Improve kernel_pf

1 files changed, 4 insertions, 13 deletions

diff --git a/kernel_pf.c b/kernel_pf.c
index 0e0d5d6..20f9784 100644
--- a/kernel_pf.c
+++ b/kernel_pf.c
@@ -17,30 +17,21 @@ static uint64_t faults = 0;
 
 static void iter(void)
 {
-	void *addr = mmap(NULL, NPAGES * PAGE_SIZE, PROT_READ|PROT_WRITE,
-			  MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
-	if (addr == MAP_FAILED)
-		err(1, "mmap");
-
-	for (int i = 0; i < NPAGES; i++)
-		clock_getres(CLOCK_REALTIME, addr + i * PAGE_SIZE);
-
-	munmap(addr, NPAGES * PAGE_SIZE);
-
-	faults += NPAGES;
+	clock_getres(CLOCK_REALTIME, (void *)8);
+	faults++;
 }
 
 int main(int argc, char **argv)
 {
 	// Warm up
-	for (int i = 0; i < 1000; i++)
+	for (int i = 0; i < 1000000; i++)
 		iter();
 	faults = 0;
 
 	struct timespec start;
 	clock_gettime(CLOCK_MONOTONIC, &start);
 
-	for (int i = 0; i < 1000; i++)
+	for (int i = 0; i < 1000000; i++)
 		iter();
 
 	struct timespec end;