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-rw-r--r--tools/perf/builtin-stat.c1298
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diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
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+/*
+ * builtin-stat.c
+ *
+ * Builtin stat command: Give a precise performance counters summary
+ * overview about any workload, CPU or specific PID.
+ *
+ * Sample output:
+
+ $ perf stat ./hackbench 10
+
+ Time: 0.118
+
+ Performance counter stats for './hackbench 10':
+
+ 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) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
+ *
+ * Improvements and fixes by:
+ *
+ * Arjan van de Ven <arjan@linux.intel.com>
+ * Yanmin Zhang <yanmin.zhang@intel.com>
+ * Wu Fengguang <fengguang.wu@intel.com>
+ * Mike Galbraith <efault@gmx.de>
+ * Paul Mackerras <paulus@samba.org>
+ * Jaswinder Singh Rajput <jaswinder@kernel.org>
+ *
+ * Released under the GPL v2. (and only v2, not any later version)
+ */
+
+#include "perf.h"
+#include "builtin.h"
+#include "util/util.h"
+#include "util/parse-options.h"
+#include "util/parse-events.h"
+#include "util/event.h"
+#include "util/evlist.h"
+#include "util/evsel.h"
+#include "util/debug.h"
+#include "util/color.h"
+#include "util/header.h"
+#include "util/cpumap.h"
+#include "util/thread.h"
+#include "util/thread_map.h"
+
+#include <sys/prctl.h>
+#include <math.h>
+#include <locale.h>
+
+#define DEFAULT_SEPARATOR " "
+#define CNTR_NOT_SUPPORTED "<not supported>"
+#define CNTR_NOT_COUNTED "<not counted>"
+
+static 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 },
+
+};
+
+/*
+ * Detailed stats (-d), covering the L1 and last level data caches:
+ */
+static 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:
+ */
+static 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:
+ */
+static 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) },
+};
+
+
+
+struct perf_evlist *evsel_list;
+
+static bool system_wide = false;
+static int run_idx = 0;
+
+static int run_count = 1;
+static bool no_inherit = false;
+static bool scale = true;
+static bool no_aggr = false;
+static const char *target_pid;
+static const char *target_tid;
+static pid_t child_pid = -1;
+static bool null_run = false;
+static int detailed_run = 0;
+static bool sync_run = false;
+static bool big_num = true;
+static int big_num_opt = -1;
+static const char *cpu_list;
+static const char *csv_sep = NULL;
+static bool csv_output = false;
+static bool group = false;
+static const char *output_name = NULL;
+static FILE *output = NULL;
+static int output_fd;
+
+static volatile int done = 0;
+
+struct stats
+{
+ double n, mean, M2;
+};
+
+struct perf_stat {
+ struct stats res_stats[3];
+};
+
+static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
+{
+ evsel->priv = zalloc(sizeof(struct perf_stat));
+ return evsel->priv == NULL ? -ENOMEM : 0;
+}
+
+static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
+{
+ free(evsel->priv);
+ evsel->priv = NULL;
+}
+
+static void update_stats(struct stats *stats, u64 val)
+{
+ double delta;
+
+ stats->n++;
+ delta = val - stats->mean;
+ stats->mean += delta / stats->n;
+ stats->M2 += delta*(val - stats->mean);
+}
+
+static double avg_stats(struct stats *stats)
+{
+ return stats->mean;
+}
+
+/*
+ * 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)
+{
+ double variance, variance_mean;
+
+ if (!stats->n)
+ return 0.0;
+
+ variance = stats->M2 / (stats->n - 1);
+ variance_mean = variance / stats->n;
+
+ return sqrt(variance_mean);
+}
+
+struct stats runtime_nsecs_stats[MAX_NR_CPUS];
+struct stats runtime_cycles_stats[MAX_NR_CPUS];
+struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
+struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
+struct stats runtime_branches_stats[MAX_NR_CPUS];
+struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
+struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
+struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
+struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
+struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
+struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
+struct stats walltime_nsecs_stats;
+
+static int create_perf_stat_counter(struct perf_evsel *evsel,
+ struct perf_evsel *first)
+{
+ struct perf_event_attr *attr = &evsel->attr;
+ struct xyarray *group_fd = NULL;
+ bool exclude_guest_missing = false;
+ int ret;
+
+ if (group && evsel != first)
+ group_fd = first->fd;
+
+ if (scale)
+ attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
+ PERF_FORMAT_TOTAL_TIME_RUNNING;
+
+ attr->inherit = !no_inherit;
+
+retry:
+ if (exclude_guest_missing)
+ evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
+
+ if (system_wide) {
+ ret = perf_evsel__open_per_cpu(evsel, evsel_list->cpus,
+ group, group_fd);
+ if (ret)
+ goto check_ret;
+ return 0;
+ }
+
+ if (!target_pid && !target_tid && (!group || evsel == first)) {
+ attr->disabled = 1;
+ attr->enable_on_exec = 1;
+ }
+
+ ret = perf_evsel__open_per_thread(evsel, evsel_list->threads,
+ group, group_fd);
+ if (!ret)
+ return 0;
+ /* fall through */
+check_ret:
+ if (ret && errno == EINVAL) {
+ if (!exclude_guest_missing &&
+ (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
+ pr_debug("Old kernel, cannot exclude "
+ "guest or host samples.\n");
+ exclude_guest_missing = true;
+ goto retry;
+ }
+ }
+ return ret;
+}
+
+/*
+ * Does the counter have nsecs as a unit?
