tools/perf/util/top.c

   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
  24 size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size)
  25 {
  26         float samples_per_sec = top->samples / top->delay_secs;
  27         float ksamples_per_sec = top->kernel_samples / top->delay_secs;
  28         float esamples_percent = (100.0 * top->exact_samples) / top->samples;
  29         struct perf_record_opts *opts = &top->record_opts;
  30         struct perf_target *target = &opts->target;
  31         size_t ret = 0;
  32
  33         if (!perf_guest) {
  34                 ret = SNPRINTF(bf, size,
  35                                "   PerfTop:%8.0f irqs/sec  kernel:%4.1f%%"
  36                                "  exact: %4.1f%% [", samples_per_sec,
  37                                100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
  38                                         samples_per_sec)),
  39                                 esamples_percent);
  40         } else {
  41                 float us_samples_per_sec = top->us_samples / top->delay_secs;
  42                 float guest_kernel_samples_per_sec = top->guest_kernel_samples / top->delay_secs;
  43                 float guest_us_samples_per_sec = top->guest_us_samples / top->delay_secs;
  44
  45                 ret = SNPRINTF(bf, size,
  46                                "   PerfTop:%8.0f irqs/sec  kernel:%4.1f%% us:%4.1f%%"
  47                                " guest kernel:%4.1f%% guest us:%4.1f%%"
  48                                " exact: %4.1f%% [", samples_per_sec,
  49                                100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
  50                                                  samples_per_sec)),
  51                                100.0 - (100.0 * ((samples_per_sec - us_samples_per_sec) /
  52                                                  samples_per_sec)),
  53                                100.0 - (100.0 * ((samples_per_sec -
  54                                                   guest_kernel_samples_per_sec) /
  55                                                  samples_per_sec)),
  56                                100.0 - (100.0 * ((samples_per_sec -
  57                                                   guest_us_samples_per_sec) /
  58                                                  samples_per_sec)),
  59                                esamples_percent);
  60         }
  61
  62         if (top->evlist->nr_entries == 1) {
  63                 struct perf_evsel *first = perf_evlist__first(top->evlist);
  64                 ret += SNPRINTF(bf + ret, size - ret, "%" PRIu64 "%s ",
  65                                 (uint64_t)first->attr.sample_period,
  66                                 opts->freq ? "Hz" : "");
  67         }
  68
  69         ret += SNPRINTF(bf + ret, size - ret, "%s", perf_evsel__name(top->sym_evsel));
  70
  71         ret += SNPRINTF(bf + ret, size - ret, "], ");
  72
  73         if (target->pid)
  74                 ret += SNPRINTF(bf + ret, size - ret, " (target_pid: %s",
  75                                 target->pid);
  76         else if (target->tid)
  77                 ret += SNPRINTF(bf + ret, size - ret, " (target_tid: %s",
  78                                 target->tid);
  79         else if (target->uid_str != NULL)
  80                 ret += SNPRINTF(bf + ret, size - ret, " (uid: %s",
  81                                 target->uid_str);
  82         else
  83                 ret += SNPRINTF(bf + ret, size - ret, " (all");
  84
  85         if (target->cpu_list)
  86                 ret += SNPRINTF(bf + ret, size - ret, ", CPU%s: %s)",
  87                                 top->evlist->cpus->nr > 1 ? "s" : "",
  88                                 target->cpu_list);
  89         else {
  90                 if (target->tid)
  91                         ret += SNPRINTF(bf + ret, size - ret, ")");
  92                 else
  93                         ret += SNPRINTF(bf + ret, size - ret, ", %d CPU%s)",
  94                                         top->evlist->cpus->nr,
  95                                         top->evlist->cpus->nr > 1 ? "s" : "");
  96         }
  97
  98         return ret;
  99 }
 100
 101 void perf_top__reset_sample_counters(struct perf_top *top)
 102 {
 103         top->samples = top->us_samples = top->kernel_samples =
 104         top->exact_samples = top->guest_kernel_samples =
 105         top->guest_us_samples = 0;
 106 }