[PATCH v1 13/20] perf jevents: Add cycles breakdown metric for Intel

Ian Rogers
2024-02-29T00:18:54Z

Breakdown cycles to user, kernel and guest.

Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/perf/pmu-events/intel_metrics.py | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)

diff --git a/tools/perf/pmu-events/intel_metrics.py b/tools/perf/pmu-events/intel_metrics.py
index dae44d296861..fef40969a4b8 100755
--- a/tools/perf/pmu-events/intel_metrics.py
+++ b/tools/perf/pmu-events/intel_metrics.py
@@ -26,6 +26,23 @@ core_cycles = Event("CPU_CLK_UNHALTED.THREAD_P_ANY",
smt_cycles = Select(core_cycles / 2, Literal("#smt_on"), core_cycles)

+def Cycles() -> MetricGroup:
+ cyc_k = Event("cycles:kHh")
+ cyc_g = Event("cycles:G")
+ cyc_u = Event("cycles:uH")
+ cyc = cyc_k + cyc_g + cyc_u
+
+ return MetricGroup("cycles", [
+ Metric("cycles_total", "Total number of cycles", cyc, "cycles"),
+ Metric("cycles_user", "User cycles as a percentage of all cycles",
+ d_ratio(cyc_u, cyc), "100%"),
+ Metric("cycles_kernel", "Kernel cycles as a percentage of all cycles",
+ d_ratio(cyc_k, cyc), "100%"),
+ Metric("cycles_guest", "Hypervisor guest cycles as a percentage of all cycles",
+ d_ratio(cyc_g, cyc), "100%"),
+ ], description = "cycles breakdown per privilege level (users, kernel, guest)")
+
+
def Idle() -> Metric:
cyc = Event("msr/mperf/")
tsc = Event("msr/tsc/")
@@ -770,6 +787,7 @@ def IntelLdSt() -> Optional[MetricGroup]:

all_metrics = MetricGroup("", [
+ Cycles(),
Idle(),
Rapl(),
Smi(),
--
2.44.0.278.ge034bb2e1d-goog