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
perf_top__header_snprintf(struct perf_top * top,char * bf,size_t size)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 perf_record_opts *opts = &top->record_opts;
30 struct perf_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
perf_top__reset_sample_counters(struct perf_top * top)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 }
118