Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 141 insertions, 0 deletions

diff --git a/tools/testing/selftests/resctrl/cmt_test.c b/tools/testing/selftests/resctrl/cmt_test.c
new file mode 100644
index 0000000000..50bdbce9fb
--- /dev/null
+++ b/tools/testing/selftests/resctrl/cmt_test.c
@@ -0,0 +1,141 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Cache Monitoring Technology (CMT) test
+ *
+ * Copyright (C) 2018 Intel Corporation
+ *
+ * Authors:
+ *    Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>,
+ *    Fenghua Yu <fenghua.yu@intel.com>
+ */
+#include "resctrl.h"
+#include <unistd.h>
+
+#define RESULT_FILE_NAME	"result_cmt"
+#define NUM_OF_RUNS		5
+#define MAX_DIFF		2000000
+#define MAX_DIFF_PERCENT	15
+
+static int cmt_setup(struct resctrl_val_param *p)
+{
+	/* Run NUM_OF_RUNS times */
+	if (p->num_of_runs >= NUM_OF_RUNS)
+		return END_OF_TESTS;
+
+	p->num_of_runs++;
+
+	return 0;
+}
+
+static int check_results(struct resctrl_val_param *param, size_t span, int no_of_bits)
+{
+	char *token_array[8], temp[512];
+	unsigned long sum_llc_occu_resc = 0;
+	int runs = 0;
+	FILE *fp;
+
+	ksft_print_msg("Checking for pass/fail\n");
+	fp = fopen(param->filename, "r");
+	if (!fp) {
+		perror("# Error in opening file\n");
+
+		return errno;
+	}
+
+	while (fgets(temp, sizeof(temp), fp)) {
+		char *token = strtok(temp, ":\t");
+		int fields = 0;
+
+		while (token) {
+			token_array[fields++] = token;
+			token = strtok(NULL, ":\t");
+		}
+
+		/* Field 3 is llc occ resc value */
+		if (runs > 0)
+			sum_llc_occu_resc += strtoul(token_array[3], NULL, 0);
+		runs++;
+	}
+	fclose(fp);
+
+	return show_cache_info(sum_llc_occu_resc, no_of_bits, span,
+			       MAX_DIFF, MAX_DIFF_PERCENT, runs - 1,
+			       true, true);
+}
+
+void cmt_test_cleanup(void)
+{
+	remove(RESULT_FILE_NAME);
+}
+
+int cmt_resctrl_val(int cpu_no, int n, const char * const *benchmark_cmd)
+{
+	const char * const *cmd = benchmark_cmd;
+	const char *new_cmd[BENCHMARK_ARGS];
+	unsigned long cache_size = 0;
+	unsigned long long_mask;
+	char *span_str = NULL;
+	char cbm_mask[256];
+	int count_of_bits;
+	size_t span;
+	int ret, i;
+
+	ret = get_cbm_mask("L3", cbm_mask);
+	if (ret)
+		return ret;
+
+	long_mask = strtoul(cbm_mask, NULL, 16);
+
+	ret = get_cache_size(cpu_no, "L3", &cache_size);
+	if (ret)
+		return ret;
+	ksft_print_msg("Cache size :%lu\n", cache_size);
+
+	count_of_bits = count_bits(long_mask);
+
+	if (n < 1 || n > count_of_bits) {
+		ksft_print_msg("Invalid input value for numbr_of_bits n!\n");
+		ksft_print_msg("Please enter value in range 1 to %d\n", count_of_bits);
+		return -1;
+	}
+
+	struct resctrl_val_param param = {
+		.resctrl_val	= CMT_STR,
+		.ctrlgrp	= "c1",
+		.mongrp		= "m1",
+		.cpu_no		= cpu_no,
+		.filename	= RESULT_FILE_NAME,
+		.mask		= ~(long_mask << n) & long_mask,
+		.num_of_runs	= 0,
+		.setup		= cmt_setup,
+	};
+
+	span = cache_size * n / count_of_bits;
+
+	if (strcmp(cmd[0], "fill_buf") == 0) {
+		/* Duplicate the command to be able to replace span in it */
+		for (i = 0; benchmark_cmd[i]; i++)
+			new_cmd[i] = benchmark_cmd[i];
+		new_cmd[i] = NULL;
+
+		ret = asprintf(&span_str, "%zu", span);
+		if (ret < 0)
+			return -1;
+		new_cmd[1] = span_str;
+		cmd = new_cmd;
+	}
+
+	remove(RESULT_FILE_NAME);
+
+	ret = resctrl_val(cmd, &param);
+	if (ret)
+		goto out;
+
+	ret = check_results(&param, span, n);
+
+out:
+	cmt_test_cleanup();
+	free(span_str);
+
+	return ret;
+}