Add support to getting a common set of metrics from a default
table. It simplifies the generation to add json metrics at the same
time. The metrics added are CPUs_utilized, cs_per_second,
migrations_per_second, page_faults_per_second, insn_per_cycle,
stalled_cycles_per_instruction, frontend_cycles_idle,
backend_cycles_idle, cycles_frequency, branch_frequency and
branch_miss_rate based on the shadow metric definitions.
Following this change the default perf stat output on an alderlake looks like:
```
$ perf stat -a -- sleep 1
Performance counter stats for 'system wide':
28,165,735,434 cpu-clock # 27.973 CPUs utilized
23,220 context-switches # 824.406 /sec
833 cpu-migrations # 29.575 /sec
35,293 page-faults # 1.253 K/sec
997,341,554 cpu_atom/instructions/ # 0.84 insn per cycle (35.63%)
11,197,053,736 cpu_core/instructions/ # 1.97 insn per cycle (58.21%)
1,184,871,493 cpu_atom/cycles/ # 0.042 GHz (35.64%)
5,676,692,769 cpu_core/cycles/ # 0.202 GHz (58.22%)
150,525,309 cpu_atom/branches/ # 5.344 M/sec (42.80%)
2,277,232,030 cpu_core/branches/ # 80.851 M/sec (58.21%)
5,248,575 cpu_atom/branch-misses/ # 3.49% of all branches (42.82%)
28,829,930 cpu_core/branch-misses/ # 1.27% of all branches (58.22%)
(software) # 824.4 cs/sec cs_per_second
TopdownL1 (cpu_core) # 12.6 % tma_bad_speculation
# 28.8 % tma_frontend_bound (66.57%)
TopdownL1 (cpu_core) # 25.8 % tma_backend_bound
# 32.8 % tma_retiring (66.57%)
(software) # 1253.1 faults/sec page_faults_per_second
# 0.0 GHz cycles_frequency (42.80%)
# 0.2 GHz cycles_frequency (74.92%)
TopdownL1 (cpu_atom) # 22.3 % tma_bad_speculation
# 17.2 % tma_retiring (49.95%)
TopdownL1 (cpu_atom) # 30.6 % tma_backend_bound
# 29.8 % tma_frontend_bound (49.94%)
(cpu_atom) # 6.9 K/sec branch_frequency (42.89%)
# 80.5 K/sec branch_frequency (74.93%)
# 29.6 migrations/sec migrations_per_second
# 28.0 CPUs CPUs_utilized
(cpu_atom) # 0.8 instructions insn_per_cycle (42.91%)
# 2.0 instructions insn_per_cycle (75.14%)
(cpu_atom) # 3.8 % branch_miss_rate (35.75%)
# 1.2 % branch_miss_rate (66.86%)
1.007063529 seconds time elapsed
```
Signed-off-by: Ian Rogers <irogers@google.com>
---
.../arch/common/common/metrics.json | 86 +++++++++++++
tools/perf/pmu-events/empty-pmu-events.c | 115 +++++++++++++-----
tools/perf/pmu-events/jevents.py | 21 +++-
tools/perf/pmu-events/pmu-events.h | 1 +
tools/perf/util/metricgroup.c | 31 +++--
5 files changed, 212 insertions(+), 42 deletions(-)
create mode 100644 tools/perf/pmu-events/arch/common/common/metrics.json
diff --git a/tools/perf/pmu-events/arch/common/common/metrics.json b/tools/perf/pmu-events/arch/common/common/metrics.json
new file mode 100644
index 000000000000..d1e37db18dc6
--- /dev/null
+++ b/tools/perf/pmu-events/arch/common/common/metrics.json
@@ -0,0 +1,86 @@
+[
+ {
+ "BriefDescription": "Average CPU utilization",
+ "MetricExpr": "(software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@) / (duration_time * 1e9)",
+ "MetricGroup": "Default",
+ "MetricName": "CPUs_utilized",
+ "ScaleUnit": "1CPUs",
+ "MetricConstraint": "NO_GROUP_EVENTS"
+ },
+ {
+ "BriefDescription": "Context switches per CPU second",
+ "MetricExpr": "(software@context\\-switches\\,name\\=context\\-switches@ * 1e9) / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)",
+ "MetricGroup": "Default",
+ "MetricName": "cs_per_second",
+ "ScaleUnit": "1cs/sec",
+ "MetricConstraint": "NO_GROUP_EVENTS"
+ },
+ {
+ "BriefDescription": "Process migrations to a new CPU per CPU second",
+ "MetricExpr": "(software@cpu\\-migrations\\,name\\=cpu\\-migrations@ * 1e9) / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)",
+ "MetricGroup": "Default",
+ "MetricName": "migrations_per_second",
+ "ScaleUnit": "1migrations/sec",
+ "MetricConstraint": "NO_GROUP_EVENTS"
+ },
+ {
+ "BriefDescription": "Page faults per CPU second",
+ "MetricExpr": "(software@page\\-faults\\,name\\=page\\-faults@ * 1e9) / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)",
+ "MetricGroup": "Default",
+ "MetricName": "page_faults_per_second",
+ "ScaleUnit": "1faults/sec",
+ "MetricConstraint": "NO_GROUP_EVENTS"
+ },
+ {
+ "BriefDescription": "Instructions Per Cycle",
+ "MetricExpr": "instructions / cpu\\-cycles",
+ "MetricGroup": "Default",
+ "MetricName": "insn_per_cycle",
+ "MetricThreshold": "insn_per_cycle < 1",
+ "ScaleUnit": "1instructions"
+ },
+ {
+ "BriefDescription": "Max front or backend stalls per instruction",
+ "MetricExpr": "max(stalled\\-cycles\\-frontend, stalled\\-cycles\\-backend) / instructions",
+ "MetricGroup": "Default",
+ "MetricName": "stalled_cycles_per_instruction"
+ },
+ {
+ "BriefDescription": "Frontend stalls per cycle",
+ "MetricExpr": "stalled\\-cycles\\-frontend / cpu\\-cycles",
+ "MetricGroup": "Default",
+ "MetricName": "frontend_cycles_idle",
