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TOMOYO Linux Cross Reference
Linux/tools/perf/util/top.c

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  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;
 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 
112 void 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 

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