tools/perf/util/ui/browsers/top.c

   1 /*
   2  * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
   3  *
   4  * Parts came from builtin-{top,stat,record}.c, see those files for further
   5  * copyright notes.
   6  *
   7  * Released under the GPL v2. (and only v2, not any later version)
   8  */
   9 #include "../browser.h"
  10 #include "../../annotate.h"
  11 #include "../helpline.h"
  12 #include "../libslang.h"
  13 #include "../util.h"
  14 #include "../../evlist.h"
  15 #include "../../hist.h"
  16 #include "../../sort.h"
  17 #include "../../symbol.h"
  18 #include "../../top.h"
  19
  20 struct perf_top_browser {
  21         struct ui_browser b;
  22         struct rb_root    root;
  23         struct sym_entry  *selection;
  24         float             sum_ksamples;
  25         int               dso_width;
  26         int               dso_short_width;
  27         int               sym_width;
  28 };
  29
  30 static void perf_top_browser__write(struct ui_browser *browser, void *entry, int row)
  31 {
  32         struct perf_top_browser *top_browser = container_of(browser, struct perf_top_browser, b);
  33         struct sym_entry *syme = rb_entry(entry, struct sym_entry, rb_node);
  34         bool current_entry = ui_browser__is_current_entry(browser, row);
  35         struct symbol *symbol = sym_entry__symbol(syme);
  36         struct perf_top *top = browser->priv;
  37         int width = browser->width;
  38         double pcnt;
  39
  40         pcnt = 100.0 - (100.0 * ((top_browser->sum_ksamples - syme->snap_count) /
  41                                  top_browser->sum_ksamples));
  42         ui_browser__set_percent_color(browser, pcnt, current_entry);
  43
  44         if (top->evlist->nr_entries == 1 || !top->display_weighted) {
  45                 slsmg_printf("%20.2f ", syme->weight);
  46                 width -= 24;
  47         } else {
  48                 slsmg_printf("%9.1f %10ld ", syme->weight, syme->snap_count);
  49                 width -= 23;
  50         }
  51
  52         slsmg_printf("%4.1f%%", pcnt);
  53         width -= 7;
  54
  55         if (verbose) {
  56                 slsmg_printf(" %016" PRIx64, symbol->start);
  57                 width -= 17;
  58         }
  59
  60         slsmg_printf(" %-*.*s ", top_browser->sym_width, top_browser->sym_width,
  61                      symbol->name);
  62         width -= top_browser->sym_width;
  63         slsmg_write_nstring(width >= syme->map->dso->long_name_len ?
  64                                 syme->map->dso->long_name :
  65                                 syme->map->dso->short_name, width);
  66
  67         if (current_entry)
  68                 top_browser->selection = syme;
  69 }
  70
  71 static void perf_top_browser__update_rb_tree(struct perf_top_browser *browser)
  72 {
  73         struct perf_top *top = browser->b.priv;
  74         u64 top_idx = browser->b.top_idx;
  75
  76         browser->root = RB_ROOT;
  77         browser->b.top = NULL;
  78         browser->sum_ksamples = perf_top__decay_samples(top, &browser->root);
  79         /*
  80          * No active symbols
  81          */
  82         if (top->rb_entries == 0)
  83                 return;
  84
  85         perf_top__find_widths(top, &browser->root, &browser->dso_width,
  86                               &browser->dso_short_width,
  87                               &browser->sym_width);
  88         if (browser->sym_width + browser->dso_width > browser->b.width - 29) {
  89                 browser->dso_width = browser->dso_short_width;
  90                 if (browser->sym_width + browser->dso_width > browser->b.width - 29)
  91                         browser->sym_width = browser->b.width - browser->dso_width - 29;
  92         }
  93
  94         /*
  95          * Adjust the ui_browser indexes since the entries in the browser->root
  96          * rb_tree may have changed, then seek it from start, so that we get a
  97          * possible new top of the screen.
