![Stephane Eranian](/assets/img/avatar_default.png)
This patch adds an option (-x/--field-separator) to print counts using a
CSV-style output. The user can pass a custom separator. This makes it very easy
to import counts directly into your favorite spreadsheet without having to
write scripts.
Example:
$ perf stat --field-separator=, -a -- sleep 1
4009.961740,task-clock-msecs
13,context-switches
2,CPU-migrations
189,page-faults
9596385684,cycles
3493659441,instructions
872897069,branches
41562,branch-misses
22424,cache-references
1289,cache-misses
Works also in non-aggregated mode:
$ perf stat -x , -a -A -- sleep 1
CPU0,1002.526168,task-clock-msecs
CPU1,1002.528365,task-clock-msecs
CPU2,1002.523360,task-clock-msecs
CPU3,1002.519878,task-clock-msecs
CPU0,1,context-switches
CPU1,5,context-switches
CPU2,5,context-switches
CPU3,6,context-switches
CPU0,0,CPU-migrations
CPU1,1,CPU-migrations
CPU2,0,CPU-migrations
CPU3,1,CPU-migrations
CPU0,2,page-faults
CPU1,6,page-faults
CPU2,9,page-faults
CPU3,174,page-faults
CPU0,2399439771,cycles
CPU1,2380369063,cycles
CPU2,2399142710,cycles
CPU3,2373161192,cycles
CPU0,872900618,instructions
CPU1,873030960,instructions
CPU2,872714525,instructions
CPU3,874460580,instructions
CPU0,221556839,branches
CPU1,218134342,branches
CPU2,218161730,branches
CPU3,218284093,branches
CPU0,18556,branch-misses
CPU1,1449,branch-misses
CPU2,3447,branch-misses
CPU3,12714,branch-misses
CPU0,8330,cache-references
CPU1,313844,cache-references
CPU2,47993728,cache-references
CPU3,826481,cache-references
CPU0,272,cache-misses
CPU1,5360,cache-misses
CPU2,1342193,cache-misses
CPU3,13992,cache-misses
This second version adds the ability to name a separator and uses
field-separator as the long option to be consistent with perf report.
Commiter note: Since we enabled --big-num by default in 201e0b0
and -x can't be
used with it, we need to notice if the user explicitely enabled or disabled -B,
add code to disable big_num if the user didn't explicitely set --big_num when
-x is used.
Cc: David S. Miller <davem@davemloft.net>
Cc: Frederik Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: paulus@samba.org
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Robert Richter <robert.richter@amd.com>
LKML-Reference: <4cf68aa7.0fedd80a.5294.1203@mx.google.com>
Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
820 lines
20 KiB
C
820 lines
20 KiB
C
/*
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* builtin-stat.c
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*
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* Builtin stat command: Give a precise performance counters summary
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* overview about any workload, CPU or specific PID.
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*
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* Sample output:
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$ perf stat ~/hackbench 10
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Time: 0.104
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Performance counter stats for '/home/mingo/hackbench':
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1255.538611 task clock ticks # 10.143 CPU utilization factor
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54011 context switches # 0.043 M/sec
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385 CPU migrations # 0.000 M/sec
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17755 pagefaults # 0.014 M/sec
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3808323185 CPU cycles # 3033.219 M/sec
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1575111190 instructions # 1254.530 M/sec
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17367895 cache references # 13.833 M/sec
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7674421 cache misses # 6.112 M/sec
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Wall-clock time elapsed: 123.786620 msecs
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*
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* Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
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*
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* Improvements and fixes by:
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*
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* Arjan van de Ven <arjan@linux.intel.com>
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* Yanmin Zhang <yanmin.zhang@intel.com>
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* Wu Fengguang <fengguang.wu@intel.com>
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* Mike Galbraith <efault@gmx.de>
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* Paul Mackerras <paulus@samba.org>
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* Jaswinder Singh Rajput <jaswinder@kernel.org>
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*
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* Released under the GPL v2. (and only v2, not any later version)
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*/
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#include "perf.h"
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#include "builtin.h"
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#include "util/util.h"
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#include "util/parse-options.h"
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#include "util/parse-events.h"
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#include "util/event.h"
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#include "util/debug.h"
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#include "util/header.h"
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#include "util/cpumap.h"
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#include "util/thread.h"
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#include <sys/prctl.h>
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#include <math.h>
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#include <locale.h>
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#define DEFAULT_SEPARATOR " "
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static struct perf_event_attr default_attrs[] = {
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{ .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
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{ .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
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{ .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
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{ .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
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{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
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{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
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{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
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{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
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{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES },
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{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES },
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};
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static bool system_wide = false;
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static int nr_cpus = 0;
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static int run_idx = 0;
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static int run_count = 1;
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static bool no_inherit = false;
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static bool scale = true;
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static bool no_aggr = false;
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static pid_t target_pid = -1;
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static pid_t target_tid = -1;
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static pid_t *all_tids = NULL;
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static int thread_num = 0;
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static pid_t child_pid = -1;
