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Date: Mon, 7 Sep 2015 14:14:41 +0200
From: Jiri Olsa <jolsa@...hat.com>
To: Andi Kleen <andi@...stfloor.org>
Cc: acme@...nel.org, jolsa@...nel.org, linux-kernel@...r.kernel.org,
Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 2/6] perf, tools, stat: Abstract stat metrics printing
On Fri, Sep 04, 2015 at 03:45:13PM -0700, Andi Kleen wrote:
> From: Andi Kleen <ak@...ux.intel.com>
>
> Abstract the printing of shadow metrics. Instead of every
> metric calling fprintf directly and taking care of indentation,
> use two call backs: one to print metrics and another to
> start a new line.
>
> This will allow adding metrics to CSV mode and also
> using them for other purposes.
>
> The computation of padding is now done in the central
> callback, instead of every metric doing it manually.
> This makes it easier to add new metrics.
>
> v2: Refactor functions, printout now does more. Move
> shadow printing. Improve fallback callbacks. Don't
> use void * callback data.
> v3: Remove unnecessary hunk. Add typedef for new_line
> Signed-off-by: Andi Kleen <ak@...ux.intel.com>
before this patch:
[jolsa@...va perf]$ ./perf stat -e cycles -I 1000 -x, yes > /dev/null
28.002841829,2907511555,,cycles,1000612137,100.00
29.002944242,2893835898,,cycles,1000615661,100.00
30.003043253,2910405767,,cycles,1000618513,100.00
31.003140585,2909645607,,cycles,1000621442,100.00
32.003244286,2910397988,,cycles,1000624150,100.00
33.003347139,2908927486,,cycles,1000626890,100.00
^C 33.581210913,1677490047,,cycles,988203059,100.00
33.581315820,157136,,cycles,959970233,100.00
yes: Interrupt
after this patch:
[jolsa@...va perf]$ ./perf stat -e cycles -I 1000 -x, yes > /dev/null
1.000101739,3074999967,,cycles # Ghz ,1000247731,100.00
2.000223351,3019361712,,cycles # Ghz ,999945890,100.00
3.000327235,3012966500,,cycles # Ghz ,999805678,100.00
4.000430983,3009829158,,cycles # Ghz ,999871044,100.00
I think the reason is that this patch does too much and needs
to be separated to smaller changes, like:
- introduce the print_metrics interface for perf_stat__print_shadow_stats
- introduce printout function
- introduce support for printing metrics in csv in interval mode
- and enable it
or any other way you find feasible *easy to review*.. I cannot ack it at this state
jirka
> ---
> tools/perf/builtin-stat.c | 100 ++++++++++++++------
> tools/perf/util/stat-shadow.c | 212 +++++++++++++++++++++++-------------------
> tools/perf/util/stat.h | 15 ++-
> 3 files changed, 197 insertions(+), 130 deletions(-)
>
SNIP
> @@ -544,12 +581,32 @@ static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
>
> if (evsel->cgrp)
> fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
> +}
>
> - if (csv_output || stat_config.interval)
> - return;
now you printout metrics for interval/csv
> +static void printout(int id, int nr, struct perf_evsel *counter, double uval)
> +{
> + struct outstate os = { .fh = stat_config.output };
> + struct perf_stat_output_ctx out;
> + print_metric_t pm = print_metric_std;
> + void (*nl)(void *);
> +
> + if (stat_config.aggr_mode == AGGR_NONE)
> + nl = new_line_no_aggr_std;
> + else
> + nl = new_line_std;
>
> - perf_stat__print_shadow_stats(output, evsel, avg, cpu,
> - stat_config.aggr_mode);
> + if (nsec_counter(counter))
> + nsec_printout(id, nr, counter, uval);
> + else
> + abs_printout(id, nr, counter, uval);
> +
> + out.print_metric = pm;
> + out.new_line = nl;
> + out.ctx = &os;
> + perf_stat__print_shadow_stats(counter, uval,
> + stat_config.aggr_mode == AGGR_GLOBAL ? 0 :
> + cpu_map__id_to_cpu(id),
> + &out);
> }
>
> static void print_aggr(char *prefix)
> @@ -605,12 +662,7 @@ static void print_aggr(char *prefix)
> continue;
> }
> uval = val * counter->scale;
> -
> - if (nsec_counter(counter))
