From 2cee77c4505fc581f41b44e18ffc0953b67a414c Mon Sep 17 00:00:00 2001 From: David Ahern Date: Mon, 30 May 2011 08:55:59 -0600 Subject: [PATCH] perf stat: clarify unsupported events from uncounted events perf stat continues running even if the event list contains counters that are not supported. The resulting output then contains for those events which gets confusing as to which events are supported, but not counted and which are not supported. Before: perf stat -ddd -- sleep 1 Performance counter stats for 'sleep 1': 0.571283 task-clock # 0.001 CPUs utilized 1 context-switches # 0.002 M/sec 0 CPU-migrations # 0.000 M/sec 157 page-faults # 0.275 M/sec 1,037,707 cycles # 1.816 GHz stalled-cycles-frontend stalled-cycles-backend 654,499 instructions # 0.63 insns per cycle 136,129 branches # 238.286 M/sec branch-misses L1-dcache-loads L1-dcache-load-misses LLC-loads LLC-load-misses L1-icache-loads L1-icache-load-misses dTLB-loads dTLB-load-misses iTLB-loads iTLB-load-misses L1-dcache-prefetches L1-dcache-prefetch-misses 1.001004836 seconds time elapsed After: perf stat -ddd -- sleep 1 Performance counter stats for 'sleep 1': 1.350326 task-clock # 0.001 CPUs utilized 2 context-switches # 0.001 M/sec 0 CPU-migrations # 0.000 M/sec 157 page-faults # 0.116 M/sec 11,986 cycles # 0.009 GHz stalled-cycles-frontend stalled-cycles-backend 496,986 instructions # 41.46 insns per cycle 138,065 branches # 102.246 M/sec 7,245 branch-misses # 5.25% of all branches L1-dcache-loads L1-dcache-load-misses LLC-loads LLC-load-misses L1-icache-loads L1-icache-load-misses dTLB-loads dTLB-load-misses iTLB-loads iTLB-load-misses L1-dcache-prefetches L1-dcache-prefetch-misses 1.002397333 seconds time elapsed v1->v2: changed supported type from int to bool v2->v3 fixed vertical alignment of new struct element Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/1306767359-13221-1-git-send-email-dsahern@gmail.com Signed-off-by: David Ahern Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-stat.c | 9 +++++++-- tools/perf/util/evsel.h | 1 + 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index a9f06715e44d..784ed6d6e0d6 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -61,6 +61,8 @@ #include #define DEFAULT_SEPARATOR " " +#define CNTR_NOT_SUPPORTED "" +#define CNTR_NOT_COUNTED "" static struct perf_event_attr default_attrs[] = { @@ -448,6 +450,7 @@ static int run_perf_stat(int argc __used, const char **argv) if (verbose) ui__warning("%s event is not supported by the kernel.\n", event_name(counter)); + counter->supported = false; continue; } @@ -466,6 +469,7 @@ static int run_perf_stat(int argc __used, const char **argv) die("Not all events could be opened.\n"); return -1; } + counter->supported = true; } if (perf_evlist__set_filters(evsel_list)) { @@ -861,7 +865,7 @@ static void print_counter_aggr(struct perf_evsel *counter) if (scaled == -1) { fprintf(stderr, "%*s%s%*s", csv_output ? 0 : 18, - "", + counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED, csv_sep, csv_output ? 0 : -24, event_name(counter)); @@ -914,7 +918,8 @@ static void print_counter(struct perf_evsel *counter) csv_output ? 0 : -4, evsel_list->cpus->map[cpu], csv_sep, csv_output ? 0 : 18, - "", csv_sep, + counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED, + csv_sep, csv_output ? 0 : -24, event_name(counter)); diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index 7e9366e4490b..e9a31554e265 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -61,6 +61,7 @@ struct perf_evsel { off_t id_offset; }; struct cgroup_sel *cgrp; + bool supported; }; struct cpu_map;