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static bool null_run = false;
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static bool big_num = true;
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static int big_num_opt = -1;
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static const char *cpu_list;
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static const char *csv_sep = NULL;
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static bool csv_output = false;
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static int *fd[MAX_NR_CPUS][MAX_COUNTERS];
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static int event_scaled[MAX_COUNTERS];
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static struct {
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u64 val;
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u64 ena;
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u64 run;
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} cpu_counts[MAX_NR_CPUS][MAX_COUNTERS];
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static volatile int done = 0;
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struct stats
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{
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double n, mean, M2;
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};
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static void update_stats(struct stats *stats, u64 val)
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{
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double delta;
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stats->n++;
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delta = val - stats->mean;
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stats->mean += delta / stats->n;
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stats->M2 += delta*(val - stats->mean);
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}
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static double avg_stats(struct stats *stats)
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{
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return stats->mean;
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}
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/*
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* http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
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*
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* (\Sum n_i^2) - ((\Sum n_i)^2)/n
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* s^2 = -------------------------------
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* n - 1
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*
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* http://en.wikipedia.org/wiki/Stddev
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*
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* The std dev of the mean is related to the std dev by:
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*
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* s
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* s_mean = -------
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* sqrt(n)
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*
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*/
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static double stddev_stats(struct stats *stats)
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{
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double variance = stats->M2 / (stats->n - 1);
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double variance_mean = variance / stats->n;
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return sqrt(variance_mean);
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}
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struct stats event_res_stats[MAX_COUNTERS][3];
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struct stats runtime_nsecs_stats[MAX_NR_CPUS];
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struct stats runtime_cycles_stats[MAX_NR_CPUS];
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struct stats runtime_branches_stats[MAX_NR_CPUS];
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struct stats walltime_nsecs_stats;
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#define MATCH_EVENT(t, c, counter) \
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(attrs[counter].type == PERF_TYPE_##t && \
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attrs[counter].config == PERF_COUNT_##c)
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#define ERR_PERF_OPEN \
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"counter %d, sys_perf_event_open() syscall returned with %d (%s). /bin/dmesg may provide additional information."
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static int create_perf_stat_counter(int counter, bool *perm_err)
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{
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struct perf_event_attr *attr = attrs + counter;
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int thread;
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int ncreated = 0;
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if (scale)
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attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
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PERF_FORMAT_TOTAL_TIME_RUNNING;
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if (system_wide) {
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int cpu;
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for (cpu = 0; cpu < nr_cpus; cpu++) {
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fd[cpu][counter][0] = sys_perf_event_open(attr,
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-1, cpumap[cpu], -1, 0);
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if (fd[cpu][counter][0] < 0) {
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if (errno == EPERM || errno == EACCES)
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*perm_err = true;
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error(ERR_PERF_OPEN, counter,
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fd[cpu][counter][0], strerror(errno));
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} else {
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++ncreated;
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}
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}
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} else {
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attr->inherit = !no_inherit;
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if (target_pid == -1 && target_tid == -1) {
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attr->disabled = 1;
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attr->enable_on_exec = 1;
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}
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for (thread = 0; thread < thread_num; thread++) {
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fd[0][counter][thread] = sys_perf_event_open(attr,
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all_tids[thread], -1, -1, 0);
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if (fd[0][counter][thread] < 0) {
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if (errno == EPERM || errno == EACCES)
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*perm_err = true;
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error(ERR_PERF_OPEN, counter,
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fd[0][counter][thread],
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strerror(errno));
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} else {
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++ncreated;
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}
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}
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}
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return ncreated;
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}
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/*
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* Does the counter have nsecs as a unit?
