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b18f3e3650
Add generic support for standalone metrics specified in JSON files to
perf stat. A metric is a formula that uses multiple events to compute a
higher level result (e.g. IPC).
Previously metrics were always tied to an event and automatically
enabled with that event. But now change it that we can have standalone
metrics. They are in the same JSON data structure as events, but don't
have an event name.
We also allow to organize the metrics in metric groups, which allows a
short cut to select several related metrics at once.
Add a new -M / --metrics option to perf stat that adds the metrics or
metric groups specified.
Add the core code to manage and parse the metric groups. They are
collected from the JSON data structures into a separate rblist. When
computing shadow values look for metrics in that list. Then they are
computed using the existing saved values infrastructure in stat-shadow.c
The actual JSON metrics are in a separate pull request.
% perf stat -M Summary --metric-only -a sleep 1
Performance counter stats for 'system wide':
Instructions CLKS CPU_Utilization GFLOPs SMT_2T_Utilization Kernel_Utilization
317614222.0 1392930775.0 0.0 0.0 0.2 0.1
1.001497549 seconds time elapsed
% perf stat -M GFLOPs flops
Performance counter stats for 'flops':
3,999,541,471 fp_comp_ops_exe.sse_scalar_single # 1.2 GFLOPs (66.65%)
14 fp_comp_ops_exe.sse_scalar_double (66.65%)
0 fp_comp_ops_exe.sse_packed_double (66.67%)
0 fp_comp_ops_exe.sse_packed_single (66.70%)
0 simd_fp_256.packed_double (66.70%)
0 simd_fp_256.packed_single (66.67%)
0 duration_time
3.238372845 seconds time elapsed
v2: Add missing header file
v3: Move find_map to pmu.c
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20170831194036.30146-7-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
118 lines
3.0 KiB
C
118 lines
3.0 KiB
C
#ifndef __PERF_STATS_H
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#define __PERF_STATS_H
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#include <linux/types.h>
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#include <stdio.h>
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#include "xyarray.h"
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struct stats
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{
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double n, mean, M2;
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u64 max, min;
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};
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enum perf_stat_evsel_id {
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PERF_STAT_EVSEL_ID__NONE = 0,
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PERF_STAT_EVSEL_ID__CYCLES_IN_TX,
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PERF_STAT_EVSEL_ID__TRANSACTION_START,
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PERF_STAT_EVSEL_ID__ELISION_START,
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PERF_STAT_EVSEL_ID__CYCLES_IN_TX_CP,
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PERF_STAT_EVSEL_ID__TOPDOWN_TOTAL_SLOTS,
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PERF_STAT_EVSEL_ID__TOPDOWN_SLOTS_ISSUED,
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PERF_STAT_EVSEL_ID__TOPDOWN_SLOTS_RETIRED,
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PERF_STAT_EVSEL_ID__TOPDOWN_FETCH_BUBBLES,
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PERF_STAT_EVSEL_ID__TOPDOWN_RECOVERY_BUBBLES,
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PERF_STAT_EVSEL_ID__SMI_NUM,
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PERF_STAT_EVSEL_ID__APERF,
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PERF_STAT_EVSEL_ID__MAX,
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};
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struct perf_stat_evsel {
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struct stats res_stats[3];
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enum perf_stat_evsel_id id;
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u64 *group_data;
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};
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enum aggr_mode {
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AGGR_NONE,
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AGGR_GLOBAL,
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AGGR_SOCKET,
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AGGR_CORE,
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AGGR_THREAD,
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AGGR_UNSET,
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};
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struct perf_stat_config {
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enum aggr_mode aggr_mode;
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bool scale;
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FILE *output;
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unsigned int interval;
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};
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void update_stats(struct stats *stats, u64 val);
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double avg_stats(struct stats *stats);
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double stddev_stats(struct stats *stats);
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double rel_stddev_stats(double stddev, double avg);
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static inline void init_stats(struct stats *stats)
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{
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stats->n = 0.0;
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stats->mean = 0.0;
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stats->M2 = 0.0;
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stats->min = (u64) -1;
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stats->max = 0;
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}
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struct perf_evsel;
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struct perf_evlist;
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bool __perf_evsel_stat__is(struct perf_evsel *evsel,
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enum perf_stat_evsel_id id);
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#define perf_stat_evsel__is(evsel, id) \
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__perf_evsel_stat__is(evsel, PERF_STAT_EVSEL_ID__ ## id)
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void perf_stat_evsel_id_init(struct perf_evsel *evsel);
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extern struct stats walltime_nsecs_stats;
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typedef void (*print_metric_t)(void *ctx, const char *color, const char *unit,
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const char *fmt, double val);
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typedef void (*new_line_t )(void *ctx);
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void perf_stat__init_shadow_stats(void);
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void perf_stat__reset_shadow_stats(void);
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void perf_stat__update_shadow_stats(struct perf_evsel *counter, u64 *count,
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int cpu);
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struct perf_stat_output_ctx {
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void *ctx;
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print_metric_t print_metric;
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new_line_t new_line;
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bool force_header;
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};
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struct rblist;
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void perf_stat__print_shadow_stats(struct perf_evsel *evsel,
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double avg, int cpu,
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struct perf_stat_output_ctx *out,
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struct rblist *metric_events);
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void perf_stat__collect_metric_expr(struct perf_evlist *);
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int perf_evlist__alloc_stats(struct perf_evlist *evlist, bool alloc_raw);
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void perf_evlist__free_stats(struct perf_evlist *evlist);
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void perf_evlist__reset_stats(struct perf_evlist *evlist);
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int perf_stat_process_counter(struct perf_stat_config *config,
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struct perf_evsel *counter);
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struct perf_tool;
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union perf_event;
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struct perf_session;
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int perf_event__process_stat_event(struct perf_tool *tool,
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union perf_event *event,
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struct perf_session *session);
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size_t perf_event__fprintf_stat(union perf_event *event, FILE *fp);
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size_t perf_event__fprintf_stat_round(union perf_event *event, FILE *fp);
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size_t perf_event__fprintf_stat_config(union perf_event *event, FILE *fp);
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#endif
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