perf report: Sort by sampled cycles percent per block for tui

Previous patch has implemented a new option "--total-cycles".  But only
stdio mode is supported.

This patch supports the tui mode and support '--percent-limit'.

For example,

 perf record -b ./div
 perf report --total-cycles --percent-limit 1

 # Samples: 2753248 of event 'cycles'
 Sampled Cycles%  Sampled Cycles  Avg Cycles%  Avg Cycles                                              [Program Block Range]         Shared Object
          26.04%            2.8M        0.40%          18                                             [div.c:42 -> div.c:39]                   div
          15.17%            1.2M        0.16%           7                                 [random_r.c:357 -> random_r.c:380]          libc-2.27.so
           5.11%          402.0K        0.04%           2                                             [div.c:27 -> div.c:28]                   div
           4.87%          381.6K        0.04%           2                                     [random.c:288 -> random.c:291]          libc-2.27.so
           4.53%          381.0K        0.04%           2                                             [div.c:40 -> div.c:40]                   div
           3.85%          300.9K        0.02%           1                                             [div.c:22 -> div.c:25]                   div
           3.08%          241.1K        0.02%           1                                           [rand.c:26 -> rand.c:27]          libc-2.27.so
           3.06%          240.0K        0.02%           1                                     [random.c:291 -> random.c:291]          libc-2.27.so
           2.78%          215.7K        0.02%           1                                     [random.c:298 -> random.c:298]          libc-2.27.so
           2.52%          198.3K        0.02%           1                                     [random.c:293 -> random.c:293]          libc-2.27.so
           2.36%          184.8K        0.02%           1                                           [rand.c:28 -> rand.c:28]          libc-2.27.so
           2.33%          180.5K        0.02%           1                                     [random.c:295 -> random.c:295]          libc-2.27.so
           2.28%          176.7K        0.02%           1                                     [random.c:295 -> random.c:295]          libc-2.27.so
           2.20%          168.8K        0.02%           1                                         [rand@plt+0 -> rand@plt+0]                   div
           1.98%          158.2K        0.02%           1                                 [random_r.c:388 -> random_r.c:388]          libc-2.27.so
           1.57%          123.3K        0.02%           1                                             [div.c:42 -> div.c:44]                   div
           1.44%          116.0K        0.42%          19                                 [random_r.c:357 -> random_r.c:394]          libc-2.27.so

--------------------------------------------------

 v7:
 ---
 1. Since we have used use_browser in report__browse_block_hists
    to support stdio mode, now we also add supporting for tui.

 2. Move block tui browser code from ui/browsers/hists.c
    to block-info.c.

 v6:
 ---
 Create report__tui_browse_block_hists in block-info.c
 (codes are moved from builtin-report.c).

 v5:
 ---
 Fix a crash issue when running perf report without
 '--total-cycles'. The issue is because the internal flag
 is renamed from 'total_cycles' to 'total_cycles_mode' in
 previous patch but this patch still uses 'total_cycles'
 to check if the '--total-cycles' option is enabled, which
 causes the code to be inconsistent.

 v4:
 ---
 Since the block collection is moved out of printing in
 previous patch, this patch is updated accordingly for
 tui supporting.

 v3:
 ---
 Minor change since the function name is changed:
 block_total_cycles_percent -> block_info__total_cycles_percent

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191107074719.26139-8-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index ca41187525ede556444d0458767c97c247181693..1e81985b7d569182796f0377315b9f19c1f6f9fe 100644 (file)
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -485,6 +485,22 @@ static size_t hists__fprintf_nr_sample_events(struct hists *hists, struct report
        return ret + fprintf(fp, "\n#\n");
 }
 
+static int perf_evlist__tui_block_hists_browse(struct evlist *evlist,
+                                              struct report *rep)
+{
+       struct evsel *pos;
+       int i = 0, ret;
+
+       evlist__for_each_entry(evlist, pos) {
+               ret = report__browse_block_hists(&rep->block_reports[i++].hist,
+                                                rep->min_percent, pos);
+               if (ret != 0)
+                       return ret;
+       }
+
+       return 0;
+}
+
 static int perf_evlist__tty_browse_hists(struct evlist *evlist,
                                         struct report *rep,
                                         const char *help)
@@ -595,6 +611,11 @@ static int report__browse_hists(struct report *rep)
 
        switch (use_browser) {
        case 1:
+               if (rep->total_cycles_mode) {
+                       ret = perf_evlist__tui_block_hists_browse(evlist, rep);
+                       break;
+               }
+
                ret = perf_evlist__tui_browse_hists(evlist, help, NULL,
                                                    rep->min_percent,
                                                    &session->header.env,
@@ -1396,12 +1417,8 @@ repeat:
        if (report.total_cycles_mode) {
                if (sort__mode != SORT_MODE__BRANCH)
                        report.total_cycles_mode = false;
-               else if (!report.use_stdio) {
-                       pr_err("Error: --total-cycles can be only used together with --stdio\n");
-                       goto error;
-               } else {
+               else
                        sort_order = "sym";
-               }
        }
 
        if (strcmp(input_name, "-") != 0)