> - nsec_printout(id, nr, counter, uval);
> - else
> - abs_printout(id, nr, counter, uval);
> -
> + printout(id, nr, counter, uval);
> if (!csv_output)
> print_noise(counter, 1.0);
>
> @@ -641,11 +693,7 @@ static void print_aggr_thread(struct perf_evsel *counter, char *prefix)
> fprintf(output, "%s", prefix);
>
> uval = val * counter->scale;
> -
> - if (nsec_counter(counter))
> - nsec_printout(thread, 0, counter, uval);
> - else
> - abs_printout(thread, 0, counter, uval);
> + printout(thread, 0, counter, uval);
>
> if (!csv_output)
> print_noise(counter, 1.0);
> @@ -695,11 +743,7 @@ static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
> }
>
> uval = avg * counter->scale;
> -
> - if (nsec_counter(counter))
> - nsec_printout(-1, 0, counter, uval);
> - else
> - abs_printout(-1, 0, counter, uval);
> + printout(-1, 0, counter, uval);
>
> print_noise(counter, avg);
>
> @@ -752,15 +796,9 @@ static void print_counter(struct perf_evsel *counter, char *prefix)
> }
>
> uval = val * counter->scale;
> -
> - if (nsec_counter(counter))
> - nsec_printout(cpu, 0, counter, uval);
> - else
> - abs_printout(cpu, 0, counter, uval);
> -
> + printout(cpu, 0, counter, uval);
> if (!csv_output)
> print_noise(counter, 1.0);
> - print_running(run, ena);
>
> fputc('\n', output);
> }
> diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
> index 625ab3b..d7d27b5 100644
> --- a/tools/perf/util/stat-shadow.c
> +++ b/tools/perf/util/stat-shadow.c
> @@ -137,9 +137,10 @@ static const char *get_ratio_color(enum grc_type type, double ratio)
> return color;
> }
>
> -static void print_stalled_cycles_frontend(FILE *out, int cpu,
> +static void print_stalled_cycles_frontend(int cpu,
> struct perf_evsel *evsel
> - __maybe_unused, double avg)
> + __maybe_unused, double avg,
> + struct perf_stat_output_ctx *out)
> {
> double total, ratio = 0.0;
> const char *color;
> @@ -152,14 +153,13 @@ static void print_stalled_cycles_frontend(FILE *out, int cpu,
>
> color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
>
> - fprintf(out, " # ");
> - color_fprintf(out, color, "%6.2f%%", ratio);
> - fprintf(out, " frontend cycles idle ");
> + out->print_metric(out->ctx, color, "%7.2f%%", "frontend cycles idle", ratio);
> }
>
> -static void print_stalled_cycles_backend(FILE *out, int cpu,
> +static void print_stalled_cycles_backend(int cpu,
> struct perf_evsel *evsel
> - __maybe_unused, double avg)
> + __maybe_unused, double avg,
> + struct perf_stat_output_ctx *out)
> {
> double total, ratio = 0.0;
> const char *color;
> @@ -172,14 +172,13 @@ static void print_stalled_cycles_backend(FILE *out, int cpu,
>
> color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
>
> - fprintf(out, " # ");
> - color_fprintf(out, color, "%6.2f%%", ratio);
> - fprintf(out, " backend cycles idle ");
> + out->print_metric(out->ctx, color, "%6.2f%%", "backend cycles idle", ratio);
> }
>
> -static void print_branch_misses(FILE *out, int cpu,
> +static void print_branch_misses(int cpu,
> struct perf_evsel *evsel __maybe_unused,
> - double avg)
> + double avg,
> + struct perf_stat_output_ctx *out)
> {
> double total, ratio = 0.0;
> const char *color;
> @@ -192,14 +191,13 @@ static void print_branch_misses(FILE *out, int cpu,
>
> color = get_ratio_color(GRC_CACHE_MISSES, ratio);
>
> - fprintf(out, " # ");
> - color_fprintf(out, color, "%6.2f%%", ratio);
> - fprintf(out, " of all branches ");
> + out->print_metric(out->ctx, color, "%7.2f%%", "of all branches", ratio);
> }
>
> -static void print_l1_dcache_misses(FILE *out, int cpu,
> +static void print_l1_dcache_misses(int cpu,
> struct perf_evsel *evsel __maybe_unused,
> - double avg)
> + double avg,
> + struct perf_stat_output_ctx *out)
> {
> double total, ratio = 0.0;
> const char *color;
> @@ -212,14 +210,13 @@ static void print_l1_dcache_misses(FILE *out, int cpu,
