Commit be68fb64 authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Michael Ellerman

selftest/powerpc: Add additional option to mmap_bench test

This patch adds --pgfault and --iterations options to mmap_bench test. With
--pgfault we touch every page mapped. This helps in measuring impact in the
page fault path with a patch series.
Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 10527e80
...@@ -7,17 +7,34 @@ ...@@ -7,17 +7,34 @@
#include <stdlib.h> #include <stdlib.h>
#include <sys/mman.h> #include <sys/mman.h>
#include <time.h> #include <time.h>
#include <getopt.h>
#include "utils.h" #include "utils.h"
#define ITERATIONS 5000000 #define ITERATIONS 5000000
#define MEMSIZE (128 * 1024 * 1024) #define MEMSIZE (1UL << 27)
#define PAGE_SIZE (1UL << 16)
#define CHUNK_COUNT (MEMSIZE/PAGE_SIZE)
static int pg_fault;
static int iterations = ITERATIONS;
static struct option options[] = {
{ "pgfault", no_argument, &pg_fault, 1 },
{ "iterations", required_argument, 0, 'i' },
{ 0, },
};
static void usage(void)
{
printf("mmap_bench <--pgfault> <--iterations count>\n");
}
int test_mmap(void) int test_mmap(void)
{ {
struct timespec ts_start, ts_end; struct timespec ts_start, ts_end;
unsigned long i = ITERATIONS; unsigned long i = iterations;
clock_gettime(CLOCK_MONOTONIC, &ts_start); clock_gettime(CLOCK_MONOTONIC, &ts_start);
...@@ -25,6 +42,11 @@ int test_mmap(void) ...@@ -25,6 +42,11 @@ int test_mmap(void)
char *c = mmap(NULL, MEMSIZE, PROT_READ|PROT_WRITE, char *c = mmap(NULL, MEMSIZE, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
FAIL_IF(c == MAP_FAILED); FAIL_IF(c == MAP_FAILED);
if (pg_fault) {
int count;
for (count = 0; count < CHUNK_COUNT; count++)
c[count << 16] = 'c';
}
munmap(c, MEMSIZE); munmap(c, MEMSIZE);
} }
...@@ -35,7 +57,32 @@ int test_mmap(void) ...@@ -35,7 +57,32 @@ int test_mmap(void)
return 0; return 0;
} }
int main(void) int main(int argc, char *argv[])
{ {
signed char c;
while (1) {
int option_index = 0;
c = getopt_long(argc, argv, "", options, &option_index);
if (c == -1)
break;
switch (c) {
case 0:
if (options[option_index].flag != 0)
break;
usage();
exit(1);
break;
case 'i':
iterations = atoi(optarg);
break;
default:
usage();
exit(1);
}
}
return test_harness(test_mmap, "mmap_bench"); return test_harness(test_mmap, "mmap_bench");
} }
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