LXR linux/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
  24size_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%% [", samples_per_sec,
  50                               ksamples_percent, esamples_percent);
  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->nr_entries == 1) {
  74                struct perf_evsel *first = perf_evlist__first(top->evlist);
  75                ret += SNPRINTF(bf + ret, size - ret, "%" PRIu64 "%s ",
  76                                (uint64_t)first->attr.sample_period,
  77                                opts->freq ? "Hz" : "");
  78        }
  79
  80        ret += SNPRINTF(bf + ret, size - ret, "%s", perf_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->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->cpus->nr,
 106                                        top->evlist->cpus->nr > 1 ? "s" : "");
 107        }
 108
 109        return ret;
 110}
 111
 112void perf_top__reset_sample_counters(struct perf_top *top)
 113{
 114        top->samples = top->us_samples = top->kernel_samples =
 115        top->exact_samples = top->guest_kernel_samples =
 116        top->guest_us_samples = 0;
 117}
 118