Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 289 insertions, 0 deletions

diff --git a/kernel/tools/perf/builtin-bench.c b/kernel/tools/perf/builtin-bench.c
new file mode 100644
index 000000000..b9a56fa83
--- /dev/null
+++ b/kernel/tools/perf/builtin-bench.c
@@ -0,0 +1,289 @@
+/*
+ * builtin-bench.c
+ *
+ * General benchmarking collections provided by perf
+ *
+ * Copyright (C) 2009, Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
+ */
+
+/*
+ * Available benchmark collection list:
+ *
+ *  sched ... scheduler and IPC performance
+ *  mem   ... memory access performance
+ *  numa  ... NUMA scheduling and MM performance
+ *  futex ... Futex performance
+ */
+#include "perf.h"
+#include "util/util.h"
+#include "util/parse-options.h"
+#include "builtin.h"
+#include "bench/bench.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/prctl.h>
+
+typedef int (*bench_fn_t)(int argc, const char **argv, const char *prefix);
+
+struct bench {
+	const char	*name;
+	const char	*summary;
+	bench_fn_t	fn;
+};
+
+#ifdef HAVE_LIBNUMA_SUPPORT
+static struct bench numa_benchmarks[] = {
+	{ "mem",	"Benchmark for NUMA workloads",			bench_numa		},
+	{ "all",	"Test all NUMA benchmarks",			NULL			},
+	{ NULL,		NULL,						NULL			}
+};
+#endif
+
+static struct bench sched_benchmarks[] = {
+	{ "messaging",	"Benchmark for scheduling and IPC",		bench_sched_messaging	},
+	{ "pipe",	"Benchmark for pipe() between two processes",	bench_sched_pipe	},
+	{ "all",	"Test all scheduler benchmarks",		NULL			},
+	{ NULL,		NULL,						NULL			}
+};
+
+static struct bench mem_benchmarks[] = {
+	{ "memcpy",	"Benchmark for memcpy()",			bench_mem_memcpy	},
+	{ "memset",	"Benchmark for memset() tests",			bench_mem_memset	},
+	{ "all",	"Test all memory benchmarks",			NULL			},
+	{ NULL,		NULL,						NULL			}
+};
+
+static struct bench futex_benchmarks[] = {
+	{ "hash",	"Benchmark for futex hash table",               bench_futex_hash	},
+	{ "wake",	"Benchmark for futex wake calls",               bench_futex_wake	},
+	{ "requeue",	"Benchmark for futex requeue calls",            bench_futex_requeue	},
+	{ "all",	"Test all futex benchmarks",			NULL			},
+	{ NULL,		NULL,						NULL			}
+};
+
+struct collection {
+	const char	*name;
+	const char	*summary;
+	struct bench	*benchmarks;
+};
+
+static struct collection collections[] = {
+	{ "sched",	"Scheduler and IPC benchmarks",			sched_benchmarks	},
+	{ "mem",	"Memory access benchmarks",			mem_benchmarks		},
+#ifdef HAVE_LIBNUMA_SUPPORT
+	{ "numa",	"NUMA scheduling and MM benchmarks",		numa_benchmarks		},
+#endif
+	{"futex",       "Futex stressing benchmarks",                   futex_benchmarks        },
+	{ "all",	"All benchmarks",				NULL			},
+	{ NULL,		NULL,						NULL			}
+};
+
+/* Iterate over all benchmark collections: */
+#define for_each_collection(coll) \
+	for (coll = collections; coll->name; coll++)
+
+/* Iterate over all benchmarks within a collection: */
+#define for_each_bench(coll, bench) \
+	for (bench = coll->benchmarks; bench && bench->name; bench++)
+
+static void dump_benchmarks(struct collection *coll)
+{
+	struct bench *bench;
+
+	printf("\n        # List of available benchmarks for collection '%s':\n\n", coll->name);
+
+	for_each_bench(coll, bench)
+		printf("%14s: %s\n", bench->name, bench->summary);
+
+	printf("\n");
+}
+
+static const char *bench_format_str;
+
+/* Output/formatting style, exported to benchmark modules: */
+int bench_format = BENCH_FORMAT_DEFAULT;
+unsigned int bench_repeat = 10; /* default number of times to repeat the run */
+
+static const struct option bench_options[] = {
+	OPT_STRING('f', "format", &bench_format_str, "default", "Specify format style"),
+	OPT_UINTEGER('r', "repeat",  &bench_repeat,   "Specify amount of times to repeat the run"),