+ "MetricThreshold": "frontend_cycles_idle > 0.1"
+ },
+ {
+ "BriefDescription": "Backend stalls per cycle",
+ "MetricExpr": "stalled\\-cycles\\-backend / cpu\\-cycles",
+ "MetricGroup": "Default",
+ "MetricName": "backend_cycles_idle",
+ "MetricThreshold": "backend_cycles_idle > 0.2"
+ },
+ {
+ "BriefDescription": "Cycles per CPU second",
+ "MetricExpr": "cpu\\-cycles / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)",
+ "MetricGroup": "Default",
+ "MetricName": "cycles_frequency",
+ "ScaleUnit": "1GHz",
+ "MetricConstraint": "NO_GROUP_EVENTS"
+ },
+ {
+ "BriefDescription": "Branches per CPU second",
+ "MetricExpr": "branches / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)",
+ "MetricGroup": "Default",
+ "MetricName": "branch_frequency",
+ "ScaleUnit": "1000K/sec",
+ "MetricConstraint": "NO_GROUP_EVENTS"
+ },
+ {
+ "BriefDescription": "Branch miss rate",
+ "MetricExpr": "branch\\-misses / branches",
+ "MetricGroup": "Default",
+ "MetricName": "branch_miss_rate",
+ "MetricThreshold": "branch_miss_rate > 0.05",
+ "ScaleUnit": "100%"
+ }
+]
diff --git a/tools/perf/pmu-events/empty-pmu-events.c b/tools/perf/pmu-events/empty-pmu-events.c
index 5120fb93690e..83a01ecc625e 100644
--- a/tools/perf/pmu-events/empty-pmu-events.c
+++ b/tools/perf/pmu-events/empty-pmu-events.c
@@ -1303,21 +1303,32 @@ static const char *const big_c_string =
/* offset=127503 */ "sys_ccn_pmu.read_cycles\000uncore\000ccn read-cycles event\000config=0x2c\0000x01\00000\000\000\000\000\000"
/* offset=127580 */ "uncore_sys_cmn_pmu\000"
/* offset=127599 */ "sys_cmn_pmu.hnf_cache_miss\000uncore\000Counts total cache misses in first lookup result (high priority)\000eventid=1,type=5\000(434|436|43c|43a).*\00000\000\000\000\000\000"
-/* offset=127742 */ "CPI\000\0001 / IPC\000\000\000\000\000\000\000\00000"
-/* offset=127764 */ "IPC\000group1\000inst_retired.any / cpu_clk_unhalted.thread\000\000\000\000\000\000\000\00000"
-/* offset=127827 */ "Frontend_Bound_SMT\000\000idq_uops_not_delivered.core / (4 * (cpu_clk_unhalted.thread / 2 * (1 + cpu_clk_unhalted.one_thread_active / cpu_clk_unhalted.ref_xclk)))\000\000\000\000\000\000\000\00000"
-/* offset=127993 */ "dcache_miss_cpi\000\000l1d\\-loads\\-misses / inst_retired.any\000\000\000\000\000\000\000\00000"
-/* offset=128057 */ "icache_miss_cycles\000\000l1i\\-loads\\-misses / inst_retired.any\000\000\000\000\000\000\000\00000"
-/* offset=128124 */ "cache_miss_cycles\000group1\000dcache_miss_cpi + icache_miss_cycles\000\000\000\000\000\000\000\00000"
-/* offset=128195 */ "DCache_L2_All_Hits\000\000l2_rqsts.demand_data_rd_hit + l2_rqsts.pf_hit + l2_rqsts.rfo_hit\000\000\000\000\000\000\000\00000"
-/* offset=128289 */ "DCache_L2_All_Miss\000\000max(l2_rqsts.all_demand_data_rd - l2_rqsts.demand_data_rd_hit, 0) + l2_rqsts.pf_miss + l2_rqsts.rfo_miss\000\000\000\000\000\000\000\00000"
-/* offset=128423 */ "DCache_L2_All\000\000DCache_L2_All_Hits + DCache_L2_All_Miss\000\000\000\000\000\000\000\00000"
-/* offset=128487 */ "DCache_L2_Hits\000\000d_ratio(DCache_L2_All_Hits, DCache_L2_All)\000\000\000\000\000\000\000\00000"
-/* offset=128555 */ "DCache_L2_Misses\000\000d_ratio(DCache_L2_All_Miss, DCache_L2_All)\000\000\000\000\000\000\000\00000"
-/* offset=128625 */ "M1\000\000ipc + M2\000\000\000\000\000\000\000\00000"
-/* offset=128647 */ "M2\000\000ipc + M1\000\000\000\000\000\000\000\00000"
-/* offset=128669 */ "M3\000\0001 / M3\000\000\000\000\000\000\000\00000"
-/* offset=128689 */ "L1D_Cache_Fill_BW\000\00064 * l1d.replacement / 1e9 / duration_time\000\000\000\000\000\000\000\00000"
+/* offset=127742 */ "CPUs_utilized\000Default\000(software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@) / (duration_time * 1e9)\000\000Average CPU utilization\000\0001CPUs\000\000\000\00001"
+/* offset=127927 */ "cs_per_second\000Default\000software@context\\-switches\\,name\\=context\\-switches@ * 1e9 / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)\000\000Context switches per CPU second\000\0001cs/sec\000\000\000\00001"
+/* offset=128159 */ "migrations_per_second\000Default\000software@cpu\\-migrations\\,name\\=cpu\\-migrations@ * 1e9 / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)\000\000Process migrations to a new CPU per CPU second\000\0001migrations/sec\000\000\000\00001"
+/* offset=128418 */ "page_faults_per_second\000Default\000software@page\\-faults\\,name\\=page\\-faults@ * 1e9 / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)\000\000Page faults per CPU second\000\0001faults/sec\000\000\000\00001"
+/* offset=128648 */ "insn_per_cycle\000Default\000instructions / cpu\\-cycles\000insn_per_cycle < 1\000Instructions Per Cycle\000\0001instructions\000\000\000\00000"
+/* offset=128760 */ "stalled_cycles_per_instruction\000Default\000max(stalled\\-cycles\\-frontend, stalled\\-cycles\\-backend) / instructions\000\000Max front or backend stalls per instruction\000\000\000\000\000\00000"