  98          */
  99         browser->b.nr_entries = top->rb_entries;
 100
 101         if (top_idx >= browser->b.nr_entries) {
 102                 if (browser->b.height >= browser->b.nr_entries)
 103                         top_idx = browser->b.nr_entries - browser->b.height;
 104                 else
 105                         top_idx = 0;
 106         }
 107
 108         if (browser->b.index >= top_idx + browser->b.height)
 109                 browser->b.index = top_idx + browser->b.index - browser->b.top_idx;
 110
 111         if (browser->b.index >= browser->b.nr_entries)
 112                 browser->b.index = browser->b.nr_entries - 1;
 113
 114         browser->b.top_idx = top_idx;
 115         browser->b.seek(&browser->b, top_idx, SEEK_SET);
 116 }
 117
 118 static void perf_top_browser__annotate(struct perf_top_browser *browser)
 119 {
 120         struct sym_entry *syme = browser->selection;
 121         struct symbol *sym = sym_entry__symbol(syme);
 122         struct annotation *notes = symbol__annotation(sym);
 123         struct perf_top *top = browser->b.priv;
 124
 125         if (notes->src != NULL)
 126                 goto do_annotation;
 127
 128         pthread_mutex_lock(&notes->lock);
 129
 130         top->sym_filter_entry = NULL;
 131
 132         if (symbol__alloc_hist(sym, top->evlist->nr_entries) < 0) {
 133                 pr_err("Not enough memory for annotating '%s' symbol!\n",
 134                        sym->name);
 135                 pthread_mutex_unlock(&notes->lock);
 136                 return;
 137         }
 138
 139         top->sym_filter_entry = syme;
 140
 141         pthread_mutex_unlock(&notes->lock);
 142 do_annotation:
 143         symbol__tui_annotate(sym, syme->map, 0, top->delay_secs * 1000);
 144 }
 145
 146 static int perf_top_browser__run(struct perf_top_browser *browser)
 147 {
 148         int key;
 149         char title[160];
 150         struct perf_top *top = browser->b.priv;
 151         int delay_msecs = top->delay_secs * 1000;
 152         int exit_keys[] = { 'a', NEWT_KEY_ENTER, NEWT_KEY_RIGHT, 0, };
 153
 154         perf_top_browser__update_rb_tree(browser);
 155         perf_top__header_snprintf(top, title, sizeof(title));
 156         perf_top__reset_sample_counters(top);
 157
 158         if (ui_browser__show(&browser->b, title,
 159                              "ESC: exit, ENTER|->|a: Live Annotate") < 0)
 160                 return -1;
 161
 162         newtFormSetTimer(browser->b.form, delay_msecs);
 163         ui_browser__add_exit_keys(&browser->b, exit_keys);
 164
 165         while (1) {
 166                 key = ui_browser__run(&browser->b);
 167
 168                 switch (key) {
 169                 case -1:
 170                         /* FIXME we need to check if it was es.reason == NEWT_EXIT_TIMER */
 171                         perf_top_browser__update_rb_tree(browser);
 172                         perf_top__header_snprintf(top, title, sizeof(title));
 173                         perf_top__reset_sample_counters(top);
 174                         ui_browser__set_color(&browser->b, NEWT_COLORSET_ROOT);
 175                         SLsmg_gotorc(0, 0);
 176                         slsmg_write_nstring(title, browser->b.width);
 177                         break;
 178                 case 'a':
 179                 case NEWT_KEY_RIGHT:
 180                 case NEWT_KEY_ENTER:
 181                         if (browser->selection)
 182                                 perf_top_browser__annotate(browser);
 183                         break;
 184                 case NEWT_KEY_LEFT:
 185                         continue;
 186                 case NEWT_KEY_ESCAPE:
 187                         if (!ui__dialog_yesno("Do you really want to exit?"))
 188                                 continue;
 189                         /* Fall thru */
 190                 default:
 191                         goto out;
 192                 }
 193         }
 194 out:
 195         ui_browser__hide(&browser->b);
 196         return key;
 197 }
 198
 199 int perf_top__tui_browser(struct perf_top *top)
 200 {
 201         struct perf_top_browser browser = {
 202                 .b = {
 203                         .entries = &browser.root,
 204                         .refresh = ui_browser__rb_tree_refresh,
 205                         .seek    = ui_browser__rb_tree_seek,
 206                         .write   = perf_top_browser__write,
 207                         .priv    = top,
 208                 },
 209         };
 210
 211         return perf_top_browser__run(&browser);
 212 }