1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
4 *
5 * Refactored from builtin-top.c, see that files for further copyright notes.
6 */
7
8#include "event.h"
9#include "evlist.h"
10#include "evsel.h"
11#include "parse-events.h"
12#include "symbol.h"
13#include "top.h"
14#include "util.h"
15#include <inttypes.h>
16
17#define SNPRINTF(buf, size, fmt, args...) \
18({ \
19 size_t r = snprintf(buf, size, fmt, ## args); \
20 r > size ? size : r; \
21})
22
23size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size)
24{
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;
30 size_t ret = 0;
31 int nr_cpus;
32
33 if (top->samples) {
34 samples_per_sec = top->samples / top->delay_secs;
35 ksamples_per_sec = top->kernel_samples / top->delay_secs;
36 esamples_percent = (100.0 * top->exact_samples) / top->samples;
37 } else {
38 samples_per_sec = ksamples_per_sec = esamples_percent = 0.0;
39 }
40
41 if (!perf_guest) {
42 float ksamples_percent = 0.0;
43
44 if (samples_per_sec)
45 ksamples_percent = (100.0 * ksamples_per_sec) /
46 samples_per_sec;
47 ret = SNPRINTF(bf, size,
48 " PerfTop:%8.0f irqs/sec kernel:%4.1f%%"
49 " exact: %4.1f%% lost: %" PRIu64 "/%" PRIu64 " drop: %" PRIu64 "/%" PRIu64 " [",
50 samples_per_sec, ksamples_percent, esamples_percent,
51 top->lost, top->lost_total, top->drop, top->drop_total);
52 } else {
53 float us_samples_per_sec = top->us_samples / top->delay_secs;
54 float guest_kernel_samples_per_sec = top->guest_kernel_samples / top->delay_secs;
55 float guest_us_samples_per_sec = top->guest_us_samples / top->delay_secs;
56
57 ret = SNPRINTF(bf, size,
58 " PerfTop:%8.0f irqs/sec kernel:%4.1f%% us:%4.1f%%"
59 " guest kernel:%4.1f%% guest us:%4.1f%%"
60 " exact: %4.1f%% [", samples_per_sec,
61 100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
62 samples_per_sec)),
63 100.0 - (100.0 * ((samples_per_sec - us_samples_per_sec) /
64 samples_per_sec)),
65 100.0 - (100.0 * ((samples_per_sec -
66 guest_kernel_samples_per_sec) /
67 samples_per_sec)),
68 100.0 - (100.0 * ((samples_per_sec -
69 guest_us_samples_per_sec) /
70 samples_per_sec)),
71 esamples_percent);
72 }
73
74 if (top->evlist->core.nr_entries == 1) {
75 struct evsel *first = evlist__first(evlist: top->evlist);
76 ret += SNPRINTF(bf + ret, size - ret, "%" PRIu64 "%s ",
77 (uint64_t)first->core.attr.sample_period,
78 opts->freq ? "Hz" : "");
79 }
80
81 ret += SNPRINTF(bf + ret, size - ret, "%s", evsel__name(top->sym_evsel));
82
83 ret += SNPRINTF(bf + ret, size - ret, "], ");
84
85 if (target->pid)
86 ret += SNPRINTF(bf + ret, size - ret, " (target_pid: %s",
87 target->pid);
88 else if (target->tid)
89 ret += SNPRINTF(bf + ret, size - ret, " (target_tid: %s",
90 target->tid);
91 else if (top->uid_str != NULL)
92 ret += SNPRINTF(bf + ret, size - ret, " (uid: %s",
93 top->uid_str);
94 else
95 ret += SNPRINTF(bf + ret, size - ret, " (all");
96
97 nr_cpus = perf_cpu_map__nr(top->evlist->core.user_requested_cpus);
98 if (target->cpu_list)
99 ret += SNPRINTF(bf + ret, size - ret, ", CPU%s: %s)",
100 nr_cpus > 1 ? "s" : "",
101 target->cpu_list);
102 else {
103 if (target->tid)
104 ret += SNPRINTF(bf + ret, size - ret, ")");
105 else
106 ret += SNPRINTF(bf + ret, size - ret, ", %d CPU%s)",
107 nr_cpus, nr_cpus > 1 ? "s" : "");
108 }
109
110 perf_top__reset_sample_counters(top);
111 return ret;
112}
113
114void perf_top__reset_sample_counters(struct perf_top *top)
115{
116 top->samples = top->us_samples = top->kernel_samples =
117 top->exact_samples = top->guest_kernel_samples =
118 top->guest_us_samples = top->lost = top->drop = 0;
119}
120

source code of linux/tools/perf/util/top.c