diff options
Diffstat (limited to 'src/plugins/perfmon/intel/bundle/topdown_icelake.c')
| -rw-r--r-- | src/plugins/perfmon/intel/bundle/topdown_icelake.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/src/plugins/perfmon/intel/bundle/topdown_icelake.c b/src/plugins/perfmon/intel/bundle/topdown_icelake.c new file mode 100644 index 00000000000..a3392e52f0a --- /dev/null +++ b/src/plugins/perfmon/intel/bundle/topdown_icelake.c @@ -0,0 +1,176 @@ +/* + * Copyright (c) 2022 Intel and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#include <perfmon/perfmon.h> +#include <perfmon/intel/core.h> + +static int +is_icelake () +{ + return clib_cpu_supports_avx512_bitalg () && !clib_cpu_supports_movdir64b (); +} + +static perfmon_cpu_supports_t topdown_lvl2_cpu_supports_icx[] = { + { is_icelake, PERFMON_BUNDLE_TYPE_THREAD } +}; + +#define GET_METRIC(m, i) (f64) (((m) >> (i * 8)) & 0xff) + +enum +{ + TD_SLOTS = 0, + STALLS_MEM_ANY, + STALLS_TOTAL, + BOUND_ON_STORES, + RECOVERY_CYCLES, + UOP_DROPPING, + UOP_NOT_DELIVERED, + TD_RETIRING, + TD_BAD_SPEC, + TD_FE_BOUND, + TD_BE_BOUND, +}; + +static_always_inline f64 +memory_bound_fraction (perfmon_reading_t *ss) +{ + return (ss->value[STALLS_MEM_ANY] + ss->value[BOUND_ON_STORES]) / + (f64) (ss->value[STALLS_TOTAL] + ss->value[BOUND_ON_STORES]); +} + +static_always_inline f64 +perf_metrics_sum (perfmon_reading_t *ss) +{ + return ss->value[TD_RETIRING] + ss->value[TD_BAD_SPEC] + + ss->value[TD_FE_BOUND] + ss->value[TD_BE_BOUND]; +} + +static_always_inline f64 +retiring (perfmon_reading_t *ss) +{ + return ss->value[TD_RETIRING] / perf_metrics_sum (ss); +} + +static_always_inline f64 +bad_speculation (perfmon_reading_t *ss) +{ + return ss->value[TD_BAD_SPEC] / perf_metrics_sum (ss); +} + +static_always_inline f64 +frontend_bound (perfmon_reading_t *ss) +{ + return (ss->value[TD_FE_BOUND] / perf_metrics_sum (ss)) - + (ss->value[UOP_DROPPING] / perf_metrics_sum (ss)); +} + +static_always_inline f64 +backend_bound (perfmon_reading_t *ss) +{ + return (ss->value[TD_BE_BOUND] / perf_metrics_sum (ss)) + + ((5 * ss->value[RECOVERY_CYCLES]) / perf_metrics_sum (ss)); +} + +static_always_inline f64 +fetch_latency (perfmon_reading_t *ss) +{ + f64 r = ((5 * ss->value[UOP_NOT_DELIVERED] - ss->value[UOP_DROPPING]) / + (f64) ss->value[TD_SLOTS]); + return r; +} + +static_always_inline f64 +fetch_bandwidth (perfmon_reading_t *ss) +{ + return clib_max (0, frontend_bound (ss) - fetch_latency (ss)); +} + +static_always_inline f64 +memory_bound (perfmon_reading_t *ss) +{ + return backend_bound (ss) * memory_bound_fraction (ss); +} + +static_always_inline f64 +core_bound (perfmon_reading_t *ss) +{ + return backend_bound (ss) - memory_bound (ss); +} + +static u8 * +format_topdown_lvl2_icx (u8 *s, va_list *args) +{ + perfmon_reading_t *ss = va_arg (*args, perfmon_reading_t *); + u64 idx = va_arg (*args, int); + f64 sv = 0; + + switch (idx) + { + case 0: + sv = retiring (ss); + break; + case 1: + sv = bad_speculation (ss); + break; + case 2: + sv = frontend_bound (ss); + break; + case 3: + sv = backend_bound (ss); + break; + case 4: + sv = fetch_latency (ss); + break; + case 5: + sv = fetch_bandwidth (ss); + break; + case 6: + sv = memory_bound (ss); + break; + case 7: + sv = core_bound (ss); + break; + } + + s = format (s, "%f", sv * 100); + + return s; +} + +PERFMON_REGISTER_BUNDLE (topdown_lvl2_metric_icx) = { + .name = "topdown", + .description = "Top-down Microarchitecture Analysis Level 1 & 2", + .source = "intel-core", + .events[0] = INTEL_CORE_E_TOPDOWN_SLOTS, + .events[1] = INTEL_CORE_E_CYCLE_ACTIVITY_STALLS_MEM_ANY, + .events[2] = INTEL_CORE_E_CYCLE_ACTIVITY_STALLS_TOTAL, + .events[3] = INTEL_CORE_E_EXE_ACTIVITY_BOUND_ON_STORES, + .events[4] = INTEL_CORE_E_INT_MISC_RECOVERY_CYCLES, + .events[5] = INTEL_CORE_E_INT_MISC_UOP_DROPPING, + .events[6] = INTEL_CORE_E_IDQ_UOPS_NOT_DELIVERED_CORE, + .events[7] = INTEL_CORE_E_TOPDOWN_L1_RETIRING_METRIC, + .events[8] = INTEL_CORE_E_TOPDOWN_L1_BAD_SPEC_METRIC, + .events[9] = INTEL_CORE_E_TOPDOWN_L1_FE_BOUND_METRIC, + .events[10] = INTEL_CORE_E_TOPDOWN_L1_BE_BOUND_METRIC, + .n_events = 11, + .cpu_supports = topdown_lvl2_cpu_supports_icx, + .n_cpu_supports = ARRAY_LEN (topdown_lvl2_cpu_supports_icx), + .format_fn = format_topdown_lvl2_icx, + .column_headers = PERFMON_STRINGS ("% RT", "% BS", "% FE", "% BE", "% FE.FL", + "% FE.FB", "% BE.MB", "% BE.CB"), + .footer = "Retiring (RT), Bad Speculation (BS),\n" + " FrontEnd bound (FE), BackEnd bound (BE),\n" + " Fetch Latency (FL), Fetch Bandwidth (FB),\n" + " Memory Bound (MB), Core Bound (CB)", +}; |