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*/
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static inline int nsec_counter(int counter)
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{
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if (MATCH_EVENT(SOFTWARE, SW_CPU_CLOCK, counter) ||
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MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter))
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return 1;
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return 0;
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}
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/*
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* Read out the results of a single counter:
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* aggregate counts across CPUs in system-wide mode
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*/
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static void read_counter_aggr(int counter)
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{
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u64 count[3], single_count[3];
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int cpu;
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size_t res, nv;
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int scaled;
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int i, thread;
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count[0] = count[1] = count[2] = 0;
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nv = scale ? 3 : 1;
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for (cpu = 0; cpu < nr_cpus; cpu++) {
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for (thread = 0; thread < thread_num; thread++) {
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if (fd[cpu][counter][thread] < 0)
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continue;
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res = read(fd[cpu][counter][thread],
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single_count, nv * sizeof(u64));
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assert(res == nv * sizeof(u64));
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close(fd[cpu][counter][thread]);
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fd[cpu][counter][thread] = -1;
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count[0] += single_count[0];
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if (scale) {
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count[1] += single_count[1];
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count[2] += single_count[2];
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}
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}
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}
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scaled = 0;
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if (scale) {
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if (count[2] == 0) {
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event_scaled[counter] = -1;
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count[0] = 0;
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return;
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}
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if (count[2] < count[1]) {
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event_scaled[counter] = 1;
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count[0] = (unsigned long long)
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((double)count[0] * count[1] / count[2] + 0.5);
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}
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}
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for (i = 0; i < 3; i++)
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update_stats(&event_res_stats[counter][i], count[i]);
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if (verbose) {
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fprintf(stderr, "%s: %Ld %Ld %Ld\n", event_name(counter),
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count[0], count[1], count[2]);
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}
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/*
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* Save the full runtime - to allow normalization during printout:
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*/
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if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter))
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update_stats(&runtime_nsecs_stats[0], count[0]);
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if (MATCH_EVENT(HARDWARE, HW_CPU_CYCLES, counter))
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update_stats(&runtime_cycles_stats[0], count[0]);
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if (MATCH_EVENT(HARDWARE, HW_BRANCH_INSTRUCTIONS, counter))
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update_stats(&runtime_branches_stats[0], count[0]);
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}
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/*
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* Read out the results of a single counter:
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* do not aggregate counts across CPUs in system-wide mode
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*/
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static void read_counter(int counter)
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{
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u64 count[3];
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int cpu;
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size_t res, nv;
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count[0] = count[1] = count[2] = 0;
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nv = scale ? 3 : 1;
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for (cpu = 0; cpu < nr_cpus; cpu++) {
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if (fd[cpu][counter][0] < 0)
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continue;
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res = read(fd[cpu][counter][0], count, nv * sizeof(u64));
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assert(res == nv * sizeof(u64));
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close(fd[cpu][counter][0]);
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fd[cpu][counter][0] = -1;
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if (scale) {
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if (count[2] == 0) {
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count[0] = 0;
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} else if (count[2] < count[1]) {
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count[0] = (unsigned long long)
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((double)count[0] * count[1] / count[2] + 0.5);
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}
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}
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cpu_counts[cpu][counter].val = count[0]; /* scaled count */
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cpu_counts[cpu][counter].ena = count[1];
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cpu_counts[cpu][counter].run = count[2];
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if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter))
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update_stats(&runtime_nsecs_stats[cpu], count[0]);
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if (MATCH_EVENT(HARDWARE, HW_CPU_CYCLES, counter))
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update_stats(&runtime_cycles_stats[cpu], count[0]);
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if (MATCH_EVENT(HARDWARE, HW_BRANCH_INSTRUCTIONS, counter))
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update_stats(&runtime_branches_stats[cpu], count[0]);
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}
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}
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static int run_perf_stat(int argc __used, const char **argv)
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{
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unsigned long long t0, t1;
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int status = 0;
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int counter, ncreated = 0;
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int child_ready_pipe[2], go_pipe[2];
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bool perm_err = false;
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const bool forks = (argc > 0);
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char buf;
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if (!system_wide)
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nr_cpus = 1;
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if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
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perror("failed to create pipes");
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exit(1);
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}
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if (forks) {
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if ((child_pid = fork()) < 0)
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perror("failed to fork");
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if (!child_pid) {
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close(child_ready_pipe[0]);
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close(go_pipe[1]);
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fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
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/*
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* Do a dummy execvp to get the PLT entry resolved,
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* so we avoid the resolver overhead on the real
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* execvp call.