+/* offset=128923 */ "frontend_cycles_idle\000Default\000stalled\\-cycles\\-frontend / cpu\\-cycles\000frontend_cycles_idle > 0.1\000Frontend stalls per cycle\000\000\000\000\000\00000"
+/* offset=129052 */ "backend_cycles_idle\000Default\000stalled\\-cycles\\-backend / cpu\\-cycles\000backend_cycles_idle > 0.2\000Backend stalls per cycle\000\000\000\000\000\00000"
+/* offset=129177 */ "cycles_frequency\000Default\000cpu\\-cycles / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)\000\000Cycles per CPU second\000\0001GHz\000\000\000\00001"
+/* offset=129352 */ "branch_frequency\000Default\000branches / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)\000\000Branches per CPU second\000\0001000K/sec\000\000\000\00001"
+/* offset=129531 */ "branch_miss_rate\000Default\000branch\\-misses / branches\000branch_miss_rate > 0.05\000Branch miss rate\000\000100%\000\000\000\00000"
+/* offset=129634 */ "CPI\000\0001 / IPC\000\000\000\000\000\000\000\00000"
+/* offset=129656 */ "IPC\000group1\000inst_retired.any / cpu_clk_unhalted.thread\000\000\000\000\000\000\000\00000"
+/* offset=129719 */ "Frontend_Bound_SMT\000\000idq_uops_not_delivered.core / (4 * (cpu_clk_unhalted.thread / 2 * (1 + cpu_clk_unhalted.one_thread_active / cpu_clk_unhalted.ref_xclk)))\000\000\000\000\000\000\000\00000"
+/* offset=129885 */ "dcache_miss_cpi\000\000l1d\\-loads\\-misses / inst_retired.any\000\000\000\000\000\000\000\00000"
+/* offset=129949 */ "icache_miss_cycles\000\000l1i\\-loads\\-misses / inst_retired.any\000\000\000\000\000\000\000\00000"
+/* offset=130016 */ "cache_miss_cycles\000group1\000dcache_miss_cpi + icache_miss_cycles\000\000\000\000\000\000\000\00000"
+/* offset=130087 */ "DCache_L2_All_Hits\000\000l2_rqsts.demand_data_rd_hit + l2_rqsts.pf_hit + l2_rqsts.rfo_hit\000\000\000\000\000\000\000\00000"
+/* offset=130181 */ "DCache_L2_All_Miss\000\000max(l2_rqsts.all_demand_data_rd - l2_rqsts.demand_data_rd_hit, 0) + l2_rqsts.pf_miss + l2_rqsts.rfo_miss\000\000\000\000\000\000\000\00000"
+/* offset=130315 */ "DCache_L2_All\000\000DCache_L2_All_Hits + DCache_L2_All_Miss\000\000\000\000\000\000\000\00000"
+/* offset=130379 */ "DCache_L2_Hits\000\000d_ratio(DCache_L2_All_Hits, DCache_L2_All)\000\000\000\000\000\000\000\00000"
+/* offset=130447 */ "DCache_L2_Misses\000\000d_ratio(DCache_L2_All_Miss, DCache_L2_All)\000\000\000\000\000\000\000\00000"
+/* offset=130517 */ "M1\000\000ipc + M2\000\000\000\000\000\000\000\00000"
+/* offset=130539 */ "M2\000\000ipc + M1\000\000\000\000\000\000\000\00000"
+/* offset=130561 */ "M3\000\0001 / M3\000\000\000\000\000\000\000\00000"
+/* offset=130581 */ "L1D_Cache_Fill_BW\000\00064 * l1d.replacement / 1e9 / duration_time\000\000\000\000\000\000\000\00000"
;
static const struct compact_pmu_event pmu_events__common_default_core[] = {
@@ -2603,6 +2614,29 @@ static const struct pmu_table_entry pmu_events__common[] = {
},
};
+static const struct compact_pmu_event pmu_metrics__common_default_core[] = {
+{ 127742 }, /* CPUs_utilized\000Default\000(software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@) / (duration_time * 1e9)\000\000Average CPU utilization\000\0001CPUs\000\000\000\00001 */
+{ 129052 }, /* backend_cycles_idle\000Default\000stalled\\-cycles\\-backend / cpu\\-cycles\000backend_cycles_idle > 0.2\000Backend stalls per cycle\000\000\000\000\000\00000 */
+{ 129352 }, /* branch_frequency\000Default\000branches / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)\000\000Branches per CPU second\000\0001000K/sec\000\000\000\00001 */
+{ 129531 }, /* branch_miss_rate\000Default\000branch\\-misses / branches\000branch_miss_rate > 0.05\000Branch miss rate\000\000100%\000\000\000\00000 */
+{ 127927 }, /* cs_per_second\000Default\000software@context\\-switches\\,name\\=context\\-switches@ * 1e9 / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)\000\000Context switches per CPU second\000\0001cs/sec\000\000\000\00001 */
+{ 129177 }, /* cycles_frequency\000Default\000cpu\\-cycles / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)\000\000Cycles per CPU second\000\0001GHz\000\000\000\00001 */
+{ 128923 }, /* frontend_cycles_idle\000Default\000stalled\\-cycles\\-frontend / cpu\\-cycles\000frontend_cycles_idle > 0.1\000Frontend stalls per cycle\000\000\000\000\000\00000 */
+{ 128648 }, /* insn_per_cycle\000Default\000instructions / cpu\\-cycles\000insn_per_cycle < 1\000Instructions Per Cycle\000\0001instructions\000\000\000\00000 */
+{ 128159 }, /* migrations_per_second\000Default\000software@cpu\\-migrations\\,name\\=cpu\\-migrations@ * 1e9 / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)\000\000Process migrations to a new CPU per CPU second\000\0001migrations/sec\000\000\000\00001 */
