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| author | Andi Kleen <ak@linux.intel.com> | 2016-03-01 21:57:52 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-03-03 17:10:40 +0300 |
| commit | fb4605ba47e772ff9d62d1d54218a832ec8b3e1d (patch) | |
| tree | 1d31d9bf1378cc014ce4a96fa818b1ef119256b9 | |
| parent | 1b69317d2dc80bc8e1d005e1a771c4f5bff3dabe (diff) | |
| download | linux-fb4605ba47e772ff9d62d1d54218a832ec8b3e1d.tar.xz | |
perf stat: Check for frontend stalled for metrics
Add an extra check for frontend stalled in the metrics. This avoids an
extra column for the --metric-only case when the CPU does not support
frontend stalled.
v2: Add separate init function
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/1456858672-21594-8-git-send-email-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/builtin-stat.c | 1 | ||||
| -rw-r--r-- | tools/perf/util/stat-shadow.c | 9 | ||||
| -rw-r--r-- | tools/perf/util/stat.h | 1 |
3 files changed, 10 insertions, 1 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 9b5089c5dffe..baa82078c148 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -1966,6 +1966,7 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused) argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands, (const char **) stat_usage, PARSE_OPT_STOP_AT_NON_OPTION); + perf_stat__init_shadow_stats(); if (csv_sep) { csv_output = true; diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c index 5e2d2e34e1bc..b33ffb2af2cf 100644 --- a/tools/perf/util/stat-shadow.c +++ b/tools/perf/util/stat-shadow.c @@ -2,6 +2,7 @@ #include "evsel.h" #include "stat.h" #include "color.h" +#include "pmu.h" enum { CTX_BIT_USER = 1 << 0, @@ -35,9 +36,15 @@ static struct stats runtime_dtlb_cache_stats[NUM_CTX][MAX_NR_CPUS]; static struct stats runtime_cycles_in_tx_stats[NUM_CTX][MAX_NR_CPUS]; static struct stats runtime_transaction_stats[NUM_CTX][MAX_NR_CPUS]; static struct stats runtime_elision_stats[NUM_CTX][MAX_NR_CPUS]; +static bool have_frontend_stalled; struct stats walltime_nsecs_stats; +void perf_stat__init_shadow_stats(void) +{ + have_frontend_stalled = pmu_have_event("cpu", "stalled-cycles-frontend"); +} + static int evsel_context(struct perf_evsel *evsel) { int ctx = 0; @@ -323,7 +330,7 @@ void perf_stat__print_shadow_stats(struct perf_evsel *evsel, print_metric(ctxp, NULL, "%7.2f ", "stalled cycles per insn", ratio); - } else { + } else if (have_frontend_stalled) { print_metric(ctxp, NULL, NULL, "stalled cycles per insn", 0); } diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h index f02af68adc04..0150e786ccc7 100644 --- a/tools/perf/util/stat.h +++ b/tools/perf/util/stat.h @@ -72,6 +72,7 @@ typedef void (*print_metric_t)(void *ctx, const char *color, const char *unit, const char *fmt, double val); typedef void (*new_line_t )(void *ctx); +void perf_stat__init_shadow_stats(void); void perf_stat__reset_shadow_stats(void); void perf_stat__update_shadow_stats(struct perf_evsel *counter, u64 *count, int cpu); |