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 7a7187e069b48adf05ef5498bcaf306b8e6f8119..334afc2139e73d65121b171e24edae1763df713e 100644 (file)
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -26,6 +26,7 @@
 #include "../../util/sort.h"
 #include "../../util/top.h"
 #include "../../util/thread.h"
+#include "../../util/block-info.h"
 #include "../../arch/common.h"
 #include "../../perf.h"
 
@@ -1783,7 +1784,11 @@ static unsigned int hist_browser__refresh(struct ui_browser *browser)
                        continue;
                }
 
-               percent = hist_entry__get_percent_limit(h);
+               if (symbol_conf.report_individual_block)
+                       percent = block_info__total_cycles_percent(h);
+               else
+                       percent = hist_entry__get_percent_limit(h);
+
                if (percent < hb->min_pcnt)
                        continue;
 

diff --git a/tools/perf/ui/browsers/hists.h b/tools/perf/ui/browsers/hists.h
index 91d3e18b50aadf37f5a5f93c63b1d9cc7705aa60..078f2f2c7abd2658403208d0b1d0229a3ad48778 100644 (file)
--- a/tools/perf/ui/browsers/hists.h
+++ b/tools/perf/ui/browsers/hists.h
@@ -5,6 +5,7 @@
 #include "ui/browser.h"
 
 struct annotation_options;
+struct evsel;
 
 struct hist_browser {
        struct ui_browser   b;
@@ -15,6 +16,7 @@ struct hist_browser {
        struct pstack       *pstack;
        struct perf_env     *env;
        struct annotation_options *annotation_opts;
+       struct evsel        *block_evsel;
        int                  print_seq;
        bool                 show_dso;
        bool                 show_headers;

diff --git a/tools/perf/util/block-info.c b/tools/perf/util/block-info.c
index 597d1205fa6c1cab10294754854212570f1d2b32..9abc201ebe63937342dc2d04612e32e36a210573 100644 (file)
--- a/tools/perf/util/block-info.c
+++ b/tools/perf/util/block-info.c
@@ -10,6 +10,7 @@
 #include "map.h"
 #include "srcline.h"
 #include "evlist.h"
+#include "ui/browsers/hists.h"
 
 static struct block_header_column {
        const char *name;
@@ -438,9 +439,75 @@ struct block_report *block_info__create_report(struct evlist *evlist,
        return block_reports;
 }
 
+#ifdef HAVE_SLANG_SUPPORT
+static int block_hists_browser__title(struct hist_browser *browser, char *bf,
+                                     size_t size)
+{
+       struct hists *hists = evsel__hists(browser->block_evsel);
+       const char *evname = perf_evsel__name(browser->block_evsel);
+       unsigned long nr_samples = hists->stats.nr_events[PERF_RECORD_SAMPLE];
+       int ret;
+
+       ret = scnprintf(bf, size, "# Samples: %lu", nr_samples);
+       if (evname)
+               scnprintf(bf + ret, size -  ret, " of event '%s'", evname);
+
+       return 0;
+}
+
+static int block_hists_tui_browse(struct block_hist *bh, struct evsel *evsel,
+                                 float min_percent)
+{
+       struct hists *hists = &bh->block_hists;
+       struct hist_browser *browser;
+       int key = -1;
+       static const char help[] =
+       " q             Quit \n";
+
+       browser = hist_browser__new(hists);
+       if (!browser)
+               return -1;
+
+       browser->block_evsel = evsel;
+       browser->title = block_hists_browser__title;
+       browser->min_pcnt = min_percent;
+
+       /* reset abort key so that it can get Ctrl-C as a key */
+       SLang_reset_tty();
+       SLang_init_tty(0, 0, 0);
+
+       while (1) {
+               key = hist_browser__run(browser, "? - help", true);
+
+               switch (key) {
+               case 'q':
+                       goto out;
+               case '?':
+                       ui_browser__help_window(&browser->b, help);
+                       break;
+               default:
+                       break;
+               }
+       }
+
+out:
+       hist_browser__delete(browser);
+       return 0;
+}
+#else
+static int block_hists_tui_browse(struct block_hist *bh __maybe_unused,
+                                 struct evsel *evsel __maybe_unused,
+                                 float min_percent __maybe_unused)
+{
+       return 0;
+}
+#endif
+
 int report__browse_block_hists(struct block_hist *bh, float min_percent,
-                              struct evsel *evsel __maybe_unused)
+                              struct evsel *evsel)
 {
+       int ret;
+
        switch (use_browser) {
        case 0:
                symbol_conf.report_individual_block = true;
@@ -448,6 +515,11 @@ int report__browse_block_hists(struct block_hist *bh, float min_percent,
                               stdout, true);
                hists__delete_entries(&bh->block_hists);
                return 0;
+       case 1:
+               symbol_conf.report_individual_block = true;
+               ret = block_hists_tui_browse(bh, evsel, min_percent);
+               hists__delete_entries(&bh->block_hists);
+               return ret;
        default:
                return -1;
        }