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 "../../evlist.h"
  14 #include "../../hist.h"
  15 #include "../../sort.h"
  16 #include "../../symbol.h"
  17 #include "../../top.h"
  18
  19 struct perf_top_browser {
  20         struct ui_browser b;
  21         struct rb_root    root;
  22         struct sym_entry  *selection;
  23         float             sum_ksamples;
  24         int               dso_width;
  25         int               dso_short_width;
  26         int               sym_width;
  27 };
  28
  29 static void perf_top_browser__write(struct ui_browser *browser, void *entry, int row)
  30 {
  31         struct perf_top_browser *top_browser = container_of(browser, struct perf_top_browser, b);
  32         struct sym_entry *syme = rb_entry(entry, struct sym_entry, rb_node);
  33         bool current_entry = ui_browser__is_current_entry(browser, row);
  34         struct symbol *symbol = sym_entry__symbol(syme);
  35         struct perf_top *top = browser->priv;
  36         int width = browser->width;
  37         double pcnt;
  38
  39         pcnt = 100.0 - (100.0 * ((top_browser->sum_ksamples - syme->snap_count) /
  40                                  top_browser->sum_ksamples));
  41         ui_browser__set_percent_color(browser, pcnt, current_entry);
  42
  43         if (top->evlist->nr_entries == 1 || !top->display_weighted) {
  44                 slsmg_printf("%20.2f ", syme->weight);
  45                 width -= 24;
  46         } else {
  47                 slsmg_printf("%9.1f %10ld ", syme->weight, syme->snap_count);
  48                 width -= 23;
  49         }
  50
  51         slsmg_printf("%4.1f%%", pcnt);
  52         width -= 7;
  53
  54         if (verbose) {
  55                 slsmg_printf(" %016" PRIx64, symbol->start);
  56                 width -= 17;
  57         }
  58
  59         slsmg_printf(" %-*.*s ", top_browser->sym_width, top_browser->sym_width,
  60                      symbol->name);
  61         width -= top_browser->sym_width;
  62         slsmg_write_nstring(width >= syme->map->dso->long_name_len ?
  63                                 syme->map->dso->long_name :
  64                                 syme->map->dso->short_name, width);
  65
  66         if (current_entry)
  67                 top_browser->selection = syme;
  68 }
  69
  70 static void perf_top_browser__update_rb_tree(struct perf_top_browser *browser)
  71 {
  72         struct perf_top *top = browser->b.priv;
  73         u64 top_idx = browser->b.top_idx;
  74
  75         browser->root = RB_ROOT;
  76         browser->b.top = NULL;
  77         browser->sum_ksamples = perf_top__decay_samples(top, &browser->root);
  78         perf_top__find_widths(top, &browser->root, &browser->dso_width,
  79                               &browser->dso_short_width,
  80                               &browser->sym_width);
  81         if (browser->sym_width + browser->dso_width > browser->b.width - 29) {
  82                 browser->dso_width = browser->dso_short_width;
  83                 if (browser->sym_width + browser->dso_width > browser->b.width - 29)
  84                         browser->sym_width = browser->b.width - browser->dso_width - 29;
  85         }
  86
  87         /*
  88          * Adjust the ui_browser indexes since the entries in the browser->root
  89          * rb_tree may have changed, then seek it from start, so that we get a
  90          * possible new top of the screen.
  91          */
  92         browser->b.nr_entries = top->rb_entries;
  93
  94         if (top_idx >= browser->b.nr_entries) {
  95                 if (browser->b.height >= browser->b.nr_entries)
  96                         top_idx = browser->b.nr_entries - browser->b.height;
  97                 else
  98                         top_idx = 0;
  99         }
 100
 101         if (browser->b.index >= top_idx + browser->b.height)
 102                 browser->b.index = top_idx + browser->b.index - browser->b.top_idx;
 103
 104         if (browser->b.index >= browser->b.nr_entries)
 105                 browser->b.index = browser->b.nr_entries - 1;
 106
 107         browser->b.top_idx = top_idx;
 108         browser->b.seek(&browser->b, top_idx, SEEK_SET);
 109 }
 110
 111 static void perf_top_browser__annotate(struct perf_top_browser *browser)
 112 {
 113         struct sym_entry *syme = browser->selection;
 114         struct symbol *sym = sym_entry__symbol(syme);
 115         struct annotation *notes = symbol__annotation(sym);
 116         struct perf_top *top = browser->b.priv;
 117
 118         if (notes->src != NULL)
 119                 goto do_annotation;
 120
 121         pthread_mutex_lock(&notes->lock);
 122
 123         top->sym_filter_entry = NULL;
 124
 125         if (symbol__alloc_hist(sym, top->evlist->nr_entries) < 0) {
 126                 pr_err("Not enough memory for annotating '%s' symbol!\n",
 127                        sym->name);
 128                 pthread_mutex_unlock(&notes->lock);
 129                 return;
 130         }
 131
 132         top->sym_filter_entry = syme;
 133
 134         pthread_mutex_unlock(&notes->lock);
 135 do_annotation:
 136         symbol__tui_annotate(sym, syme->map, 0, top->delay_secs * 1000);
 137 }
 138
 139 static int perf_top_browser__run(struct perf_top_browser *browser)
 140 {
 141         int key;
 142         char title[160];
 143         struct perf_top *top = browser->b.priv;
 144         int delay_msecs = top->delay_secs * 1000;
 145         int exit_keys[] = { 'a', NEWT_KEY_ENTER, NEWT_KEY_RIGHT, 0, };
 146
 147         perf_top_browser__update_rb_tree(browser);
 148         perf_top__header_snprintf(top, title, sizeof(title));
 149         perf_top__reset_sample_counters(top);
 150
 151         if (ui_browser__show(&browser->b, title,
 152                              "ESC: exit, ENTER|->|a: Live Annotate") < 0)
 153                 return -1;
 154
 155         newtFormSetTimer(browser->b.form, delay_msecs);
 156         ui_browser__add_exit_keys(&browser->b, exit_keys);
 157
 158         while (1) {
 159                 key = ui_browser__run(&browser->b);
 160
 161                 switch (key) {
 162                 case -1:
 163                         /* FIXME we need to check if it was es.reason == NEWT_EXIT_TIMER */
 164                         perf_top_browser__update_rb_tree(browser);
 165                         perf_top__header_snprintf(top, title, sizeof(title));
 166                         perf_top__reset_sample_counters(top);
 167                         ui_browser__set_color(&browser->b, NEWT_COLORSET_ROOT);
 168                         SLsmg_gotorc(0, 0);
 169                         slsmg_write_nstring(title, browser->b.width);
 170                         break;
 171                 case 'a':
 172                 case NEWT_KEY_RIGHT:
 173                 case NEWT_KEY_ENTER:
 174                         if (browser->selection)
 175                                 perf_top_browser__annotate(browser);
 176                         break;
 177                 default:
 178                         goto out;
 179                 }
 180         }
 181 out:
 182         ui_browser__hide(&browser->b);
 183         return key;
 184 }
 185
 186 int perf_top__tui_browser(struct perf_top *top)
 187 {
 188         struct perf_top_browser browser = {
 189                 .b = {
 190                         .entries = &browser.root,
 191                         .refresh = ui_browser__rb_tree_refresh,
 192                         .seek    = ui_browser__rb_tree_seek,
 193                         .write   = perf_top_browser__write,
 194                         .priv    = top,
 195                 },
 196         };
 197
 198         ui_helpline__push("Press <- or ESC to exit");
 199         return perf_top_browser__run(&browser);
 200 }