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authorRusty Russell <rusty@rustcorp.com.au>2013-03-20 15:44:26 +1030
committerRusty Russell <rusty@rustcorp.com.au>2013-03-20 15:44:53 +1030
commite538ebaf78455ff87dec2c34d4f9c128844e3f3f (patch)
tree1f464016f21f575cdb6ece7940a6ef868438133f /tools/virtio
parent282edb36499042a92b71f052f51754ae7ed936e4 (diff)
downloadlinaro-lsk-e538ebaf78455ff87dec2c34d4f9c128844e3f3f.tar.gz
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.h10
-rw-r--r--tools/virtio/vringh_test.c8
2 files changed, 14 insertions, 4 deletions
diff --git a/tools/virtio/linux/virtio.h b/tools/virtio/linux/virtio.h
index 5fa612ad932..6df181a6bcc 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 6a48ca5c101..bb0bd9403e9 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))