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perf stat: Add JSON output option

Browse source 
CSV output is tricky to format and column layout changes are susceptible
to breaking parsers. New JSON-formatted output has variable names to
identify fields that are consistent and informative, making the output
parseable.

CSV output example:

  1.20,msec,task-clock:u,1204272,100.00,0.697,CPUs utilized
  0,,context-switches:u,1204272,100.00,0.000,/sec
  0,,cpu-migrations:u,1204272,100.00,0.000,/sec
  70,,page-faults:u,1204272,100.00,58.126,K/sec

JSON output example:

  {"counter-value" : "3805.723968", "unit" : "msec", "event" :
  "cpu-clock", "event-runtime" : 3805731510100.00, "pcnt-running"
  : 100.00, "metric-value" : 4.007571, "metric-unit" : "CPUs utilized"}
  {"counter-value" : "6166.000000", "unit" : "", "event" :
  "context-switches", "event-runtime" : 3805723045100.00, "pcnt-running"
  : 100.00, "metric-value" : 1.620191, "metric-unit" : "K/sec"}
  {"counter-value" : "466.000000", "unit" : "", "event" :
  "cpu-migrations", "event-runtime" : 3805727613100.00, "pcnt-running"
  : 100.00, "metric-value" : 122.447136, "metric-unit" : "/sec"}
  {"counter-value" : "208.000000", "unit" : "", "event" :
  "page-faults", "event-runtime" : 3805726799100.00, "pcnt-running"
  : 100.00, "metric-value" : 54.654516, "metric-unit" : "/sec"}

Also added documentation for JSON option.

There is some tidy up of CSV code including a potential memory over run
in the os.nfields set up. To facilitate this an AGGR_MAX value is added.

Committer notes:

Fixed up using PRIu64 to format u64 values, not %lu.

Committer testing:

  ⬢[acme@toolbox perf]$ perf stat -j sleep 1
  {"counter-value" : "0.731750", "unit" : "msec", "event" : "task-clock:u", "event-runtime" : 731750, "pcnt-running" : 100.00, "metric-value" : 0.000731, "metric-unit" : "CPUs utilized"}
  {"counter-value" : "0.000000", "unit" : "", "event" : "context-switches:u", "event-runtime" : 731750, "pcnt-running" : 100.00, "metric-value" : 0.000000, "metric-unit" : "/sec"}
  {"counter-value" : "0.000000", "unit" : "", "event" : "cpu-migrations:u", "event-runtime" : 731750, "pcnt-running" : 100.00, "metric-value" : 0.000000, "metric-unit" : "/sec"}
  {"counter-value" : "75.000000", "unit" : "", "event" : "page-faults:u", "event-runtime" : 731750, "pcnt-running" : 100.00, "metric-value" : 102.494021, "metric-unit" : "K/sec"}
  {"counter-value" : "578765.000000", "unit" : "", "event" : "cycles:u", "event-runtime" : 379366, "pcnt-running" : 49.00, "metric-value" : 0.790933, "metric-unit" : "GHz"}
  {"counter-value" : "1298.000000", "unit" : "", "event" : "stalled-cycles-frontend:u", "event-runtime" : 768020, "pcnt-running" : 100.00, "metric-value" : 0.224271, "metric-unit" : "frontend cycles idle"}
  {"counter-value" : "21984.000000", "unit" : "", "event" : "stalled-cycles-backend:u", "event-runtime" : 768020, "pcnt-running" : 100.00, "metric-value" : 3.798433, "metric-unit" : "backend cycles idle"}
  {"counter-value" : "468197.000000", "unit" : "", "event" : "instructions:u", "event-runtime" : 768020, "pcnt-running" : 100.00, "metric-value" : 0.808959, "metric-unit" : "insn per cycle"}
  {"metric-value" : 0.046955, "metric-unit" : "stalled cycles per insn"}
  {"counter-value" : "103335.000000", "unit" : "", "event" : "branches:u", "event-runtime" : 768020, "pcnt-running" : 100.00, "metric-value" : 141.216262, "metric-unit" : "M/sec"}
  {"counter-value" : "2381.000000", "unit" : "", "event" : "branch-misses:u", "event-runtime" : 388654, "pcnt-running" : 50.00, "metric-value" : 2.304156, "metric-unit" : "of all branches"}
  ⬢[acme@toolbox perf]$

