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;
32 ret = SNPRINTF(bf, size,
33 " PerfTop:%8.0f irqs/sec kernel:%4.1f%%"
34 " exact: %4.1f%% [", samples_per_sec,
35 100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
39 float us_samples_per_sec = top->us_samples / top->delay_secs;
40 float guest_kernel_samples_per_sec = top->guest_kernel_samples / top->delay_secs;
41 float guest_us_samples_per_sec = top->guest_us_samples / top->delay_secs;
43 ret = SNPRINTF(bf, size,
44 " PerfTop:%8.0f irqs/sec kernel:%4.1f%% us:%4.1f%%"
45 " guest kernel:%4.1f%% guest us:%4.1f%%"
46 " exact: %4.1f%% [", samples_per_sec,
47 100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
49 100.0 - (100.0 * ((samples_per_sec - us_samples_per_sec) /
51 100.0 - (100.0 * ((samples_per_sec -
52 guest_kernel_samples_per_sec) /
54 100.0 - (100.0 * ((samples_per_sec -
55 guest_us_samples_per_sec) /
60 if (top->evlist->nr_entries == 1) {
61 struct perf_evsel *first;
62 first = list_entry(top->evlist->entries.next, struct perf_evsel, node);
63 ret += SNPRINTF(bf + ret, size - ret, "%" PRIu64 "%s ",
64 (uint64_t)first->attr.sample_period,
65 top->freq ? "Hz" : "");
68 ret += SNPRINTF(bf + ret, size - ret, "%s", event_name(top->sym_evsel));
70 ret += SNPRINTF(bf + ret, size - ret, "], ");
72 if (top->target_pid != -1)
73 ret += SNPRINTF(bf + ret, size - ret, " (target_pid: %d",
75 else if (top->target_tid != -1)
76 ret += SNPRINTF(bf + ret, size - ret, " (target_tid: %d",
79 ret += SNPRINTF(bf + ret, size - ret, " (all");
82 ret += SNPRINTF(bf + ret, size - ret, ", CPU%s: %s)",
83 top->evlist->cpus->nr > 1 ? "s" : "", top->cpu_list);
85 if (top->target_tid != -1)
86 ret += SNPRINTF(bf + ret, size - ret, ")");
88 ret += SNPRINTF(bf + ret, size - ret, ", %d CPU%s)",
89 top->evlist->cpus->nr,
90 top->evlist->cpus->nr > 1 ? "s" : "");
96 void perf_top__reset_sample_counters(struct perf_top *top)
98 top->samples = top->us_samples = top->kernel_samples =
99 top->exact_samples = top->guest_kernel_samples =
100 top->guest_us_samples = 0;