perf report: Display average IPC and IPC coverage per symbol

Support displaying the average IPC and IPC coverage per symbol in 'perf
report' --tui and --stdio modes.

For example,

 $ perf record -b ...
 $ perf report -s symbol

 Overhead  Symbol                           IPC   [IPC Coverage]
   39.60%  [.] __random                     2.30  [ 54.8%]
   18.02%  [.] main                         0.43  [ 54.3%]
   14.21%  [.] compute_flag                 2.29  [100.0%]
   14.16%  [.] rand                         0.36  [100.0%]
    7.06%  [.] __random_r                   2.57  [ 70.5%]
    6.85%  [.] rand@plt                     0.00  [  0.0%]

Jiri Olsa <jolsa@redhat.com> provided the patch to support the --stdio
mode. I merged Jiri's code in this patch.

  $ perf report -s symbol --stdio

    # Overhead  Symbol                       IPC   [IPC Coverage]
    # ........  ...........................  ....................
    #
      39.60%  [.] __random                   2.30  [ 54.8%]
      18.02%  [.] main                       0.43  [ 54.3%]
      14.21%  [.] compute_flag               2.29  [100.0%]
      14.16%  [.] rand                       0.36  [100.0%]
       7.06%  [.] __random_r                 2.57  [ 70.5%]
       6.85%  [.] rand@plt                   0.00  [  0.0%]
       0.02%  [k] run_timer_softirq          1.60  [ 57.2%]

The columns "IPC" and "[IPC Coverage]" are automatically enabled when
the sort-key "symbol" is specified. If the perf.data file doesn't
contain timed LBR information, columns are filled with "-".

For example,

  # Overhead  Symbol                       IPC   [IPC Coverage]
  # ........  ...........................  ....................
  #
      46.57%  [.] main                     -      -
      17.60%  [.] rand                     -      -
      15.84%  [.] __random_r               -      -
      11.90%  [.] __random                 -      -
       6.50%  [.] compute_flag             -      -
       1.59%  [.] rand@plt                 -      -
       0.00%  [.] _dl_relocate_object      -      -
       0.00%  [k] tlb_flush_mmu            -      -
       0.00%  [k] perf_event_mmap          -      -
       0.00%  [k] native_sched_clock       -      -
       0.00%  [k] intel_pmu_handle_irq_v4  -      -
       0.00%  [k] native_write_msr         -      -

 v3:
 ---
 Removed the sortkey 'ipc' from command-line. The columns "IPC"
 and "[IPC Coverage]" are automatically enabled when "symbol"
 is specified.

 v2:
 ---
 Merge in Jiri's patch to support stdio mode

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1543586097-27632-4-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 23 insertions, 3 deletions

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 257c9c18cb7e..4958095be4fc 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -85,6 +85,7 @@ struct report {
 	int			socket_filter;
 	DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
 	struct branch_type_stat	brtype_stat;
+	bool			symbol_ipc;
 };
 
 static int report__config(const char *var, const char *value, void *cb)
@@ -129,7 +130,7 @@ static int hist_iter__report_callback(struct hist_entry_iter *iter,
 	struct mem_info *mi;
 	struct branch_info *bi;
 
-	if (!ui__has_annotation())
+	if (!ui__has_annotation() && !rep->symbol_ipc)
 		return 0;
 
 	hist__account_cycles(sample->branch_stack, al, sample,
@@ -174,7 +175,7 @@ static int hist_iter__branch_callback(struct hist_entry_iter *iter,
 	struct perf_evsel *evsel = iter->evsel;
 	int err;
 
-	if (!ui__has_annotation())
+	if (!ui__has_annotation() && !rep->symbol_ipc)
 		return 0;
 
 	hist__account_cycles(sample->branch_stack, al, sample,
@@ -1133,6 +1134,7 @@ int cmd_report(int argc, const char **argv)
 		.mode  = PERF_DATA_MODE_READ,
 	};
 	int ret = hists__init();
+	char sort_tmp[128];
 
 	if (ret < 0)
 		return ret;
@@ -1284,6 +1286,24 @@ repeat:
 	else
 		use_browser = 0;
 
+	if (sort_order && strstr(sort_order, "ipc")) {
+		parse_options_usage(report_usage, options, "s", 1);
+		goto error;
+	}
+
+	if (sort_order && strstr(sort_order, "symbol")) {
+		if (sort__mode == SORT_MODE__BRANCH) {
+			snprintf(sort_tmp, sizeof(sort_tmp), "%s,%s",
+				 sort_order, "ipc_lbr");
+			report.symbol_ipc = true;
+		} else {
+			snprintf(sort_tmp, sizeof(sort_tmp), "%s,%s",
+				 sort_order, "ipc_null");
+		}
+
+		sort_order = sort_tmp;
+	}
+
 	if (setup_sorting(session->evlist) < 0) {
 		if (sort_order)
 			parse_options_usage(report_usage, options, "s", 1);
@@ -1311,7 +1331,7 @@ repeat:
 	 * so don't allocate extra space that won't be used in the stdio
 	 * implementation.
 	 */
-	if (ui__has_annotation()) {
+	if (ui__has_annotation() || report.symbol_ipc) {
 		ret = symbol__annotation_init();
 		if (ret < 0)
 			goto error;