>
> color = get_ratio_color(GRC_CACHE_MISSES, ratio);
>
> - fprintf(out, " # ");
> - color_fprintf(out, color, "%6.2f%%", ratio);
> - fprintf(out, " of all L1-dcache hits ");
> + out->print_metric(out->ctx, color, "%7.2f%%", "of all L1-dcache hits", ratio);
> }
>
> -static void print_l1_icache_misses(FILE *out, int cpu,
> +static void print_l1_icache_misses(int cpu,
> struct perf_evsel *evsel __maybe_unused,
> - double avg)
> + double avg,
> + struct perf_stat_output_ctx *out)
> {
> double total, ratio = 0.0;
> const char *color;
> @@ -231,15 +228,13 @@ static void print_l1_icache_misses(FILE *out, int cpu,
> ratio = avg / total * 100.0;
>
> color = get_ratio_color(GRC_CACHE_MISSES, ratio);
> -
> - fprintf(out, " # ");
> - color_fprintf(out, color, "%6.2f%%", ratio);
> - fprintf(out, " of all L1-icache hits ");
> + out->print_metric(out->ctx, color, "%7.2f%%", "of all L1-icache hits", ratio);
> }
>
> -static void print_dtlb_cache_misses(FILE *out, int cpu,
> +static void print_dtlb_cache_misses(int cpu,
> struct perf_evsel *evsel __maybe_unused,
> - double avg)
> + double avg,
> + struct perf_stat_output_ctx *out)
> {
> double total, ratio = 0.0;
> const char *color;
> @@ -251,15 +246,13 @@ static void print_dtlb_cache_misses(FILE *out, int cpu,
> ratio = avg / total * 100.0;
>
> color = get_ratio_color(GRC_CACHE_MISSES, ratio);
> -
> - fprintf(out, " # ");
> - color_fprintf(out, color, "%6.2f%%", ratio);
> - fprintf(out, " of all dTLB cache hits ");
> + out->print_metric(out->ctx, color, "%7.2f%%", "of all dTLB cache hits", ratio);
> }
>
> -static void print_itlb_cache_misses(FILE *out, int cpu,
> +static void print_itlb_cache_misses(int cpu,
> struct perf_evsel *evsel __maybe_unused,
> - double avg)
> + double avg,
> + struct perf_stat_output_ctx *out)
> {
> double total, ratio = 0.0;
> const char *color;
> @@ -271,15 +264,13 @@ static void print_itlb_cache_misses(FILE *out, int cpu,
> ratio = avg / total * 100.0;
>
> color = get_ratio_color(GRC_CACHE_MISSES, ratio);
> -
> - fprintf(out, " # ");
> - color_fprintf(out, color, "%6.2f%%", ratio);
> - fprintf(out, " of all iTLB cache hits ");
> + out->print_metric(out->ctx, color, "%7.2f%%", "of all iTLB cache hits", ratio);
> }
>
> -static void print_ll_cache_misses(FILE *out, int cpu,
> +static void print_ll_cache_misses(int cpu,
> struct perf_evsel *evsel __maybe_unused,
> - double avg)
> + double avg,
> + struct perf_stat_output_ctx *out)
> {
> double total, ratio = 0.0;
> const char *color;
> @@ -291,15 +282,15 @@ static void print_ll_cache_misses(FILE *out, int cpu,
> ratio = avg / total * 100.0;
>
> color = get_ratio_color(GRC_CACHE_MISSES, ratio);
> -
> - fprintf(out, " # ");
> - color_fprintf(out, color, "%6.2f%%", ratio);
> - fprintf(out, " of all LL-cache hits ");
> + out->print_metric(out->ctx, color, "%7.2f%%", "of all LL-cache hits", ratio);
> }
>
> -void perf_stat__print_shadow_stats(FILE *out, struct perf_evsel *evsel,
> - double avg, int cpu, enum aggr_mode aggr)
> +void perf_stat__print_shadow_stats(struct perf_evsel *evsel,
> + double avg, int cpu,
> + struct perf_stat_output_ctx *out)
> {
> + void *ctxp = out->ctx;
> + print_metric_t print_metric = out->print_metric;
> double total, ratio = 0.0, total2;
> int ctx = evsel_context(evsel);
>
> @@ -307,117 +298,144 @@ void perf_stat__print_shadow_stats(FILE *out, struct perf_evsel *evsel,
> total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
> if (total) {
> ratio = avg / total;
> - fprintf(out, " # %5.2f insns per cycle ", ratio);
> + print_metric(ctxp, NULL, "%7.2f ",
> + "insn per cycle", ratio);
> } else {
> - fprintf(out, " ");
> + print_metric(ctxp, NULL, NULL, "insn per cycle", 0);
> }
> total = avg_stats(&runtime_stalled_cycles_front_stats[ctx][cpu]);