Signed-off-by: Claire Jensen <cjense@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alyssa Ross <hi@alyssa.is>
Cc: Claire Jensen <clairej735@gmail.com>
Cc: Florian Fischer <florian.fischer@muhq.space>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Like Xu <likexu@tencent.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Link: https://lore.kernel.org/r/20220805200105.2020995-2-irogers@google.com
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Claire Jensen 2022-08-05 13:01:04 -07:00 committed by Arnaldo Carvalho de Melo
parent eb555cb5b7
commit df936cadfb
5 changed files with 310 additions and 109 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

21
tools/perf/Documentation/perf-stat.txt
View file

@ -570,6 +570,27 @@ Additional metrics may be printed with all earlier fields being empty.
include::intel-hybrid.txt[]
JSON FORMAT
-----------
With -j, perf stat is able to print out a JSON format output
that can be used for parsing.
- timestamp : optional usec time stamp in fractions of second (with -I)
- optional aggregate options:
- core : core identifier (with --per-core)
- die : die identifier (with --per-die)
- socket : socket identifier (with --per-socket)
- node : node identifier (with --per-node)
- thread : thread identifier (with --per-thread)
- counter-value : counter value
- unit : unit of the counter value or empty
- event : event name
- variance : optional variance if multiple values are collected (with -r)
- runtime : run time of counter
- metric-value : optional metric value
- metric-unit : optional unit of metric
SEE ALSO
--------
linkperf:perf-top[1], linkperf:perf-list[1]

6
tools/perf/builtin-stat.c
View file

@ -1250,6 +1250,8 @@ static struct option stat_options[] = {
"Merge identical named hybrid events"),
OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator",
"print counts with custom separator"),
OPT_BOOLEAN('j', "json-output", &stat_config.json_output,
"print counts in JSON format"),
OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
"monitor event in cgroup name only", parse_stat_cgroups),
OPT_STRING(0, "for-each-cgroup", &stat_config.cgroup_list, "name",
@ -1436,6 +1438,7 @@ static aggr_cpu_id_get_t aggr_mode__get_aggr(enum aggr_mode aggr_mode)
case AGGR_GLOBAL:
case AGGR_THREAD:
case AGGR_UNSET:
case AGGR_MAX:
default:
return NULL;
}
@ -1460,6 +1463,7 @@ static aggr_get_id_t aggr_mode__get_id(enum aggr_mode aggr_mode)
case AGGR_GLOBAL:
case AGGR_THREAD:
case AGGR_UNSET:
case AGGR_MAX:
default:
return NULL;
}
@ -1610,6 +1614,7 @@ static aggr_cpu_id_get_t aggr_mode__get_aggr_file(enum aggr_mode aggr_mode)
case AGGR_GLOBAL:
case AGGR_THREAD:
case AGGR_UNSET:
case AGGR_MAX:
default:
return NULL;
}
@ -1630,6 +1635,7 @@ static aggr_get_id_t aggr_mode__get_id_file(enum aggr_mode aggr_mode)
case AGGR_GLOBAL:
case AGGR_THREAD:
case AGGR_UNSET:
case AGGR_MAX:
default:
return NULL;
}

