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 "../perf.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 
perf_top__header_snprintf(struct perf_top * top,char * bf,size_t size)23 size_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 
32 	if (top->samples) {
33 		samples_per_sec = top->samples / top->delay_secs;
34 		ksamples_per_sec = top->kernel_samples / top->delay_secs;
35 		esamples_percent = (100.0 * top->exact_samples) / top->samples;
36 	} else {
37 		samples_per_sec = ksamples_per_sec = esamples_percent = 0.0;
38 	}
39 
40 	if (!perf_guest) {
41 		float ksamples_percent = 0.0;
42 
43 		if (samples_per_sec)
44 			ksamples_percent = (100.0 * ksamples_per_sec) /
45 							samples_per_sec;
46 		ret = SNPRINTF(bf, size,
47 			       "   PerfTop:%8.0f irqs/sec  kernel:%4.1f%%"
48 			       "  exact: %4.1f%% lost: %" PRIu64 "/%" PRIu64 " drop: %" PRIu64 "/%" PRIu64 " [",
49 			       samples_per_sec, ksamples_percent, esamples_percent,
50 			       top->lost, top->lost_total, top->drop, top->drop_total);
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->core.nr_entries == 1) {
74 		struct evsel *first = evlist__first(top->evlist);
75 		ret += SNPRINTF(bf + ret, size - ret, "%" PRIu64 "%s ",
76 				(uint64_t)first->core.attr.sample_period,
77 				opts->freq ? "Hz" : "");
78 	}
79 
80 	ret += SNPRINTF(bf + ret, size - ret, "%s", 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->core.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->core.cpus->nr,
106 					top->evlist->core.cpus->nr > 1 ? "s" : "");
107 	}
108 
109 	perf_top__reset_sample_counters(top);
110 	return ret;
111 }
112 
perf_top__reset_sample_counters(struct perf_top * top)113 void perf_top__reset_sample_counters(struct perf_top *top)
114 {
115 	top->samples = top->us_samples = top->kernel_samples =
116 	top->exact_samples = top->guest_kernel_samples =
117 	top->guest_us_samples = top->lost = top->drop = 0;
118 }
119