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*/
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execvp("", (char **)argv);
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/*
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* Tell the parent we're ready to go
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*/
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close(child_ready_pipe[1]);
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/*
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* Wait until the parent tells us to go.
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*/
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if (read(go_pipe[0], &buf, 1) == -1)
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perror("unable to read pipe");
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execvp(argv[0], (char **)argv);
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perror(argv[0]);
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exit(-1);
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}
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if (target_tid == -1 && target_pid == -1 && !system_wide)
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all_tids[0] = child_pid;
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/*
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* Wait for the child to be ready to exec.
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*/
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close(child_ready_pipe[1]);
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close(go_pipe[0]);
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if (read(child_ready_pipe[0], &buf, 1) == -1)
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perror("unable to read pipe");
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close(child_ready_pipe[0]);
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}
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for (counter = 0; counter < nr_counters; counter++)
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ncreated += create_perf_stat_counter(counter, &perm_err);
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if (ncreated < nr_counters) {
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if (perm_err)
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error("You may not have permission to collect %sstats.\n"
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"\t Consider tweaking"
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" /proc/sys/kernel/perf_event_paranoid or running as root.",
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system_wide ? "system-wide " : "");
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die("Not all events could be opened.\n");
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if (child_pid != -1)
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kill(child_pid, SIGTERM);
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return -1;
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}
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/*
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* Enable counters and exec the command:
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*/
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t0 = rdclock();
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if (forks) {
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close(go_pipe[1]);
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wait(&status);
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} else {
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while(!done) sleep(1);
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}
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t1 = rdclock();
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update_stats(&walltime_nsecs_stats, t1 - t0);
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if (no_aggr) {
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for (counter = 0; counter < nr_counters; counter++)
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read_counter(counter);
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} else {
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for (counter = 0; counter < nr_counters; counter++)
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read_counter_aggr(counter);
