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virtio/tools: add delayed interupt mode

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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2012-04-16 10:11:12 -04:00
parent e4ae004b84
commit 64d098886e
2 changed files with 23 additions and 4 deletions
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1
tools/virtio/linux/virtio.h
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@ -203,6 +203,7 @@ void *virtqueue_get_buf(struct virtqueue *vq, unsigned int *len);
void virtqueue_disable_cb(struct virtqueue *vq); void virtqueue_disable_cb(struct virtqueue *vq);
bool virtqueue_enable_cb(struct virtqueue *vq); bool virtqueue_enable_cb(struct virtqueue *vq);
bool virtqueue_enable_cb_delayed(struct virtqueue *vq);
void *virtqueue_detach_unused_buf(struct virtqueue *vq); void *virtqueue_detach_unused_buf(struct virtqueue *vq);
struct virtqueue *vring_new_virtqueue(unsigned int num, struct virtqueue *vring_new_virtqueue(unsigned int num,

26
tools/virtio/virtio_test.c
View File

@ -144,7 +144,8 @@ static void wait_for_interrupt(struct vdev_info *dev)
} }
} }
static void run_test(struct vdev_info *dev, struct vq_info *vq, int bufs) static void run_test(struct vdev_info *dev, struct vq_info *vq,
bool delayed, int bufs)
{ {
struct scatterlist sl; struct scatterlist sl;
long started = 0, completed = 0; long started = 0, completed = 0;
@ -183,8 +184,12 @@ static void run_test(struct vdev_info *dev, struct vq_info *vq, int bufs)
assert(started <= bufs); assert(started <= bufs);
if (completed == bufs) if (completed == bufs)
break; break;
if (virtqueue_enable_cb(vq->vq)) { if (delayed) {
wait_for_interrupt(dev); if (virtqueue_enable_cb_delayed(vq->vq))
wait_for_interrupt(dev);
} else {
if (virtqueue_enable_cb(vq->vq))
wait_for_interrupt(dev);
} }
} }
test = 0; test = 0;
@ -215,6 +220,14 @@ const struct option longopts[] = {
.name = "no-indirect", .name = "no-indirect",
.val = 'i', .val = 'i',
}, },
{
.name = "delayed-interrupt",
.val = 'D',
},
{
.name = "no-delayed-interrupt",
.val = 'd',
},
{ {
} }
}; };
@ -224,6 +237,7 @@ static void help()
fprintf(stderr, "Usage: virtio_test [--help]" fprintf(stderr, "Usage: virtio_test [--help]"
" [--no-indirect]" " [--no-indirect]"
" [--no-event-idx]" " [--no-event-idx]"
" [--delayed-interrupt]"
"\n"); "\n");
} }
@ -233,6 +247,7 @@ int main(int argc, char **argv)
unsigned long long features = (1ULL << VIRTIO_RING_F_INDIRECT_DESC) | unsigned long long features = (1ULL << VIRTIO_RING_F_INDIRECT_DESC) |
(1ULL << VIRTIO_RING_F_EVENT_IDX); (1ULL << VIRTIO_RING_F_EVENT_IDX);
int o; int o;
bool delayed = false;
for (;;) { for (;;) {
o = getopt_long(argc, argv, optstring, longopts, NULL); o = getopt_long(argc, argv, optstring, longopts, NULL);
@ -251,6 +266,9 @@ int main(int argc, char **argv)
case 'i': case 'i':
features &= ~(1ULL << VIRTIO_RING_F_INDIRECT_DESC); features &= ~(1ULL << VIRTIO_RING_F_INDIRECT_DESC);
break; break;
case 'D':
delayed = true;
break;
default: default:
assert(0); assert(0);
break; break;
@ -260,6 +278,6 @@ int main(int argc, char **argv)
done: done:
vdev_info_init(&dev, features); vdev_info_init(&dev, features);
vq_info_add(&dev, 256); vq_info_add(&dev, 256);
run_test(&dev, &dev.vqs[0], 0x100000); run_test(&dev, &dev.vqs[0], delayed, 0x100000);
return 0; return 0;
} }