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linux/tools/perf/util/stat-shadow.c
Andi Kleen 5497628576 perf stat: Fix transaction lenght metrics 
The transaction length metrics in perf stat -T broke recently.

It would not match the metric correctly and always print K/sec.

This was caused by a incorrect update of the cycles_in_tx statistics.

Update the correct variable.

Also the check for zero division was reversed, which resulted in K/sec
being printed for no transactions. Fix this also up.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/1438039491-22091-1-git-send-email-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-07-28 12:05:04 -03:00

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#include <stdio.h>
#include "evsel.h"
#include "stat.h"
#include "color.h"
enum {
CTX_BIT_USER = 1 << 0,
CTX_BIT_KERNEL = 1 << 1,
CTX_BIT_HV = 1 << 2,
CTX_BIT_HOST = 1 << 3,
CTX_BIT_IDLE = 1 << 4,
CTX_BIT_MAX = 1 << 5,
};
#define NUM_CTX CTX_BIT_MAX
static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
static struct stats runtime_cycles_stats[NUM_CTX][MAX_NR_CPUS];
static struct stats runtime_stalled_cycles_front_stats[NUM_CTX][MAX_NR_CPUS];
static struct stats runtime_stalled_cycles_back_stats[NUM_CTX][MAX_NR_CPUS];
static struct stats runtime_branches_stats[NUM_CTX][MAX_NR_CPUS];
static struct stats runtime_cacherefs_stats[NUM_CTX][MAX_NR_CPUS];
static struct stats runtime_l1_dcache_stats[NUM_CTX][MAX_NR_CPUS];
static struct stats runtime_l1_icache_stats[NUM_CTX][MAX_NR_CPUS];
static struct stats runtime_ll_cache_stats[NUM_CTX][MAX_NR_CPUS];
static struct stats runtime_itlb_cache_stats[NUM_CTX][MAX_NR_CPUS];
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];
struct stats walltime_nsecs_stats;
static int evsel_context(struct perf_evsel *evsel)
{
int ctx = 0;
if (evsel->attr.exclude_kernel)
ctx |= CTX_BIT_KERNEL;
if (evsel->attr.exclude_user)
ctx |= CTX_BIT_USER;
if (evsel->attr.exclude_hv)
ctx |= CTX_BIT_HV;
if (evsel->attr.exclude_host)
ctx |= CTX_BIT_HOST;
if (evsel->attr.exclude_idle)
ctx |= CTX_BIT_IDLE;
return ctx;
}
void perf_stat__reset_shadow_stats(void)
{
memset(runtime_nsecs_stats, 0, sizeof(runtime_nsecs_stats));
memset(runtime_cycles_stats, 0, sizeof(runtime_cycles_stats));
memset(runtime_stalled_cycles_front_stats, 0, sizeof(runtime_stalled_cycles_front_stats));
memset(runtime_stalled_cycles_back_stats, 0, sizeof(runtime_stalled_cycles_back_stats));
memset(runtime_branches_stats, 0, sizeof(runtime_branches_stats));
memset(runtime_cacherefs_stats, 0, sizeof(runtime_cacherefs_stats));
memset(runtime_l1_dcache_stats, 0, sizeof(runtime_l1_dcache_stats));
memset(runtime_l1_icache_stats, 0, sizeof(runtime_l1_icache_stats));
memset(runtime_ll_cache_stats, 0, sizeof(runtime_ll_cache_stats));
memset(runtime_itlb_cache_stats, 0, sizeof(runtime_itlb_cache_stats));
memset(runtime_dtlb_cache_stats, 0, sizeof(runtime_dtlb_cache_stats));
memset(runtime_cycles_in_tx_stats, 0,
sizeof(runtime_cycles_in_tx_stats));
memset(runtime_transaction_stats, 0,
sizeof(runtime_transaction_stats));
memset(runtime_elision_stats, 0, sizeof(runtime_elision_stats));
memset(&walltime_nsecs_stats, 0, sizeof(walltime_nsecs_stats));
}
/*
* Update various tracking values we maintain to print
* more semantic information such as miss/hit ratios,
* instruction rates, etc:
*/
void perf_stat__update_shadow_stats(struct perf_evsel *counter, u64 *count,
int cpu)
{
int ctx = evsel_context(counter);
if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
update_stats(&runtime_nsecs_stats[cpu], count[0]);
else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
update_stats(&runtime_cycles_stats[ctx][cpu], count[0]);
else if (perf_stat_evsel__is(counter, CYCLES_IN_TX))
update_stats(&runtime_cycles_in_tx_stats[ctx][cpu], count[0]);
else if (perf_stat_evsel__is(counter, TRANSACTION_START))
update_stats(&runtime_transaction_stats[ctx][cpu], count[0]);
else if (perf_stat_evsel__is(counter, ELISION_START))
update_stats(&runtime_elision_stats[ctx][cpu], count[0]);
else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
update_stats(&runtime_stalled_cycles_front_stats[ctx][cpu], count[0]);
else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
update_stats(&runtime_stalled_cycles_back_stats[ctx][cpu], count[0]);
else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
update_stats(&runtime_branches_stats[ctx][cpu], count[0]);
else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
update_stats(&runtime_cacherefs_stats[ctx][cpu], count[0]);
else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
update_stats(&runtime_l1_dcache_stats[ctx][cpu], count[0]);
else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
update_stats(&runtime_ll_cache_stats[ctx][cpu], count[0]);
else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
update_stats(&runtime_ll_cache_stats[ctx][cpu], count[0]);
else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
update_stats(&runtime_dtlb_cache_stats[ctx][cpu], count[0]);
else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
update_stats(&runtime_itlb_cache_stats[ctx][cpu], count[0]);
}
/* used for get_ratio_color() */
enum grc_type {
GRC_STALLED_CYCLES_FE,
GRC_STALLED_CYCLES_BE,
GRC_CACHE_MISSES,
GRC_MAX_NR
};
static const char *get_ratio_color(enum grc_type type, double ratio)
