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
24size_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
112void 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