test: Add testcase for #1001

Refs: #1001
Change-Id: I3edd750108bd3f887af1f0afe3f2651f1243062b

test/issues/1001/CT_002.c

@@ -0,0 +1,130 @@
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <linux/perf_event.h>
+#include "./test_chk.h"
+
+#include "./perf_tool.h"
+
+#define TEST_NAME "CT_002"
+
+#define NUM_CNTR 4
+
+int main(int argc, char **argv)
+{
+	int fds[NUM_CNTR];
+	long long tmp_count;
+	long long counts[NUM_CNTR];
+	__u32 configs[NUM_CNTR] = {
+		PERF_COUNT_HW_INSTRUCTIONS,
+		PERF_COUNT_HW_CACHE_REFERENCES,
+		PERF_COUNT_HW_CACHE_MISSES,
+		PERF_COUNT_HW_BRANCH_MISSES};
+	char *config_names[NUM_CNTR] = {
+		"INSTRUCTIONS",
+		"CACHE_REFERENCES",
+		"CACHE_MISSES",
+		"BRANCH_MISSES"};
+	struct perf_event_attr pe_attr;
+	int group_fd = -1;
+
+	int rc = 0;
+	int i = 0;
+	int chk_fail = 0;
+
+	printf("*** %s start *******************************\n", TEST_NAME);
+
+	// common config
+	memset(&pe_attr, 0, sizeof(struct perf_event_attr));
+	pe_attr.size = sizeof(struct perf_event_attr);
+	pe_attr.disabled = 1;
+	pe_attr.exclude_kernel = 1;
+	pe_attr.exclude_user = 0;
+	pe_attr.type = PERF_TYPE_HARDWARE;
+
+	chk_fail = 0;
+	// perf_event_open
+	for (i = 0; i < NUM_CNTR; i++) {
+		pe_attr.config = configs[i];
+
+		fds[i] = perf_event_open(&pe_attr, 0, -1, group_fd, 0);
+		if (fds[i] == -1) {
+			chk_fail = 1;
+			break;
+		}
+		if (group_fd == -1) {
+			group_fd = fds[i];
+		}
+	}
+	OKNG(chk_fail != 0, "perf_event_open for %d counters", NUM_CNTR);
+
+	// reset counters
+	for (i = 0; i < NUM_CNTR; i++) {
+		rc = ioctl(fds[i], PERF_EVENT_IOC_RESET, 0);
+		CHKANDJUMP(rc != 0, "ioctl RESET");
+	}
+
+	chk_fail = 0;
+	// read counters at first
+	for (i = 0; i < NUM_CNTR; i++) {
+		rc = read(fds[i], &tmp_count, sizeof(long long));
+		CHKANDJUMP(rc == -1, "read counter[%d]", i);
+		printf("%-16s: %ld\n", config_names[i], tmp_count);
+		if (tmp_count != 0) {
+			chk_fail = 1;
+			break;
+		}
+	}
+	OKNG(chk_fail != 0, "Reset counters to 0");
+
+	// start counters at once
+	rc = ioctl(group_fd, PERF_EVENT_IOC_ENABLE, PERF_IOC_FLAG_GROUP);
+	OKNG(rc != 0, "Start counters at once");
+
+	// monitoring target
+	printf("  do some processing...\n");
+	calc_task();
+	memory_task();
+
+	// stop counters at once
+	rc = ioctl(group_fd, PERF_EVENT_IOC_DISABLE, PERF_IOC_FLAG_GROUP);
+	OKNG(rc != 0, "Stop counters at once");
+
+	printf("  counted values are as belows...\n");
+	// read counters after processing
+	for (i = 0; i < NUM_CNTR; i++) {
+		rc = read(fds[i], &tmp_count, sizeof(long long));
+		CHKANDJUMP(rc == -1, "read counter[%d]", i);
+		printf("%-16s: %ld\n", config_names[i], tmp_count);
+		counts[i] = tmp_count;
+	}
+
+	printf("  processing again... (to check if counters are stopped)\n");
+	// processing again (counters are stopped)
+	calc_task();
+	memory_task();
+
+	printf("  current values are as bellow\n"
+		"  (expected to be same value as last time)\n");
+
+	chk_fail = 0;
+	// read counters again to check if counters were stopped
+	for (i = 0; i < NUM_CNTR; i++) {
+		rc = read(fds[i], &tmp_count, sizeof(long long));
+		printf("%-16s: %ld\n", config_names[i], tmp_count);
+		if (counts[i] != tmp_count) {
+			chk_fail = 1;
+			break;
+		}
+	}
+	OKNG(chk_fail != 0, "Counters are stopped");
+
+	printf("*** %s PASSED\n\n", TEST_NAME);
+
+	return 0;
+
+fn_fail:
+	printf("*** %s FAILED\n\n", TEST_NAME);
+
+	return -1;
+}