#include <stdio.h>
#include "evsel.h"
#include "stat.h"
#include "color.h"
#include "pmu.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
/*
* AGGR_GLOBAL: Use CPU 0
* AGGR_SOCKET: Use first CPU of socket
* AGGR_CORE: Use first CPU of core
* AGGR_NONE: Use matching CPU
* AGGR_THREAD: Not supported?
*/
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];
static struct stats runtime_topdown_total_slots[NUM_CTX][MAX_NR_CPUS];
static struct stats runtime_topdown_slots_issued[NUM_CTX][MAX_NR_CPUS];
static struct stats runtime_topdown_slots_retired[NUM_CTX][MAX_NR_CPUS];
static struct stats runtime_topdown_fetch_bubbles[NUM_CTX][MAX_NR_CPUS];
static struct stats runtime_topdown_recovery_bubbles[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;
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));
memset(runtime_topdown_total_slots, 0, sizeof(runtime_topdown_total_slots));
memset(runtime_topdown_slots_retired, 0, sizeof(runtime_topdown_slots_retired));
memset(runtime_topdown_slots_issued, 0, sizeof(runtime_topdown_slots_issued));
memset(runtime_topdown_fetch_bubbles, 0, sizeof(runtime_topdown_fetch_bubbles));
memset(runtime_topdown_recovery_bubbles, 0, sizeof(runtime_topdown_recovery_bubbles));
}
/*
* 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) ||
perf_evsel__match(counter, SOFTWARE, SW_CPU_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_stat_evsel__is(counter, TOPDOWN_TOTAL_SLOTS))
update_stats(&runtime_topdown_total_slots[ctx][cpu], count[0]);
else if (perf_stat_evsel__is(counter, TOPDOWN_SLOTS_ISSUED))
update_stats(&runtime_topdown_slots_issued[ctx][cpu], count[0]);
else if (perf_stat_evsel__is(counter, TOPDOWN_SLOTS_RETIRED))
update_stats(&runtime_topdown_slots_retired[ctx][cpu], count[0]);
else if (perf_stat_evsel__is(counter, TOPDOWN_FETCH_BUBBLES))
update_stats(&runtime_topdown_fetch_bubbles[ctx][cpu],count[0]);
else if (perf_stat_evsel__is(counter, TOPDOWN_RECOVERY_BUBBLES))
update_stats(&runtime_topdown_recovery_bubbles[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(int cpu,
struct perf_evsel *evsel, double avg,
struct perf_stat_output_ctx *out)
{
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);
if (ratio)
out->print_metric(out->ctx, color, "%7.2f%%", "frontend cycles idle",
ratio);
else
out->print_metric(out->ctx, NULL, NULL, "frontend cycles idle", 0);
}
static void print_stalled_cycles_backend(int cpu,
struct perf_evsel *evsel, double avg,
struct perf_stat_output_ctx *out)
{
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);
out->print_metric(out->ctx, color, "%7.2f%%", "backend cycles idle", ratio);
}
static void print_branch_misses(int cpu,
struct perf_evsel *evsel,
double avg,
struct perf_stat_output_ctx *out)
{
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);
out->print_metric(out->ctx, color, "%7.2f%%", "of all branches", ratio);
}
static void print_l1_dcache_misses(int cpu,
struct perf_evsel *evsel,
double avg,
struct perf_stat_output_ctx *out)
{
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);
out->print_metric(out->ctx, color, "%7.2f%%", "of all L1-dcache hits", ratio);
}
static void print_l1_icache_misses(int cpu,
struct perf_evsel *evsel,
double avg,
struct perf_stat_output_ctx *out)
{
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);
out->print_metric(out->ctx, color, "%7.2f%%", "of all L1-icache hits", ratio);
}
static void print_dtlb_cache_misses(int cpu,
struct perf_evsel *evsel,
double avg,
struct perf_stat_output_ctx *out)
{
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);
out->print_metric(out->ctx, color, "%7.2f%%", "of all dTLB cache hits", ratio);
}
static void print_itlb_cache_misses(int cpu,
struct perf_evsel *evsel,
double avg,
struct perf_stat_output_ctx *out)
{
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);
out->print_metric(out->ctx, color, "%7.2f%%", "of all iTLB cache hits", ratio);
}
static void print_ll_cache_misses(int cpu,
struct perf_evsel *evsel,
double avg,
struct perf_stat_output_ctx *out)
{
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);
out->print_metric(out->ctx, color, "%7.2f%%", "of all LL-cache hits", ratio);
}
/*
* High level "TopDown" CPU core pipe line bottleneck break down.
*
* Basic concept following
* Yasin, A Top Down Method for Performance analysis and Counter architecture
* ISPASS14
*
* The CPU pipeline is divided into 4 areas that can be bottlenecks:
*
* Frontend -> Backend -> Retiring
* BadSpeculation in addition means out of order execution that is thrown away
* (for example branch mispredictions)
* Frontend is instruction decoding.
* Backend is execution, like computation and accessing data in memory
* Retiring is good execution that is not directly bottlenecked
*
* The formulas are computed in slots.
* A slot is an entry in the pipeline each for the pipeline width
* (for example a 4-wide pipeline has 4 slots for each cycle)
*
* Formulas:
* BadSpeculation = ((SlotsIssued - SlotsRetired) + RecoveryBubbles) /
* TotalSlots
* Retiring = SlotsRetired / TotalSlots
* FrontendBound = FetchBubbles / TotalSlots
* BackendBound = 1.0 - BadSpeculation - Retiring - FrontendBound
*
* The kernel provides the mapping to the low level CPU events and any scaling
* needed for the CPU pipeline width, for example:
*
* TotalSlots = Cycles * 4
*
* The scaling factor is communicated in the sysfs unit.
