From e538ebaf78455ff87dec2c34d4f9c128844e3f3f Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Wed, 20 Mar 2013 15:44:26 +1030 Subject: 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 --- tools/virtio/vringh_test.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'tools/virtio/vringh_test.c') 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)) -- cgit v1.2.1