[MAX_COUNTERS];
+static inline void diff_timespec(struct timespec *r, struct timespec *a,
+ struct timespec *b)
+{
+ r->tv_sec = a->tv_sec - b->tv_sec;
+ if (a->tv_nsec < b->tv_nsec) {
+ r->tv_nsec = a->tv_nsec + 1000000000L - b->tv_nsec;
+ r->tv_sec--;
+ } else {
+ r->tv_nsec = a->tv_nsec - b->tv_nsec ;
+ }
+}
-static volatile int done = 0;
+static inline struct cpu_map *perf_evsel__cpus(struct perf_evsel *evsel)
+{
+ return (evsel->cpus && !target.cpu_list) ? evsel->cpus : evsel_list->cpus;
+}
-struct stats
+static inline int perf_evsel__nr_cpus(struct perf_evsel *evsel)
{
- double n, mean, M2;
-};
+ return perf_evsel__cpus(evsel)->nr;
+}
+
+static void perf_evsel__reset_stat_priv(struct perf_evsel *evsel)
+{
+ int i;
+ struct perf_stat *ps = evsel->priv;
+
+ for (i = 0; i < 3; i++)
+ init_stats(&ps->res_stats[i]);
+}
-static void update_stats(struct stats *stats, u64 val)
+static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
{
- double delta;
+ evsel->priv = zalloc(sizeof(struct perf_stat));
+ if (evsel == NULL)
+ return -ENOMEM;
+ perf_evsel__reset_stat_priv(evsel);
+ return 0;
+}
- stats->n++;
- delta = val - stats->mean;
- stats->mean += delta / stats->n;
- stats->M2 += delta*(val - stats->mean);
+static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
+{
+ zfree(&evsel->priv);
}
-static double avg_stats(struct stats *stats)
+static int perf_evsel__alloc_prev_raw_counts(struct perf_evsel *evsel)
{
- return stats->mean;
+ void *addr;
+ size_t sz;
+
+ sz = sizeof(*evsel->counts) +
+ (perf_evsel__nr_cpus(evsel) * sizeof(struct perf_counts_values));
+
+ addr = zalloc(sz);
+ if (!addr)
+ return -ENOMEM;
+
+ evsel->prev_raw_counts = addr;
+
+ return 0;
}
-/*
- * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
- *
- * (\Sum n_i^2) - ((\Sum n_i)^2)/n
- * s^2 = -------------------------------
- * n - 1
- *
- * http://en.wikipedia.org/wiki/Stddev
- *
- * The std dev of the mean is related to the std dev by:
- *
- * s
- * s_mean = -------
- * sqrt(n)
- *
- */
-static double stddev_stats(struct stats *stats)
+static void perf_evsel__free_prev_raw_counts(struct perf_evsel *evsel)
+{
+ zfree(&evsel->prev_raw_counts);
+}
+
+static void perf_evlist__free_stats(struct perf_evlist *evlist)
+{
+ struct perf_evsel *evsel;
+
+ evlist__for_each(evlist, evsel) {
+ perf_evsel__free_stat_priv(evsel);
+ perf_evsel__free_counts(evsel);
+ perf_evsel__free_prev_raw_counts(evsel);
+ }
+}
+
+static int perf_evlist__alloc_stats(struct perf_evlist *evlist, bool alloc_raw)
{
- double variance = stats->M2 / (stats->n - 1);
- double variance_mean = variance / stats->n;
+ struct perf_evsel *evsel;
+
+ evlist__for_each(evlist, evsel) {
+ if (perf_evsel__alloc_stat_priv(evsel) < 0 ||
+ perf_evsel__alloc_counts(evsel, perf_evsel__nr_cpus(evsel)) < 0 ||
+ (alloc_raw && perf_evsel__alloc_prev_raw_counts(evsel) < 0))
+ goto out_free;
+ }
- return sqrt(variance_mean);
+ return 0;
+
+out_free:
+ perf_evlist__free_stats(evlist);
+ return -1;
}
-struct stats event_res_stats[MAX_COUNTERS][3];
-struct stats runtime_nsecs_stats;
-struct stats walltime_nsecs_stats;
-struct stats runtime_cycles_stats;
-struct stats runtime_branches_stats;
+static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
+static struct stats runtime_cycles_stats[MAX_NR_CPUS];
+static struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
+static struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
+static struct stats runtime_branches_stats[MAX_NR_CPUS];
+static struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
+static struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
+static struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
+static struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
+static struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
+static struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
+static struct stats runtime_cycles_in_tx_stats[MAX_NR_CPUS];
+static struct stats walltime_nsecs_stats;
+static struct stats runtime_transaction_stats[MAX_NR_CPUS];
+static struct stats runtime_elision_stats[MAX_NR_CPUS];
+
+static void perf_stat__reset_stats(struct perf_evlist *evlist)
+{
+ struct perf_evsel *evsel;
-#define MATCH_EVENT(t, c, counter) \
- (attrs[counter].type == PERF_TYPE_##t && \
- attrs[counter].config == PERF_COUNT_##c)
+ evlist__for_each(evlist, evsel) {
+ perf_evsel__reset_stat_priv(evsel);
+ perf_evsel__reset_counts(evsel, perf_evsel__nr_cpus(evsel));
+ }
-#define ERR_PERF_OPEN \
-"Error: counter %d, sys_perf_event_open() syscall returned with %d (%s)\n"
+ memset(runtime_nsecs_stats, 0, sizeof(runtime_nsecs_stats));
+ memset(runtime_cycles_stats, 0, sizeof(runtime_cycles_stats));
+ memset(runtime_stalled_cycles_front_stats, 0, sizeof(runtime_stalled_cycles_front_stats));
+ memset(runtime_stalled_cycles_back_stats, 0, sizeof(runtime_stalled_cycles_back_stats));
+ memset(runtime_branches_stats, 0, sizeof(runtime_branches_stats));
+ memset(runtime_cacherefs_stats, 0, sizeof(runtime_cacherefs_stats));
+ memset(runtime_l1_dcache_stats, 0, sizeof(runtime_l1_dcache_stats));
+ memset(runtime_l1_icache_stats, 0, sizeof(runtime_l1_icache_stats));
+ memset(runtime_ll_cache_stats, 0, sizeof(runtime_ll_cache_stats));
+ memset(runtime_itlb_cache_stats, 0, sizeof(runtime_itlb_cache_stats));
+ memset(runtime_dtlb_cache_stats, 0, sizeof(runtime_dtlb_cache_stats));
+ memset(runtime_cycles_in_tx_stats, 0,
+ sizeof(runtime_cycles_in_tx_stats));
+ memset(runtime_transaction_stats, 0,
+ sizeof(runtime_transaction_stats));
+ memset(runtime_elision_stats, 0, sizeof(runtime_elision_stats));
+ memset(&walltime_nsecs_stats, 0, sizeof(walltime_nsecs_stats));
+}
-static int create_perf_stat_counter(int counter)
+static int create_perf_stat_counter(struct perf_evsel *evsel)
{
- struct perf_event_attr *attr = attrs + counter;
- int thread;
- int ncreated = 0;
+ struct perf_event_attr *attr = &evsel->attr;
if (scale)
attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
PERF_FORMAT_TOTAL_TIME_RUNNING;
- if (system_wide) {
- int cpu;
+ attr->inherit = !no_inherit;
- for (cpu = 0; cpu < nr_cpus; cpu++) {
- fd[cpu][counter][0] = sys_perf_event_open(attr,
- -1, cpumap[cpu], -1, 0);
- if (fd[cpu][counter][0] < 0)
- pr_debug(ERR_PERF_OPEN, counter,
- fd[cpu][counter][0], strerror(errno));
- else
- ++ncreated;
- }
- } else {
- attr->inherit = !no_inherit;
- if (target_pid == -1 && target_tid == -1) {
- attr->disabled = 1;
+ if (target__has_cpu(&target))
+ return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
+
+ if (!target__has_task(&target) && perf_evsel__is_group_leader(evsel)) {
+ attr->disabled = 1;
+ if (!initial_delay)
attr->enable_on_exec = 1;
- }
- for (thread = 0; thread < thread_num; thread++) {
- fd[0][counter][thread] = sys_perf_event_open(attr,
- all_tids[thread], -1, -1, 0);
- if (fd[0][counter][thread] < 0)
- pr_debug(ERR_PERF_OPEN, counter,
- fd[0][counter][thread],
- strerror(errno));
- else
- ++ncreated;
- }
}
- return ncreated;
+ return perf_evsel__open_per_thread(evsel, evsel_list->threads);
}
/*
* Does the counter have nsecs as a unit?
