linux-toradex.git/tools/virtio/linux/virtio.h, branch v3.10.78

tools/virtio: remove virtqueue_add_buf() from tests.

2013-03-20T05:15:07+00:00

Make the rest of the paths use virtqueue_add_sgs or add_outbuf.

Signed-off-by: Rusty Russell

tools/virtio: make vringh_test use inbuf/outbuf.

2013-03-20T05:14:53+00:00

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

virtio_ring: virtqueue_add_sgs, to add multiple sgs.

2013-03-20T05:13:29+00:00

virtio_scsi can really use this, to avoid the current hack of copying
the whole sg array.  Some other things get slightly neater, too.

This causes a slowdown in virtqueue_add_buf(), which is implemented as
a wrapper.  This is addressed in the next patches.

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 39009-39063(39062)
	Host: notified 39009-39063(39062), pinged 0
	Wall time:1.700000-1.950000(1.723542)

After:
	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)

Signed-off-by: Rusty Russell 
Reviewed-by: Wanlong Gao 
Reviewed-by: Asias He

tools/virtio: separate headers more.

2013-03-20T03:30:42+00:00

This makes them a bit more like the kernel headers, so we can include more
real kernel headers in our tests.

In addition this means that we don't break tools/virtio with the next
patch.

Signed-off-by: Rusty Russell

tools/virtio: fix build for 3.8

2013-03-20T03:30:41+00:00

Signed-off-by: Michael S. Tsirkin 
Signed-off-by: Rusty Russell

virtio/tools: add delayed interupt mode

2012-05-02T15:22:14+00:00

Signed-off-by: Michael S. Tsirkin

tools/virtio: stub out strong barriers

2012-02-28T07:13:16+00:00

The tool should never use them, abort if it does.

Signed-off-by: Michael S. Tsirkin

virtio: rename virtqueue_add_buf_gfp to virtqueue_add_buf

2012-01-12T05:14:42+00:00

Remove wrapper functions. This makes the allocation type explicit in
all callers; I used GPF_KERNEL where it seemed obvious, left it at
GFP_ATOMIC otherwise.

Signed-off-by: Rusty Russell 
Reviewed-by: Christoph Hellwig

virtio: harsher barriers for rpmsg.

2012-01-12T05:14:42+00:00

We were cheating with our barriers; using the smp ones rather than the
real device ones.  That was fine, until rpmsg came along, which is
used to talk to a real device (a non-SMP CPU).

Unfortunately, just putting back the real barriers (reverting
d57ed95d) causes a performance regression on virtio-pci.  In
particular, Amos reports netbench's TCP_RR over virtio_net CPU
utilization increased up to 35% while throughput went down by up to
14%.

By comparison, this branch is in the noise.

Reference: https://lkml.org/lkml/2011/12/11/22

Signed-off-by: Rusty Russell

tools/virtio: virtio_test tool

2010-12-09T14:00:22+00:00

This is the userspace part of the tool: it includes a bunch of stubs for
linux APIs, somewhat simular to linuxsched. This makes it possible to
recompile the ring code in userspace.

A small test example is implemented combining this with vhost_test
module.

Signed-off-by: Michael S. Tsirkin