+ */
+static inline int nsec_counter(struct perf_evsel *evsel)
+{
+ if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
+ perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
+ return 1;
+
+ return 0;
+}
+
+/*
+ * 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 (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, evsel_list->cpus->nr,
+ evsel_list->threads->nr, 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",
+ event_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 int read_counter(struct perf_evsel *counter)
+{
+ u64 *count;
+ int cpu;
+
+ for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
+ if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
+ return -1;
+
+ count = counter->counts->cpu[cpu].values;
+
+ update_shadow_stats(counter, count);
+ }
+
+ return 0;
+}
+
+static int run_perf_stat(int argc __used, const char **argv)
+{
+ unsigned long long t0, t1;
+ struct perf_evsel *counter, *first;
+ int status = 0;
+ int child_ready_pipe[2], go_pipe[2];
+ const bool forks = (argc > 0);
+ char buf;
+
+ if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
+ perror("failed to create pipes");
+ exit(1);
+ }
+
+ if (forks) {
+ if ((child_pid = fork()) < 0)
+ perror("failed to fork");
+
+ if (!child_pid) {
+ close(child_ready_pipe[0]);
+ close(go_pipe[1]);
+ fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
+
+ /*
+ * Do a dummy execvp to get the PLT entry resolved,
+ * so we avoid the resolver overhead on the real
+ * execvp call.
+ */
+ execvp("", (char **)argv);
+
+ /*
+ * Tell the parent we're ready to go
+ */
+ close(child_ready_pipe[1]);
+
+ /*
+ * Wait until the parent tells us to go.
+ */
+ if (read(go_pipe[0], &buf, 1) == -1)
+ perror("unable to read pipe");
+
+ execvp(argv[0], (char **)argv);
+
+ perror(argv[0]);
+ exit(-1);
+ }
+
+ if (!target_tid && !target_pid && !system_wide)
+ evsel_list->threads->map[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]);
+ }
+
+ first = list_entry(evsel_list->entries.next, struct perf_evsel, node);
+
+ list_for_each_entry(counter, &evsel_list->entries, node) {
+ if (create_perf_stat_counter(counter, first) < 0) {
+ /*
+ * PPC returns ENXIO for HW counters until 2.6.37
+ * (behavior changed with commit b0a873e).
+ */
+ if (errno == EINVAL || errno == ENOSYS ||
+ errno == ENOENT || errno == EOPNOTSUPP ||
+ errno == ENXIO) {
+ if (verbose)
+ ui__warning("%s event is not supported by the kernel.\n",
+ event_name(counter));
+ counter->supported = false;
+ continue;
+ }
+
+ if (errno == EPERM || errno == EACCES) {
+ error("You may not have permission to collect %sstats.\n"
+ "\t Consider tweaking"
+ " /proc/sys/kernel/perf_event_paranoid or running as root.",
+ system_wide ? "system-wide " : "");
+ } else {
+ error("open_counter returned with %d (%s). "
+ "/bin/dmesg may provide additional information.\n",
+ errno, strerror(errno));
+ }
+ if (child_pid != -1)
+ kill(child_pid, SIGTERM);
+ die("Not all events could be opened.\n");
+ return -1;
+ }
+ counter->supported = true;
+ }
+
+ if (perf_evlist__set_filters(evsel_list)) {
+ error("failed to set filter with %d (%s)\n", errno,
+ strerror(errno));
+ return -1;
+ }
+
+ /*
+ * Enable counters and exec the command:
+ */
+ t0 = rdclock();
+
+ if (forks) {
+ close(go_pipe[1]);
+ wait(&status);
+ if (WIFSIGNALED(status))
+ psignal(WTERMSIG(status), argv[0]);
+ } else {
+ while(!done) sleep(1);
+ }
+
+ t1 = rdclock();
+
+ update_stats(&walltime_nsecs_stats, t1 - t0);
+
+ if (no_aggr) {
+ list_for_each_entry(counter, &evsel_list->entries, node) {
+ read_counter(counter);
+ perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1);
+ }
+ } else {
+ list_for_each_entry(counter, &evsel_list->entries, node) {
+ read_counter_aggr(counter);
+ perf_evsel__close_fd(counter, evsel_list->cpus->nr,
+ evsel_list->threads->nr);
+ }
+ }
+
+ return WEXITSTATUS(status);
+}
+
+static void print_noise_pct(double total, double avg)
+{
+ double pct = 0.0;
+
+ if (avg)
+ pct = 100.0*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;
+
+ ps = evsel->priv;
+ print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
