[PATCH v1 06/13] perf jevents: Add hardware prefetch (hwpf) metric group for AMD

Ian Rogers
2024-02-29T00:15:57Z

Add metrics that give the utility of hardware prefetches on zen2, zen3
and zen4.

Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/perf/pmu-events/amd_metrics.py | 61 ++++++++++++++++++++++++++++
1 file changed, 61 insertions(+)

diff --git a/tools/perf/pmu-events/amd_metrics.py b/tools/perf/pmu-events/amd_metrics.py
index 52451bcb4bbf..dda904998269 100755
--- a/tools/perf/pmu-events/amd_metrics.py
+++ b/tools/perf/pmu-events/amd_metrics.py
@@ -125,6 +125,66 @@ def AmdBr():
description="breakdown of retired branch instructions")

+def AmdHwpf():
+ """Returns a MetricGroup representing AMD hardware prefetch metrics."""
+ if zen_model <= 1:
+ return None
+
+ hwp_ld = Event("ls_dispatch.ld_dispatch")
+ hwp_l2 = Event("ls_hw_pf_dc_fills.local_l2",
+ "ls_hw_pf_dc_fills.lcl_l2",
+ "ls_hw_pf_dc_fill.ls_mabresp_lcl_l2")
+ hwp_lc = Event("ls_hw_pf_dc_fills.local_ccx",
+ "ls_hw_pf_dc_fills.int_cache",
+ "ls_hw_pf_dc_fill.ls_mabresp_lcl_cache")
+ hwp_lm = Event("ls_hw_pf_dc_fills.dram_io_near",
+ "ls_hw_pf_dc_fills.mem_io_local",
+ "ls_hw_pf_dc_fill.ls_mabresp_lcl_dram")
+ hwp_rc = Event("ls_hw_pf_dc_fills.far_cache",
+ "ls_hw_pf_dc_fills.ext_cache_remote",
+ "ls_hw_pf_dc_fill.ls_mabresp_rmt_cache")
+ hwp_rm = Event("ls_hw_pf_dc_fills.dram_io_far",
+ "ls_hw_pf_dc_fills.mem_io_remote",
+ "ls_hw_pf_dc_fill.ls_mabresp_rmt_dram")
+
+ loc_pf = hwp_l2 + hwp_lc + hwp_lm
+ rem_pf = hwp_rc + hwp_rm
+ all_pf = loc_pf + rem_pf
+
+ r1 = d_ratio(ins, all_pf)
+ r2 = d_ratio(hwp_ld, all_pf)
+ r3 = d_ratio(all_pf, interval_sec)
+
+ overview = MetricGroup("hwpf_overview", [
+ Metric("hwpf_ov_insn_bt_hwpf", "Insn between HWPF", r1, "insns"),
+ Metric("hwpf_ov_loads_bt_hwpf", "Loads between HWPF", r2, "loads"),
+ Metric("hwpf_ov_rate", "HWPF per second", r3, "hwpf/s"),
+ ])
+ r1 = d_ratio(hwp_l2, all_pf)
+ r2 = d_ratio(hwp_lc, all_pf)
+ r3 = d_ratio(hwp_lm, all_pf)
+ data_src_local = MetricGroup("hwpf_data_src_local", [
+ Metric("hwpf_data_src_local_l2", "Data source local l2", r1, "100%"),
+ Metric("hwpf_data_src_local_ccx_l3_loc_ccx",
+ "Data source local ccx l3 loc ccx", r2, "100%"),
+ Metric("hwpf_data_src_local_memory_or_io",
+ "Data source local memory or IO", r3, "100%"),
+ ])
+
+ r1 = d_ratio(hwp_rc, all_pf)
+ r2 = d_ratio(hwp_rm, all_pf)
+ data_src_remote = MetricGroup("hwpf_data_src_remote", [
+ Metric("hwpf_data_src_remote_cache", "Data source remote cache", r1,
+ "100%"),
+ Metric("hwpf_data_src_remote_memory_or_io",
+ "Data source remote memory or IO", r2, "100%"),
+ ])
+
+ data_src = MetricGroup("hwpf_data_src", [data_src_local, data_src_remote])
+ return MetricGroup("hwpf", [overview, data_src],
+ description="Hardware prefetch breakdown (CCX L3 = L3 of current thread, Loc CCX = CCX cache on some socket)")
+
+
def AmdSwpf() -> Optional[MetricGroup]:
"""Returns a MetricGroup representing AMD software prefetch metrics."""
if zen_model <= 1:
@@ -256,6 +316,7 @@ def Rapl() -> MetricGroup:

all_metrics = MetricGroup("", [
AmdBr(),
+ AmdHwpf(),
AmdSwpf(),
AmdUpc(),
Idle(),
--
2.44.0.278.ge034bb2e1d-goog