1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
4 *
5 * Refactored from builtin-top.c, see that files for further copyright notes.
6 */
7
8#include "event.h"
9#include "evlist.h"
10#include "evsel.h"
11#include "parse-events.h"
12#include "symbol.h"
13#include "top.h"
14#include "util.h"
15#include <inttypes.h>
16
17#define SNPRINTF(buf, size, fmt, args...) \
18({ \
19	size_t r = snprintf(buf, size, fmt, ## args); \
20	r > size ?  size : r; \
21})
22
23size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size)
24{
25	float samples_per_sec;
26	float ksamples_per_sec;
27	float esamples_percent;
28	struct record_opts *opts = &top->record_opts;
29	struct target *target = &opts->target;
30	size_t ret = 0;
31	int nr_cpus;
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%% lost: %" PRIu64 "/%" PRIu64 " drop: %" PRIu64 "/%" PRIu64 " [",
50			       samples_per_sec, ksamples_percent, esamples_percent,
51			       top->lost, top->lost_total, top->drop, top->drop_total);
52	} else {
53		float us_samples_per_sec = top->us_samples / top->delay_secs;
54		float guest_kernel_samples_per_sec = top->guest_kernel_samples / top->delay_secs;
55		float guest_us_samples_per_sec = top->guest_us_samples / top->delay_secs;
56
57		ret = SNPRINTF(bf, size,
58			       "   PerfTop:%8.0f irqs/sec  kernel:%4.1f%% us:%4.1f%%"
59			       " guest kernel:%4.1f%% guest us:%4.1f%%"
60			       " exact: %4.1f%% [", samples_per_sec,
61			       100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
62						 samples_per_sec)),
63			       100.0 - (100.0 * ((samples_per_sec - us_samples_per_sec) /
64						 samples_per_sec)),
65			       100.0 - (100.0 * ((samples_per_sec -
66						  guest_kernel_samples_per_sec) /
67						 samples_per_sec)),
68			       100.0 - (100.0 * ((samples_per_sec -
69						  guest_us_samples_per_sec) /
70						 samples_per_sec)),
71			       esamples_percent);
72	}
73
74	if (top->evlist->core.nr_entries == 1) {
75		struct evsel *first = evlist__first(top->evlist);
76		ret += SNPRINTF(bf + ret, size - ret, "%" PRIu64 "%s ",
77				(uint64_t)first->core.attr.sample_period,
78				opts->freq ? "Hz" : "");
79	}
80
81	ret += SNPRINTF(bf + ret, size - ret, "%s", evsel__name(top->sym_evsel));
82
83	ret += SNPRINTF(bf + ret, size - ret, "], ");
84
85	if (target->pid)
86		ret += SNPRINTF(bf + ret, size - ret, " (target_pid: %s",
87				target->pid);
88	else if (target->tid)
89		ret += SNPRINTF(bf + ret, size - ret, " (target_tid: %s",
90				target->tid);
91	else if (target->uid_str != NULL)
92		ret += SNPRINTF(bf + ret, size - ret, " (uid: %s",
93				target->uid_str);
94	else
95		ret += SNPRINTF(bf + ret, size - ret, " (all");
96
97	nr_cpus = perf_cpu_map__nr(top->evlist->core.user_requested_cpus);
98	if (target->cpu_list)
99		ret += SNPRINTF(bf + ret, size - ret, ", CPU%s: %s)",
100				nr_cpus > 1 ? "s" : "",
101				target->cpu_list);
102	else {
103		if (target->tid)
104			ret += SNPRINTF(bf + ret, size - ret, ")");
105		else
106			ret += SNPRINTF(bf + ret, size - ret, ", %d CPU%s)",
107					nr_cpus, nr_cpus > 1 ? "s" : "");
108	}
109
110	perf_top__reset_sample_counters(top);
111	return ret;
112}
113
114void perf_top__reset_sample_counters(struct perf_top *top)
115{
116	top->samples = top->us_samples = top->kernel_samples =
117	top->exact_samples = top->guest_kernel_samples =
118	top->guest_us_samples = top->lost = top->drop = 0;
119}
120