diff options
| author | Rusty Russell <rusty@rustcorp.com.au> | 2013-03-20 15:44:26 +1030 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2013-03-20 15:44:53 +1030 |
| commit | e538ebaf78455ff87dec2c34d4f9c128844e3f3f (patch) | |
| tree | 1f464016f21f575cdb6ece7940a6ef868438133f /tools/virtio | |
| parent | 282edb36499042a92b71f052f51754ae7ed936e4 (diff) | |
| download | lwn-e538ebaf78455ff87dec2c34d4f9c128844e3f3f.tar.gz lwn-e538ebaf78455ff87dec2c34d4f9c128844e3f3f.zip | |
tools/virtio: make vringh_test use inbuf/outbuf.
As expected, the simplified accessors are faster.
for i in `seq 50`; do /usr/bin/time -f 'Wall time:%e' ./vringh_test --indirect --eventidx --parallel --fast-vringh; done 2>&1 | stats --trim-outliers:
Before:
Using CPUS 0 and 3
Guest: notified 0, pinged 39062-39063(39063)
Host: notified 39062-39063(39063), pinged 0
Wall time:1.760000-2.220000(1.789167)
After:
Using CPUS 0 and 3
Guest: notified 0, pinged 39037-39063(39062)
Host: notified 39037-39063(39062), pinged 0
Wall time:1.640000-1.810000(1.676875)
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'tools/virtio')
| -rw-r--r-- | tools/virtio/linux/virtio.h | 10 | ||||
| -rw-r--r-- | tools/virtio/vringh_test.c | 8 |
2 files changed, 14 insertions, 4 deletions
diff --git a/tools/virtio/linux/virtio.h b/tools/virtio/linux/virtio.h index 5fa612ad932c..6df181a6bcc6 100644 --- a/tools/virtio/linux/virtio.h +++ b/tools/virtio/linux/virtio.h @@ -63,6 +63,16 @@ int virtqueue_add_sgs(struct virtqueue *vq, void *data, gfp_t gfp); +int virtqueue_add_outbuf(struct virtqueue *vq, + struct scatterlist sg[], unsigned int num, + void *data, + gfp_t gfp); + +int virtqueue_add_inbuf(struct virtqueue *vq, + struct scatterlist sg[], unsigned int num, + void *data, + gfp_t gfp); + void virtqueue_kick(struct virtqueue *vq); void *virtqueue_get_buf(struct virtqueue *vq, unsigned int *len); diff --git a/tools/virtio/vringh_test.c b/tools/virtio/vringh_test.c index 6a48ca5c101f..bb0bd9403e9e 100644 --- a/tools/virtio/vringh_test.c +++ b/tools/virtio/vringh_test.c @@ -369,11 +369,11 @@ static int parallel_test(unsigned long features, * user addr */ __kmalloc_fake = indirects + (xfers % RINGSIZE) * 4; if (output) - err = virtqueue_add_buf(vq, sg, num_sg, 0, dbuf, - GFP_KERNEL); + err = virtqueue_add_outbuf(vq, sg, num_sg, dbuf, + GFP_KERNEL); else - err = virtqueue_add_buf(vq, sg, 0, num_sg, dbuf, - GFP_KERNEL); + err = virtqueue_add_inbuf(vq, sg, num_sg, + dbuf, GFP_KERNEL); if (err == -ENOSPC) { if (!virtqueue_enable_cb_delayed(vq)) |