*/
-static inline int nsec_counter(int counter)
+static inline int nsec_counter(struct perf_evsel *evsel)
{
- if (MATCH_EVENT(SOFTWARE, SW_CPU_CLOCK, counter) ||
- MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter))
+ if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
+ perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
return 1;
return 0;
}
+static struct perf_evsel *nth_evsel(int n)
+{
+ static struct perf_evsel **array;
+ static int array_len;
+ struct perf_evsel *ev;
+ int j;
+
+ /* Assumes this only called when evsel_list does not change anymore. */
+ if (!array) {
+ evlist__for_each(evsel_list, ev)
+ array_len++;
+ array = malloc(array_len * sizeof(void *));
+ if (!array)
+ exit(ENOMEM);
+ j = 0;
+ evlist__for_each(evsel_list, ev)
+ array[j++] = ev;
+ }
+ if (n < array_len)
+ return array[n];
+ return NULL;
+}
+
+/*
+ * Update various tracking values we maintain to print
+ * more semantic information such as miss/hit ratios,
+ * instruction rates, etc:
+ */
+static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
+{
+ if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
+ update_stats(&runtime_nsecs_stats[0], count[0]);
+ else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
+ update_stats(&runtime_cycles_stats[0], count[0]);
+ else if (transaction_run &&
+ perf_evsel__cmp(counter, nth_evsel(T_CYCLES_IN_TX)))
+ update_stats(&runtime_cycles_in_tx_stats[0], count[0]);
+ else if (transaction_run &&
+ perf_evsel__cmp(counter, nth_evsel(T_TRANSACTION_START)))
+ update_stats(&runtime_transaction_stats[0], count[0]);
+ else if (transaction_run &&
+ perf_evsel__cmp(counter, nth_evsel(T_ELISION_START)))
+ update_stats(&runtime_elision_stats[0], count[0]);
+ else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
+ update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
+ else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
+ update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
+ else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
+ update_stats(&runtime_branches_stats[0], count[0]);
+ else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
+ update_stats(&runtime_cacherefs_stats[0], count[0]);
+ else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
+ update_stats(&runtime_l1_dcache_stats[0], count[0]);
+ else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
+ update_stats(&runtime_l1_icache_stats[0], count[0]);
+ else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
+ update_stats(&runtime_ll_cache_stats[0], count[0]);
+ else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
+ update_stats(&runtime_dtlb_cache_stats[0], count[0]);
+ else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
+ update_stats(&runtime_itlb_cache_stats[0], count[0]);
+}
+
+/*
+ * Read out the results of a single counter:
+ * aggregate counts across CPUs in system-wide mode
+ */
+static int read_counter_aggr(struct perf_evsel *counter)
+{
+ struct perf_stat *ps = counter->priv;
+ u64 *count = counter->counts->aggr.values;
+ int i;
+
+ if (__perf_evsel__read(counter, perf_evsel__nr_cpus(counter),
+ thread_map__nr(evsel_list->threads), scale) < 0)
+ return -1;
+
+ for (i = 0; i < 3; i++)
+ update_stats(&ps->res_stats[i], count[i]);
+
+ if (verbose) {
+ fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
+ perf_evsel__name(counter), count[0], count[1], count[2]);
+ }
+
+ /*
+ * Save the full runtime - to allow normalization during printout:
+ */
+ update_shadow_stats(counter, count);
+
+ return 0;
+}
+
/*
* Read out the results of a single counter:
+ * do not aggregate counts across CPUs in system-wide mode
*/
-static void read_counter(int counter)
+static int read_counter(struct perf_evsel *counter)
{
- u64 count[3], single_count[3];
+ u64 *count;
int cpu;
- size_t res, nv;
- int scaled;
- int i, thread;
- count[0] = count[1] = count[2] = 0;
+ for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
+ if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
+ return -1;
- nv = scale ? 3 : 1;
- for (cpu = 0; cpu < nr_cpus; cpu++) {
- for (thread = 0; thread < thread_num; thread++) {
- if (fd[cpu][counter][thread] < 0)
- continue;
+ count = counter->counts->cpu[cpu].values;
- res = read(fd[cpu][counter][thread],
- single_count, nv * sizeof(u64));
- assert(res == nv * sizeof(u64));
+ update_shadow_stats(counter, count);
+ }
- close(fd[cpu][counter][thread]);
- fd[cpu][counter][thread] = -1;
+ return 0;
+}
- count[0] += single_count[0];
- if (scale) {
- count[1] += single_count[1];
- count[2] += single_count[2];
- }
+static void print_interval(void)
+{
+ static int num_print_interval;
+ struct perf_evsel *counter;
+ struct perf_stat *ps;
+ struct timespec ts, rs;
+ char prefix[64];
+
+ if (aggr_mode == AGGR_GLOBAL) {
+ evlist__for_each(evsel_list, counter) {
+ ps = counter->priv;
+ memset(ps->res_stats, 0, sizeof(ps->res_stats));
+ read_counter_aggr(counter);
+ }
+ } else {
+ evlist__for_each(evsel_list, counter) {
+ ps = counter->priv;
+ memset(ps->res_stats, 0, sizeof(ps->res_stats));
+ read_counter(counter);
}
}
- scaled = 0;
- if (scale) {
- if (count[2] == 0) {
- event_scaled[counter] = -1;
- count[0] = 0;
- return;
+ clock_gettime(CLOCK_MONOTONIC, &ts);
+ diff_timespec(&rs, &ts, &ref_time);
+ sprintf(prefix, "%6lu.%09lu%s", rs.tv_sec, rs.tv_nsec, csv_sep);
+
+ if (num_print_interval == 0 && !csv_output) {
+ switch (aggr_mode) {
+ case AGGR_SOCKET:
+ fprintf(output, "# time socket cpus counts %*s events\n", unit_width, "unit");
+ break;
+ case AGGR_CORE:
+ fprintf(output, "# time core cpus counts %*s events\n", unit_width, "unit");
+ break;
+ case AGGR_NONE:
+ fprintf(output, "# time CPU counts %*s events\n", unit_width, "unit");
+ break;
+ case AGGR_GLOBAL:
+ default:
+ fprintf(output, "# time counts %*s events\n", unit_width, "unit");
}
+ }
- if (count[2] < count[1]) {
- event_scaled[counter] = 1;
- count[0] = (unsigned long long)
- ((double)count[0] * count[1] / count[2] + 0.5);
- }
+ if (++num_print_interval == 25)
+ num_print_interval = 0;
+
+ switch (aggr_mode) {
+ case AGGR_CORE:
+ case AGGR_SOCKET:
+ print_aggr(prefix);
+ break;
+ case AGGR_NONE:
+ evlist__for_each(evsel_list, counter)
+ print_counter(counter, prefix);
+ break;
+ case AGGR_GLOBAL:
+ default:
+ evlist__for_each(evsel_list, counter)
+ print_counter_aggr(counter, prefix);
}
- for (i = 0; i < 3; i++)
- update_stats(&event_res_stats[counter][i], count[i]);
+ fflush(output);
+}
- if (verbose) {
- fprintf(stderr, "%s: %Ld %Ld %Ld\n", event_name(counter),
- count[0], count[1], count[2]);
+static void handle_initial_delay(void)
+{
+ struct perf_evsel *counter;
+
+ if (initial_delay) {
+ const int ncpus = cpu_map__nr(evsel_list->cpus),
+ nthreads = thread_map__nr(evsel_list->threads);
+
+ usleep(initial_delay * 1000);
+ evlist__for_each(evsel_list, counter)
+ perf_evsel__enable(counter, ncpus, nthreads);
}
+}
- /*
- * Save the full runtime - to allow normalization during printout:
- */
- if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter))
- update_stats(&runtime_nsecs_stats, count[0]);
- if (MATCH_EVENT(HARDWARE, HW_CPU_CYCLES, counter))
- update_stats(&runtime_cycles_stats, count[0]);
- if (MATCH_EVENT(HARDWARE, HW_BRANCH_INSTRUCTIONS, counter))
- update_stats(&runtime_branches_stats, count[0]);
+static volatile int workload_exec_errno;
+
+/*
+ * perf_evlist__prepare_workload will send a SIGUSR1
+ * if the fork fails, since we asked by setting its
+ * want_signal to true.
