tools/perf/util/top.c

   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 "cpumap.h"
   9 #include "event.h"
  10 #include "evlist.h"
  11 #include "evsel.h"
  12 #include "parse-events.h"
  13 #include "symbol.h"
  14 #include "top.h"
  15 #include "../perf.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
  24 size_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 record_opts *opts = &top->record_opts;
  30         struct 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%% 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 = perf_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", perf_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         if (target->cpu_list)
  98                 ret += SNPRINTF(bf + ret, size - ret, ", CPU%s: %s)",
  99                                 top->evlist->core.cpus->nr > 1 ? "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                                         top->evlist->core.cpus->nr,
 107                                         top->evlist->core.cpus->nr > 1 ? "s" : "");
 108         }
 109
 110         perf_top__reset_sample_counters(top);
 111         return ret;
 112 }
 113
 114 void 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 }