From: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Transparent Hugepages confuse the page accounting in the
test suite. Add an option to memhog (-H) to disable them.
---
memhog.c | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/memhog.c b/memhog.c
index 2bc4251..b22f097 100755
--- a/memhog.c
+++ b/memhog.c
@@ -20,6 +20,7 @@
#include <sys/mman.h>
#include <sys/fcntl.h>
#include <string.h>
+#include <stdbool.h>
#include "numa.h"
#include "numaif.h"
#include "util.h"
@@ -37,6 +38,7 @@ void usage(void)
{
printf("memhog [-rNUM] size[kmg] [policy [nodeset]]\n");
printf("-rNUM repeat memset NUM times\n");
+ printf("-H disable transparent hugepages\n");
print_policies();
exit(1);
}
@@ -66,6 +68,7 @@ int main(int ac, char **av)
int loose = 0;
int i;
int fd = -1;
+ bool disable_hugepage = false;
nodes = numa_allocate_nodemask();
gnodes = numa_allocate_nodemask();
@@ -80,6 +83,9 @@ int main(int ac, char **av)
case 'r':
repeat = atoi(av[1] + 2);
break;
+ case 'H':
+ disable_hugepage = true;
+ break;
default:
usage();
}
@@ -113,6 +119,9 @@ int main(int ac, char **av)
if (mbind(map, length, policy, nodes->maskp, nodes->size, 0) < 0)
terr("mbind");
+
+ if (disable_hugepage)
+ madvise(map, length, MADV_NOHUGEPAGE);
gpolicy = -1;
if (get_mempolicy(&gpolicy, gnodes->maskp, gnodes->size, map, MPOL_F_ADDR) < 0)
--
1.7.5.4
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