389
tools/perf/util/stat-display.c
View file

@ -28,15 +28,21 @@
static void print_running(struct perf_stat_config *config,
u64 run, u64 ena)
{
if (config->csv_output) {
fprintf(config->output, "%s%" PRIu64 "%s%.2f",
config->csv_sep,
run,
config->csv_sep,
ena ? 100.0 * run / ena : 100.0);
} else if (run != ena) {
double enabled_percent = 100;
if (run != ena)
enabled_percent = 100 * run / ena;
if (config->json_output)
fprintf(config->output,
"\"event-runtime\" : %" PRIu64 ", \"pcnt-running\" : %.2f, ",
run, enabled_percent);
else if (config->csv_output)
fprintf(config->output,
"%s%" PRIu64 "%s%.2f", config->csv_sep,
run, config->csv_sep, enabled_percent);
else if (run != ena)
fprintf(config->output, " (%.2f%%)", 100.0 * run / ena);
}
}
static void print_noise_pct(struct perf_stat_config *config,
@ -44,7 +50,9 @@ static void print_noise_pct(struct perf_stat_config *config,
{
double pct = rel_stddev_stats(total, avg);
if (config->csv_output)
if (config->json_output)
fprintf(config->output, "\"variance\" : %.2f, ", pct);
else if (config->csv_output)
fprintf(config->output, "%s%.2f%%", config->csv_sep, pct);
else if (pct)
fprintf(config->output, " ( +-%6.2f%% )", pct);
@ -66,7 +74,11 @@ static void print_cgroup(struct perf_stat_config *config, struct evsel *evsel)
{
if (nr_cgroups) {
const char *cgrp_name = evsel->cgrp ? evsel->cgrp->name : "";
fprintf(config->output, "%s%s", config->csv_sep, cgrp_name);
if (config->json_output)
fprintf(config->output, "\"cgroup\" : \"%s\", ", cgrp_name);
else
fprintf(config->output, "%s%s", config->csv_sep, cgrp_name);
}
}
@ -74,69 +86,123 @@ static void print_cgroup(struct perf_stat_config *config, struct evsel *evsel)
static void aggr_printout(struct perf_stat_config *config,
struct evsel *evsel, struct aggr_cpu_id id, int nr)
{
if (config->json_output && !config->interval)
fprintf(config->output, "{");
switch (config->aggr_mode) {
case AGGR_CORE:
fprintf(config->output, "S%d-D%d-C%*d%s%*d%s",
id.socket,
id.die,
config->csv_output ? 0 : -8,
id.core,
config->csv_sep,
config->csv_output ? 0 : 4,
nr,
config->csv_sep);
break;
case AGGR_DIE:
fprintf(config->output, "S%d-D%*d%s%*d%s",
id.socket,
config->csv_output ? 0 : -8,
id.die,
config->csv_sep,
config->csv_output ? 0 : 4,
nr,
config->csv_sep);
break;
case AGGR_SOCKET:
fprintf(config->output, "S%*d%s%*d%s",
config->csv_output ? 0 : -5,
id.socket,
config->csv_sep,
config->csv_output ? 0 : 4,
nr,
config->csv_sep);
break;
case AGGR_NODE:
fprintf(config->output, "N%*d%s%*d%s",
config->csv_output ? 0 : -5,
id.node,
config->csv_sep,
config->csv_output ? 0 : 4,
nr,
config->csv_sep);
break;
case AGGR_NONE:
if (evsel->percore && !config->percore_show_thread) {
fprintf(config->output, "S%d-D%d-C%*d%s",
if (config->json_output) {
fprintf(config->output,
"\"core\" : \"S%d-D%d-C%d\", \"aggregate-number\" : %d, ",
id.socket,
id.die,
config->csv_output ? 0 : -3,
id.core, config->csv_sep);
} else if (id.cpu.cpu > -1) {
fprintf(config->output, "CPU%*d%s",
config->csv_output ? 0 : -7,
id.cpu.cpu, config->csv_sep);
id.core,
nr);
} else {
fprintf(config->output, "S%d-D%d-C%*d%s%*d%s",
id.socket,
id.die,
config->csv_output ? 0 : -8,
id.core,
config->csv_sep,
config->csv_output ? 0 : 4,
nr,
config->csv_sep);
}
break;
case AGGR_DIE:
if (config->json_output) {
