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