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
perf_top__header_snprintf(struct perf_top * top,char * bf,size_t size)23 size_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
32 if (top->samples) {
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;
36 } else {
37 samples_per_sec = ksamples_per_sec = esamples_percent = 0.0;
38 }
39
40 if (!perf_guest) {
41 float ksamples_percent = 0.0;
42
43 if (samples_per_sec)
44 ksamples_percent = (100.0 * ksamples_per_sec) /
45 samples_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);
51 } else {
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;
55
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) /
61 samples_per_sec)),
62 100.0 - (100.0 * ((samples_per_sec - us_samples_per_sec) /
63 samples_per_sec)),
64 100.0 - (100.0 * ((samples_per_sec -
65 guest_kernel_samples_per_sec) /
66 samples_per_sec)),
67 100.0 - (100.0 * ((samples_per_sec -
68 guest_us_samples_per_sec) /
69 samples_per_sec)),
70 esamples_percent);
71 }
72
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" : "");
78 }
79
80 ret += SNPRINTF(bf + ret, size - ret, "%s", evsel__name(top->sym_evsel));
81
82 ret += SNPRINTF(bf + ret, size - ret, "], ");
83
84 if (target->pid)
85 ret += SNPRINTF(bf + ret, size - ret, " (target_pid: %s",
86 target->pid);
87 else if (target->tid)
88 ret += SNPRINTF(bf + ret, size - ret, " (target_tid: %s",
89 target->tid);
90 else if (target->uid_str != NULL)
91 ret += SNPRINTF(bf + ret, size - ret, " (uid: %s",
92 target->uid_str);
93 else
94 ret += SNPRINTF(bf + ret, size - ret, " (all");
95
96 if (target->cpu_list)
97 ret += SNPRINTF(bf + ret, size - ret, ", CPU%s: %s)",
98 perf_cpu_map__nr(top->evlist->core.user_requested_cpus) > 1
99 ? "s" : "",
100 target->cpu_list);
101 else {
102 if (target->tid)
103 ret += SNPRINTF(bf + ret, size - ret, ")");
104 else
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
108 ? "s" : "");
109 }
110
111 perf_top__reset_sample_counters(top);
112 return ret;
113 }
114
perf_top__reset_sample_counters(struct perf_top * top)115 void perf_top__reset_sample_counters(struct perf_top *top)
116 {
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;
120 }
121