+ */
+static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
+ void *ucontext __maybe_unused)
+{
+ workload_exec_errno = info->si_value.sival_int;
}
-static int run_perf_stat(int argc __used, const char **argv)
+static int __run_perf_stat(int argc, const char **argv)
{
+ char msg[512];
unsigned long long t0, t1;
+ struct perf_evsel *counter;
+ struct timespec ts;
+ size_t l;
int status = 0;
- int counter, ncreated = 0;
- int child_ready_pipe[2], go_pipe[2];
const bool forks = (argc > 0);
- char buf;
-
- if (!system_wide)
- nr_cpus = 1;
- if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
- perror("failed to create pipes");
- exit(1);
+ if (interval) {
+ ts.tv_sec = interval / 1000;
+ ts.tv_nsec = (interval % 1000) * 1000000;
+ } else {
+ ts.tv_sec = 1;
+ ts.tv_nsec = 0;
}
if (forks) {
- if ((child_pid = fork()) < 0)
- perror("failed to fork");
+ if (perf_evlist__prepare_workload(evsel_list, &target, argv, false,
+ workload_exec_failed_signal) < 0) {
+ perror("failed to prepare workload");
+ return -1;
+ }
+ child_pid = evsel_list->workload.pid;
+ }
- if (!child_pid) {
- close(child_ready_pipe[0]);
- close(go_pipe[1]);
- fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
+ if (group)
+ perf_evlist__set_leader(evsel_list);
+ evlist__for_each(evsel_list, counter) {
+ if (create_perf_stat_counter(counter) < 0) {
/*
- * Do a dummy execvp to get the PLT entry resolved,
- * so we avoid the resolver overhead on the real
- * execvp call.
+ * PPC returns ENXIO for HW counters until 2.6.37
+ * (behavior changed with commit b0a873e).
*/
- execvp("", (char **)argv);
-
- /*
- * Tell the parent we're ready to go
- */
- close(child_ready_pipe[1]);
+ if (errno == EINVAL || errno == ENOSYS ||
+ errno == ENOENT || errno == EOPNOTSUPP ||
+ errno == ENXIO) {
+ if (verbose)
+ ui__warning("%s event is not supported by the kernel.\n",
+ perf_evsel__name(counter));
+ counter->supported = false;
+ continue;
+ }
- /*
- * Wait until the parent tells us to go.
- */
- if (read(go_pipe[0], &buf, 1) == -1)
- perror("unable to read pipe");
+ perf_evsel__open_strerror(counter, &target,
+ errno, msg, sizeof(msg));
+ ui__error("%s\n", msg);
- execvp(argv[0], (char **)argv);
+ if (child_pid != -1)
+ kill(child_pid, SIGTERM);
- perror(argv[0]);
- exit(-1);
+ return -1;
}
+ counter->supported = true;
- if (target_tid == -1 && target_pid == -1 && !system_wide)
- all_tids[0] = child_pid;
-
- /*
- * Wait for the child to be ready to exec.
- */
- close(child_ready_pipe[1]);
- close(go_pipe[0]);
- if (read(child_ready_pipe[0], &buf, 1) == -1)
- perror("unable to read pipe");
- close(child_ready_pipe[0]);
+ l = strlen(counter->unit);
+ if (l > unit_width)
+ unit_width = l;
}
- for (counter = 0; counter < nr_counters; counter++)
- ncreated += create_perf_stat_counter(counter);
-
- if (ncreated == 0) {
- pr_err("No permission to collect %sstats.\n"
- "Consider tweaking /proc/sys/kernel/perf_event_paranoid.\n",
- system_wide ? "system-wide " : "");
- if (child_pid != -1)
- kill(child_pid, SIGTERM);
+ if (perf_evlist__apply_filters(evsel_list)) {
+ error("failed to set filter with %d (%s)\n", errno,
+ strerror(errno));
return -1;
}
@@ -350,165 +601,801 @@ static int run_perf_stat(int argc __used, const char **argv)
* Enable counters and exec the command:
*/
t0 = rdclock();
+ clock_gettime(CLOCK_MONOTONIC, &ref_time);
if (forks) {
- close(go_pipe[1]);
+ perf_evlist__start_workload(evsel_list);
+ handle_initial_delay();
+
+ if (interval) {
+ while (!waitpid(child_pid, &status, WNOHANG)) {
+ nanosleep(&ts, NULL);
+ print_interval();
+ }
+ }
wait(&status);
+
+ if (workload_exec_errno) {
+ const char *emsg = strerror_r(workload_exec_errno, msg, sizeof(msg));
+ pr_err("Workload failed: %s\n", emsg);
+ return -1;
+ }
+
+ if (WIFSIGNALED(status))
+ psignal(WTERMSIG(status), argv[0]);
} else {
- while(!done) sleep(1);
+ handle_initial_delay();
+ while (!done) {
+ nanosleep(&ts, NULL);
+ if (interval)
+ print_interval();
+ }
}
t1 = rdclock();
update_stats(&walltime_nsecs_stats, t1 - t0);
- for (counter = 0; counter < nr_counters; counter++)
- read_counter(counter);
+ if (aggr_mode == AGGR_GLOBAL) {
+ evlist__for_each(evsel_list, counter) {
+ read_counter_aggr(counter);
+ perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
+ thread_map__nr(evsel_list->threads));
+ }
+ } else {
+ evlist__for_each(evsel_list, counter) {
+ read_counter(counter);
+ perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
+ }
+ }
return WEXITSTATUS(status);
}
-static void print_noise(int counter, double avg)
+static int run_perf_stat(int argc, const char **argv)
+{
+ int ret;
+
+ if (pre_cmd) {
+ ret = system(pre_cmd);
+ if (ret)
+ return ret;
+ }
+
+ if (sync_run)
+ sync();
+
+ ret = __run_perf_stat(argc, argv);
+ if (ret)
+ return ret;
+
+ if (post_cmd) {
+ ret = system(post_cmd);
+ if (ret)
+ return ret;
+ }
+
+ return ret;
+}
+
+static void print_noise_pct(double total, double avg)
+{
+ double pct = rel_stddev_stats(total, avg);
+
+ if (csv_output)
+ fprintf(output, "%s%.2f%%", csv_sep, pct);
+ else if (pct)
+ fprintf(output, " ( +-%6.2f%% )", pct);
+}
+
+static void print_noise(struct perf_evsel *evsel, double avg)
{
+ struct perf_stat *ps;
+
if (run_count == 1)
return;
- fprintf(stderr, " ( +- %7.3f%% )",
- 100 * stddev_stats(&event_res_stats[counter][0]) / avg);
+ ps = evsel->priv;
+ print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
}
-static void nsec_printout(int counter, double avg)
+static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
+{
+ switch (aggr_mode) {
+ case AGGR_CORE:
+ fprintf(output, "S%d-C%*d%s%*d%s",
+ cpu_map__id_to_socket(id),
+ csv_output ? 0 : -8,
+ cpu_map__id_to_cpu(id),
+ csv_sep,
+ csv_output ? 0 : 4,
+ nr,
+ csv_sep);
+ break;
+ case AGGR_SOCKET:
+ fprintf(output, "S%*d%s%*d%s",
+ csv_output ? 0 : -5,
+ id,
+ csv_sep,
+ csv_output ? 0 : 4,
+ nr,
+ csv_sep);
+ break;
+ case AGGR_NONE:
+ fprintf(output, "CPU%*d%s",
+ csv_output ? 0 : -4,
+ perf_evsel__cpus(evsel)->map[id], csv_sep);
+ break;
+ case AGGR_GLOBAL:
+ default:
+ break;
+ }
+}
+
+static void nsec_printout(int cpu, int nr, struct perf_evsel *evsel, double avg)
{
double msecs = avg / 1e6;
+ const char *fmt_v, *fmt_n;
+ char name[25];
- fprintf(stderr, " %18.6f %-24s", msecs, event_name(counter));
+ fmt_v = csv_output ? "%.6f%s" : "%18.6f%s";
+ fmt_n = csv_output ? "%s" : "%-25s";
- if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) {
- fprintf(stderr, " # %10.3f CPUs ",
- avg / avg_stats(&walltime_nsecs_stats));
- }