+{ 128418 }, /* page_faults_per_second\000Default\000software@page\\-faults\\,name\\=page\\-faults@ * 1e9 / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)\000\000Page faults per CPU second\000\0001faults/sec\000\000\000\00001 */
+{ 128760 }, /* stalled_cycles_per_instruction\000Default\000max(stalled\\-cycles\\-frontend, stalled\\-cycles\\-backend) / instructions\000\000Max front or backend stalls per instruction\000\000\000\000\000\00000 */
+
+};
+
+static const struct pmu_table_entry pmu_metrics__common[] = {
+{
+ .entries = pmu_metrics__common_default_core,
+ .num_entries = ARRAY_SIZE(pmu_metrics__common_default_core),
+ .pmu_name = { 0 /* default_core\000 */ },
+},
+};
+
static const struct compact_pmu_event pmu_events__test_soc_cpu_default_core[] = {
{ 126189 }, /* bp_l1_btb_correct\000branch\000L1 BTB Correction\000event=0x8a\000\00000\000\000\000\000\000 */
{ 126251 }, /* bp_l2_btb_correct\000branch\000L2 BTB Correction\000event=0x8b\000\00000\000\000\000\000\000 */
@@ -2664,21 +2698,21 @@ static const struct pmu_table_entry pmu_events__test_soc_cpu[] = {
};
static const struct compact_pmu_event pmu_metrics__test_soc_cpu_default_core[] = {
-{ 127742 }, /* CPI\000\0001 / IPC\000\000\000\000\000\000\000\00000 */
-{ 128423 }, /* DCache_L2_All\000\000DCache_L2_All_Hits + DCache_L2_All_Miss\000\000\000\000\000\000\000\00000 */
-{ 128195 }, /* DCache_L2_All_Hits\000\000l2_rqsts.demand_data_rd_hit + l2_rqsts.pf_hit + l2_rqsts.rfo_hit\000\000\000\000\000\000\000\00000 */
-{ 128289 }, /* DCache_L2_All_Miss\000\000max(l2_rqsts.all_demand_data_rd - l2_rqsts.demand_data_rd_hit, 0) + l2_rqsts.pf_miss + l2_rqsts.rfo_miss\000\000\000\000\000\000\000\00000 */
-{ 128487 }, /* DCache_L2_Hits\000\000d_ratio(DCache_L2_All_Hits, DCache_L2_All)\000\000\000\000\000\000\000\00000 */
-{ 128555 }, /* DCache_L2_Misses\000\000d_ratio(DCache_L2_All_Miss, DCache_L2_All)\000\000\000\000\000\000\000\00000 */
-{ 127827 }, /* Frontend_Bound_SMT\000\000idq_uops_not_delivered.core / (4 * (cpu_clk_unhalted.thread / 2 * (1 + cpu_clk_unhalted.one_thread_active / cpu_clk_unhalted.ref_xclk)))\000\000\000\000\000\000\000\00000 */
-{ 127764 }, /* IPC\000group1\000inst_retired.any / cpu_clk_unhalted.thread\000\000\000\000\000\000\000\00000 */
-{ 128689 }, /* L1D_Cache_Fill_BW\000\00064 * l1d.replacement / 1e9 / duration_time\000\000\000\000\000\000\000\00000 */
-{ 128625 }, /* M1\000\000ipc + M2\000\000\000\000\000\000\000\00000 */
-{ 128647 }, /* M2\000\000ipc + M1\000\000\000\000\000\000\000\00000 */
-{ 128669 }, /* M3\000\0001 / M3\000\000\000\000\000\000\000\00000 */
-{ 128124 }, /* cache_miss_cycles\000group1\000dcache_miss_cpi + icache_miss_cycles\000\000\000\000\000\000\000\00000 */
-{ 127993 }, /* dcache_miss_cpi\000\000l1d\\-loads\\-misses / inst_retired.any\000\000\000\000\000\000\000\00000 */
-{ 128057 }, /* icache_miss_cycles\000\000l1i\\-loads\\-misses / inst_retired.any\000\000\000\000\000\000\000\00000 */
+{ 129634 }, /* CPI\000\0001 / IPC\000\000\000\000\000\000\000\00000 */
+{ 130315 }, /* DCache_L2_All\000\000DCache_L2_All_Hits + DCache_L2_All_Miss\000\000\000\000\000\000\000\00000 */
+{ 130087 }, /* DCache_L2_All_Hits\000\000l2_rqsts.demand_data_rd_hit + l2_rqsts.pf_hit + l2_rqsts.rfo_hit\000\000\000\000\000\000\000\00000 */
+{ 130181 }, /* DCache_L2_All_Miss\000\000max(l2_rqsts.all_demand_data_rd - l2_rqsts.demand_data_rd_hit, 0) + l2_rqsts.pf_miss + l2_rqsts.rfo_miss\000\000\000\000\000\000\000\00000 */
+{ 130379 }, /* DCache_L2_Hits\000\000d_ratio(DCache_L2_All_Hits, DCache_L2_All)\000\000\000\000\000\000\000\00000 */
+{ 130447 }, /* DCache_L2_Misses\000\000d_ratio(DCache_L2_All_Miss, DCache_L2_All)\000\000\000\000\000\000\000\00000 */
+{ 129719 }, /* Frontend_Bound_SMT\000\000idq_uops_not_delivered.core / (4 * (cpu_clk_unhalted.thread / 2 * (1 + cpu_clk_unhalted.one_thread_active / cpu_clk_unhalted.ref_xclk)))\000\000\000\000\000\000\000\00000 */
+{ 129656 }, /* IPC\000group1\000inst_retired.any / cpu_clk_unhalted.thread\000\000\000\000\000\000\000\00000 */
+{ 130581 }, /* L1D_Cache_Fill_BW\000\00064 * l1d.replacement / 1e9 / duration_time\000\000\000\000\000\000\000\00000 */
+{ 130517 }, /* M1\000\000ipc + M2\000\000\000\000\000\000\000\00000 */
+{ 130539 }, /* M2\000\000ipc + M1\000\000\000\000\000\000\000\00000 */
+{ 130561 }, /* M3\000\0001 / M3\000\000\000\000\000\000\000\00000 */
+{ 130016 }, /* cache_miss_cycles\000group1\000dcache_miss_cpi + icache_miss_cycles\000\000\000\000\000\000\000\00000 */
+{ 129885 }, /* dcache_miss_cpi\000\000l1d\\-loads\\-misses / inst_retired.any\000\000\000\000\000\000\000\00000 */
+{ 129949 }, /* icache_miss_cycles\000\000l1i\\-loads\\-misses / inst_retired.any\000\000\000\000\000\000\000\00000 */
};
@@ -2759,7 +2793,10 @@ static const struct pmu_events_map pmu_events_map[] = {
