LXR linux/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 "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 "../perf.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
  23size_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                                top->evlist->core.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->core.cpus->nr,
 106                                        top->evlist->core.cpus->nr > 1 ? "s" : "");
 107        }
 108
 109        perf_top__reset_sample_counters(top);
 110        return ret;
 111}
 112
 113void perf_top__reset_sample_counters(struct perf_top *top)
 114{
 115        top->samples = top->us_samples = top->kernel_samples =
 116        top->exact_samples = top->guest_kernel_samples =
 117        top->guest_us_samples = top->lost = top->drop = 0;
 118}
 119