GNU Linux-libre 4.19.211-gnu1
[releases.git] / tools / perf / util / top.c
1 /*
2  * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
3  *
4  * Refactored from builtin-top.c, see that files for further copyright notes.
5  *
6  * Released under the GPL v2. (and only v2, not any later version)
7  */
8
9 #include "cpumap.h"
10 #include "event.h"
11 #include "evlist.h"
12 #include "evsel.h"
13 #include "parse-events.h"
14 #include "symbol.h"
15 #include "top.h"
16 #include <inttypes.h>
17
18 #define SNPRINTF(buf, size, fmt, args...) \
19 ({ \
20         size_t r = snprintf(buf, size, fmt, ## args); \
21         r > size ?  size : r; \
22 })
23
24 size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size)
25 {
26         float samples_per_sec;
27         float ksamples_per_sec;
28         float esamples_percent;
29         struct record_opts *opts = &top->record_opts;
30         struct target *target = &opts->target;
31         size_t ret = 0;
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%% [", samples_per_sec,
50                                ksamples_percent, esamples_percent);
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->nr_entries == 1) {
74                 struct perf_evsel *first = perf_evlist__first(top->evlist);
75                 ret += SNPRINTF(bf + ret, size - ret, "%" PRIu64 "%s ",
76                                 (uint64_t)first->attr.sample_period,
77                                 opts->freq ? "Hz" : "");
78         }
79
80         ret += SNPRINTF(bf + ret, size - ret, "%s", perf_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                                 top->evlist->cpus->nr > 1 ? "s" : "",
99                                 target->cpu_list);
100         else {
101                 if (target->tid)
102                         ret += SNPRINTF(bf + ret, size - ret, ")");
103                 else
104                         ret += SNPRINTF(bf + ret, size - ret, ", %d CPU%s)",
105                                         top->evlist->cpus->nr,
106                                         top->evlist->cpus->nr > 1 ? "s" : "");
107         }
108
109         return ret;
110 }
111
112 void perf_top__reset_sample_counters(struct perf_top *top)
113 {
114         top->samples = top->us_samples = top->kernel_samples =
115         top->exact_samples = top->guest_kernel_samples =
116         top->guest_us_samples = 0;
117 }