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}
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return WEXITSTATUS(status);
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}
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static void print_noise(int counter, double avg)
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{
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if (run_count == 1)
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return;
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fprintf(stderr, " ( +- %7.3f%% )",
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100 * stddev_stats(&event_res_stats[counter][0]) / avg);
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}
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static void nsec_printout(int cpu, int counter, double avg)
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{
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double msecs = avg / 1e6;
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char cpustr[16] = { '\0', };
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const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-24s";
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if (no_aggr)
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sprintf(cpustr, "CPU%*d%s",
|
|
csv_output ? 0 : -4,
|
|
cpumap[cpu], csv_sep);
|
|
|
|
fprintf(stderr, fmt, cpustr, msecs, csv_sep, event_name(counter));
|
|
|
|
if (csv_output)
|
|
return;
|
|
|
|
if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) {
|
|
fprintf(stderr, " # %10.3f CPUs ",
|
|
avg / avg_stats(&walltime_nsecs_stats));
|
|
}
|
|
}
|
|
|
|
static void abs_printout(int cpu, int counter, double avg)
|
|
{
|
|
double total, ratio = 0.0;
|
|
char cpustr[16] = { '\0', };
|
|
const char *fmt;
|
|
|
|
if (csv_output)
|
|
fmt = "%s%.0f%s%s";
|
|
else if (big_num)
|
|
fmt = "%s%'18.0f%s%-24s";
|
|
else
|
|
fmt = "%s%18.0f%s%-24s";
|
|
|
|
if (no_aggr)
|
|
sprintf(cpustr, "CPU%*d%s",
|
|
csv_output ? 0 : -4,
|
|
cpumap[cpu], csv_sep);
|
|
else
|
|
cpu = 0;
|
|
|
|
fprintf(stderr, fmt, cpustr, avg, csv_sep, event_name(counter));
|
|
|
|
if (csv_output)
|
|
return;
|
|
|
|
if (MATCH_EVENT(HARDWARE, HW_INSTRUCTIONS, counter)) {
|
|
total = avg_stats(&runtime_cycles_stats[cpu]);
|
|
|
|
if (total)
|
|
ratio = avg / total;
|
|
|
|
fprintf(stderr, " # %10.3f IPC ", ratio);
|
|
} else if (MATCH_EVENT(HARDWARE, HW_BRANCH_MISSES, counter) &&
|
|
runtime_branches_stats[cpu].n != 0) {
|
|
total = avg_stats(&runtime_branches_stats[cpu]);
|
|
|
|
if (total)
|
|
ratio = avg * 100 / total;
|
|
|
|
fprintf(stderr, " # %10.3f %% ", ratio);
|
|
|
|
} else if (runtime_nsecs_stats[cpu].n != 0) {
|
|
total = avg_stats(&runtime_nsecs_stats[cpu]);
|
|
|
|
if (total)
|
|
ratio = 1000.0 * avg / total;
|
|
|
|
fprintf(stderr, " # %10.3f M/sec", ratio);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Print out the results of a single counter:
|
|
* aggregated counts in system-wide mode
|
|
*/
|
|
static void print_counter_aggr(int counter)
|
|
{
|
|
double avg = avg_stats(&event_res_stats[counter][0]);
|
|
int scaled = event_scaled[counter];
|
|
|
|
if (scaled == -1) {
|
|
fprintf(stderr, "%*s%s%-24s\n",
|
|
csv_output ? 0 : 18,
|
|
"<not counted>", csv_sep, event_name(counter));
|
|
return;
|
|
}
|
|
|
|
if (nsec_counter(counter))
|
|
nsec_printout(-1, counter, avg);
|
|
else
|
|
abs_printout(-1, counter, avg);
|
|
|
|
if (csv_output) {
|
|
fputc('\n', stderr);
|
|
return;
|
|
}
|
|
|
|
print_noise(counter, avg);
|
|
|
|
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]);
|
|
|
|
fprintf(stderr, " (scaled from %.2f%%)",
|
|
100 * avg_running / avg_enabled);
|
|
}
|
|
|
|
fprintf(stderr, "\n");
|
|
}
|
|
|
|
/*
|
|
* Print out the results of a single counter:
|
|
* does not use aggregated count in system-wide
|
|
*/
|
|
static void print_counter(int counter)
|
|
{
|
|
u64 ena, run, val;
|
|
int cpu;
|
|
|
|
for (cpu = 0; cpu < nr_cpus; cpu++) {
|
|
val = cpu_counts[cpu][counter].val;
|
|
ena = cpu_counts[cpu][counter].ena;
|
|
run = cpu_counts[cpu][counter].run;
|
|
if (run == 0 || ena == 0) {
|
|
fprintf(stderr, "CPU%*d%s%*s%s%-24s",
|
|
csv_output ? 0 : -4,
|
|
cpumap[cpu], csv_sep,
|
|
csv_output ? 0 : 18,
|
|
"<not counted>", csv_sep,
|
|
event_name(counter));
|
|
|
|
fprintf(stderr, "\n");
|
|
continue;
