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 = 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 size_t ret = 0;
30
31 if (!perf_guest) {
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) /
36 samples_per_sec)),
37 esamples_percent);
38 } else {
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;
42
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) /
48 samples_per_sec)),
49 100.0 - (100.0 * ((samples_per_sec - us_samples_per_sec) /
50 samples_per_sec)),
51 100.0 - (100.0 * ((samples_per_sec -
52 guest_kernel_samples_per_sec) /
53 samples_per_sec)),
54 100.0 - (100.0 * ((samples_per_sec -
55 guest_us_samples_per_sec) /
56 samples_per_sec)),
57 esamples_percent);
58 }
59
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" : "");
66 }
67
68 ret += SNPRINTF(bf + ret, size - ret, "%s", event_name(top->sym_evsel));
69
70 ret += SNPRINTF(bf + ret, size - ret, "], ");
71
72 if (top->target_pid)
73 ret += SNPRINTF(bf + ret, size - ret, " (target_pid: %s",
74 top->target_pid);
75 else if (top->target_tid)
76 ret += SNPRINTF(bf + ret, size - ret, " (target_tid: %s",
77 top->target_tid);
78 else if (top->uid_str != NULL)
79 ret += SNPRINTF(bf + ret, size - ret, " (uid: %s",
80 top->uid_str);
81 else
82 ret += SNPRINTF(bf + ret, size - ret, " (all");
83
84 if (top->cpu_list)
85 ret += SNPRINTF(bf + ret, size - ret, ", CPU%s: %s)",
86 top->evlist->cpus->nr > 1 ? "s" : "", top->cpu_list);
87 else {
88 if (top->target_tid)
89 ret += SNPRINTF(bf + ret, size - ret, ")");
90 else
91 ret += SNPRINTF(bf + ret, size - ret, ", %d CPU%s)",
92 top->evlist->cpus->nr,
93 top->evlist->cpus->nr > 1 ? "s" : "");
94 }
95
96 return ret;
97 }
98
perf_top__reset_sample_counters(struct perf_top * top)99 void perf_top__reset_sample_counters(struct perf_top *top)
100 {
101 top->samples = top->us_samples = top->kernel_samples =
102 top->exact_samples = top->guest_kernel_samples =
103 top->guest_us_samples = 0;
104 }
105