fprintf(config->output,
"\"die\" : \"S%d-D%d\", \"aggregate-number\" : %d, ",
id.socket,
id.die,
nr);
} else {
fprintf(config->output, "S%d-D%*d%s%*d%s",
id.socket,
config->csv_output ? 0 : -8,
id.die,
config->csv_sep,
config->csv_output ? 0 : 4,
nr,
config->csv_sep);
}
break;
case AGGR_SOCKET:
if (config->json_output) {
fprintf(config->output,
"\"socket\" : \"S%d\", \"aggregate-number\" : %d, ",
id.socket,
nr);
} else {
fprintf(config->output, "S%*d%s%*d%s",
config->csv_output ? 0 : -5,
id.socket,
config->csv_sep,
config->csv_output ? 0 : 4,
nr,
config->csv_sep);
}
break;
case AGGR_NODE:
if (config->json_output) {
fprintf(config->output, "\"node\" : \"N%d\", \"aggregate-number\" : %d, ",
id.node,
nr);
} else {
fprintf(config->output, "N%*d%s%*d%s",
config->csv_output ? 0 : -5,
id.node,
config->csv_sep,
config->csv_output ? 0 : 4,
nr,
config->csv_sep);
}
break;
case AGGR_NONE:
if (config->json_output) {
if (evsel->percore && !config->percore_show_thread) {
fprintf(config->output, "\"core\" : \"S%d-D%d-C%d\"",
id.socket,
id.die,
id.core);
} else if (id.core > -1) {
fprintf(config->output, "\"cpu\" : \"%d\", ",
id.cpu.cpu);
}
} else {
if (evsel->percore && !config->percore_show_thread) {
fprintf(config->output, "S%d-D%d-C%*d%s",
id.socket,
id.die,
config->csv_output ? 0 : -3,
id.core, config->csv_sep);
} else if (id.core > -1) {
fprintf(config->output, "CPU%*d%s",
config->csv_output ? 0 : -7,
id.cpu.cpu, config->csv_sep);
}
}
break;
case AGGR_THREAD:
fprintf(config->output, "%*s-%*d%s",
config->csv_output ? 0 : 16,
perf_thread_map__comm(evsel->core.threads, id.thread),
config->csv_output ? 0 : -8,
perf_thread_map__pid(evsel->core.threads, id.thread),
config->csv_sep);
if (config->json_output) {
fprintf(config->output, "\"thread\" : \"%s-%d\", ",
perf_thread_map__comm(evsel->core.threads, id.thread),
perf_thread_map__pid(evsel->core.threads, id.thread));
} else {
fprintf(config->output, "%*s-%*d%s",
config->csv_output ? 0 : 16,
perf_thread_map__comm(evsel->core.threads, id.thread),
config->csv_output ? 0 : -8,
perf_thread_map__pid(evsel->core.threads, id.thread),
config->csv_sep);
}
break;
case AGGR_GLOBAL:
case AGGR_UNSET:
case AGGR_MAX:
default:
break;
}
@ -234,6 +300,31 @@ static void print_metric_csv(struct perf_stat_config *config __maybe_unused,
fprintf(out, "%s%s%s%s", config->csv_sep, vals, config->csv_sep, skip_spaces(unit));
}
static void print_metric_json(struct perf_stat_config *config __maybe_unused,
void *ctx,
const char *color __maybe_unused,
const char *fmt __maybe_unused,
const char *unit, double val)
{
struct outstate *os = ctx;
FILE *out = os->fh;
fprintf(out, "\"metric-value\" : %f, ", val);
fprintf(out, "\"metric-unit\" : \"%s\"", unit);
if (!config->metric_only)
fprintf(out, "}");
}
static void new_line_json(struct perf_stat_config *config, void *ctx)
{
struct outstate *os = ctx;
fputc('\n', os->fh);
if (os->prefix)
fprintf(os->fh, "%s", os->prefix);
aggr_printout(config, os->evsel, os->id, os->nr);
}
/* Filter out some columns that don't work well in metrics only mode */
static bool valid_only_metric(const char *unit)
@ -300,6 +391,27 @@ static void print_metric_only_csv(struct perf_stat_config *config __maybe_unused
fprintf(out, "%s%s", vals, config->csv_sep);
}
