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? jiang 2212bdbc80 virtio-net: lower min ring num_free for efficiency 
This change lowers ring buffer reclaim threshold from 1/2*queue to budget
for better performance. According to our test with qemu + dpdk, packet
dropping happens when the guest is not able to provide free buffer in
avail ring timely with default 1/2*queue. The value in the patch has been
tested and does show better performance.

Test setup: iperf3 to generate packets to guest (total 30mins, pps 400k, UDP)
avg packets drop before: 2842
avg packets drop after: 360(-87.3%)

Further, current code suffers from a starvation problem: the amount of
work done by try_fill_recv is not bounded by the budget parameter, thus
(with large queues) once in a while userspace gets blocked for a long
time while queue is being refilled. Trigger refills earlier to make sure
the amount of work to do is limited.

Signed-off-by: jiangkidd <jiangkidd@hotmail.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
 		2020-01-02 14:55:55 +08:00
..
accessibility Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
acpi Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
amba Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
android Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
ata Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
atm Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
auxdisplay Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
base Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
bcma Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
block NBD: remove invalid reread of partition info 2020-01-02 12:12:53 +08:00
bluetooth Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
bus Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
cdrom Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
char Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
clk Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
clocksource Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
connector Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
cpufreq Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
cpuidle Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
crypto Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
dax Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
dca Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
devfreq Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
dio Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
dma Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
dma-buf Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
edac Add AMD Rome RAS feature support 2020-01-02 12:07:19 +08:00
eisa Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
extcon Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
firewire Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
firmware arm64: implement ftrace with regs by using patchable-function-entry 2020-01-02 12:14:57 +08:00
fmc Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
fpga Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
fsi Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
gpio Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
gpu Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
hid Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
hsi Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
hv Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
hwmon Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
hwspinlock Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
hwtracing Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
i2c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
ide Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
idle Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
iio Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
infiniband Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
input Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
iommu iommu/amd: Add support for IOMMU XT mode 2020-01-02 12:19:07 +08:00
ipack Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
irqchip Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
isdn Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
leds Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
lightnvm Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
macintosh Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
mailbox Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
mcb Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
md dm: add support for blkcg diskstats 2020-01-02 12:20:20 +08:00
media Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
memory Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
memstick Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
message Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
mfd Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
misc Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
mmc MMC: Use the device ID implied from device tree 2020-01-02 14:52:13 +08:00
mtd Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
mux Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
net virtio-net: lower min ring num_free for efficiency 2020-01-02 14:55:55 +08:00
nfc Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
ntb Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
nubus Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
nvdimm Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
nvme Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
nvmem Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
of MMC: Use the device ID implied from device tree 2020-01-02 14:52:13 +08:00
oprofile Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
parisc Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
parport Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
pci Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
pcmcia Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
perf Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
phy Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
pinctrl Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
platform Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
pnp Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
power Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
powercap Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
pps Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
ps3 Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
ptp Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
pwm Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
rapidio Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
ras Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
regulator Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
remoteproc Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
reset Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
rpmsg Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
rtc Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
s390 Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
sbus Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
scsi driver: fix mpt3sas driver Makefile bug 2020-01-02 12:07:49 +08:00
sfi Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
sh Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
sn Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
soc Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
spi Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
spmi Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
ssb Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
ssd Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
staging Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
target Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
tc Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
tee Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
thermal Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
thunderbolt Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
tty Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
uio Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
usb Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
uwb Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
vfio Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
vhost Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
video Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
virt Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
virtio Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
vlynq Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
vme Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
w1 Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
watchdog Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
xen Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
zorro Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
Kconfig Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
Makefile Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00