{
static const double grc_table[GRC_MAX_NR][3] = {
[GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
[GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
[GRC_CACHE_MISSES] = { 20.0, 10.0, 5.0 },
};
const char *color = PERF_COLOR_NORMAL;
if (ratio > grc_table[type][0])
color = PERF_COLOR_RED;
else if (ratio > grc_table[type][1])
color = PERF_COLOR_MAGENTA;
else if (ratio > grc_table[type][2])
color = PERF_COLOR_YELLOW;
return color;
}
static void print_stalled_cycles_frontend(FILE *out, int cpu,
struct perf_evsel *evsel
__maybe_unused, double avg)
{
double total, ratio = 0.0;
const char *color;
int ctx = evsel_context(evsel);
total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
if (total)
ratio = avg / total * 100.0;
color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
fprintf(out, " # ");
color_fprintf(out, color, "%6.2f%%", ratio);
fprintf(out, " frontend cycles idle ");
}
static void print_stalled_cycles_backend(FILE *out, int cpu,
struct perf_evsel *evsel
__maybe_unused, double avg)
{
double total, ratio = 0.0;
const char *color;
int ctx = evsel_context(evsel);
total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
if (total)
ratio = avg / total * 100.0;
color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
fprintf(out, " # ");
color_fprintf(out, color, "%6.2f%%", ratio);
fprintf(out, " backend cycles idle ");
}
static void print_branch_misses(FILE *out, int cpu,
struct perf_evsel *evsel __maybe_unused,
double avg)
{
double total, ratio = 0.0;
const char *color;
int ctx = evsel_context(evsel);
total = avg_stats(&runtime_branches_stats[ctx][cpu]);
if (total)
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 branches ");
}
static void print_l1_dcache_misses(FILE *out, int cpu,
struct perf_evsel *evsel __maybe_unused,
double avg)
{
double total, ratio = 0.0;
const char *color;
int ctx = evsel_context(evsel);
total = avg_stats(&runtime_l1_dcache_stats[ctx][cpu]);
if (total)
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-dcache hits ");
}
static void print_l1_icache_misses(FILE *out, int cpu,
struct perf_evsel *evsel __maybe_unused,
double avg)
{
double total, ratio = 0.0;
const char *color;
int ctx = evsel_context(evsel);
total = avg_stats(&runtime_l1_icache_stats[ctx][cpu]);
if (total)
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 ");
}
static void print_dtlb_cache_misses(FILE *out, int cpu,
struct perf_evsel *evsel __maybe_unused,
double avg)
{
double total, ratio = 0.0;
const char *color;
int ctx = evsel_context(evsel);
total = avg_stats(&runtime_dtlb_cache_stats[ctx][cpu]);
if (total)
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 ");
}
static void print_itlb_cache_misses(FILE *out, int cpu,
struct perf_evsel *evsel __maybe_unused,
double avg)
{
double total, ratio = 0.0;
const char *color;
int ctx = evsel_context(evsel);
total = avg_stats(&runtime_itlb_cache_stats[ctx][cpu]);
if (total)
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 ");
}
static void print_ll_cache_misses(FILE *out, int cpu,
struct perf_evsel *evsel __maybe_unused,
double avg)
{
double total, ratio = 0.0;
const char *color;
int ctx = evsel_context(evsel);
total = avg_stats(&runtime_ll_cache_stats[ctx][cpu]);
if (total)
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 ");
}
void perf_stat__print_shadow_stats(FILE *out, struct perf_evsel *evsel,
double avg, int cpu, enum aggr_mode aggr)
{
double total, ratio = 0.0, total2;
int ctx = evsel_context(evsel);
if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
if (total) {
ratio = avg / total;
fprintf(out, " # %5.2f insns per cycle ", ratio);
} else {
fprintf(out, " ");
}
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);
}
} 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 (
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);
} 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);
} 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);
} 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);
} 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) {
total = avg_stats(&runtime_cacherefs_stats[ctx][cpu]);
if (total)
ratio = avg * 100 / total;
fprintf(out, " # %8.3f %% of all cache refs ", ratio);
} else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
print_stalled_cycles_frontend(out, cpu, evsel, avg);
} else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
print_stalled_cycles_backend(out, cpu, evsel, avg);
} 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);
} else {
fprintf(out, " ");
}
} 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));
} 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 ",
100.0 * ((total2-avg) / total));
} else if (perf_stat_evsel__is(evsel, TRANSACTION_START) &&
runtime_cycles_in_tx_stats[ctx][cpu].n != 0) {
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) {
total = avg_stats(&runtime_cycles_in_tx_stats[ctx][cpu]);
if (avg)
ratio = total / avg;
fprintf(out, " # %8.0f cycles / elision ", ratio);
} else if (runtime_nsecs_stats[cpu].n != 0) {
char unit = 'M';
total = avg_stats(&runtime_nsecs_stats[cpu]);
if (total)
ratio = 1000.0 * avg / total;
if (ratio < 0.001) {
ratio *= 1000;
unit = 'K';
}
fprintf(out, " # %8.3f %c/sec ", ratio, unit);
} else {
fprintf(out, " ");
}
}
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