+}
+
+static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
+{
+ double msecs = avg / 1e6;
+ char cpustr[16] = { '\0', };
+ const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
+
+ if (no_aggr)
+ sprintf(cpustr, "CPU%*d%s",
+ csv_output ? 0 : -4,
+ evsel_list->cpus->map[cpu], csv_sep);
+
+ fprintf(output, fmt, cpustr, msecs, csv_sep, event_name(evsel));
+
+ if (evsel->cgrp)
+ fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
+
+ if (csv_output)
+ 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, " ");
+}
+
+/* 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 __used, 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_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 __used, 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 __used, 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 __used, 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 __used, 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 __used, 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 __used, 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 __used, 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, struct perf_evsel *evsel, 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%-25s";
+ else
+ fmt = "%s%18.0f%s%-25s";
+
+ if (no_aggr)
+ sprintf(cpustr, "CPU%*d%s",
+ csv_output ? 0 : -4,
+ evsel_list->cpus->map[cpu], csv_sep);
+ else
+ cpu = 0;
+
+ fprintf(output, fmt, cpustr, avg, csv_sep, event_name(evsel));
+
+ if (evsel->cgrp)
+ fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
+
+ if (csv_output)
+ 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 # %5.2f stalled cycles per insn", ratio);
+ }
+
+ } 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(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 = 1.0 * avg / total;
+
+ fprintf(output, " # %8.3f GHz ", 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, " ");
+ }
+}
+
+/*
+ * Print out the results of a single counter:
+ * aggregated counts in system-wide mode
+ */
+static void print_counter_aggr(struct perf_evsel *counter)
+{
+ struct perf_stat *ps = counter->priv;
+ double avg = avg_stats(&ps->res_stats[0]);
+ int scaled = counter->counts->scaled;
+
+ if (scaled == -1) {
+ fprintf(output, "%*s%s%*s",
+ csv_output ? 0 : 18,
+ counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
+ csv_sep,
+ csv_output ? 0 : -24,
+ event_name(counter));
+
+ if (counter->cgrp)
+ fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
+
+ fputc('\n', output);
+ return;
+ }
+
+ if (nsec_counter(counter))
+ nsec_printout(-1, counter, avg);
+ else
+ abs_printout(-1, counter, avg);
+
+ print_noise(counter, avg);
+
+ if (csv_output) {
+ fputc('\n', output);
+ return;
+ }
+
+ if (scaled) {
+ double avg_enabled, avg_running;
+
+ avg_enabled = avg_stats(&ps->res_stats[1]);
+ avg_running = avg_stats(&ps->res_stats[2]);
+
+ 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)
+{
+ u64 ena, run, val;
+ int cpu;
+
+ for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
+ val = counter->counts->cpu[cpu].val;
+ ena = counter->counts->cpu[cpu].ena;
+ run = counter->counts->cpu[cpu].run;
+ if (run == 0 || ena == 0) {
+ fprintf(output, "CPU%*d%s%*s%s%*s",
+ csv_output ? 0 : -4,
+ evsel_list->cpus->map[cpu], csv_sep,
+ csv_output ? 0 : 18,
+ counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
+ csv_sep,
+ csv_output ? 0 : -24,
+ event_name(counter));
+
+ if (counter->cgrp)
+ fprintf(output, "%s%s",
+ csv_sep, counter->cgrp->name);
+
+ fputc('\n', output);
+ 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(output, " (%.2f%%)",
+ 100.0 * run / ena);
+ }
+ fputc('\n', output);
+ }
+}
+
+static void print_stat(int argc, const char **argv)
+{
+ struct perf_evsel *counter;
+ int i;
+
+ fflush(stdout);
+
+ if (!csv_output) {
+ fprintf(output, "\n");
+ fprintf(output, " Performance counter stats for ");
+ if (!target_pid && !target_tid) {
+ 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");
+ }
+
+ if (no_aggr) {
+ list_for_each_entry(counter, &evsel_list->entries, node)
+ print_counter(counter);
+ } else {
