linux/tools
Paolo Bonzini 948a8ac296 ringtest: poll for new buffers once before updating event index
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 <pbonzini@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-10-31 00:21:43 +02:00
..
accounting tools: move accounting tool from Documentation 2016-09-23 13:07:15 -06:00
arch x86/cpufeature: Add AVX512_4VNNIW and AVX512_4FMAPS features 2016-10-19 17:37:13 +02:00
build tools build: Add feature detection for g++ 2016-10-05 19:59:35 -03:00
cgroup
firewire
gpio tools/gpio: fix gpio-event-mon header comment 2016-08-08 09:50:22 +02:00
hv Drivers: hv: utils: Check VSS daemon is listening before a hot backup 2016-09-02 17:22:51 +02:00
iio Second set of iio new device support, features and cleanups for the 4.9 cycle. 2016-09-14 20:42:03 +02:00
include tools: Synchronize tools/include/uapi/linux/bpf.h 2016-10-05 19:31:48 -03:00
kvm/kvm_stat
laptop tools: move laptops dslm tool from Documentation 2016-09-23 13:07:21 -06:00
lguest tools/lguest: Don't bork the terminal in case of wrong args 2016-09-08 08:05:24 +02:00
lib tools lib traceevent: Fix kbuffer_read_at_offset() 2016-10-05 11:36:22 -03:00
net
nfsd
objtool objtool: Fix rare switch jump table pattern detection 2016-10-27 08:20:27 +02:00
pcmcia tools: move pcmcia crc32hash tool from Documentation 2016-09-23 13:07:27 -06:00
perf perf jit: Fix build issue on Ubuntu 2016-10-17 11:25:34 -03:00
power ACPICA: Cleanup for all string-to-integer conversions 2016-09-10 02:37:59 +02:00
scripts tools build: Fix objtool build with ARCH=x86_64 2016-07-22 16:37:44 -03:00
spi Merge remote-tracking branches 'spi/topic/ti-qspi', 'spi/topic/tools', 'spi/topic/txx9' and 'spi/topic/xlp' into spi-next 2016-09-30 09:14:22 -07:00
testing linux-kselftest-4.9-rc1-update 2016-10-14 15:17:12 -07:00
thermal/tmon
time
usb
virtio ringtest: poll for new buffers once before updating event index 2016-10-31 00:21:43 +02:00
vm tools/vm/page_owner: increase temporary buffer size 2016-07-26 16:19:19 -07:00
Makefile