|
|
}
|
|
|
|
if (nsec_counter(counter))
|
|
nsec_printout(cpu, counter, val);
|
|
else
|
|
abs_printout(cpu, counter, val);
|
|
|
|
if (!csv_output) {
|
|
print_noise(counter, 1.0);
|
|
|
|
if (run != ena) {
|
|
fprintf(stderr, " (scaled from %.2f%%)",
|
|
100.0 * run / ena);
|
|
}
|
|
}
|
|
fprintf(stderr, "\n");
|
|
}
|
|
}
|
|
|
|
static void print_stat(int argc, const char **argv)
|
|
{
|
|
int i, counter;
|
|
|
|
fflush(stdout);
|
|
|
|
if (!csv_output) {
|
|
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 (no_aggr) {
|
|
for (counter = 0; counter < nr_counters; counter++)
|
|
print_counter(counter);
|
|
} else {
|
|
for (counter = 0; counter < nr_counters; counter++)
|
|
print_counter_aggr(counter);
|
|
}
|
|
|
|
if (!csv_output) {
|
|
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));
|
|
}
|
|
fprintf(stderr, "\n\n");
|
|
}
|
|
}
|
|
|
|
static volatile int signr = -1;
|
|
|
|
static void skip_signal(int signo)
|
|
{
|
|
if(child_pid == -1)
|
|
done = 1;
|
|
|
|
signr = signo;
|
|
}
|
|
|
|
static void sig_atexit(void)
|
|
{
|
|
if (child_pid != -1)
|
|
kill(child_pid, SIGTERM);
|
|
|
|
if (signr == -1)
|
|
return;
|
|
|
|
signal(signr, SIG_DFL);
|
|
kill(getpid(), signr);
|
|
}
|
|
|
|
static const char * const stat_usage[] = {
|
|
"perf stat [<options>] [<command>]",
|
|
NULL
|
|
};
|
|
|
|
static int stat__set_big_num(const struct option *opt __used,
|
|
const char *s __used, int unset)
|
|
{
|
|
big_num_opt = unset ? 0 : 1;
|
|
return 0;
|
|
}
|
|
|
|
static const struct option options[] = {
|
|
OPT_CALLBACK('e', "event", NULL, "event",
|
|
"event selector. use 'perf list' to list available events",
|
|
parse_events),
|
|
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,
|
|
"system-wide collection from all CPUs"),
|
|
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)"),
|
|
OPT_BOOLEAN('n', "null", &null_run,
|
|
"null run - dont start any counters"),
|
|
OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
|
|
"print large numbers with thousands\' separators",
|
|
stat__set_big_num),
|
|
OPT_STRING('C', "cpu", &cpu_list, "cpu",
|
|
"list of cpus to monitor in system-wide"),
|
|
OPT_BOOLEAN('A', "no-aggr", &no_aggr,
|
|
"disable CPU count aggregation"),
|
|
OPT_STRING('x', "field-separator", &csv_sep, "separator",
|
|
"print counts with custom separator"),
|
|
OPT_END()
|
|
};
|
|
|
|
int cmd_stat(int argc, const char **argv, const char *prefix __used)
|
|
{
|
|
int status;
|
|
int i,j;
|
|
|
|
setlocale(LC_ALL, "");
|
|
|
|
argc = parse_options(argc, argv, options, stat_usage,
|
|
PARSE_OPT_STOP_AT_NON_OPTION);
|
|
|
|
if (csv_sep)
|
|
csv_output = true;
|
|
else
|
|
csv_sep = DEFAULT_SEPARATOR;
|
|
|
|
/*
|
|
* let the spreadsheet do the pretty-printing
|
|
*/
|
|
if (csv_output) {
|
|
/* User explicitely passed -B? */
|
|
if (big_num_opt == 1) {
|
|
fprintf(stderr, "-B option not supported with -x\n");
|
|
usage_with_options(stat_usage, options);
|
|
} 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_pid == -1 && target_tid == -1)
|
|
usage_with_options(stat_usage, options);
|
|
if (run_count <= 0)
|
|
usage_with_options(stat_usage, options);
|
|
|
|
/* no_aggr is for system-wide only */
|
|
if (no_aggr && !system_wide)
|
|
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);
|
|
}
|
|
|
|
if (system_wide)
|
|
nr_cpus = read_cpu_map(cpu_list);
|
|
else
|
|
nr_cpus = 1;
|
|
|
|
if (nr_cpus < 1)
|
|
usage_with_options(stat_usage, options);
|
|
|
|
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);
|
|
}
|
|
} else {
|
|
all_tids=malloc(sizeof(pid_t));
|
|
if (!all_tids)
|
|
return -ENOMEM;
|
|
|
|
all_tids[0] = target_tid;
|
|
thread_num = 1;
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* We dont want to block the signals - that would cause
|
|
* child tasks to inherit that and Ctrl-C would not work.
|
|
* What we want is for Ctrl-C to work in the exec()-ed
|
|
* task, but being ignored by perf stat itself:
|
|
*/
|
|
atexit(sig_atexit);
|
|
signal(SIGINT, skip_signal);
|
|
signal(SIGALRM, skip_signal);
|
|
signal(SIGABRT, skip_signal);
|
|
|
|
status = 0;
|
|
for (run_idx = 0; run_idx < run_count; run_idx++) {
|
|
if (run_count != 1 && verbose)
|
|
fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1);
|
|
status = run_perf_stat(argc, argv);
|
|
}
|
|
|
|
if (status != -1)
|
|
print_stat(argc, argv);
|
|
|
|
return status;
|
|
}
|