.pmus = pmu_events__common,
.num_pmus = ARRAY_SIZE(pmu_events__common),
},
- .metric_table = {},
+ .metric_table = {
+ .pmus = pmu_metrics__common,
+ .num_pmus = ARRAY_SIZE(pmu_metrics__common),
+ },
},
{
.arch = "testarch",
@@ -3208,6 +3245,22 @@ const struct pmu_metrics_table *pmu_metrics_table__find(void)
return map ? &map->metric_table : NULL;
}
+const struct pmu_metrics_table *pmu_metrics_table__default(void)
+{
+ int i = 0;
+
+ for (;;) {
+ const struct pmu_events_map *map = &pmu_events_map[i++];
+
+ if (!map->arch)
+ break;
+
+ if (!strcmp(map->cpuid, "common"))
+ return &map->metric_table;
+ }
+ return NULL;
+}
+
const struct pmu_events_table *find_core_events_table(const char *arch, const char *cpuid)
{
for (const struct pmu_events_map *tables = &pmu_events_map[0];
diff --git a/tools/perf/pmu-events/jevents.py b/tools/perf/pmu-events/jevents.py
index 786a7049363f..5d3f4b44cfb7 100755
--- a/tools/perf/pmu-events/jevents.py
+++ b/tools/perf/pmu-events/jevents.py
@@ -755,7 +755,10 @@ static const struct pmu_events_map pmu_events_map[] = {
\t\t.pmus = pmu_events__common,
\t\t.num_pmus = ARRAY_SIZE(pmu_events__common),
\t},
-\t.metric_table = {},
+\t.metric_table = {
+\t\t.pmus = pmu_metrics__common,
+\t\t.num_pmus = ARRAY_SIZE(pmu_metrics__common),
+\t},
},
""")
else:
@@ -1237,6 +1240,22 @@ const struct pmu_metrics_table *pmu_metrics_table__find(void)
return map ? &map->metric_table : NULL;
}
+const struct pmu_metrics_table *pmu_metrics_table__default(void)
+{
+ int i = 0;
+
+ for (;;) {
+ const struct pmu_events_map *map = &pmu_events_map[i++];
+
+ if (!map->arch)
+ break;
+
+ if (!strcmp(map->cpuid, "common"))
+ return &map->metric_table;
+ }
+ return NULL;
+}
+
const struct pmu_events_table *find_core_events_table(const char *arch, const char *cpuid)
{
for (const struct pmu_events_map *tables = &pmu_events_map[0];
diff --git a/tools/perf/pmu-events/pmu-events.h b/tools/perf/pmu-events/pmu-events.h
index e0535380c0b2..559265a903c8 100644
--- a/tools/perf/pmu-events/pmu-events.h
+++ b/tools/perf/pmu-events/pmu-events.h
@@ -127,6 +127,7 @@ int pmu_metrics_table__find_metric(const struct pmu_metrics_table *table,
const struct pmu_events_table *perf_pmu__find_events_table(struct perf_pmu *pmu);
const struct pmu_events_table *perf_pmu__default_core_events_table(void);
const struct pmu_metrics_table *pmu_metrics_table__find(void);
+const struct pmu_metrics_table *pmu_metrics_table__default(void);
const struct pmu_events_table *find_core_events_table(const char *arch, const char *cpuid);
const struct pmu_metrics_table *find_core_metrics_table(const char *arch, const char *cpuid);
int pmu_for_each_core_event(pmu_event_iter_fn fn, void *data);
diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index 76092ee26761..e67e04ce01c9 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -424,10 +424,18 @@ int metricgroup__for_each_metric(const struct pmu_metrics_table *table, pmu_metr
.fn = fn,
.data = data,
};
+ const struct pmu_metrics_table *tables[2] = {
+ table,
+ pmu_metrics_table__default(),
+ };
+
+ for (size_t i = 0; i < ARRAY_SIZE(tables); i++) {
+ int ret;
- if (table) {
- int ret = pmu_metrics_table__for_each_metric(table, fn, data);
+ if (!tables[i])
+ continue;
+ ret = pmu_metrics_table__for_each_metric(tables[i], fn, data);
if (ret)
return ret;
}
@@ -1581,19 +1589,22 @@ static int metricgroup__has_metric_or_groups_callback(const struct pmu_metric *p
bool metricgroup__has_metric_or_groups(const char *pmu, const char *metric_or_groups)
{
- const struct pmu_metrics_table *table = pmu_metrics_table__find();
+ const struct pmu_metrics_table *tables[2] = {
+ pmu_metrics_table__find(),
+ pmu_metrics_table__default(),
+ };
struct metricgroup__has_metric_data data = {
.pmu = pmu,
.metric_or_groups = metric_or_groups,
};
- if (!table)
- return false;
-
- return pmu_metrics_table__for_each_metric(table,
- metricgroup__has_metric_or_groups_callback,
- &data)
- ? true : false;
+ for (size_t i = 0; i < ARRAY_SIZE(tables); i++) {
+ if (pmu_metrics_table__for_each_metric(tables[i],
+ metricgroup__has_metric_or_groups_callback,
+ &data))
+ return true;
+ }
+ return false;
}
static int metricgroup__topdown_max_level_callback(const struct pmu_metric *pm,
--
2.51.1.821.gb6fe4d2222-googOn Fri, Oct 24, 2025 at 10:58:43AM -0700, Ian Rogers wrote:
> Add support to getting a common set of metrics from a default
> table. It simplifies the generation to add json metrics at the same
> time. The metrics added are CPUs_utilized, cs_per_second,
> migrations_per_second, page_faults_per_second, insn_per_cycle,
> stalled_cycles_per_instruction, frontend_cycles_idle,
> backend_cycles_idle, cycles_frequency, branch_frequency and
> branch_miss_rate based on the shadow metric definitions.
