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/*
* Copyright (c) 2021 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 <vnet/vnet.h>
#include <perfmon/perfmon.h>
#include <perfmon/intel/core.h>
#define GET_METRIC(m, i) (((m) >> (i * 8)) & 0xff)
#define GET_RATIO(m, i) (((m) >> (i * 32)) & 0xffffffff)
#define RDPMC_FIXED_SLOTS (1 << 30) /* fixed slots */
#define RDPMC_L1_METRICS (1 << 29) /* l1 metric counters */
#define FIXED_COUNTER_SLOTS 3
#define METRIC_COUNTER_TOPDOWN_L1 0
typedef enum
{
TOPDOWN_E_METRIC_RETIRING = 0,
TOPDOWN_E_METRIC_BAD_SPEC,
TOPDOWN_E_METRIC_FE_BOUND,
TOPDOWN_E_METRIC_BE_BOUND,
} topdown_lvl1_counters_t;
enum
{
TOPDOWN_SLOTS = 0,
TOPDOWN_METRICS,
} topdown_lvl1_metrics_t;
static_always_inline f32
topdown_lvl1_parse_row (perfmon_node_stats_t *ns, topdown_lvl1_counters_t e)
{
f64 slots_t0 =
ns->t[0].value[TOPDOWN_SLOTS] *
((f64) GET_METRIC (ns->t[0].value[TOPDOWN_METRICS], e) / 0xff);
f64 slots_t1 =
ns->t[1].value[TOPDOWN_SLOTS] *
((f64) GET_METRIC (ns->t[1].value[TOPDOWN_METRICS], e) / 0xff);
u64 slots_delta =
ns->t[1].value[TOPDOWN_SLOTS] - ns->t[0].value[TOPDOWN_SLOTS];
slots_t1 = slots_t1 - slots_t0;
return (slots_t1 / slots_delta) * 100;
}
static u8 *
format_topdown_lvl1 (u8 *s, va_list *args)
{
perfmon_node_stats_t *st = va_arg (*args, perfmon_node_stats_t *);
u64 row = va_arg (*args, int);
switch (row)
{
case 0:
s = format (s, "%f",
topdown_lvl1_parse_row (st, TOPDOWN_E_METRIC_BAD_SPEC) +
topdown_lvl1_parse_row (st, TOPDOWN_E_METRIC_RETIRING));
break;
case 1:
s = format (s, "%f",
topdown_lvl1_parse_row (st, TOPDOWN_E_METRIC_BE_BOUND) +
topdown_lvl1_parse_row (st, TOPDOWN_E_METRIC_FE_BOUND));
break;
case 2:
s = format (s, "%f",
topdown_lvl1_parse_row (st, TOPDOWN_E_METRIC_RETIRING));
break;
case 3:
s = format (s, "%f",
topdown_lvl1_parse_row (st, TOPDOWN_E_METRIC_BAD_SPEC));
break;
case 4:
s = format (s, "%f",
topdown_lvl1_parse_row (st, TOPDOWN_E_METRIC_FE_BOUND));
break;
case 5:
s = format (s, "%f",
topdown_lvl1_parse_row (st, TOPDOWN_E_METRIC_BE_BOUND));
break;
}
return s;
}
PERFMON_REGISTER_BUNDLE (topdown_lvl1) = {
.name = "topdown-level1",
.description = "Top-down Microarchitecture Analysis Level 1",
.source = "intel-core",
.type = PERFMON_BUNDLE_TYPE_NODE,
.offset_type = PERFMON_OFFSET_TYPE_METRICS,
.events[0] = INTEL_CORE_E_TOPDOWN_SLOTS,
.events[1] = INTEL_CORE_E_TOPDOWN_L1_METRICS,
.metrics[0] = RDPMC_FIXED_SLOTS | FIXED_COUNTER_SLOTS,
.metrics[1] = RDPMC_L1_METRICS | METRIC_COUNTER_TOPDOWN_L1,
.n_events = 2,
.cpu_supports = clib_cpu_supports_avx512_bitalg,
.format_fn = format_topdown_lvl1,
.column_headers = PERFMON_STRINGS ("% NS", "% ST", "% NS.RT", "% NS.BS",
"% ST.FE", "% ST.BE"),
.footer = "Not Stalled (NS),STalled (ST),\n"
" Retiring (RT), Bad Speculation (BS),\n"
" FrontEnd bound (FE), BackEnd bound (BE)",
};
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