diff options
Diffstat (limited to 'tools/perf/builtin-stat.c')
| -rw-r--r-- | tools/perf/builtin-stat.c | 136 |
1 files changed, 54 insertions, 82 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 861f0aec77ae..e8cd4d81b06e 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -51,13 +51,13 @@ #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 <sys/prctl.h> -#include <math.h> #include <locale.h> #define DEFAULT_SEPARATOR " " @@ -199,11 +199,6 @@ static int output_fd; static volatile int done = 0; -struct stats -{ - double n, mean, M2; -}; - struct perf_stat { struct stats res_stats[3]; }; @@ -220,48 +215,14 @@ static void perf_evsel__free_stat_priv(struct perf_evsel *evsel) 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) +static inline struct cpu_map *perf_evsel__cpus(struct perf_evsel *evsel) { - return stats->mean; + return (evsel->cpus && !target.cpu_list) ? evsel->cpus : evsel_list->cpus; } -/* - * 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 inline int perf_evsel__nr_cpus(struct perf_evsel *evsel) { - 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); + return perf_evsel__cpus(evsel)->nr; } static struct stats runtime_nsecs_stats[MAX_NR_CPUS]; @@ -281,13 +242,9 @@ 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; @@ -299,8 +256,7 @@ retry: evsel->attr.exclude_guest = evsel->attr.exclude_host = 0; if (perf_target__has_cpu(&target)) { - ret = perf_evsel__open_per_cpu(evsel, evsel_list->cpus, - group, group_fd); + ret = perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel)); if (ret) goto check_ret; return 0; @@ -311,8 +267,7 @@ retry: attr->enable_on_exec = 1; } - ret = perf_evsel__open_per_thread(evsel, evsel_list->threads, - group, group_fd); + ret = perf_evsel__open_per_thread(evsel, evsel_list->threads); if (!ret) return 0; /* fall through */ @@ -382,7 +337,7 @@ static int read_counter_aggr(struct perf_evsel *counter) u64 *count = counter->counts->aggr.values; int i; - if (__perf_evsel__read(counter, evsel_list->cpus->nr, + if (__perf_evsel__read(counter, perf_evsel__nr_cpus(counter), evsel_list->threads->nr, scale) < 0) return -1; @@ -411,7 +366,7 @@ static int read_counter(struct perf_evsel *counter) u64 *count; int cpu; - for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) { + for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) { if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0) return -1; @@ -423,7 +378,7 @@ static int read_counter(struct perf_evsel *counter) return 0; } -static int run_perf_stat(int argc __used, const char **argv) +static int run_perf_stat(int argc __maybe_unused, const char **argv) { unsigned long long t0, t1; struct perf_evsel *counter, *first; @@ -434,7 +389,7 @@ static int run_perf_stat(int argc __used, const char **argv) if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) { perror("failed to create pipes"); - exit(1); + return -1; } if (forks) { @@ -483,7 +438,10 @@ static int run_perf_stat(int argc __used, const char **argv) close(child_ready_pipe[0]); } - first = list_entry(evsel_list->entries.next, struct perf_evsel, node); + if (group) + perf_evlist__set_leader(evsel_list); + + first = perf_evlist__first(evsel_list); list_for_each_entry(counter, &evsel_list->entries, node) { if (create_perf_stat_counter(counter, first) < 0) { @@ -513,13 +471,14 @@ static int run_perf_stat(int argc __used, const char **argv) } if (child_pid != -1) kill(child_pid, SIGTERM); - die("Not all events could be opened.\n"); + + pr_err("Not all events could be opened.\n"); return -1; } counter->supported = true; } - if (perf_evlist__set_filters(evsel_list)) { + if (perf_evlist__apply_filters(evsel_list)) { error("failed to set filter with %d (%s)\n", errno, strerror(errno)); return -1; @@ -546,12 +505,12 @@ static int run_perf_stat(int argc __used, const char **argv) 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); + perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1); } } else { list_for_each_entry(counter, &evsel_list->entries, node) { read_counter_aggr(counter); - perf_evsel__close_fd(counter, evsel_list->cpus->nr, + perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), evsel_list->threads->nr); } } @@ -561,10 +520,7 @@ static int run_perf_stat(int argc __used, const char **argv) static void print_noise_pct(double total, double avg) { - double pct = 0.0; - - if (avg) - pct = 100.0*total/avg; + double pct = rel_stddev_stats(total, avg); if (csv_output) fprintf(output, "%s%.2f%%", csv_sep, pct); @@ -592,7 +548,7 @@ static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg) if (no_aggr) sprintf(cpustr, "CPU%*d%s", csv_output ? 