static void print_metric_only_json(struct perf_stat_config *config __maybe_unused,
void *ctx, const char *color __maybe_unused,
const char *fmt,
const char *unit, double val)
{
struct outstate *os = ctx;
FILE *out = os->fh;
char buf[64], *vals, *ends;
char tbuf[1024];
if (!valid_only_metric(unit))
return;
unit = fixunit(tbuf, os->evsel, unit);
snprintf(buf, sizeof(buf), fmt, val);
ends = vals = skip_spaces(buf);
while (isdigit(*ends) || *ends == '.')
ends++;
*ends = 0;
fprintf(out, "{\"metric-value\" : \"%s\"}", vals);
}
static void new_line_metric(struct perf_stat_config *config __maybe_unused,
void *ctx __maybe_unused)
{
@ -318,10 +430,13 @@ static void print_metric_header(struct perf_stat_config *config,
os->evsel->priv != os->evsel->evlist->selected->priv)
return;
if (!valid_only_metric(unit))
if (!valid_only_metric(unit) && !config->json_output)
return;
unit = fixunit(tbuf, os->evsel, unit);
if (config->csv_output)
if (config->json_output)
fprintf(os->fh, "\"unit\" : \"%s\"", unit);
else if (config->csv_output)
fprintf(os->fh, "%s%s", unit, config->csv_sep);
else
fprintf(os->fh, "%*s ", config->metric_only_len, unit);
@ -367,14 +482,27 @@ static void abs_printout(struct perf_stat_config *config,
aggr_printout(config, evsel, id, nr);
fprintf(output, fmt, avg, config->csv_sep);
if (config->json_output)
fprintf(output, "\"counter-value\" : \"%f\", ", avg);
else
fprintf(output, fmt, avg, config->csv_sep);
if (evsel->unit)
fprintf(output, "%-*s%s",
config->csv_output ? 0 : config->unit_width,
evsel->unit, config->csv_sep);
if (config->json_output) {
if (evsel->unit) {
fprintf(output, "\"unit\" : \"%s\", ",
evsel->unit);
}
} else {
if (evsel->unit)
fprintf(output, "%-*s%s",
config->csv_output ? 0 : config->unit_width,
evsel->unit, config->csv_sep);
}
fprintf(output, "%-*s", config->csv_output ? 0 : 32, evsel__name(evsel));
if (config->json_output)
fprintf(output, "\"event\" : \"%s\", ", evsel__name(evsel));
else
fprintf(output, "%-*s", config->csv_output ? 0 : 32, evsel__name(evsel));
print_cgroup(config, evsel);
}
@ -416,34 +544,30 @@ static void printout(struct perf_stat_config *config, struct aggr_cpu_id id, int
.nr = nr,
.evsel = counter,
};
print_metric_t pm = print_metric_std;
print_metric_t pm;
new_line_t nl;
if (config->metric_only) {
nl = new_line_metric;
if (config->csv_output)
pm = print_metric_only_csv;
else
pm = print_metric_only;
} else
nl = new_line_std;
if (config->csv_output && !config->metric_only) {
static int aggr_fields[] = {
[AGGR_GLOBAL] = 0,
[AGGR_THREAD] = 1,
if (config->csv_output) {
static const int aggr_fields[AGGR_MAX] = {
[AGGR_NONE] = 1,
[AGGR_GLOBAL] = 0,
[AGGR_SOCKET] = 2,
[AGGR_DIE] = 2,
[AGGR_CORE] = 2,
[AGGR_THREAD] = 1,
[AGGR_UNSET] = 0,
[AGGR_NODE] = 0,
};
pm = print_metric_csv;
nl = new_line_csv;
os.nfields = 3;
os.nfields += aggr_fields[config->aggr_mode];
if (counter->cgrp)
os.nfields++;
pm = config->metric_only ? print_metric_only_csv : print_metric_csv;
nl = config->metric_only ? new_line_metric : new_line_csv;
os.nfields = 3 + aggr_fields[config->aggr_mode] + (counter->cgrp ? 1 : 0);
} else if (config->json_output) {
pm = config->metric_only ? print_metric_only_json : print_metric_json;
nl = config->metric_only ? new_line_metric : new_line_json;
} else {