+ aggr_printout(evsel, cpu, nr);
+
+ scnprintf(name, sizeof(name), "%s%s",
+ perf_evsel__name(evsel), csv_output ? "" : " (msec)");
+
+ fprintf(output, fmt_v, msecs, csv_sep);
+
+ if (csv_output)
+ fprintf(output, "%s%s", evsel->unit, csv_sep);
+ else
+ fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep);
+
+ fprintf(output, fmt_n, name);
+
+ if (evsel->cgrp)
+ fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
+
+ if (csv_output || interval)
+ return;
+
+ if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
+ fprintf(output, " # %8.3f CPUs utilized ",
+ avg / avg_stats(&walltime_nsecs_stats));
+ else
+ fprintf(output, " ");
}
-static void abs_printout(int counter, double avg)
+/* used for get_ratio_color() */
+enum grc_type {
+ GRC_STALLED_CYCLES_FE,
+ GRC_STALLED_CYCLES_BE,
+ GRC_CACHE_MISSES,
+ GRC_MAX_NR
+};
+
+static const char *get_ratio_color(enum grc_type type, double ratio)
+{
+ static const double grc_table[GRC_MAX_NR][3] = {
+ [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
+ [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
+ [GRC_CACHE_MISSES] = { 20.0, 10.0, 5.0 },
+ };
+ const char *color = PERF_COLOR_NORMAL;
+
+ if (ratio > grc_table[type][0])
+ color = PERF_COLOR_RED;
+ else if (ratio > grc_table[type][1])
+ color = PERF_COLOR_MAGENTA;
+ else if (ratio > grc_table[type][2])
+ color = PERF_COLOR_YELLOW;
+
+ return color;
+}
+
+static void print_stalled_cycles_frontend(int cpu,
+ struct perf_evsel *evsel
+ __maybe_unused, double avg)
{
double total, ratio = 0.0;
+ const char *color;
- if (big_num)
- fprintf(stderr, " %'18.0f %-24s", avg, event_name(counter));
- else
- fprintf(stderr, " %18.0f %-24s", avg, event_name(counter));
+ total = avg_stats(&runtime_cycles_stats[cpu]);
- if (MATCH_EVENT(HARDWARE, HW_INSTRUCTIONS, counter)) {
- total = avg_stats(&runtime_cycles_stats);
+ if (total)
+ ratio = avg / total * 100.0;
- if (total)
+ color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
+
+ fprintf(output, " # ");
+ color_fprintf(output, color, "%6.2f%%", ratio);
+ fprintf(output, " frontend cycles idle ");
+}
+
+static void print_stalled_cycles_backend(int cpu,
+ struct perf_evsel *evsel
+ __maybe_unused, double avg)
+{
+ double total, ratio = 0.0;
+ const char *color;
+
+ total = avg_stats(&runtime_cycles_stats[cpu]);
+
+ if (total)
+ ratio = avg / total * 100.0;
+
+ color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
+
+ fprintf(output, " # ");
+ color_fprintf(output, color, "%6.2f%%", ratio);
+ fprintf(output, " backend cycles idle ");
+}
+
+static void print_branch_misses(int cpu,
+ struct perf_evsel *evsel __maybe_unused,
+ double avg)
+{
+ double total, ratio = 0.0;
+ const char *color;
+
+ total = avg_stats(&runtime_branches_stats[cpu]);
+
+ if (total)
+ ratio = avg / total * 100.0;
+
+ color = get_ratio_color(GRC_CACHE_MISSES, ratio);
+
+ fprintf(output, " # ");
+ color_fprintf(output, color, "%6.2f%%", ratio);
+ fprintf(output, " of all branches ");
+}
+
+static void print_l1_dcache_misses(int cpu,
+ struct perf_evsel *evsel __maybe_unused,
+ double avg)
+{
+ double total, ratio = 0.0;
+ const char *color;
+
+ total = avg_stats(&runtime_l1_dcache_stats[cpu]);
+
+ if (total)
+ ratio = avg / total * 100.0;
+
+ color = get_ratio_color(GRC_CACHE_MISSES, ratio);
+
+ fprintf(output, " # ");
+ color_fprintf(output, color, "%6.2f%%", ratio);
+ fprintf(output, " of all L1-dcache hits ");
+}
+
+static void print_l1_icache_misses(int cpu,
+ struct perf_evsel *evsel __maybe_unused,
+ double avg)
+{
+ double total, ratio = 0.0;
+ const char *color;
+
+ total = avg_stats(&runtime_l1_icache_stats[cpu]);
+
+ if (total)
+ ratio = avg / total * 100.0;
+
+ color = get_ratio_color(GRC_CACHE_MISSES, ratio);
+
+ fprintf(output, " # ");
+ color_fprintf(output, color, "%6.2f%%", ratio);
+ fprintf(output, " of all L1-icache hits ");
+}
+
+static void print_dtlb_cache_misses(int cpu,
+ struct perf_evsel *evsel __maybe_unused,
+ double avg)
+{
+ double total, ratio = 0.0;
+ const char *color;
+
+ total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
+
+ if (total)
+ ratio = avg / total * 100.0;
+
+ color = get_ratio_color(GRC_CACHE_MISSES, ratio);
+
+ fprintf(output, " # ");
+ color_fprintf(output, color, "%6.2f%%", ratio);
+ fprintf(output, " of all dTLB cache hits ");
+}
+
+static void print_itlb_cache_misses(int cpu,
+ struct perf_evsel *evsel __maybe_unused,
+ double avg)
+{
+ double total, ratio = 0.0;
+ const char *color;
+
+ total = avg_stats(&runtime_itlb_cache_stats[cpu]);
+
+ if (total)
+ ratio = avg / total * 100.0;
+
+ color = get_ratio_color(GRC_CACHE_MISSES, ratio);
+
+ fprintf(output, " # ");
+ color_fprintf(output, color, "%6.2f%%", ratio);
+ fprintf(output, " of all iTLB cache hits ");
+}
+
+static void print_ll_cache_misses(int cpu,
+ struct perf_evsel *evsel __maybe_unused,
+ double avg)
+{
+ double total, ratio = 0.0;
+ const char *color;
+
+ total = avg_stats(&runtime_ll_cache_stats[cpu]);
+
+ if (total)
+ ratio = avg / total * 100.0;
+
+ color = get_ratio_color(GRC_CACHE_MISSES, ratio);
+
+ fprintf(output, " # ");
+ color_fprintf(output, color, "%6.2f%%", ratio);
+ fprintf(output, " of all LL-cache hits ");
+}
+
+static void abs_printout(int cpu, int nr, struct perf_evsel *evsel, double avg)
+{
+ double total, ratio = 0.0, total2;
+ double sc = evsel->scale;
+ const char *fmt;
+
+ if (csv_output) {
+ fmt = sc != 1.0 ? "%.2f%s" : "%.0f%s";
+ } else {
+ if (big_num)
+ fmt = sc != 1.0 ? "%'18.2f%s" : "%'18.0f%s";
+ else
+ fmt = sc != 1.0 ? "%18.2f%s" : "%18.0f%s";
+ }
+
+ aggr_printout(evsel, cpu, nr);
+
+ if (aggr_mode == AGGR_GLOBAL)
+ cpu = 0;
+
+ fprintf(output, fmt, avg, csv_sep);
+
+ if (evsel->unit)
+ fprintf(output, "%-*s%s",
+ csv_output ? 0 : unit_width,
+ evsel->unit, csv_sep);
+
+ fprintf(output, "%-*s", csv_output ? 0 : 25, perf_evsel__name(evsel));
+
+ if (evsel->cgrp)
+ fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
+
+ if (csv_output || interval)
+ return;
+
+ if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
+ total = avg_stats(&runtime_cycles_stats[cpu]);
+ if (total) {
ratio = avg / total;
+ fprintf(output, " # %5.2f insns per cycle ", ratio);
+ }
+ total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
+ total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
+
+ if (total && avg) {
+ ratio = total / avg;
+ fprintf(output, "\n");
+ if (aggr_mode == AGGR_NONE)
+ fprintf(output, " ");
+ fprintf(output, " # %5.2f stalled cycles per insn", ratio);
+ }
- fprintf(stderr, " # %10.3f IPC ", ratio);
