perf tools: Add support for weight v7 (modified)

perf record has a new option -W that enables weightened sampling.

Add sorting support in top/report for the average weight per sample and the
total weight sum. This allows to both compare relative cost per event
and the total cost over the measurement period.

Add the necessary glue to perf report, record and the library.

v2: Merge with new hist refactoring.
v3: Fix manpage. Remove value check.
Rename global_weight to weight and weight to local_weight.
v4: Readd sort keys to manpage
v5: Move weight to end
v6: Move weight to template
v7: Rename weight key.

Original patch from Andi modified by Stephane Eranian <eranian@google.com>
to include ONLY the weight supporting code and apply to pristine 3.8.0-rc4.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1359040242-8269-6-git-send-email-eranian@google.com
[ committer note: changed to cope with fc5871ed and the hists_link perf test entry ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index b5ea26cc7eb1..e31f070abe2f 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -98,7 +98,7 @@ static int perf_report__add_branch_hist_entry(struct perf_tool *tool,
                  * and not events sampled. Thus we use a pseudo period of 1.
                  */
                 he = __hists__add_branch_entry(&evsel->hists, al, parent,
-                                &bi[i], 1);
+                                &bi[i], 1, 1);
                 if (he) {
                         struct annotation *notes;
                         err = -ENOMEM;
@@ -156,7 +156,8 @@ static int perf_evsel__add_hist_entry(struct perf_evsel *evsel,
                         return err;
         }
 
-        he = __hists__add_entry(&evsel->hists, al, parent, sample->period);
+        he = __hists__add_entry(&evsel->hists, al, parent, sample->period,
+                                        sample->weight);
         if (he == NULL)
                 return -ENOMEM;
 
@@ -644,7 +645,8 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
                     "Use the stdio interface"),
         OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
                    "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline,"
-                   " dso_to, dso_from, symbol_to, symbol_from, mispredict"),
+                   " dso_to, dso_from, symbol_to, symbol_from, mispredict,"
+                   " weight, local_weight"),
         OPT_BOOLEAN(0, "showcpuutilization", &symbol_conf.show_cpu_utilization,
                     "Show sample percentage for different cpu modes"),
         OPT_STRING('p', "parent", &parent_pattern, "regex",