> total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[ctx][cpu]));
>
> if (total && avg) {
> ratio = total / avg;
> - fprintf(out, "\n");
> - if (aggr == AGGR_NONE)
> - fprintf(out, " ");
> - fprintf(out, " # %5.2f stalled cycles per insn", ratio);
> + out->new_line(ctxp);
> + print_metric(ctxp, NULL, "%7.2f ",
> + "stalled cycles per insn",
> + ratio);
> + } else {
> + print_metric(ctxp, NULL, NULL,
> + "stalled cycles per insn", 0);
> }
> -
> - } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
> - runtime_branches_stats[ctx][cpu].n != 0) {
> - print_branch_misses(out, cpu, evsel, avg);
> + } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES)) {
> + if (runtime_branches_stats[ctx][cpu].n != 0)
> + print_branch_misses(cpu, evsel, avg, out);
> + else
> + print_metric(ctxp, NULL, NULL, "of all branches", 0);
> } 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[ctx][cpu].n != 0) {
> - print_l1_dcache_misses(out, cpu, evsel, avg);
> + ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) {
> + if (runtime_l1_dcache_stats[ctx][cpu].n != 0)
> + print_l1_dcache_misses(cpu, evsel, avg, out);
> + else
> + print_metric(ctxp, NULL, NULL, "of all L1-dcache hits", 0);
> } 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[ctx][cpu].n != 0) {
> - print_l1_icache_misses(out, cpu, evsel, avg);
> + ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) {
> + if (runtime_l1_icache_stats[ctx][cpu].n != 0)
> + print_l1_icache_misses(cpu, evsel, avg, out);
> + else
> + print_metric(ctxp, NULL, NULL, "of all L1-icache hits", 0);
> } 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[ctx][cpu].n != 0) {
> - print_dtlb_cache_misses(out, cpu, evsel, avg);
> + ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) {
> + if (runtime_dtlb_cache_stats[ctx][cpu].n != 0)
> + print_dtlb_cache_misses(cpu, evsel, avg, out);
> + else
> + print_metric(ctxp, NULL, NULL, "of all dTLB cache hits", 0);
> } 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[ctx][cpu].n != 0) {
> - print_itlb_cache_misses(out, cpu, evsel, avg);
> + ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) {
> + if (runtime_itlb_cache_stats[ctx][cpu].n != 0)
> + print_itlb_cache_misses(cpu, evsel, avg, out);
> + else
> + print_metric(ctxp, NULL, NULL, "of all iTLB cache hits", 0);
> } 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[ctx][cpu].n != 0) {
> - print_ll_cache_misses(out, cpu, evsel, avg);
> - } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
> - runtime_cacherefs_stats[ctx][cpu].n != 0) {
> + ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) {
> + if (runtime_ll_cache_stats[ctx][cpu].n != 0)
> + print_ll_cache_misses(cpu, evsel, avg, out);
> + else
> + print_metric(ctxp, NULL, NULL, "of all LL-cache hits", 0);
> + } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES)) {
> total = avg_stats(&runtime_cacherefs_stats[ctx][cpu]);
>
> if (total)
> ratio = avg * 100 / total;
>
> - fprintf(out, " # %8.3f %% of all cache refs ", ratio);
> -
> + if (runtime_cacherefs_stats[ctx][cpu].n != 0)
> + print_metric(ctxp, NULL, "%8.3f %%",
> + "of all cache refs", ratio);
> + else
> + print_metric(ctxp, NULL, NULL, "of all cache refs", 0);
> } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
> - print_stalled_cycles_frontend(out, cpu, evsel, avg);
> + print_stalled_cycles_frontend(cpu, evsel, avg, out);
> } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
> - print_stalled_cycles_backend(out, cpu, evsel, avg);
> + print_stalled_cycles_backend(cpu, evsel, avg, out);
> } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
> total = avg_stats(&runtime_nsecs_stats[cpu]);
>
> if (total) {
> ratio = avg / total;
> - fprintf(out, " # %8.3f GHz ", ratio);
> + print_metric(ctxp, NULL, "%8.3f", "GHz", ratio);
> } else {
> - fprintf(out, " ");