+ list_for_each_entry(counter, &evsel_list->entries, node)
+ print_counter_aggr(counter);
+ }
+
+ 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");
+ }
+}
+
+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 bool append_file;
+
+static const struct option options[] = {
+ OPT_CALLBACK('e', "event", &evsel_list, "event",
+ "event selector. use 'perf list' to list available 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_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", &system_wide,
+ "system-wide collection from all CPUs"),
+ 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)"),
+ OPT_BOOLEAN('n', "null", &null_run,
+ "null run - dont start any counters"),
+ 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", &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_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_END()
+};
+
+/*
+ * 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)
+{
+ /* Set attrs if no event is selected and !null_run: */
+ if (null_run)
+ return 0;
+
+ if (!evsel_list->nr_entries) {
+ if (perf_evlist__add_attrs_array(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_attrs_array(evsel_list, detailed_attrs) < 0)
+ return -1;
+
+ if (detailed_run < 2)
+ return 0;
+
+ /* Append very detailed run extra attributes: */
+ if (perf_evlist__add_attrs_array(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_attrs_array(evsel_list, very_very_detailed_attrs);
+}
+
+int cmd_stat(int argc, const char **argv, const char *prefix __used)
+{
+ struct perf_evsel *pos;
+ int status = -ENOMEM;
+ const char *mode;
+
+ setlocale(LC_ALL, "");
+
+ evsel_list = perf_evlist__new(NULL, NULL);
+ if (evsel_list == NULL)
+ return -ENOMEM;
+
+ argc = parse_options(argc, argv, options, stat_usage,
+ PARSE_OPT_STOP_AT_NON_OPTION);
+
+ 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");
+ usage_with_options(stat_usage, options);
+ }
+ if (!output) {
+ struct timespec tm;
+ mode = append_file ? "a" : "w";
+
+ output = fopen(output_name, mode);
+ if (!output) {
+ perror("failed to create output file");
+ exit(-1);
+ }
+ clock_gettime(CLOCK_REALTIME, &tm);
+ fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
+ } else if (output_fd != 2) {
+ mode = append_file ? "a" : "w";
+ output = fdopen(output_fd, mode);
+ if (!output) {
+ perror("Failed opening logfd");
+ return -errno;
+ }
+ }
+
+ 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");
+ 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 && !target_tid)
+ usage_with_options(stat_usage, options);
+ if (run_count <= 0)
+ usage_with_options(stat_usage, options);
+
+ /* no_aggr, cgroup are for system-wide only */
+ if ((no_aggr || nr_cgroups) && !system_wide) {
+ fprintf(stderr, "both cgroup and no-aggregation "
+ "modes only available in system-wide mode\n");
+
+ usage_with_options(stat_usage, options);
+ }
+
+ if (add_default_attributes())
+ goto out;
+
+ if (target_pid)
+ target_tid = target_pid;
+
+ evsel_list->threads = thread_map__new_str(target_pid,
+ target_tid, UINT_MAX);
+ if (evsel_list->threads == NULL) {
+ pr_err("Problems finding threads of monitor\n");
+ usage_with_options(stat_usage, options);
+ }
+
+ if (system_wide)
+ evsel_list->cpus = cpu_map__new(cpu_list);
+ else
+ evsel_list->cpus = cpu_map__dummy_new();
+
+ if (evsel_list->cpus == NULL) {
+ perror("failed to parse CPUs map");
+ usage_with_options(stat_usage, options);
+ return -1;
+ }
+
+ list_for_each_entry(pos, &evsel_list->entries, node) {
+ if (perf_evsel__alloc_stat_priv(pos) < 0 ||
+ perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0)
+ goto out_free_fd;
+ }
+
+ /*
+ * 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(output, "[ perf stat: executing run #%d ... ]\n",
+ run_idx + 1);
+
+ if (sync_run)
+ sync();
+
+ status = run_perf_stat(argc, argv);
+ }
+
+ if (status != -1)
+ print_stat(argc, argv);
+out_free_fd:
+ list_for_each_entry(pos, &evsel_list->entries, node)
+ perf_evsel__free_stat_priv(pos);
+ perf_evlist__delete_maps(evsel_list);
+out:
+ perf_evlist__delete(evsel_list);
+ return status;
+}
generated by cgit (git 2.34.1) at 2024-12-20 08:36:56 +0000