+	OPT_END()
+};
+
+static const char * const bench_usage[] = {
+	"perf bench [<common options>] <collection> <benchmark> [<options>]",
+	NULL
+};
+
+static void print_usage(void)
+{
+	struct collection *coll;
+	int i;
+
+	printf("Usage: \n");
+	for (i = 0; bench_usage[i]; i++)
+		printf("\t%s\n", bench_usage[i]);
+	printf("\n");
+
+	printf("        # List of all available benchmark collections:\n\n");
+
+	for_each_collection(coll)
+		printf("%14s: %s\n", coll->name, coll->summary);
+	printf("\n");
+}
+
+static int bench_str2int(const char *str)
+{
+	if (!str)
+		return BENCH_FORMAT_DEFAULT;
+
+	if (!strcmp(str, BENCH_FORMAT_DEFAULT_STR))
+		return BENCH_FORMAT_DEFAULT;
+	else if (!strcmp(str, BENCH_FORMAT_SIMPLE_STR))
+		return BENCH_FORMAT_SIMPLE;
+
+	return BENCH_FORMAT_UNKNOWN;
+}
+
+/*
+ * Run a specific benchmark but first rename the running task's ->comm[]
+ * to something meaningful:
+ */
+static int run_bench(const char *coll_name, const char *bench_name, bench_fn_t fn,
+		     int argc, const char **argv, const char *prefix)
+{
+	int size;
+	char *name;
+	int ret;
+
+	size = strlen(coll_name) + 1 + strlen(bench_name) + 1;
+
+	name = zalloc(size);
+	BUG_ON(!name);
+
+	scnprintf(name, size, "%s-%s", coll_name, bench_name);
+
+	prctl(PR_SET_NAME, name);
+	argv[0] = name;
+
+	ret = fn(argc, argv, prefix);
+
+	free(name);
+
+	return ret;
+}
+
+static void run_collection(struct collection *coll)
+{
+	struct bench *bench;
+	const char *argv[2];
+
+	argv[1] = NULL;
+	/*
+	 * TODO:
+	 *
+	 * Preparing preset parameters for
+	 * embedded, ordinary PC, HPC, etc...
+	 * would be helpful.
+	 */
+	for_each_bench(coll, bench) {
+		if (!bench->fn)
+			break;
+		printf("# Running %s/%s benchmark...\n", coll->name, bench->name);
+		fflush(stdout);
+
+		argv[1] = bench->name;
+		run_bench(coll->name, bench->name, bench->fn, 1, argv, NULL);
+		printf("\n");
+	}
+}
+
+static void run_all_collections(void)
+{
+	struct collection *coll;
+
+	for_each_collection(coll)
+		run_collection(coll);
+}
+
+int cmd_bench(int argc, const char **argv, const char *prefix __maybe_unused)
+{
+	struct collection *coll;
+	int ret = 0;
+
+	if (argc < 2) {
+		/* No collection specified. */
+		print_usage();
+		goto end;
+	}
+
+	argc = parse_options(argc, argv, bench_options, bench_usage,
+			     PARSE_OPT_STOP_AT_NON_OPTION);
+
+	bench_format = bench_str2int(bench_format_str);
+	if (bench_format == BENCH_FORMAT_UNKNOWN) {
+		printf("Unknown format descriptor: '%s'\n", bench_format_str);
+		goto end;
+	}
+
+	if (bench_repeat == 0) {
+		printf("Invalid repeat option: Must specify a positive value\n");
+		goto end;
+	}
+
+	if (argc < 1) {
+		print_usage();
+		goto end;
+	}
+
+	if (!strcmp(argv[0], "all")) {
+		run_all_collections();
+		goto end;
+	}
+
+	for_each_collection(coll) {
+		struct bench *bench;
+
+		if (strcmp(coll->name, argv[0]))
+			continue;
+
+		if (argc < 2) {
+			/* No bench specified. */
+			dump_benchmarks(coll);
+			goto end;
+		}
+
+		if (!strcmp(argv[1], "all")) {
+			run_collection(coll);
+			goto end;
+		}
+
+		for_each_bench(coll, bench) {
+			if (strcmp(bench->name, argv[1]))
+				continue;
+
+			if (bench_format == BENCH_FORMAT_DEFAULT)
+				printf("# Running '%s/%s' benchmark:\n", coll->name, bench->name);
+			fflush(stdout);
+			ret = run_bench(coll->name, bench->name, bench->fn, argc-1, argv+1, prefix);
+			goto end;
+		}
+
+		if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
+			dump_benchmarks(coll);
+			goto end;
+		}
+
+		printf("Unknown benchmark: '%s' for collection '%s'\n", argv[1], argv[0]);
+		ret = 1;
+		goto end;
+	}
+
+	printf("Unknown collection: '%s'\n", argv[0]);
+	ret = 1;
+
+end:
+	return ret;
+}