> + print_metric(ctxp, NULL, NULL, "Ghz", 0);
> }
> } else if (perf_stat_evsel__is(evsel, CYCLES_IN_TX)) {
> total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
> if (total)
> - fprintf(out,
> - " # %5.2f%% transactional cycles ",
> - 100.0 * (avg / total));
> + print_metric(ctxp, NULL,
> + "%7.2f%%", "transactional cycles",
> + 100.0 * (avg / total));
> + else
> + print_metric(ctxp, NULL, NULL, "transactional cycles",
> + 0);
> } else if (perf_stat_evsel__is(evsel, CYCLES_IN_TX_CP)) {
> total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
> total2 = avg_stats(&runtime_cycles_in_tx_stats[ctx][cpu]);
> if (total2 < avg)
> total2 = avg;
> if (total)
> - fprintf(out,
> - " # %5.2f%% aborted cycles ",
> + print_metric(ctxp, NULL, "%7.2f%%", "aborted cycles",
> 100.0 * ((total2-avg) / total));
> - } else if (perf_stat_evsel__is(evsel, TRANSACTION_START) &&
> - runtime_cycles_in_tx_stats[ctx][cpu].n != 0) {
> + else
> + print_metric(ctxp, NULL, NULL, "aborted cycles", 0);
> + } else if (perf_stat_evsel__is(evsel, TRANSACTION_START)) {
> total = avg_stats(&runtime_cycles_in_tx_stats[ctx][cpu]);
>
> if (avg)
> ratio = total / avg;
>
> - fprintf(out, " # %8.0f cycles / transaction ", ratio);
> - } else if (perf_stat_evsel__is(evsel, ELISION_START) &&
> - runtime_cycles_in_tx_stats[ctx][cpu].n != 0) {
> + if (runtime_cycles_in_tx_stats[ctx][cpu].n != 0)
> + print_metric(ctxp, NULL, "%8.0f",
> + "cycles / transaction", ratio);
> + else
> + print_metric(ctxp, NULL, NULL, "cycles / transaction",
> + 0);
> + } else if (perf_stat_evsel__is(evsel, ELISION_START)) {
> total = avg_stats(&runtime_cycles_in_tx_stats[ctx][cpu]);
>
> if (avg)
> ratio = total / avg;
> -
> - fprintf(out, " # %8.0f cycles / elision ", ratio);
> - } else if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK) &&
> - (ratio = avg_stats(&walltime_nsecs_stats)) != 0) {
> - fprintf(out, " # %8.3f CPUs utilized ", avg / ratio);
> + print_metric(ctxp, NULL, "%8.0f", "cycles / elision", ratio);
> + } else if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK)) {
> + if ((ratio = avg_stats(&walltime_nsecs_stats)) != 0)
> + print_metric(ctxp, NULL, "%8.3f", "CPUs utilized",
> + avg / ratio);
> + else
> + print_metric(ctxp, NULL, NULL, "CPUs utilized", 0);
> } else if (runtime_nsecs_stats[cpu].n != 0) {
> char unit = 'M';
> + char unit_buf[10];
>
> total = avg_stats(&runtime_nsecs_stats[cpu]);
>
> @@ -427,9 +445,9 @@ void perf_stat__print_shadow_stats(FILE *out, struct perf_evsel *evsel,
> ratio *= 1000;
> unit = 'K';
> }
> -
> - fprintf(out, " # %8.3f %c/sec ", ratio, unit);
> + snprintf(unit_buf, sizeof(unit_buf), "%c/sec", unit);
> + print_metric(ctxp, NULL, "%8.3f", unit_buf, ratio);
> } else {
> - fprintf(out, " ");
> + print_metric(ctxp, NULL, NULL, NULL, 0);
> }
> }
> diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h
> index 62448c8..e1899f6 100644
> --- a/tools/perf/util/stat.h
> +++ b/tools/perf/util/stat.h
> @@ -67,11 +67,22 @@ void perf_stat_evsel_id_init(struct perf_evsel *evsel);
>
> extern struct stats walltime_nsecs_stats;
>
> +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__reset_shadow_stats(void);
> void perf_stat__update_shadow_stats(struct perf_evsel *counter, u64 *count,
> int cpu);
> -void perf_stat__print_shadow_stats(FILE *out, struct perf_evsel *evsel,
> - double avg, int cpu, enum aggr_mode aggr);
> +struct perf_stat_output_ctx {
> + void *ctx;
> + print_metric_t print_metric;
> + new_line_t new_line;
> +};
> +
> +void perf_stat__print_shadow_stats(struct perf_evsel *evsel,
> + double avg, int cpu,
> + struct perf_stat_output_ctx *out);
>
> void perf_evsel__reset_stat_priv(struct perf_evsel *evsel);
> int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel);
> --
> 2.4.3
>
--
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