litmus-rt-ext-res.git/tools/virtio/ringtest, branch EXT-RES

tools/virtio/ringtest: fix run-on-all.sh for offline cpus

2017-01-26T07:24:46+00:00

commit 21f5eda9b8671744539c8295b9df62991fffb2ce upstream.

Since ef1b144d ("tools/virtio/ringtest: fix run-on-all.sh to work
without /dev/cpu") run-on-all.sh uses seq 0 $HOST_AFFINITY as the list
of ids of the CPUs to run the command on (assuming ids of online CPUs
are consecutive and start from 0), where $HOST_AFFINITY is the highest
CPU id in the system previously determined using lscpu.  This can fail
on systems with offline CPUs.

Instead let's use lscpu to determine the list of online CPUs.

Signed-off-by: Halil Pasic 
Fixes: ef1b144d ("tools/virtio/ringtest: fix run-on-all.sh to work without
/dev/cpu")
Reviewed-by: Sascha Silbe 
Signed-off-by: Cornelia Huck 
Signed-off-by: Greg Kroah-Hartman

ringtest: poll for new buffers once before updating event index

2016-10-30T22:21:43+00:00

Updating the event index has a memory barrier and causes more work
on the other side to actually signal the event.  It is unnecessary
if a new buffer has already appeared on the ring, so poll once before
doing the update.

The effect of this on the 0.9 ring implementation is pretty much
invisible, but on the new-style ring it provides a consistent 3%
performance improvement.

Signed-off-by: Paolo Bonzini 
Signed-off-by: Michael S. Tsirkin

ringtest: commonize implementation of poll_avail/poll_used

2016-10-30T22:21:43+00:00

Provide new primitives used_empty/avail_empty and
build poll_avail/poll_used on top of it.

Signed-off-by: Paolo Bonzini 
Signed-off-by: Michael S. Tsirkin

ringtest: use link-time optimization

2016-10-30T22:21:42+00:00

By using -flto and -fwhole-program, all functions from the ring implementation
can be treated as static and possibly inlined.  Force this to happen through
the GCC flatten attribute.

Signed-off-by: Paolo Bonzini 
Signed-off-by: Michael S. Tsirkin

ringtest: test build fix

2016-08-15T02:01:23+00:00

Recent changes to ptr_ring broke the ringtest
which lacks a likely() stub. Fix it up.

Fixes: 982fb490c298896d15e9323a882f34a57c11ff56
	("ptr_ring: support zero length ring")
Signed-off-by: Michael S. Tsirkin

ptr_ring: support resizing multiple queues

2016-07-01T09:32:17+00:00

Sometimes, we need support resizing multiple queues at once. This is
because it was not easy to recover to recover from a partial failure
of multiple queues resizing.

Signed-off-by: Michael S. Tsirkin 
Signed-off-by: Jason Wang 
Signed-off-by: David S. Miller

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2016-06-30T09:03:36+00:00

Several cases of overlapping changes, except the packet scheduler
conflicts which deal with the addition of the free list parameter
to qdisc_enqueue().

Signed-off-by: David S. Miller

ptr_ring: ring test

2016-06-15T20:58:27+00:00

Add ringtest based unit test for ptr ring.

Signed-off-by: Michael S. Tsirkin 
Signed-off-by: David S. Miller

tools/virtio: add noring tool

2016-06-06T10:00:11+00:00

Useful to measure testing framework overhead.

Signed-off-by: Michael S. Tsirkin

tools/virtio/ringtest: fix run-on-all.sh to work without /dev/cpu

2016-06-06T10:00:11+00:00

/dev/cpu is only available on x86 with certain modules (e.g. msr) enabled.
Using lscpu to get processors count is more portable.

Signed-off-by: Mike Rapoport 
Signed-off-by: Michael S. Tsirkin