perf_event_open: Add support for counting REF_CPU_CYCLES

Using thread's tsc count instead of performance counter

Refs: #1025
Change-Id: I1d7a18f1c52f1d52087002d31818638a6b206014

test/issues/1025/perf_case_e.c

@@ -0,0 +1,103 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <langinfo.h>
+#include <locale.h>
+#include <sys/mman.h>
+
+#include "perftool.h"
+
+#define IS_GROUP 1
+
+/* perf flow: Start -> calc -> Stop -> Read */
+
+void
+usage()
+{
+	printf("Usage: perf_case_a mode cntr_num [<type> <config>]...\n");
+	exit(1);
+}
+
+int
+main(int argc, char **argv)
+{
+	long fds[PERF_CNTR_NUM];
+	long long counts[PERF_CNTR_NUM + 1];
+	int types[PERF_CNTR_NUM];
+	int configs[PERF_CNTR_NUM];
+	int group_fd = -1;
+
+	int cntr_num;
+	int mode;
+	int i;
+
+	if (argc < 3) {
+		printf("ERROR: Too few arguments.\n");
+		usage();
+	}
+
+	mode = atoi(argv[1]);
+	cntr_num = atoi(argv[2]);
+
+	/* perse args */
+	if (argc < cntr_num * 2 + 2) {
+		printf("ERROR: Too few arguments.\n");
+		usage();
+	}
+
+	for (i = 0; i < cntr_num; i++) {
+		types[i] = atoi(argv[i * 2 + 3]);
+		configs[i] = atoi(argv[i * 2 + 4]);
+	}
+
+	/* perf_event_open */
+	for (i = 0; i < cntr_num; i++) {
+		fds[i] = pe_opener(group_fd, mode,
+			types[i], configs[i], IS_GROUP);
+		if (group_fd == -1) {
+			group_fd = fds[i];
+		}
+	}
+
+	/* perf_start */
+	PERF_BEGIN(group_fd, PERF_IOC_FLAG_GROUP);
+
+	/* calc */
+	calc_task();
+
+	/* perf_end */
+	PERF_END(group_fd, PERF_IOC_FLAG_GROUP);
+
+	/* calc (not counted) */
+	calc_task();
+
+	/* perf_restart */
+	PERF_START(group_fd, PERF_IOC_FLAG_GROUP);
+
+	/* calc */
+	calc_task();
+
+	/* perf_end and read */
+	PERF_END(group_fd, PERF_IOC_FLAG_GROUP);
+	PERF_READ(group_fd, counts, sizeof(counts));
+
+	for (i = 0; i < cntr_num; i++) {
+		close(fds[i]);
+	}
+
+	/* print result */
+	for (i = 0; i < counts[0]; i++) {
+		if (types[i] == PERF_TYPE_HARDWARE) {
+			printf("%s: %16ld\n",
+			       hw_event_names[configs[i]], counts[i + 1]);
+		}
+		else if (types[i] == PERF_TYPE_HW_CACHE) {
+			printf("%s_%s_%s: %16ld\n",
+			       id_names[(configs[i] >> 0) & 0xff],
+			       op_id_names[(configs[i] >> 8) & 0xff],
+			       result_names[(configs[i] >> 16) & 0xff],
+			       counts[i + 1]);
+		}
+	}
+
+	return 0;
+}