- } else if (MATCH_EVENT(HARDWARE, HW_BRANCH_MISSES, counter) &&
- runtime_branches_stats.n != 0) {
- total = avg_stats(&runtime_branches_stats);
+ } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
+ runtime_branches_stats[cpu].n != 0) {
+ print_branch_misses(cpu, evsel, avg);
+ } else if (
+ evsel->attr.type == PERF_TYPE_HW_CACHE &&
+ evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1D |
+ ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
+ ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
+ runtime_l1_dcache_stats[cpu].n != 0) {
+ print_l1_dcache_misses(cpu, evsel, avg);
+ } else if (
+ evsel->attr.type == PERF_TYPE_HW_CACHE &&
+ evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1I |
+ ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
+ ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
+ runtime_l1_icache_stats[cpu].n != 0) {
+ print_l1_icache_misses(cpu, evsel, avg);
+ } else if (
+ evsel->attr.type == PERF_TYPE_HW_CACHE &&
+ evsel->attr.config == ( PERF_COUNT_HW_CACHE_DTLB |
+ ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
+ ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
+ runtime_dtlb_cache_stats[cpu].n != 0) {
+ print_dtlb_cache_misses(cpu, evsel, avg);
+ } else if (
+ evsel->attr.type == PERF_TYPE_HW_CACHE &&
+ evsel->attr.config == ( PERF_COUNT_HW_CACHE_ITLB |
+ ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
+ ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
+ runtime_itlb_cache_stats[cpu].n != 0) {
+ print_itlb_cache_misses(cpu, evsel, avg);
+ } else if (
+ evsel->attr.type == PERF_TYPE_HW_CACHE &&
+ evsel->attr.config == ( PERF_COUNT_HW_CACHE_LL |
+ ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
+ ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
+ runtime_ll_cache_stats[cpu].n != 0) {
+ print_ll_cache_misses(cpu, evsel, avg);
+ } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
+ runtime_cacherefs_stats[cpu].n != 0) {
+ total = avg_stats(&runtime_cacherefs_stats[cpu]);
if (total)
ratio = avg * 100 / total;
- fprintf(stderr, " # %10.3f %% ", ratio);
+ fprintf(output, " # %8.3f %% of all cache refs ", ratio);
+
+ } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
+ print_stalled_cycles_frontend(cpu, evsel, avg);
+ } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
+ print_stalled_cycles_backend(cpu, evsel, avg);
+ } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
+ total = avg_stats(&runtime_nsecs_stats[cpu]);
+
+ if (total) {
+ ratio = avg / total;
+ fprintf(output, " # %8.3f GHz ", ratio);
+ }
+ } else if (transaction_run &&
+ perf_evsel__cmp(evsel, nth_evsel(T_CYCLES_IN_TX))) {
+ total = avg_stats(&runtime_cycles_stats[cpu]);
+ if (total)
+ fprintf(output,
+ " # %5.2f%% transactional cycles ",
+ 100.0 * (avg / total));
+ } else if (transaction_run &&
+ perf_evsel__cmp(evsel, nth_evsel(T_CYCLES_IN_TX_CP))) {
+ total = avg_stats(&runtime_cycles_stats[cpu]);
+ total2 = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
+ if (total2 < avg)
+ total2 = avg;
+ if (total)
+ fprintf(output,
+ " # %5.2f%% aborted cycles ",
+ 100.0 * ((total2-avg) / total));
+ } else if (transaction_run &&
+ perf_evsel__cmp(evsel, nth_evsel(T_TRANSACTION_START)) &&
+ avg > 0 &&
+ runtime_cycles_in_tx_stats[cpu].n != 0) {
+ total = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
+
+ if (total)
+ ratio = total / avg;
- } else if (runtime_nsecs_stats.n != 0) {
- total = avg_stats(&runtime_nsecs_stats);
+ fprintf(output, " # %8.0f cycles / transaction ", ratio);
+ } else if (transaction_run &&
+ perf_evsel__cmp(evsel, nth_evsel(T_ELISION_START)) &&
+ avg > 0 &&
+ runtime_cycles_in_tx_stats[cpu].n != 0) {
+ total = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
+
+ if (total)
+ ratio = total / avg;
+
+ fprintf(output, " # %8.0f cycles / elision ", ratio);
+ } else if (runtime_nsecs_stats[cpu].n != 0) {
+ char unit = 'M';
+
+ total = avg_stats(&runtime_nsecs_stats[cpu]);
if (total)
ratio = 1000.0 * avg / total;
+ if (ratio < 0.001) {
+ ratio *= 1000;
+ unit = 'K';
+ }
+
+ fprintf(output, " # %8.3f %c/sec ", ratio, unit);
+ } else {
+ fprintf(output, " ");
+ }
+}
+
+static void print_aggr(char *prefix)
+{
+ struct perf_evsel *counter;
+ int cpu, cpu2, s, s2, id, nr;
+ double uval;
+ u64 ena, run, val;
+
+ if (!(aggr_map || aggr_get_id))
+ return;
+
+ for (s = 0; s < aggr_map->nr; s++) {
+ id = aggr_map->map[s];
+ evlist__for_each(evsel_list, counter) {
+ val = ena = run = 0;
+ nr = 0;
+ for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
+ cpu2 = perf_evsel__cpus(counter)->map[cpu];
+ s2 = aggr_get_id(evsel_list->cpus, cpu2);
+ if (s2 != id)
+ continue;
+ val += counter->counts->cpu[cpu].val;
+ ena += counter->counts->cpu[cpu].ena;
+ run += counter->counts->cpu[cpu].run;
+ nr++;
+ }
+ if (prefix)
+ fprintf(output, "%s", prefix);
+
+ if (run == 0 || ena == 0) {
+ aggr_printout(counter, id, nr);
+
+ fprintf(output, "%*s%s",
+ csv_output ? 0 : 18,
+ counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
+ csv_sep);
+
+ fprintf(output, "%-*s%s",
+ csv_output ? 0 : unit_width,
+ counter->unit, csv_sep);
+
+ fprintf(output, "%*s",
+ csv_output ? 0 : -25,
+ perf_evsel__name(counter));
+
+ if (counter->cgrp)
+ fprintf(output, "%s%s",
+ csv_sep, counter->cgrp->name);
+
+ fputc('\n', output);
+ continue;
+ }
+ uval = val * counter->scale;
+
+ if (nsec_counter(counter))
+ nsec_printout(id, nr, counter, uval);
+ else
+ abs_printout(id, nr, counter, uval);
+
+ if (!csv_output) {
+ print_noise(counter, 1.0);
- fprintf(stderr, " # %10.3f M/sec", ratio);
+ if (run != ena)
+ fprintf(output, " (%.2f%%)",
+ 100.0 * run / ena);
+ }
+ fputc('\n', output);
+ }
}
}
/*
* Print out the results of a single counter:
+ * aggregated counts in system-wide mode
*/
-static void print_counter(int counter)
+static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
{
- double avg = avg_stats(&event_res_stats[counter][0]);
- int scaled = event_scaled[counter];
+ struct perf_stat *ps = counter->priv;
+ double avg = avg_stats(&ps->res_stats[0]);
+ int scaled = counter->counts->scaled;
+ double uval;
+
+ if (prefix)
+ fprintf(output, "%s", prefix);
if (scaled == -1) {
- fprintf(stderr, " %18s %-24s\n",
- "<not counted>", event_name(counter));
+ fprintf(output, "%*s%s",
+ csv_output ? 0 : 18,
+ counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
+ csv_sep);
+ fprintf(output, "%-*s%s",
+ csv_output ? 0 : unit_width,
+ counter->unit, csv_sep);
+ fprintf(output, "%*s",
+ csv_output ? 0 : -25,
+ perf_evsel__name(counter));
+
+ if (counter->cgrp)
+ fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
+
+ fputc('\n', output);
return;
}
+ uval = avg * counter->scale;
+
if (nsec_counter(counter))
- nsec_printout(counter, avg);
+ nsec_printout(-1, 0, counter, uval);
else
- abs_printout(counter, avg);
+ abs_printout(-1, 0, counter, uval);
print_noise(counter, avg);
+ if (csv_output) {
+ fputc('\n', output);
+ return;
+ }
+
if (scaled) {
double avg_enabled, avg_running;
- avg_enabled = avg_stats(&event_res_stats[counter][1]);
- avg_running = avg_stats(&event_res_stats[counter][2]);
+ avg_enabled = avg_stats(&ps->res_stats[1]);
+ avg_running = avg_stats(&ps->res_stats[2]);
- fprintf(stderr, " (scaled from %.2f%%)",
- 100 * avg_running / avg_enabled);
+ fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
}
+ fprintf(output, "\n");
+}
+
+/*
+ * Print out the results of a single counter:
+ * does not use aggregated count in system-wide
+ */
+static void print_counter(struct perf_evsel *counter, char *prefix)
+{
+ u64 ena, run, val;
+ double uval;
+ int cpu;
+
+ for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
+ val = counter->counts->cpu[cpu].val;
+ ena = counter->counts->cpu[cpu].ena;
+ run = counter->counts->cpu[cpu].run;
+
+ if (prefix)
+ fprintf(output, "%s", prefix);
+
+ if (run == 0 || ena == 0) {
+ fprintf(output, "CPU%*d%s%*s%s",
+ csv_output ? 0 : -4,
+ perf_evsel__cpus(counter)->map[cpu], csv_sep,
+ csv_output ? 0 : 18,
+ counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
+ csv_sep);
+
+ fprintf(output, "%-*s%s",
+ csv_output ? 0 : unit_width,
+ counter->unit, csv_sep);
+
+ fprintf(output, "%*s",
+ csv_output ? 0 : -25,
+ perf_evsel__name(counter));
+
+ if (counter->cgrp)
+ fprintf(output, "%s%s",
+ csv_sep, counter->cgrp->name);
+
+ fputc('\n', output);
+ continue;
+ }
+
+ uval = val * counter->scale;
+
+ if (nsec_counter(counter))
+ nsec_printout(cpu, 0, counter, uval);
+ else
+ abs_printout(cpu, 0, counter, uval);
- fprintf(stderr, "\n");
+ if (!csv_output) {
+ print_noise(counter, 1.0);
+
+ if (run != ena)
+ fprintf(output, " (%.2f%%)",
+ 100.0 * run / ena);
+ }
+ fputc('\n', output);
+ }
}
static void print_stat(int argc, const char **argv)
{
- int i, counter;
+ struct perf_evsel *counter;
+ int i;
fflush(stdout);
- fprintf(stderr, "\n");
- fprintf(stderr, " Performance counter stats for ");
- if(target_pid == -1 && target_tid == -1) {
- fprintf(stderr, "\'%s", argv[0]);
- for (i = 1; i < argc; i++)
- fprintf(stderr, " %s", argv[i]);
- } else if (target_pid != -1)
- fprintf(stderr, "process id \'%d", target_pid);
- else
- fprintf(stderr, "thread id \'%d", target_tid);
-
- fprintf(stderr, "\'");
- if (run_count > 1)
- fprintf(stderr, " (%d runs)", run_count);
- fprintf(stderr, ":\n\n");
+ if (!csv_output) {
+ fprintf(output, "\n");
+ fprintf(output, " Performance counter stats for ");
+ if (target.system_wide)
+ fprintf(output, "\'system wide");
+ else if (target.cpu_list)
+ fprintf(output, "\'CPU(s) %s", target.cpu_list);
+ else if (!target__has_task(&target)) {
+ fprintf(output, "\'%s", argv[0]);
+ for (i = 1; i < argc; i++)
+ fprintf(output, " %s", argv[i]);
+ } else if (target.pid)
+ fprintf(output, "process id \'%s", target.pid);
+ else
+ fprintf(output, "thread id \'%s", target.tid);
+
+ fprintf(output, "\'");
+ if (run_count > 1)
+ fprintf(output, " (%d runs)", run_count);
+ fprintf(output, ":\n\n");
+ }
- for (counter = 0; counter < nr_counters; counter++)
- print_counter(counter);
+ switch (aggr_mode) {
+ case AGGR_CORE:
+ case AGGR_SOCKET:
+ print_aggr(NULL);
+ break;
+ case AGGR_GLOBAL:
+ evlist__for_each(evsel_list, counter)
+ print_counter_aggr(counter, NULL);
+ break;
+ case AGGR_NONE:
+ evlist__for_each(evsel_list, counter)
+ print_counter(counter, NULL);
+ break;
+ default:
+ break;
+ }
- fprintf(stderr, "\n");
- fprintf(stderr, " %18.9f seconds time elapsed",
- avg_stats(&walltime_nsecs_stats)/1e9);
- if (run_count > 1) {
- fprintf(stderr, " ( +- %7.3f%% )",
- 100*stddev_stats(&walltime_nsecs_stats) /
- avg_stats(&walltime_nsecs_stats));
+ if (!csv_output) {
+ if (!null_run)
+ fprintf(output, "\n");
+ fprintf(output, " %17.9f seconds time elapsed",
+ avg_stats(&walltime_nsecs_stats)/1e9);
+ if (run_count > 1) {
+ fprintf(output, " ");
+ print_noise_pct(stddev_stats(&walltime_nsecs_stats),
+ avg_stats(&walltime_nsecs_stats));
+ }
+ fprintf(output, "\n\n");
}
- fprintf(stderr, "\n\n");
}
static volatile int signr = -1;
static void skip_signal(int signo)
{
- if(child_pid == -1)
+ if ((child_pid == -1) || interval)
done = 1;
signr = signo;
+ /*
+ * render child_pid harmless
+ * won't send SIGTERM to a random
+ * process in case of race condition
+ * and fast PID recycling
+ */
+ child_pid = -1;
}
static void sig_atexit(void)
{
+ sigset_t set, oset;
+
+ /*
+ * avoid race condition with SIGCHLD handler
+ * in skip_signal() which is modifying child_pid
+ * goal is to avoid send SIGTERM to a random
+ * process
+ */
+ sigemptyset(&set);
+ sigaddset(&set, SIGCHLD);
+ sigprocmask(SIG_BLOCK, &set, &oset);
+
if (child_pid != -1)
kill(child_pid, SIGTERM);
+ sigprocmask(SIG_SETMASK, &oset, NULL);
+
if (signr == -1)
return;
@@ -516,91 +1403,401 @@ static void sig_atexit(void)
kill(getpid(), signr);
}
-static const char * const stat_usage[] = {
- "perf stat [<options>] [<command>]",
- NULL
+static int stat__set_big_num(const struct option *opt __maybe_unused,
+ const char *s __maybe_unused, int unset)
+{
+ big_num_opt = unset ? 0 : 1;
+ return 0;
+}
+
+static int perf_stat_init_aggr_mode(void)
+{
+ switch (aggr_mode) {
+ case AGGR_SOCKET:
+ if (cpu_map__build_socket_map(evsel_list->cpus, &aggr_map)) {
+ perror("cannot build socket map");
+ return -1;
+ }
+ aggr_get_id = cpu_map__get_socket;
+ break;
+ case AGGR_CORE:
+ if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
+ perror("cannot build core map");
+ return -1;
+ }
+ aggr_get_id = cpu_map__get_core;
+ break;
+ case AGGR_NONE:
+ case AGGR_GLOBAL:
+ default:
+ break;
+ }
+ return 0;
+}
+
+static int setup_events(const char * const *attrs, unsigned len)
+{
+ unsigned i;
+
+ for (i = 0; i < len; i++) {
+ if (parse_events(evsel_list, attrs[i]))
+ return -1;
+ }
+ return 0;
+}
+
+/*
+ * Add default attributes, if there were no attributes specified or
+ * if -d/--detailed, -d -d or -d -d -d is used:
+ */
+static int add_default_attributes(void)
+{
+ struct perf_event_attr default_attrs[] = {
+
+ { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
+ { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
+ { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
+ { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
+
+ { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
+ { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
+ { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
+ { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
+ { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
+ { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
+
};
-static const struct option options[] = {
- OPT_CALLBACK('e', "event", NULL, "event",
+/*
+ * Detailed stats (-d), covering the L1 and last level data caches:
+ */
+ struct perf_event_attr detailed_attrs[] = {
+
+ { .type = PERF_TYPE_HW_CACHE,
+ .config =
+ PERF_COUNT_HW_CACHE_L1D << 0 |
+ (PERF_COUNT_HW_CACHE_OP_READ << 8) |
+ (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
+
+ { .type = PERF_TYPE_HW_CACHE,
+ .config =
+ PERF_COUNT_HW_CACHE_L1D << 0 |
+ (PERF_COUNT_HW_CACHE_OP_READ << 8) |
+ (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
+
+ { .type = PERF_TYPE_HW_CACHE,
+ .config =
+ PERF_COUNT_HW_CACHE_LL << 0 |
+ (PERF_COUNT_HW_CACHE_OP_READ << 8) |
+ (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
+
+ { .type = PERF_TYPE_HW_CACHE,
+ .config =
+ PERF_COUNT_HW_CACHE_LL << 0 |
+ (PERF_COUNT_HW_CACHE_OP_READ << 8) |
+ (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
+};
+
+/*
+ * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
+ */
+ struct perf_event_attr very_detailed_attrs[] = {
+
+ { .type = PERF_TYPE_HW_CACHE,
+ .config =
+ PERF_COUNT_HW_CACHE_L1I << 0 |
+ (PERF_COUNT_HW_CACHE_OP_READ << 8) |
+ (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
+
+ { .type = PERF_TYPE_HW_CACHE,
+ .config =
+ PERF_COUNT_HW_CACHE_L1I << 0 |
+ (PERF_COUNT_HW_CACHE_OP_READ << 8) |
+ (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
+
+ { .type = PERF_TYPE_HW_CACHE,
+ .config =
+ PERF_COUNT_HW_CACHE_DTLB << 0 |
+ (PERF_COUNT_HW_CACHE_OP_READ << 8) |
+ (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
+
+ { .type = PERF_TYPE_HW_CACHE,
+ .config =
+ PERF_COUNT_HW_CACHE_DTLB << 0 |
+ (PERF_COUNT_HW_CACHE_OP_READ << 8) |
+ (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
+
+ { .type = PERF_TYPE_HW_CACHE,
+ .config =
+ PERF_COUNT_HW_CACHE_ITLB << 0 |
+ (PERF_COUNT_HW_CACHE_OP_READ << 8) |
+ (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
+
+ { .type = PERF_TYPE_HW_CACHE,
+ .config =
+ PERF_COUNT_HW_CACHE_ITLB << 0 |
+ (PERF_COUNT_HW_CACHE_OP_READ << 8) |
+ (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
+
+};
+
+/*
+ * Very, very detailed stats (-d -d -d), adding prefetch events:
+ */
+ struct perf_event_attr very_very_detailed_attrs[] = {
+
+ { .type = PERF_TYPE_HW_CACHE,
+ .config =
+ PERF_COUNT_HW_CACHE_L1D << 0 |
+ (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
+ (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
+
+ { .type = PERF_TYPE_HW_CACHE,
+ .config =
+ PERF_COUNT_HW_CACHE_L1D << 0 |
+ (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
+ (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
+};
+
+ /* Set attrs if no event is selected and !null_run: */
+ if (null_run)
+ return 0;
+
+ if (transaction_run) {
+ int err;
+ if (pmu_have_event("cpu", "cycles-ct") &&
+ pmu_have_event("cpu", "el-start"))
+ err = setup_events(transaction_attrs,
+ ARRAY_SIZE(transaction_attrs));
+ else
+ err = setup_events(transaction_limited_attrs,
+ ARRAY_SIZE(transaction_limited_attrs));
+ if (err < 0) {
+ fprintf(stderr, "Cannot set up transaction events\n");
+ return -1;
+ }
+ return 0;
+ }
+
+ if (!evsel_list->nr_entries) {
+ if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
+ return -1;
+ }
+
+ /* Detailed events get appended to the event list: */
+
+ if (detailed_run < 1)
+ return 0;
+
+ /* Append detailed run extra attributes: */
+ if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
+ return -1;
+
+ if (detailed_run < 2)
+ return 0;
+
+ /* Append very detailed run extra attributes: */
+ if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
+ return -1;
+
+ if (detailed_run < 3)
+ return 0;
+
+ /* Append very, very detailed run extra attributes: */
+ return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
+}
+
+int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
+{
+ bool append_file = false;
+ int output_fd = 0;
+ const char *output_name = NULL;
+ const struct option options[] = {
+ OPT_BOOLEAN('T', "transaction", &transaction_run,
+ "hardware transaction statistics"),
+ OPT_CALLBACK('e', "event", &evsel_list, "event",
"event selector. use 'perf list' to list available events",
- parse_events),
+ parse_events_option),
+ OPT_CALLBACK(0, "filter", &evsel_list, "filter",
+ "event filter", parse_filter),
OPT_BOOLEAN('i', "no-inherit", &no_inherit,
"child tasks do not inherit counters"),
- OPT_INTEGER('p', "pid", &target_pid,
- "stat events on existing process id"),
- OPT_INTEGER('t', "tid", &target_tid,
- "stat events on existing thread id"),
- OPT_BOOLEAN('a', "all-cpus", &system_wide,
+ OPT_STRING('p', "pid", &target.pid, "pid",
+ "stat events on existing process id"),
+ OPT_STRING('t', "tid", &target.tid, "tid",
+ "stat events on existing thread id"),
+ OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
"system-wide collection from all CPUs"),
- OPT_BOOLEAN('c', "scale", &scale,
- "scale/normalize counters"),
+ OPT_BOOLEAN('g', "group", &group,
+ "put the counters into a counter group"),
+ OPT_BOOLEAN('c', "scale", &scale, "scale/normalize counters"),
OPT_INCR('v', "verbose", &verbose,
"be more verbose (show counter open errors, etc)"),
OPT_INTEGER('r', "repeat", &run_count,
- "repeat command and print average + stddev (max: 100)"),
+ "repeat command and print average + stddev (max: 100, forever: 0)"),
OPT_BOOLEAN('n', "null", &null_run,
"null run - dont start any counters"),
- OPT_BOOLEAN('B', "big-num", &big_num,
- "print large numbers with thousands\' separators"),
- OPT_STRING('C', "cpu", &cpu_list, "cpu",
+ OPT_INCR('d', "detailed", &detailed_run,
+ "detailed run - start a lot of events"),
+ OPT_BOOLEAN('S', "sync", &sync_run,
+ "call sync() before starting a run"),
+ OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
+ "print large numbers with thousands\' separators",
+ stat__set_big_num),
+ OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
"list of cpus to monitor in system-wide"),
+ OPT_SET_UINT('A', "no-aggr", &aggr_mode,
+ "disable CPU count aggregation", AGGR_NONE),
+ OPT_STRING('x', "field-separator", &csv_sep, "separator",
+ "print counts with custom separator"),
+ OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
+ "monitor event in cgroup name only", parse_cgroups),
+ OPT_STRING('o', "output", &output_name, "file", "output file name"),
+ OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
+ OPT_INTEGER(0, "log-fd", &output_fd,
+ "log output to fd, instead of stderr"),
+ OPT_STRING(0, "pre", &pre_cmd, "command",
+ "command to run prior to the measured command"),
+ OPT_STRING(0, "post", &post_cmd, "command",
+ "command to run after to the measured command"),
+ OPT_UINTEGER('I', "interval-print", &interval,
+ "print counts at regular interval in ms (>= 100)"),
+ OPT_SET_UINT(0, "per-socket", &aggr_mode,
+ "aggregate counts per processor socket", AGGR_SOCKET),
+ OPT_SET_UINT(0, "per-core", &aggr_mode,
+ "aggregate counts per physical processor core", AGGR_CORE),
+ OPT_UINTEGER('D', "delay", &initial_delay,
+ "ms to wait before starting measurement after program start"),
OPT_END()
-};
-
-int cmd_stat(int argc, const char **argv, const char *prefix __used)
-{
- int status;
- int i,j;
+ };
+ const char * const stat_usage[] = {
+ "perf stat [<options>] [<command>]",
+ NULL
+ };
+ int status = -EINVAL, run_idx;
+ const char *mode;
setlocale(LC_ALL, "");
+ evsel_list = perf_evlist__new();
+ if (evsel_list == NULL)
+ return -ENOMEM;
+
argc = parse_options(argc, argv, options, stat_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
- if (!argc && target_pid == -1 && target_tid == -1)
- usage_with_options(stat_usage, options);
- if (run_count <= 0)
- usage_with_options(stat_usage, options);
- /* Set attrs and nr_counters if no event is selected and !null_run */
- if (!null_run && !nr_counters) {
- memcpy(attrs, default_attrs, sizeof(default_attrs));
- nr_counters = ARRAY_SIZE(default_attrs);
+ output = stderr;
+ if (output_name && strcmp(output_name, "-"))
+ output = NULL;
+
+ if (output_name && output_fd) {
+ fprintf(stderr, "cannot use both --output and --log-fd\n");
+ parse_options_usage(stat_usage, options, "o", 1);
+ parse_options_usage(NULL, options, "log-fd", 0);
+ goto out;
}
- if (system_wide)
- nr_cpus = read_cpu_map(cpu_list);
- else
- nr_cpus = 1;
+ if (output_fd < 0) {
+ fprintf(stderr, "argument to --log-fd must be a > 0\n");
+ parse_options_usage(stat_usage, options, "log-fd", 0);
+ goto out;
+ }
- if (nr_cpus < 1)
- usage_with_options(stat_usage, options);
+ if (!output) {
+ struct timespec tm;
+ mode = append_file ? "a" : "w";
- if (target_pid != -1) {
- target_tid = target_pid;
- thread_num = find_all_tid(target_pid, &all_tids);
- if (thread_num <= 0) {
- fprintf(stderr, "Can't find all threads of pid %d\n",
- target_pid);
- usage_with_options(stat_usage, options);
+ output = fopen(output_name, mode);
+ if (!output) {
+ perror("failed to create output file");
+ return -1;
}
- } else {
- all_tids=malloc(sizeof(pid_t));
- if (!all_tids)
- return -ENOMEM;
+ clock_gettime(CLOCK_REALTIME, &tm);
+ fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
+ } else if (output_fd > 0) {
+ mode = append_file ? "a" : "w";
+ output = fdopen(output_fd, mode);
+ if (!output) {
+ perror("Failed opening logfd");
+ return -errno;
+ }
+ }
- all_tids[0] = target_tid;
- thread_num = 1;
+ if (csv_sep) {
+ csv_output = true;
+ if (!strcmp(csv_sep, "\\t"))
+ csv_sep = "\t";
+ } else
+ csv_sep = DEFAULT_SEPARATOR;
+
+ /*
+ * let the spreadsheet do the pretty-printing
+ */
+ if (csv_output) {
+ /* User explicitly passed -B? */
+ if (big_num_opt == 1) {
+ fprintf(stderr, "-B option not supported with -x\n");
+ parse_options_usage(stat_usage, options, "B", 1);
+ parse_options_usage(NULL, options, "x", 1);
+ goto out;
+ } else /* Nope, so disable big number formatting */
+ big_num = false;
+ } else if (big_num_opt == 0) /* User passed --no-big-num */
+ big_num = false;
+
+ if (!argc && target__none(&target))
+ usage_with_options(stat_usage, options);
+
+ if (run_count < 0) {
+ pr_err("Run count must be a positive number\n");
+ parse_options_usage(stat_usage, options, "r", 1);
+ goto out;
+ } else if (run_count == 0) {
+ forever = true;
+ run_count = 1;
+ }
+
+ /* no_aggr, cgroup are for system-wide only */
+ if ((aggr_mode != AGGR_GLOBAL || nr_cgroups) &&
+ !target__has_cpu(&target)) {
+ fprintf(stderr, "both cgroup and no-aggregation "
+ "modes only available in system-wide mode\n");
+
+ parse_options_usage(stat_usage, options, "G", 1);
+ parse_options_usage(NULL, options, "A", 1);
+ parse_options_usage(NULL, options, "a", 1);
+ goto out;
}
- for (i = 0; i < MAX_NR_CPUS; i++) {
- for (j = 0; j < MAX_COUNTERS; j++) {
- fd[i][j] = malloc(sizeof(int)*thread_num);
- if (!fd[i][j])
- return -ENOMEM;
+ if (add_default_attributes())
+ goto out;
+
+ target__validate(&target);
+
+ if (perf_evlist__create_maps(evsel_list, &target) < 0) {
+ if (target__has_task(&target)) {
+ pr_err("Problems finding threads of monitor\n");
+ parse_options_usage(stat_usage, options, "p", 1);
+ parse_options_usage(NULL, options, "t", 1);
+ } else if (target__has_cpu(&target)) {
+ perror("failed to parse CPUs map");
+ parse_options_usage(stat_usage, options, "C", 1);
+ parse_options_usage(NULL, options, "a", 1);
}
+ goto out;
+ }
+ if (interval && interval < 100) {
+ pr_err("print interval must be >= 100ms\n");
+ parse_options_usage(stat_usage, options, "I", 1);
+ goto out;
}
+ if (perf_evlist__alloc_stats(evsel_list, interval))
+ goto out;
+
+ if (perf_stat_init_aggr_mode())
+ goto out;
+
/*
* We dont want to block the signals - that would cause
* child tasks to inherit that and Ctrl-C would not work.
@@ -608,19 +1805,30 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used)
* task, but being ignored by perf stat itself:
*/
atexit(sig_atexit);
- signal(SIGINT, skip_signal);
+ if (!forever)
+ signal(SIGINT, skip_signal);
+ signal(SIGCHLD, skip_signal);
signal(SIGALRM, skip_signal);
signal(SIGABRT, skip_signal);
status = 0;
- for (run_idx = 0; run_idx < run_count; run_idx++) {
+ for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
if (run_count != 1 && verbose)
- fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1);
+ fprintf(output, "[ perf stat: executing run #%d ... ]\n",
+ run_idx + 1);
+
status = run_perf_stat(argc, argv);
+ if (forever && status != -1) {
+ print_stat(argc, argv);
+ perf_stat__reset_stats(evsel_list);
+ }
}
- if (status != -1)
+ if (!forever && status != -1 && !interval)
print_stat(argc, argv);
+ perf_evlist__free_stats(evsel_list);
+out:
+ perf_evlist__delete(evsel_list);
return status;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 13:07:26 +0000