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 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 perf_cpu_map__nr(top->evlist->core.user_requested_cpus) > 1 99 ? "s" : "", 100 target->cpu_list); 101 else { 102 if (target->tid) 103 ret += SNPRINTF(bf + ret, size - ret, ")"); 104 else 105 ret += SNPRINTF(bf + ret, size - ret, ", %d CPU%s)", 106 perf_cpu_map__nr(top->evlist->core.user_requested_cpus), 107 perf_cpu_map__nr(top->evlist->core.user_requested_cpus) > 1 108 ? "s" : ""); 109 } 110 111 perf_top__reset_sample_counters(top); 112 return ret; 113 } 114 115 void perf_top__reset_sample_counters(struct perf_top *top) 116 { 117 top->samples = top->us_samples = top->kernel_samples = 118 top->exact_samples = top->guest_kernel_samples = 119 top->guest_us_samples = top->lost = top->drop = 0; 120 } 121