1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
5 * Refactored from builtin-top.c, see that files for further copyright notes.
11 #include "parse-events.h"
17 #define SNPRINTF(buf, size, fmt, args...) \
19 size_t r = snprintf(buf, size, fmt, ## args); \
20 r > size ? size : r; \
23 size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size)
25 float samples_per_sec;
26 float ksamples_per_sec;
27 float esamples_percent;
28 struct record_opts *opts = &top->record_opts;
29 struct target *target = &opts->target;
33 samples_per_sec = top->samples / top->delay_secs;
34 ksamples_per_sec = top->kernel_samples / top->delay_secs;
35 esamples_percent = (100.0 * top->exact_samples) / top->samples;
37 samples_per_sec = ksamples_per_sec = esamples_percent = 0.0;
41 float ksamples_percent = 0.0;
44 ksamples_percent = (100.0 * ksamples_per_sec) /
46 ret = SNPRINTF(bf, size,
47 " PerfTop:%8.0f irqs/sec kernel:%4.1f%%"
48 " exact: %4.1f%% lost: %" PRIu64 "/%" PRIu64 " drop: %" PRIu64 "/%" PRIu64 " [",
49 samples_per_sec, ksamples_percent, esamples_percent,
50 top->lost, top->lost_total, top->drop, top->drop_total);
52 float us_samples_per_sec = top->us_samples / top->delay_secs;
53 float guest_kernel_samples_per_sec = top->guest_kernel_samples / top->delay_secs;
54 float guest_us_samples_per_sec = top->guest_us_samples / top->delay_secs;
56 ret = SNPRINTF(bf, size,
57 " PerfTop:%8.0f irqs/sec kernel:%4.1f%% us:%4.1f%%"
58 " guest kernel:%4.1f%% guest us:%4.1f%%"
59 " exact: %4.1f%% [", samples_per_sec,
60 100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
62 100.0 - (100.0 * ((samples_per_sec - us_samples_per_sec) /
64 100.0 - (100.0 * ((samples_per_sec -
65 guest_kernel_samples_per_sec) /
67 100.0 - (100.0 * ((samples_per_sec -
68 guest_us_samples_per_sec) /
73 if (top->evlist->core.nr_entries == 1) {
74 struct evsel *first = evlist__first(top->evlist);
75 ret += SNPRINTF(bf + ret, size - ret, "%" PRIu64 "%s ",
76 (uint64_t)first->core.attr.sample_period,
77 opts->freq ? "Hz" : "");
80 ret += SNPRINTF(bf + ret, size - ret, "%s", evsel__name(top->sym_evsel));
82 ret += SNPRINTF(bf + ret, size - ret, "], ");
85 ret += SNPRINTF(bf + ret, size - ret, " (target_pid: %s",
88 ret += SNPRINTF(bf + ret, size - ret, " (target_tid: %s",
90 else if (target->uid_str != NULL)
91 ret += SNPRINTF(bf + ret, size - ret, " (uid: %s",
94 ret += SNPRINTF(bf + ret, size - ret, " (all");
97 ret += SNPRINTF(bf + ret, size - ret, ", CPU%s: %s)",
98 perf_cpu_map__nr(top->evlist->core.user_requested_cpus) > 1
103 ret += SNPRINTF(bf + ret, size - ret, ")");
105 ret += SNPRINTF(bf + ret, size - ret, ", %d CPU%s)",
106 perf_cpu_map__nr(top->evlist->core.user_requested_cpus),
107 perf_cpu_map__nr(top->evlist->core.user_requested_cpus) > 1
111 perf_top__reset_sample_counters(top);
115 void perf_top__reset_sample_counters(struct perf_top *top)
117 top->samples = top->us_samples = top->kernel_samples =
118 top->exact_samples = top->guest_kernel_samples =
119 top->guest_us_samples = top->lost = top->drop = 0;