>
> Following this change the default perf stat output on an alderlake looks like:
> ```
> $ perf stat -a -- sleep 1
>
> Performance counter stats for 'system wide':
>
> 28,165,735,434 cpu-clock # 27.973 CPUs utilized
> 23,220 context-switches # 824.406 /sec
> 833 cpu-migrations # 29.575 /sec
> 35,293 page-faults # 1.253 K/sec
> 997,341,554 cpu_atom/instructions/ # 0.84 insn per cycle (35.63%)
> 11,197,053,736 cpu_core/instructions/ # 1.97 insn per cycle (58.21%)
> 1,184,871,493 cpu_atom/cycles/ # 0.042 GHz (35.64%)
> 5,676,692,769 cpu_core/cycles/ # 0.202 GHz (58.22%)
> 150,525,309 cpu_atom/branches/ # 5.344 M/sec (42.80%)
> 2,277,232,030 cpu_core/branches/ # 80.851 M/sec (58.21%)
> 5,248,575 cpu_atom/branch-misses/ # 3.49% of all branches (42.82%)
> 28,829,930 cpu_core/branch-misses/ # 1.27% of all branches (58.22%)
> (software) # 824.4 cs/sec cs_per_second
> TopdownL1 (cpu_core) # 12.6 % tma_bad_speculation
> # 28.8 % tma_frontend_bound (66.57%)
> TopdownL1 (cpu_core) # 25.8 % tma_backend_bound
> # 32.8 % tma_retiring (66.57%)
> (software) # 1253.1 faults/sec page_faults_per_second
> # 0.0 GHz cycles_frequency (42.80%)
> # 0.2 GHz cycles_frequency (74.92%)
> TopdownL1 (cpu_atom) # 22.3 % tma_bad_speculation
> # 17.2 % tma_retiring (49.95%)
> TopdownL1 (cpu_atom) # 30.6 % tma_backend_bound
> # 29.8 % tma_frontend_bound (49.94%)
> (cpu_atom) # 6.9 K/sec branch_frequency (42.89%)
> # 80.5 K/sec branch_frequency (74.93%)
> # 29.6 migrations/sec migrations_per_second
> # 28.0 CPUs CPUs_utilized
> (cpu_atom) # 0.8 instructions insn_per_cycle (42.91%)
> # 2.0 instructions insn_per_cycle (75.14%)
> (cpu_atom) # 3.8 % branch_miss_rate (35.75%)
> # 1.2 % branch_miss_rate (66.86%)
>
> 1.007063529 seconds time elapsed
> ```
>
> Signed-off-by: Ian Rogers <irogers@google.com>
> ---
> .../arch/common/common/metrics.json | 86 +++++++++++++
> tools/perf/pmu-events/empty-pmu-events.c | 115 +++++++++++++-----
> tools/perf/pmu-events/jevents.py | 21 +++-
> tools/perf/pmu-events/pmu-events.h | 1 +
> tools/perf/util/metricgroup.c | 31 +++--
> 5 files changed, 212 insertions(+), 42 deletions(-)
> create mode 100644 tools/perf/pmu-events/arch/common/common/metrics.json
>
> diff --git a/tools/perf/pmu-events/arch/common/common/metrics.json b/tools/perf/pmu-events/arch/common/common/metrics.json
> new file mode 100644
> index 000000000000..d1e37db18dc6
> --- /dev/null
> +++ b/tools/perf/pmu-events/arch/common/common/metrics.json
> @@ -0,0 +1,86 @@
> +[
> + {
> + "BriefDescription": "Average CPU utilization",
> + "MetricExpr": "(software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@) / (duration_time * 1e9)",
> + "MetricGroup": "Default",
> + "MetricName": "CPUs_utilized",
> + "ScaleUnit": "1CPUs",
> + "MetricConstraint": "NO_GROUP_EVENTS"
> + },
> + {
> + "BriefDescription": "Context switches per CPU second",
> + "MetricExpr": "(software@context\\-switches\\,name\\=context\\-switches@ * 1e9) / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)",
> + "MetricGroup": "Default",
> + "MetricName": "cs_per_second",
> + "ScaleUnit": "1cs/sec",
> + "MetricConstraint": "NO_GROUP_EVENTS"
> + },
> + {
> + "BriefDescription": "Process migrations to a new CPU per CPU second",
> + "MetricExpr": "(software@cpu\\-migrations\\,name\\=cpu\\-migrations@ * 1e9) / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)",
> + "MetricGroup": "Default",
> + "MetricName": "migrations_per_second",
> + "ScaleUnit": "1migrations/sec",
> + "MetricConstraint": "NO_GROUP_EVENTS"
> + },
> + {
> + "BriefDescription": "Page faults per CPU second",
> + "MetricExpr": "(software@page\\-faults\\,name\\=page\\-faults@ * 1e9) / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)",
> + "MetricGroup": "Default",
> + "MetricName": "page_faults_per_second",
> + "ScaleUnit": "1faults/sec",
> + "MetricConstraint": "NO_GROUP_EVENTS"
> + },
> + {
> + "BriefDescription": "Instructions Per Cycle",
> + "MetricExpr": "instructions / cpu\\-cycles",
> + "MetricGroup": "Default",
> + "MetricName": "insn_per_cycle",
> + "MetricThreshold": "insn_per_cycle < 1",
> + "ScaleUnit": "1instructions"
> + },
> + {
> + "BriefDescription": "Max front or backend stalls per instruction",
> + "MetricExpr": "max(stalled\\-cycles\\-frontend, stalled\\-cycles\\-backend) / instructions",
> + "MetricGroup": "Default",