0 : -4, - evsel_list->cpus->map[cpu], csv_sep); + perf_evsel__cpus(evsel)->map[cpu], csv_sep); fprintf(output, fmt, cpustr, msecs, csv_sep, perf_evsel__name(evsel)); @@ -636,7 +592,9 @@ static const char *get_ratio_color(enum grc_type type, double ratio) return color; } -static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __used, double avg) +static void print_stalled_cycles_frontend(int cpu, + struct perf_evsel *evsel + __maybe_unused, double avg) { double total, ratio = 0.0; const char *color; @@ -653,7 +611,9 @@ static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __us fprintf(output, " frontend cycles idle "); } -static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __used, double avg) +static void print_stalled_cycles_backend(int cpu, + struct perf_evsel *evsel + __maybe_unused, double avg) { double total, ratio = 0.0; const char *color; @@ -670,7 +630,9 @@ static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __use fprintf(output, " backend cycles idle "); } -static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg) +static void print_branch_misses(int cpu, + struct perf_evsel *evsel __maybe_unused, + double avg) { double total, ratio = 0.0; const char *color; @@ -687,7 +649,9 @@ static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double fprintf(output, " of all branches "); } -static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, double avg) +static void print_l1_dcache_misses(int cpu, + struct perf_evsel *evsel __maybe_unused, + double avg) { double total, ratio = 0.0; const char *color; @@ -704,7 +668,9 @@ static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, dou fprintf(output, " of all L1-dcache hits "); } -static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, double avg) +static void print_l1_icache_misses(int cpu, + struct perf_evsel *evsel __maybe_unused, + double avg) { double total, ratio = 0.0; const char *color; @@ -721,7 +687,9 @@ static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, dou fprintf(output, " of all L1-icache hits "); } -static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg) +static void print_dtlb_cache_misses(int cpu, + struct perf_evsel *evsel __maybe_unused, + double avg) { double total, ratio = 0.0; const char *color; @@ -738,7 +706,9 @@ static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, do fprintf(output, " of all dTLB cache hits "); } -static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg) +static void print_itlb_cache_misses(int cpu, + struct perf_evsel *evsel __maybe_unused, + double avg) { double total, ratio = 0.0; const char *color; @@ -755,7 +725,9 @@ static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, do fprintf(output, " of all iTLB cache hits "); } -static void print_ll_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg) +static void print_ll_cache_misses(int cpu, + struct perf_evsel *evsel __maybe_unused, + double avg) { double total, ratio = 0.0; const char *color; @@ -788,7 +760,7 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg) if (no_aggr) sprintf(cpustr, "CPU%*d%s", csv_output ? 0 : -4, - evsel_list->cpus->map[cpu], csv_sep); + perf_evsel__cpus(evsel)->map[cpu], csv_sep); else cpu = 0; @@ -949,14 +921,14 @@ static void print_counter(struct perf_evsel *counter) u64 ena, run, val; int cpu; - for (cpu = 0; cpu < evsel_list->cpus->nr; 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 (run == 0 || ena == 0) { fprintf(output, "CPU%*d%s%*s%s%*s", csv_output ? 0 : -4, - evsel_list->cpus->map[cpu], csv_sep, + perf_evsel__cpus(counter)->map[cpu], csv_sep, csv_output ? 0 : 18, counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED, csv_sep, @@ -1061,8 +1033,8 @@ static const char * const stat_usage[] = { NULL }; -static int stat__set_big_num(const struct option *opt __used, - const char *s __used, int unset) +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; @@ -1156,7 +1128,7 @@ static int add_default_attributes(void) return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs); } -int cmd_stat(int argc, const char **argv, const char *prefix __used) +int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused) { struct perf_evsel *pos; int status = -ENOMEM; @@ -1192,7 +1164,7 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used) output = fopen(output_name, mode); if (!output) { perror("failed to create output file"); - exit(-1); + return -1; } clock_gettime(CLOCK_REALTIME, &tm); fprintf(output, "# started on %s\n", ctime(&tm.tv_sec)); @@ -1255,7 +1227,7 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used) 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) + perf_evsel__alloc_counts(pos, perf_evsel__nr_cpus(pos)) < 0) goto out_free_fd; } |