From 0c63e8b7b97fb72ef38c8edbfbe751d3602e03a1 Mon Sep 17 00:00:00 2001
From: Michael Ellerman <mpe@ellerman.id.au>
Date: Thu, 2 Jun 2016 22:02:01 +1000
Subject: [PATCH] selftests/powerpc: Import Anton's mmap & futex micro
 benchmarks

These are useful little loops for smoke testing performance.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
 .../selftests/powerpc/benchmarks/.gitignore   |  2 +
 .../selftests/powerpc/benchmarks/Makefile     |  2 +-
 .../powerpc/benchmarks/futex_bench.c          | 42 +++++++++++++++++++
 .../selftests/powerpc/benchmarks/mmap_bench.c | 41 ++++++++++++++++++
 4 files changed, 86 insertions(+), 1 deletion(-)
 create mode 100644 tools/testing/selftests/powerpc/benchmarks/futex_bench.c
 create mode 100644 tools/testing/selftests/powerpc/benchmarks/mmap_bench.c

diff --git a/tools/testing/selftests/powerpc/benchmarks/.gitignore b/tools/testing/selftests/powerpc/benchmarks/.gitignore
index 6fa673316ac2..bce49ebd869e 100644
--- a/tools/testing/selftests/powerpc/benchmarks/.gitignore
+++ b/tools/testing/selftests/powerpc/benchmarks/.gitignore
@@ -1,2 +1,4 @@
 gettimeofday
 context_switch
+mmap_bench
+futex_bench
\ No newline at end of file
diff --git a/tools/testing/selftests/powerpc/benchmarks/Makefile b/tools/testing/selftests/powerpc/benchmarks/Makefile
index 6816fc2140cb..a9adfb7de78f 100644
--- a/tools/testing/selftests/powerpc/benchmarks/Makefile
+++ b/tools/testing/selftests/powerpc/benchmarks/Makefile
@@ -1,4 +1,4 @@
-TEST_PROGS := gettimeofday context_switch
+TEST_PROGS := gettimeofday context_switch mmap_bench futex_bench
 
 CFLAGS += -O2
 
diff --git a/tools/testing/selftests/powerpc/benchmarks/futex_bench.c b/tools/testing/selftests/powerpc/benchmarks/futex_bench.c
new file mode 100644
index 000000000000..2fc711d9150d
--- /dev/null
+++ b/tools/testing/selftests/powerpc/benchmarks/futex_bench.c
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2016, Anton Blanchard, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <sys/syscall.h>
+#include <time.h>
+#include <unistd.h>
+#include <linux/futex.h>
+
+#include "utils.h"
+
+#define ITERATIONS 100000000
+
+#define futex(A, B, C, D, E, F)	 syscall(__NR_futex, A, B, C, D, E, F)
+
+int test_futex(void)
+{
+	struct timespec ts_start, ts_end;
+	unsigned long i = ITERATIONS;
+
+	clock_gettime(CLOCK_MONOTONIC, &ts_start);
+
+	while (i--) {
+		unsigned int addr = 0;
+		futex(&addr, FUTEX_WAKE, 1, NULL, NULL, 0);
+	}
+
+	clock_gettime(CLOCK_MONOTONIC, &ts_end);
+
+	printf("time = %.6f\n", ts_end.tv_sec - ts_start.tv_sec + (ts_end.tv_nsec - ts_start.tv_nsec) / 1e9);
+
+	return 0;
+}
+
+int main(void)
+{
+	return test_harness(test_futex, "futex_bench");
+}
diff --git a/tools/testing/selftests/powerpc/benchmarks/mmap_bench.c b/tools/testing/selftests/powerpc/benchmarks/mmap_bench.c
new file mode 100644
index 000000000000..8d084a2d6e74
--- /dev/null
+++ b/tools/testing/selftests/powerpc/benchmarks/mmap_bench.c
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2016, Anton Blanchard, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+#include <time.h>
+
+#include "utils.h"
+
+#define ITERATIONS 5000000
+
+#define MEMSIZE (128 * 1024 * 1024)
+
+int test_mmap(void)
+{
+	struct timespec ts_start, ts_end;
+	unsigned long i = ITERATIONS;
+
+	clock_gettime(CLOCK_MONOTONIC, &ts_start);
+
+	while (i--) {
+		char *c = mmap(NULL, MEMSIZE, PROT_READ|PROT_WRITE,
+			       MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
+		FAIL_IF(c == MAP_FAILED);
+		munmap(c, MEMSIZE);
+	}
+
+	clock_gettime(CLOCK_MONOTONIC, &ts_end);
+
+	printf("time = %.6f\n", ts_end.tv_sec - ts_start.tv_sec + (ts_end.tv_nsec - ts_start.tv_nsec) / 1e9);
+
+	return 0;
+}
+
+int main(void)
+{
+	return test_harness(test_mmap, "mmap_bench");
+}
-- 
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