> + "MetricName": "stalled_cycles_per_instruction"
> + },
> + {
> + "BriefDescription": "Frontend stalls per cycle",
> + "MetricExpr": "stalled\\-cycles\\-frontend / cpu\\-cycles",
> + "MetricGroup": "Default",
> + "MetricName": "frontend_cycles_idle",
> + "MetricThreshold": "frontend_cycles_idle > 0.1"
> + },
> + {
> + "BriefDescription": "Backend stalls per cycle",
> + "MetricExpr": "stalled\\-cycles\\-backend / cpu\\-cycles",
> + "MetricGroup": "Default",
> + "MetricName": "backend_cycles_idle",
> + "MetricThreshold": "backend_cycles_idle > 0.2"
> + },
> + {
> + "BriefDescription": "Cycles per CPU second",
> + "MetricExpr": "cpu\\-cycles / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)",
> + "MetricGroup": "Default",
> + "MetricName": "cycles_frequency",
> + "ScaleUnit": "1GHz",
> + "MetricConstraint": "NO_GROUP_EVENTS"
> + },
> + {
> + "BriefDescription": "Branches per CPU second",
> + "MetricExpr": "branches / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)",
> + "MetricGroup": "Default",
> + "MetricName": "branch_frequency",
> + "ScaleUnit": "1000K/sec",
Wouldn't it be "1000M/sec" ?
> + "MetricConstraint": "NO_GROUP_EVENTS"
> + },
> + {
> + "BriefDescription": "Branch miss rate",
> + "MetricExpr": "branch\\-misses / branches",
> + "MetricGroup": "Default",
> + "MetricName": "branch_miss_rate",
> + "MetricThreshold": "branch_miss_rate > 0.05",
Is MetricThreshold evaluated before scaling?
Thanks,
Namhyung
> + "ScaleUnit": "100%"
> + }
> +]
On Wed, Nov 5, 2025 at 10:22 PM Namhyung Kim <namhyung@kernel.org> wrote:
>
> On Fri, Oct 24, 2025 at 10:58:43AM -0700, Ian Rogers wrote:
> > Add support to getting a common set of metrics from a default
> > table. It simplifies the generation to add json metrics at the same
> > time. The metrics added are CPUs_utilized, cs_per_second,
> > migrations_per_second, page_faults_per_second, insn_per_cycle,
> > stalled_cycles_per_instruction, frontend_cycles_idle,
> > backend_cycles_idle, cycles_frequency, branch_frequency and
> > branch_miss_rate based on the shadow metric definitions.
> >
> > Following this change the default perf stat output on an alderlake looks like:
> > ```
> > $ perf stat -a -- sleep 1
> >
> > Performance counter stats for 'system wide':
> >
> > 28,165,735,434 cpu-clock # 27.973 CPUs utilized
> > 23,220 context-switches # 824.406 /sec
> > 833 cpu-migrations # 29.575 /sec
> > 35,293 page-faults # 1.253 K/sec
> > 997,341,554 cpu_atom/instructions/ # 0.84 insn per cycle (35.63%)
> > 11,197,053,736 cpu_core/instructions/ # 1.97 insn per cycle (58.21%)
> > 1,184,871,493 cpu_atom/cycles/ # 0.042 GHz (35.64%)
> > 5,676,692,769 cpu_core/cycles/ # 0.202 GHz (58.22%)
> > 150,525,309 cpu_atom/branches/ # 5.344 M/sec (42.80%)
> > 2,277,232,030 cpu_core/branches/ # 80.851 M/sec (58.21%)
> > 5,248,575 cpu_atom/branch-misses/ # 3.49% of all branches (42.82%)
> > 28,829,930 cpu_core/branch-misses/ # 1.27% of all branches (58.22%)
> > (software) # 824.4 cs/sec cs_per_second
> > TopdownL1 (cpu_core) # 12.6 % tma_bad_speculation
> > # 28.8 % tma_frontend_bound (66.57%)
> > TopdownL1 (cpu_core) # 25.8 % tma_backend_bound
> > # 32.8 % tma_retiring (66.57%)
> > (software) # 1253.1 faults/sec page_faults_per_second
> > # 0.0 GHz cycles_frequency (42.80%)
> > # 0.2 GHz cycles_frequency (74.92%)
> > TopdownL1 (cpu_atom) # 22.3 % tma_bad_speculation
> > # 17.2 % tma_retiring (49.95%)
> > TopdownL1 (cpu_atom) # 30.6 % tma_backend_bound
> > # 29.8 % tma_frontend_bound (49.94%)
> > (cpu_atom) # 6.9 K/sec branch_frequency (42.89%)
> > # 80.5 K/sec branch_frequency (74.93%)
> > # 29.6 migrations/sec migrations_per_second
> > # 28.0 CPUs CPUs_utilized
> > (cpu_atom) # 0.8 instructions insn_per_cycle (42.91%)
> > # 2.0 instructions insn_per_cycle (75.14%)
> > (cpu_atom) # 3.8 % branch_miss_rate (35.75%)
> > # 1.2 % branch_miss_rate (66.86%)
> >
> > 1.007063529 seconds time elapsed
> > ```
> >
> > Signed-off-by: Ian Rogers <irogers@google.com>
> > ---
> > .../arch/common/common/metrics.json | 86 +++++++++++++
> > tools/perf/pmu-events/empty-pmu-events.c | 115 +++++++++++++-----
> > tools/perf/pmu-events/jevents.py | 21 +++-
> > tools/perf/pmu-events/pmu-events.h | 1 +
> > tools/perf/util/metricgroup.c | 31 +++--
> > 5 files changed, 212 insertions(+), 42 deletions(-)
> > create mode 100644 tools/perf/pmu-events/arch/common/common/metrics.json