pm = config->metric_only ? print_metric_only : print_metric_std;
nl = config->metric_only ? new_line_metric : new_line_std;
}
if (!config->no_csv_summary && config->csv_output &&
@ -458,10 +582,15 @@ static void printout(struct perf_stat_config *config, struct aggr_cpu_id id, int
}
aggr_printout(config, counter, id, nr);
fprintf(config->output, "%*s%s",
config->csv_output ? 0 : 18,
counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
config->csv_sep);
if (config->json_output) {
fprintf(config->output, "\"counter-value\" : \"%s\", ",
counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED);
} else {
fprintf(config->output, "%*s%s",
config->csv_output ? 0 : 18,
counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
config->csv_sep);
}
if (counter->supported) {
if (!evlist__has_hybrid(counter->evlist)) {
@ -471,21 +600,32 @@ static void printout(struct perf_stat_config *config, struct aggr_cpu_id id, int
}
}
fprintf(config->output, "%-*s%s",
config->csv_output ? 0 : config->unit_width,
counter->unit, config->csv_sep);
if (config->json_output) {
fprintf(config->output, "\"unit\" : \"%s\", ", counter->unit);
} else {
fprintf(config->output, "%-*s%s",
config->csv_output ? 0 : config->unit_width,
counter->unit, config->csv_sep);
}
fprintf(config->output, "%*s",
config->csv_output ? 0 : -25, evsel__name(counter));
if (config->json_output) {
fprintf(config->output, "\"event\" : \"%s\", ",
evsel__name(counter));
} else {
fprintf(config->output, "%*s",
config->csv_output ? 0 : -25, evsel__name(counter));
}
print_cgroup(config, counter);
if (!config->csv_output)
if (!config->csv_output && !config->json_output)
pm(config, &os, NULL, NULL, "", 0);
print_noise(config, counter, noise);
print_running(config, run, ena);
if (config->csv_output)
pm(config, &os, NULL, NULL, "", 0);
else if (config->json_output)
pm(config, &os, NULL, NULL, "", 0);
return;
}
@ -500,12 +640,15 @@ static void printout(struct perf_stat_config *config, struct aggr_cpu_id id, int
if (config->csv_output && !config->metric_only) {
print_noise(config, counter, noise);
print_running(config, run, ena);
} else if (config->json_output && !config->metric_only) {
print_noise(config, counter, noise);
print_running(config, run, ena);
}
perf_stat__print_shadow_stats(config, counter, uval,
first_shadow_cpu_map_idx(config, counter, &id),
&out, &config->metric_events, st);
if (!config->csv_output && !config->metric_only) {
if (!config->csv_output && !config->metric_only && !config->json_output) {
print_noise(config, counter, noise);
print_running(config, run, ena);
}
@ -1004,8 +1147,12 @@ static void print_metric_headers(struct perf_stat_config *config,
struct outstate os = {
.fh = config->output
};
bool first = true;
if (prefix)
if (config->json_output && !config->interval)
fprintf(config->output, "{");
if (prefix && !config->json_output)
fprintf(config->output, "%s", prefix);
if (!config->csv_output && !no_indent)
@ -1025,6 +1172,9 @@ static void print_metric_headers(struct perf_stat_config *config,
os.evsel = counter;
out.ctx = &os;
out.print_metric = print_metric_header;
if (!first && config->json_output)
fprintf(config->output, ", ");
first = false;
out.new_line = new_line_metric;
out.force_header = true;
perf_stat__print_shadow_stats(config, counter, 0,
