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![Andi Kleen](/assets/img/avatar_default.png)
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>
31 lines
741 B
C
31 lines
741 B
C
#ifndef METRICGROUP_H
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#define METRICGROUP_H 1
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#include "linux/list.h"
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#include "rblist.h"
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#include <subcmd/parse-options.h>
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#include "evlist.h"
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#include "strbuf.h"
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struct metric_event {
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struct rb_node nd;
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struct perf_evsel *evsel;
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struct list_head head; /* list of metric_expr */
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};
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struct metric_expr {
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struct list_head nd;
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const char *metric_expr;
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const char *metric_name;
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struct perf_evsel **metric_events;
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};
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struct metric_event *metricgroup__lookup(struct rblist *metric_events,
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struct perf_evsel *evsel,
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bool create);
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int metricgroup__parse_groups(const struct option *opt,
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const char *str,
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struct rblist *metric_events);
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void metricgroup__print(bool metrics, bool groups, char *filter, bool raw);
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#endif
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