> >
> > diff --git a/tools/perf/pmu-events/arch/common/common/metrics.json b/tools/perf/pmu-events/arch/common/common/metrics.json
> > new file mode 100644
> > index 000000000000..d1e37db18dc6
> > --- /dev/null
> > +++ b/tools/perf/pmu-events/arch/common/common/metrics.json
> > @@ -0,0 +1,86 @@
> > +[
> > + {
> > + "BriefDescription": "Average CPU utilization",
> > + "MetricExpr": "(software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@) / (duration_time * 1e9)",
> > + "MetricGroup": "Default",
> > + "MetricName": "CPUs_utilized",
> > + "ScaleUnit": "1CPUs",
> > + "MetricConstraint": "NO_GROUP_EVENTS"
> > + },
> > + {
> > + "BriefDescription": "Context switches per CPU second",
> > + "MetricExpr": "(software@context\\-switches\\,name\\=context\\-switches@ * 1e9) / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)",
> > + "MetricGroup": "Default",
> > + "MetricName": "cs_per_second",
> > + "ScaleUnit": "1cs/sec",
> > + "MetricConstraint": "NO_GROUP_EVENTS"
> > + },
> > + {
> > + "BriefDescription": "Process migrations to a new CPU per CPU second",
> > + "MetricExpr": "(software@cpu\\-migrations\\,name\\=cpu\\-migrations@ * 1e9) / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)",
> > + "MetricGroup": "Default",
> > + "MetricName": "migrations_per_second",
> > + "ScaleUnit": "1migrations/sec",
> > + "MetricConstraint": "NO_GROUP_EVENTS"
> > + },
> > + {
> > + "BriefDescription": "Page faults per CPU second",
> > + "MetricExpr": "(software@page\\-faults\\,name\\=page\\-faults@ * 1e9) / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)",
> > + "MetricGroup": "Default",
> > + "MetricName": "page_faults_per_second",
> > + "ScaleUnit": "1faults/sec",
> > + "MetricConstraint": "NO_GROUP_EVENTS"
> > + },
> > + {
> > + "BriefDescription": "Instructions Per Cycle",
> > + "MetricExpr": "instructions / cpu\\-cycles",
> > + "MetricGroup": "Default",
> > + "MetricName": "insn_per_cycle",
> > + "MetricThreshold": "insn_per_cycle < 1",
> > + "ScaleUnit": "1instructions"
> > + },
> > + {
> > + "BriefDescription": "Max front or backend stalls per instruction",
> > + "MetricExpr": "max(stalled\\-cycles\\-frontend, stalled\\-cycles\\-backend) / instructions",
> > + "MetricGroup": "Default",
> > + "MetricName": "stalled_cycles_per_instruction"
> > + },
> > + {
> > + "BriefDescription": "Frontend stalls per cycle",
> > + "MetricExpr": "stalled\\-cycles\\-frontend / cpu\\-cycles",
> > + "MetricGroup": "Default",
> > + "MetricName": "frontend_cycles_idle",
> > + "MetricThreshold": "frontend_cycles_idle > 0.1"
> > + },
> > + {
> > + "BriefDescription": "Backend stalls per cycle",
> > + "MetricExpr": "stalled\\-cycles\\-backend / cpu\\-cycles",
> > + "MetricGroup": "Default",
> > + "MetricName": "backend_cycles_idle",
> > + "MetricThreshold": "backend_cycles_idle > 0.2"
> > + },
> > + {
> > + "BriefDescription": "Cycles per CPU second",
> > + "MetricExpr": "cpu\\-cycles / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)",
> > + "MetricGroup": "Default",
> > + "MetricName": "cycles_frequency",
> > + "ScaleUnit": "1GHz",
> > + "MetricConstraint": "NO_GROUP_EVENTS"
> > + },
> > + {
> > + "BriefDescription": "Branches per CPU second",
> > + "MetricExpr": "branches / (software@cpu\\-clock\\,name\\=cpu\\-clock@ if #target_cpu else software@task\\-clock\\,name\\=task\\-clock@)",
> > + "MetricGroup": "Default",
> > + "MetricName": "branch_frequency",
> > + "ScaleUnit": "1000K/sec",
>
> Wouldn't it be "1000M/sec" ?
Agreed. Will fix in v2. The existing logic does multiple by 1e9 in one
place and then divide by 1e3 in another. It would be good if we could
do better units, based on metric value, but I'll leave that for
another day.
> > + "MetricConstraint": "NO_GROUP_EVENTS"
> > + },
> > + {
> > + "BriefDescription": "Branch miss rate",
> > + "MetricExpr": "branch\\-misses / branches",
> > + "MetricGroup": "Default",
> > + "MetricName": "branch_miss_rate",
> > + "MetricThreshold": "branch_miss_rate > 0.05",
>
> Is MetricThreshold evaluated before scaling?
Yep. Primarily to help share most of the events/calculation with the
metric being created. Fwiw, the 5% here comes from the existing
stat-shadow metric threshold.
Thanks,
Ian
> Thanks,
> Namhyung
>
>
> > + "ScaleUnit": "100%"
> > + }
> > +]
© 2016 - 2026 Red Hat, Inc.