@ -1033,6 +1183,8 @@ static void print_metric_headers(struct perf_stat_config *config,
&config->metric_events,
&rt_stat);
}
if (config->json_output)
fprintf(config->output, "}");
fputc('\n', config->output);
}
@ -1048,10 +1200,18 @@ static void print_interval(struct perf_stat_config *config,
if (config->interval_clear)
puts(CONSOLE_CLEAR);
if (!config->iostat_run)
sprintf(prefix, "%6lu.%09lu%s", (unsigned long) ts->tv_sec, ts->tv_nsec, config->csv_sep);
if (!config->iostat_run && !config->json_output)
sprintf(prefix, "%6lu.%09lu%s", (unsigned long) ts->tv_sec,
ts->tv_nsec, config->csv_sep);
if (!config->iostat_run && config->json_output && !config->metric_only)
sprintf(prefix, "{\"interval\" : %lu.%09lu, ", (unsigned long)
ts->tv_sec, ts->tv_nsec);
if (!config->iostat_run && config->json_output && config->metric_only)
sprintf(prefix, "{\"interval\" : %lu.%09lu}", (unsigned long)
ts->tv_sec, ts->tv_nsec);
if ((num_print_interval == 0 && !config->csv_output) || config->interval_clear) {
if ((num_print_interval == 0 && !config->csv_output && !config->json_output)
|| config->interval_clear) {
switch (config->aggr_mode) {
case AGGR_NODE:
fprintf(output, "# time node cpus");
@ -1091,12 +1251,19 @@ static void print_interval(struct perf_stat_config *config,
fprintf(output, " counts %*s events\n", unit_width, "unit");
}
case AGGR_UNSET:
case AGGR_MAX:
break;
}
}
if ((num_print_interval == 0 || config->interval_clear) && metric_only)
if ((num_print_interval == 0 || config->interval_clear)
&& metric_only && !config->json_output)
print_metric_headers(config, evlist, " ", true);
if ((num_print_interval == 0 || config->interval_clear)
&& metric_only && config->json_output) {
fprintf(output, "{");
print_metric_headers(config, evlist, " ", true);
}
if (++num_print_interval == 25)
num_print_interval = 0;
}
@ -1110,7 +1277,7 @@ static void print_header(struct perf_stat_config *config,
fflush(stdout);
if (!config->csv_output) {
if (!config->csv_output && !config->json_output) {
fprintf(output, "\n");
fprintf(output, " Performance counter stats for ");
if (_target->bpf_str)
@ -1303,6 +1470,9 @@ void evlist__print_counters(struct evlist *evlist, struct perf_stat_config *conf
num_print_iv = 0;
if (config->aggr_mode == AGGR_GLOBAL && prefix && !config->iostat_run)
fprintf(config->output, "%s", prefix);
if (config->json_output && !config->metric_only)
fprintf(config->output, "}");
}
switch (config->aggr_mode) {
@ -1341,12 +1511,13 @@ void evlist__print_counters(struct evlist *evlist, struct perf_stat_config *conf
}
}
break;
case AGGR_MAX:
case AGGR_UNSET:
default:
break;
}
if (!interval && !config->csv_output)
if (!interval && !config->csv_output && !config->json_output)
print_footer(config);
fflush(config->output);

1
tools/perf/util/stat.c
View file

@ -401,6 +401,7 @@ process_counter_values(struct perf_stat_config *config, struct evsel *evsel,
aggr->ena += count->ena;
aggr->run += count->run;
case AGGR_UNSET:
case AGGR_MAX:
default:
break;
}

2
tools/perf/util/stat.h
View file

@ -57,6 +57,7 @@ enum aggr_mode {
AGGR_THREAD,
AGGR_UNSET,
AGGR_NODE,
AGGR_MAX
};
enum {
@ -121,6 +122,7 @@ struct perf_stat_config {
bool no_inherit;
bool identifier;
bool csv_output;
bool json_output;
bool interval_clear;
bool metric_only;
bool null_run;