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authorEugenio Pérez <eperezma@redhat.com>2020-04-18 12:22:12 +0200
committerMichael S. Tsirkin <mst@redhat.com>2020-06-22 12:34:21 -0400
commit7add78b2a6b76d98fcf35e981c5f84b3c91459f5 (patch)
treeb327eb74c25b21df88379f7027915743ed6b2104 /tools
parent633fae33d562dc2538cc3d6033a2d5e277050783 (diff)
downloadlinux-7add78b2a6b76d98fcf35e981c5f84b3c91459f5.tar.bz2
tools/virtio: Add --batch=random option
So we can test with non-deterministic batches in flight. Signed-off-by: Eugenio Pérez <eperezma@redhat.com> Link: https://lore.kernel.org/r/20200418102217.32327-4-eperezma@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/virtio/virtio_test.c18
1 files changed, 14 insertions, 4 deletions
diff --git a/tools/virtio/virtio_test.c b/tools/virtio/virtio_test.c
index c30de9088f3c..4a2b9d11f287 100644
--- a/tools/virtio/virtio_test.c
+++ b/tools/virtio/virtio_test.c
@@ -19,6 +19,8 @@
#include <linux/virtio_ring.h>
#include "../../drivers/vhost/test.h"
+#define RANDOM_BATCH -1
+
/* Unused */
void *__kmalloc_fake, *__kfree_ignore_start, *__kfree_ignore_end;
@@ -161,6 +163,7 @@ static void run_test(struct vdev_info *dev, struct vq_info *vq,
int r, test = 1;
unsigned len;
long long spurious = 0;
+ const bool random_batch = batch == RANDOM_BATCH;
r = ioctl(dev->control, VHOST_TEST_RUN, &test);
assert(r >= 0);
for (;;) {
@@ -168,6 +171,9 @@ static void run_test(struct vdev_info *dev, struct vq_info *vq,
completed_before = completed;
started_before = started;
do {
+ if (random_batch)
+ batch = (random() % vq->vring.num) + 1;
+
while (started < bufs &&
(started - completed) < batch) {
sg_init_one(&sl, dev->buf, dev->buf_size);
@@ -275,7 +281,7 @@ static void help(void)
" [--no-event-idx]"
" [--no-virtio-1]"
" [--delayed-interrupt]"
- " [--batch=N]"
+ " [--batch=random/N]"
"\n");
}
@@ -312,9 +318,13 @@ int main(int argc, char **argv)
delayed = true;
break;
case 'b':
- batch = strtol(optarg, NULL, 10);
- assert(batch > 0);
- assert(batch < (long)INT_MAX + 1);
+ if (0 == strcmp(optarg, "random")) {
+ batch = RANDOM_BATCH;
+ } else {
+ batch = strtol(optarg, NULL, 10);
+ assert(batch > 0);
+ assert(batch < (long)INT_MAX + 1);
+ }
break;
default:
assert(0);