2 * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
4 * Refactored from builtin-top.c, see that files for further copyright notes.
6 * Released under the GPL v2. (and only v2, not any later version)
13 #include "parse-events.h"
18 #define SNPRINTF(buf, size, fmt, args...) \
20 size_t r = snprintf(buf, size, fmt, ## args); \
21 r > size ? size : r; \
24 size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size)
26 float samples_per_sec = top->samples / top->delay_secs;
27 float ksamples_per_sec = top->kernel_samples / top->delay_secs;
28 float esamples_percent = (100.0 * top->exact_samples) / top->samples;
29 struct perf_record_opts *opts = &top->record_opts;
30 struct perf_target *target = &opts->target;
34 ret = SNPRINTF(bf, size,
35 " PerfTop:%8.0f irqs/sec kernel:%4.1f%%"
36 " exact: %4.1f%% [", samples_per_sec,
37 100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
41 float us_samples_per_sec = top->us_samples / top->delay_secs;
42 float guest_kernel_samples_per_sec = top->guest_kernel_samples / top->delay_secs;
43 float guest_us_samples_per_sec = top->guest_us_samples / top->delay_secs;
45 ret = SNPRINTF(bf, size,
46 " PerfTop:%8.0f irqs/sec kernel:%4.1f%% us:%4.1f%%"
47 " guest kernel:%4.1f%% guest us:%4.1f%%"
48 " exact: %4.1f%% [", samples_per_sec,
49 100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
51 100.0 - (100.0 * ((samples_per_sec - us_samples_per_sec) /
53 100.0 - (100.0 * ((samples_per_sec -
54 guest_kernel_samples_per_sec) /
56 100.0 - (100.0 * ((samples_per_sec -
57 guest_us_samples_per_sec) /
62 if (top->evlist->nr_entries == 1) {
63 struct perf_evsel *first = perf_evlist__first(top->evlist);
64 ret += SNPRINTF(bf + ret, size - ret, "%" PRIu64 "%s ",
65 (uint64_t)first->attr.sample_period,
66 opts->freq ? "Hz" : "");
69 ret += SNPRINTF(bf + ret, size - ret, "%s", perf_evsel__name(top->sym_evsel));
71 ret += SNPRINTF(bf + ret, size - ret, "], ");
74 ret += SNPRINTF(bf + ret, size - ret, " (target_pid: %s",
77 ret += SNPRINTF(bf + ret, size - ret, " (target_tid: %s",
79 else if (target->uid_str != NULL)
80 ret += SNPRINTF(bf + ret, size - ret, " (uid: %s",
83 ret += SNPRINTF(bf + ret, size - ret, " (all");
86 ret += SNPRINTF(bf + ret, size - ret, ", CPU%s: %s)",
87 top->evlist->cpus->nr > 1 ? "s" : "",
91 ret += SNPRINTF(bf + ret, size - ret, ")");
93 ret += SNPRINTF(bf + ret, size - ret, ", %d CPU%s)",
94 top->evlist->cpus->nr,
95 top->evlist->cpus->nr > 1 ? "s" : "");
101 void perf_top__reset_sample_counters(struct perf_top *top)
103 top->samples = top->us_samples = top->kernel_samples =
104 top->exact_samples = top->guest_kernel_samples =
105 top->guest_us_samples = 0;