Messages in this thread Patch in this message | | | Date | Wed, 13 Mar 2024 22:58:32 -0700 | Subject | [PATCH v3 05/12] perf jevents: Add software prefetch (swpf) metric group for AMD | From | Ian Rogers <> |
| |
Add metrics that give the utility of software prefetches on zen2, zen3 and zen4.
Signed-off-by: Ian Rogers <irogers@google.com> --- tools/perf/pmu-events/amd_metrics.py | 96 ++++++++++++++++++++++++++++ 1 file changed, 96 insertions(+)
diff --git a/tools/perf/pmu-events/amd_metrics.py b/tools/perf/pmu-events/amd_metrics.py index 90545d4862a6..9551b44dbbaf 100755 --- a/tools/perf/pmu-events/amd_metrics.py +++ b/tools/perf/pmu-events/amd_metrics.py @@ -120,6 +120,101 @@ def AmdBr(): description="breakdown of retired branch instructions") +def AmdSwpf() -> Optional[MetricGroup]: + """Returns a MetricGroup representing AMD software prefetch metrics.""" + global _zen_model + if _zen_model <= 1: + return None + + swp_ld = Event("ls_dispatch.ld_dispatch") + swp_t0 = Event("ls_pref_instr_disp.prefetch") + swp_w = Event("ls_pref_instr_disp.prefetch_w") # Missing on Zen1 + swp_nt = Event("ls_pref_instr_disp.prefetch_nta") + swp_mab = Event("ls_inef_sw_pref.mab_mch_cnt") + swp_l2 = Event("ls_sw_pf_dc_fills.local_l2", + "ls_sw_pf_dc_fills.lcl_l2", + "ls_sw_pf_dc_fill.ls_mabresp_lcl_l2") + swp_lc = Event("ls_sw_pf_dc_fills.local_ccx", + "ls_sw_pf_dc_fills.int_cache", + "ls_sw_pf_dc_fill.ls_mabresp_lcl_cache") + swp_lm = Event("ls_sw_pf_dc_fills.dram_io_near", + "ls_sw_pf_dc_fills.mem_io_local", + "ls_sw_pf_dc_fill.ls_mabresp_lcl_dram") + swp_rc = Event("ls_sw_pf_dc_fills.far_cache", + "ls_sw_pf_dc_fills.ext_cache_remote", + "ls_sw_pf_dc_fill.ls_mabresp_rmt_cache") + swp_rm = Event("ls_sw_pf_dc_fills.dram_io_far", + "ls_sw_pf_dc_fills.mem_io_remote", + "ls_sw_pf_dc_fill.ls_mabresp_rmt_dram") + + # All the swpf that were satisfied beyond L1D are good. + all_pf = swp_t0 + swp_w + swp_nt + good_pf = swp_l2 + swp_lc + swp_lm + swp_rc + swp_rm + bad_pf = max(all_pf - good_pf, 0) + + loc_pf = swp_l2 + swp_lc + swp_lm + rem_pf = swp_rc + swp_rm + + req_pend = max(0, bad_pf - swp_mab) + + r1 = d_ratio(ins, all_pf) + r2 = d_ratio(swp_ld, all_pf) + r3 = d_ratio(swp_t0, interval_sec) + r4 = d_ratio(swp_w, interval_sec) + r5 = d_ratio(swp_nt, interval_sec) + overview = MetricGroup("swpf_overview", [ + Metric("swpf_ov_insn_bt_swpf", "Insn between SWPF", r1, "insns"), + Metric("swpf_ov_loads_bt_swpf", "Loads between SWPF", r2, "loads"), + Metric("swpf_ov_rate_prefetch_t0_t1_t2", "Rate prefetch TO_T1_T2", r3, + "insns/sec"), + Metric("swpf_ov_rate_prefetch_w", "Rate prefetch W", r4, "insns/sec"), + Metric("swpf_ov_rate_preftech_nta", "Rate prefetch NTA", r5, "insns/sec"), + ]) + + r1 = d_ratio(swp_mab, all_pf) + r2 = d_ratio(req_pend, all_pf) + usefulness_bad = MetricGroup("swpf_usefulness_bad", [ + Metric("swpf_use_bad_hit_l1", "Usefulness bad hit L1", r1, "100%"), + Metric("swpf_use_bad_req_pend", "Usefulness bad req pending", r2, "100%"), + ]) + + r1 = d_ratio(good_pf, all_pf) + usefulness_good = MetricGroup("swpf_usefulness_good", [ + Metric("swpf_use_good_other_src", "Usefulness good other src", r1, + "100%"), + ]) + + usefulness = MetricGroup("swpf_usefulness", [ + usefulness_bad, + usefulness_good, + ]) + + r1 = d_ratio(swp_l2, good_pf) + r2 = d_ratio(swp_lc, good_pf) + r3 = d_ratio(swp_lm, good_pf) + data_src_local = MetricGroup("swpf_data_src_local", [ + Metric("swpf_data_src_local_l2", "Data source local l2", r1, "100%"), + Metric("swpf_data_src_local_ccx_l3_loc_ccx", + "Data source local ccx l3 loc ccx", r2, "100%"), + Metric("swpf_data_src_local_memory_or_io", + "Data source local memory or IO", r3, "100%"), + ]) + + r1 = d_ratio(swp_rc, good_pf) + r2 = d_ratio(swp_rm, good_pf) + data_src_remote = MetricGroup("swpf_data_src_remote", [ + Metric("swpf_data_src_remote_cache", "Data source remote cache", r1, + "100%"), + Metric("swpf_data_src_remote_memory_or_io", + "Data source remote memory or IO", r2, "100%"), + ]) + + data_src = MetricGroup("swpf_data_src", [data_src_local, data_src_remote]) + + return MetricGroup("swpf", [overview, usefulness, data_src], + description="Sofware prefetch breakdown (CCX L3 = L3 of current thread, Loc CCX = CCX cache on some socket)") + + def AmdUpc() -> Metric: ops = Event("ex_ret_ops", "ex_ret_cops") upc = d_ratio(ops, smt_cycles) @@ -183,6 +278,7 @@ def main() -> None: all_metrics = MetricGroup("", [ AmdBr(), + AmdSwpf(), AmdUpc(), Idle(), Rapl(), -- 2.44.0.278.ge034bb2e1d-goog
| |