perf stat: Introduce perf_counts function

Introducing perf_counts function, that returns
'struct perf_counts_values' pointer for given cpu.

Also moving perf_counts* structures into stat.h.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1435310967-14570-5-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-stat.c

@@ -316,7 +316,7 @@ static int read_cb(struct perf_evsel *evsel, int cpu, int thread __maybe_unused,
 		if (!evsel->snapshot)
 			perf_evsel__compute_deltas(evsel, cpu, count);
 		perf_counts_values__scale(count, scale, NULL);
-		evsel->counts->cpu[cpu] = *count;
+		*perf_counts(evsel->counts, cpu) = *count;
 		if (aggr_mode == AGGR_NONE)
 			perf_stat__update_shadow_stats(evsel, count->values, cpu);
 		break;
@@ -805,9 +805,9 @@ static void print_aggr(char *prefix)
 				s2 = aggr_get_id(evsel_list->cpus, cpu2);
 				if (s2 != id)
 					continue;
-				val += counter->counts->cpu[cpu].val;
+				val += perf_counts(counter->counts, cpu)->val;
-				ena += counter->counts->cpu[cpu].ena;
+				ena += perf_counts(counter->counts, cpu)->ena;
-				run += counter->counts->cpu[cpu].run;
+				run += perf_counts(counter->counts, cpu)->run;
 				nr++;
 			}
 			if (prefix)
@@ -915,9 +915,9 @@ static void print_counter(struct perf_evsel *counter, char *prefix)
 	int cpu;
 
 	for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
-		val = counter->counts->cpu[cpu].val;
+		val = perf_counts(counter->counts, cpu)->val;
-		ena = counter->counts->cpu[cpu].ena;
+		ena = perf_counts(counter->counts, cpu)->ena;
-		run = counter->counts->cpu[cpu].run;
+		run = perf_counts(counter->counts, cpu)->run;
 
 		if (prefix)
 			fprintf(output, "%s", prefix);

tools/perf/tests/openat-syscall-all-cpus.c

@@ -98,9 +98,9 @@ int test__openat_syscall_event_on_all_cpus(void)
 		}
 
 		expected = nr_openat_calls + cpu;
-		if (evsel->counts->cpu[cpu].val != expected) {
+		if (perf_counts(evsel->counts, cpu)->val != expected) {
 			pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls on cpu %d, got %" PRIu64 "\n",
-				 expected, cpus->map[cpu], evsel->counts->cpu[cpu].val);
+				 expected, cpus->map[cpu], perf_counts(evsel->counts, cpu)->val);
 			err = -1;
 		}
 	}

tools/perf/tests/openat-syscall.c

@@ -44,7 +44,7 @@ int test__openat_syscall_event(void)
 		goto out_close_fd;
 	}
 
-	if (evsel->counts->cpu[0].val != nr_openat_calls) {
+	if (perf_counts(evsel->counts, 0)->val != nr_openat_calls) {
 		pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls, got %" PRIu64 "\n",
 			 nr_openat_calls, evsel->counts->cpu[0].val);
 		goto out_close_fd;

tools/perf/util/evsel.c

@@ -910,8 +910,8 @@ void perf_evsel__compute_deltas(struct perf_evsel *evsel, int cpu,
 		tmp = evsel->prev_raw_counts->aggr;
 		evsel->prev_raw_counts->aggr = *count;
 	} else {
-		tmp = evsel->prev_raw_counts->cpu[cpu];
+		tmp = *perf_counts(evsel->prev_raw_counts, cpu);
-		evsel->prev_raw_counts->cpu[cpu] = *count;
+		*perf_counts(evsel->prev_raw_counts, cpu) = *count;
 	}
 
 	count->val = count->val - tmp.val;
@@ -972,7 +972,7 @@ int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
 
 	perf_evsel__compute_deltas(evsel, cpu, &count);
 	perf_counts_values__scale(&count, scale, NULL);
-	evsel->counts->cpu[cpu] = count;
+	*perf_counts(evsel->counts, cpu) = count;
 	return 0;
 }
 

tools/perf/util/evsel.h

@@ -9,23 +9,7 @@
 #include "xyarray.h"
 #include "symbol.h"
 #include "cpumap.h"
-
+#include "stat.h"
-struct perf_counts_values {
-	union {
-		struct {
-			u64 val;
-			u64 ena;
-			u64 run;
-		};
-		u64 values[3];
-	};
-};
-
-struct perf_counts {
-	s8		   	  scaled;
-	struct perf_counts_values aggr;
-	struct perf_counts_values cpu[];
-};
 
 struct perf_evsel;
 

tools/perf/util/stat.h

@@ -31,6 +31,29 @@ enum aggr_mode {
 	AGGR_CORE,
 };
 
+struct perf_counts_values {
+	union {
+		struct {
+			u64 val;
+			u64 ena;
+			u64 run;
+		};
+		u64 values[3];
+	};
+};
+
+struct perf_counts {
+	s8			  scaled;
+	struct perf_counts_values aggr;
+	struct perf_counts_values cpu[];
+};
+
+static inline struct perf_counts_values*
+perf_counts(struct perf_counts *counts, int cpu)
+{
+	return &counts->cpu[cpu];
+}
+
 void update_stats(struct stats *stats, u64 val);
 double avg_stats(struct stats *stats);
 double stddev_stats(struct stats *stats);