tools/perf/ui/browsers/res_sample.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Display a menu with individual samples to browse with perf script */
   3 #include "hist.h"
   4 #include "evsel.h"
   5 #include "hists.h"
   6 #include "sort.h"
   7 #include "config.h"
   8 #include "time-utils.h"
   9 #include "../util.h"
  10 #include "../../util/util.h" // perf_exe()
  11 #include "../../perf.h"
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <linux/time64.h>
  15 #include <linux/zalloc.h>
  16
  17 static u64 context_len = 10 * NSEC_PER_MSEC;
  18
  19 static int res_sample_config(const char *var, const char *value, void *data __maybe_unused)
  20 {
  21         if (!strcmp(var, "samples.context"))
  22                 return perf_config_u64(&context_len, var, value);
  23         return 0;
  24 }
  25
  26 void res_sample_init(void)
  27 {
  28         perf_config(res_sample_config, NULL);
  29 }
  30
  31 int res_sample_browse(struct res_sample *res_samples, int num_res,
  32                       struct evsel *evsel, enum rstype rstype)
  33 {
  34         char **names;
  35         int i, n;
  36         int choice;
  37         char *cmd;
  38         char pbuf[256], tidbuf[32], cpubuf[32];
  39         const char *perf = perf_exe(pbuf, sizeof pbuf);
  40         char trange[128], tsample[64];
  41         struct res_sample *r;
  42         char extra_format[256];
  43
  44         names = calloc(num_res, sizeof(char *));
  45         if (!names)
  46                 return -1;
  47         for (i = 0; i < num_res; i++) {
  48                 char tbuf[64];
  49
  50                 timestamp__scnprintf_nsec(res_samples[i].time, tbuf, sizeof tbuf);
  51                 if (asprintf(&names[i], "%s: CPU %d tid %d", tbuf,
  52                              res_samples[i].cpu, res_samples[i].tid) < 0) {
  53                         while (--i >= 0)
  54                                 zfree(&names[i]);
  55                         free(names);
  56                         return -1;
  57                 }
  58         }
  59         choice = ui__popup_menu(num_res, names, NULL);
  60         for (i = 0; i < num_res; i++)
  61                 zfree(&names[i]);
  62         free(names);
  63
  64         if (choice < 0 || choice >= num_res)
  65                 return -1;
  66         r = &res_samples[choice];
  67
  68         n = timestamp__scnprintf_nsec(r->time - context_len, trange, sizeof trange);
  69         trange[n++] = ',';
  70         timestamp__scnprintf_nsec(r->time + context_len, trange + n, sizeof trange - n);
  71
  72         timestamp__scnprintf_nsec(r->time, tsample, sizeof tsample);
  73
  74         attr_to_script(extra_format, &evsel->core.attr);
  75
  76         if (asprintf(&cmd, "%s script %s%s --time %s %s%s %s%s --ns %s %s %s %s %s | less +/%s",
  77                      perf,
  78                      input_name ? "-i " : "",
  79                      input_name ? input_name : "",
  80                      trange,
  81                      r->cpu >= 0 ? "--cpu " : "",
  82                      r->cpu >= 0 ? (sprintf(cpubuf, "%d", r->cpu), cpubuf) : "",
  83                      r->tid ? "--tid " : "",
  84                      r->tid ? (sprintf(tidbuf, "%d", r->tid), tidbuf) : "",
  85                      extra_format,
  86                      rstype == A_ASM ? "-F +insn --xed" :
  87                      rstype == A_SOURCE ? "-F +srcline,+srccode" : "",
  88                      symbol_conf.inline_name ? "--inline" : "",
  89                      "--show-lost-events ",
  90                      r->tid ? "--show-switch-events --show-task-events " : "",
  91                      tsample) < 0)
  92                 return -1;
  93         run_script(cmd);
  94         free(cmd);
  95         return 0;
  96 }