*
* In some cases the CPU may not be able to measure all the formulas due to
* missing events. In this case multiple formulas are combined, as possible.
*
* Full TopDown supports more levels to sub-divide each area: for example
* BackendBound into computing bound and memory bound. For now we only
* support Level 1 TopDown.
*/
static double sanitize_val(double x)
{
if (x < 0 && x >= -0.02)
return 0.0;
return x;
}
static double td_total_slots(int ctx, int cpu)
{
return avg_stats(&runtime_topdown_total_slots[ctx][cpu]);
}
static double td_bad_spec(int ctx, int cpu)
{
double bad_spec = 0;
double total_slots;
double total;
total = avg_stats(&runtime_topdown_slots_issued[ctx][cpu]) -
avg_stats(&runtime_topdown_slots_retired[ctx][cpu]) +
avg_stats(&runtime_topdown_recovery_bubbles[ctx][cpu]);
total_slots = td_total_slots(ctx, cpu);
if (total_slots)
bad_spec = total / total_slots;
return sanitize_val(bad_spec);
}
static double td_retiring(int ctx, int cpu)
{
double retiring = 0;
double total_slots = td_total_slots(ctx, cpu);
double ret_slots = avg_stats(&runtime_topdown_slots_retired[ctx][cpu]);
if (total_slots)
retiring = ret_slots / total_slots;
return retiring;
}
static double td_fe_bound(int ctx, int cpu)
{
double fe_bound = 0;
double total_slots = td_total_slots(ctx, cpu);
double fetch_bub = avg_stats(&runtime_topdown_fetch_bubbles[ctx][cpu]);
if (total_slots)
fe_bound = fetch_bub / total_slots;
return fe_bound;
}
static double td_be_bound(int ctx, int cpu)
{
double sum = (td_fe_bound(ctx, cpu) +
td_bad_spec(ctx, cpu) +
td_retiring(ctx, cpu));
if (sum == 0)
return 0;
return sanitize_val(1.0 - sum);
}
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;
const char *color = NULL;
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;
print_metric(ctxp, NULL, "%7.2f ",
"insn per cycle", ratio);
} else {
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) {
out->new_line(ctxp);
ratio = total / avg;
print_metric(ctxp, NULL, "%7.2f ",
"stalled cycles per insn",
ratio);
} else if (have_frontend_stalled) {
print_metric(ctxp, NULL, NULL,
"stalled cycles per insn", 0);
}
} 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))) {
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))) {
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))) {
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))) {
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))) {
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;
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(cpu, evsel, avg, out);
} else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
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;
print_metric(ctxp, NULL, "%8.3f", "GHz", ratio);
} else {
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)
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)
print_metric(ctxp, NULL, "%7.2f%%", "aborted cycles",
100.0 * ((total2-avg) / total));
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;
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;
print_metric(ctxp, NULL, "%8.0f", "cycles / elision", ratio);
} else if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK) ||
perf_evsel__match(evsel, SOFTWARE, SW_CPU_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 (perf_stat_evsel__is(evsel, TOPDOWN_FETCH_BUBBLES)) {
double fe_bound = td_fe_bound(ctx, cpu);
if (fe_bound > 0.2)
color = PERF_COLOR_RED;
print_metric(ctxp, color, "%8.1f%%", "frontend bound",
fe_bound * 100.);
} else if (perf_stat_evsel__is(evsel, TOPDOWN_SLOTS_RETIRED)) {
double retiring = td_retiring(ctx, cpu);
if (retiring > 0.7)
color = PERF_COLOR_GREEN;
print_metric(ctxp, color, "%8.1f%%", "retiring",
retiring * 100.);
} else if (perf_stat_evsel__is(evsel, TOPDOWN_RECOVERY_BUBBLES)) {
double bad_spec = td_bad_spec(ctx, cpu);
if (bad_spec > 0.1)
color = PERF_COLOR_RED;
print_metric(ctxp, color, "%8.1f%%", "bad speculation",
bad_spec * 100.);
} else if (perf_stat_evsel__is(evsel, TOPDOWN_SLOTS_ISSUED)) {
double be_bound = td_be_bound(ctx, cpu);
const char *name = "backend bound";
static int have_recovery_bubbles = -1;
/* In case the CPU does not support topdown-recovery-bubbles */
if (have_recovery_bubbles < 0)
have_recovery_bubbles = pmu_have_event("cpu",
"topdown-recovery-bubbles");
if (!have_recovery_bubbles)
name = "backend bound/bad spec";
if (be_bound > 0.2)
color = PERF_COLOR_RED;
if (td_total_slots(ctx, cpu) > 0)
print_metric(ctxp, color, "%8.1f%%", name,
be_bound * 100.);
else
print_metric(ctxp, NULL, NULL, name, 0);
} else if (runtime_nsecs_stats[cpu].n != 0) {
char unit = 'M';
char unit_buf[10];
total = avg_stats(&runtime_nsecs_stats[cpu]);
if (total)
ratio = 1000.0 * avg / total;
if (ratio < 0.001) {
ratio *= 1000;
unit = 'K';
}
snprintf(unit_buf, sizeof(unit_buf), "%c/sec", unit);
print_metric(ctxp, NULL, "%8.3f", unit_buf, ratio);
} else {
print_metric(ctxp, NULL, NULL, NULL, 0);
}
}