Commit 0c63e8b7 authored by Michael Ellerman's avatar Michael Ellerman
Browse files

selftests/powerpc: Import Anton's mmap & futex micro benchmarks 



These are useful little loops for smoke testing performance.

Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent f2418ae8

tools/testing/selftests/powerpc/benchmarks/.gitignore

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gettimeofday

context_switch

mmap_bench

futex_bench
 
 No newline at end of file

tools/testing/selftests/powerpc/benchmarks/Makefile

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TEST_PROGS := gettimeofday context_switch

TEST_PROGS := gettimeofday context_switch mmap_bench futex_bench



CFLAGS += -O2

tools/testing/selftests/powerpc/benchmarks/futex_bench.c

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/*

 * 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");

}

tools/testing/selftests/powerpc/benchmarks/mmap_bench.c

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/*

 * 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");

}