Frame times (90fps) are inconsistent causing linear movements to feel jittery/non-linear.
- Quest 2 (v28)
- Virtual Desktop: V1.20.5 (client and streamer)
- Make sure desktop is running at at least 90fps
- Visit this ufotest
Note: Can also be reproduced in VR mode using the steam browser
- Speed of UFO is linear
- Speed of UFO is non-linear (inconsitent/jittery)
- Used OVR monitoring tool to check frame rate - no correlating frame dips.
Here is a screencast of the issue.
Notes:
- Recorded at 1080p90
- Slowed down video (0.5x) to make it easier to see for those on 60hz displays
- Download video and view locally to see full frame rate
Pretty confident this isn't a network issue but here's a bunch of info for transparency.
Reproduction:
- Tested this out on two different routers with identical results (see below).
- For all cases where CH100 was used, there were no other hotspots within range running at this frequency.
- When testing, there were no other connected clients to the router (other than the host PC via ethernet).
Channels tried (identical issue across the board):
- 40mhz (AC, CH36, CH100, LAN QOS on/off)
- 80mhz (AC, CH36, CH100, LAN QOS on/off)
- 160mhz (AC, CH36, CH100, LAN QOS on/off
- 40mhz (AX, CH36, CH100, LAN QOS on/off)
- 80mhz (AX, CH36, CH100, LAN QOS on/off)
- 160mhz (AX, CH36, CH100, LAN QOS on/off)
TCP
##################################
# TCP - Headset -> Host
##################################
hollywood:/ $ /data/local/tmp/iperf3.9 -c 192.168.1.2
Connecting to host 192.168.1.2, port 5201
[ 5] local 192.168.1.4 port 42978 connected to 192.168.1.2 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 41.2 MBytes 345 Mbits/sec 0 218 KBytes
[ 5] 1.00-2.00 sec 42.3 MBytes 355 Mbits/sec 0 218 KBytes
[ 5] 2.00-3.00 sec 44.5 MBytes 374 Mbits/sec 0 218 KBytes
[ 5] 3.00-4.00 sec 38.5 MBytes 323 Mbits/sec 0 218 KBytes
[ 5] 4.00-5.00 sec 42.6 MBytes 358 Mbits/sec 0 218 KBytes
[ 5] 5.00-6.00 sec 41.0 MBytes 344 Mbits/sec 0 218 KBytes
[ 5] 6.00-7.00 sec 40.7 MBytes 342 Mbits/sec 0 218 KBytes
[ 5] 7.00-8.00 sec 43.1 MBytes 361 Mbits/sec 0 218 KBytes
[ 5] 8.00-9.00 sec 44.8 MBytes 376 Mbits/sec 0 218 KBytes
[ 5] 9.00-10.00 sec 42.6 MBytes 357 Mbits/sec 0 218 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 421 MBytes 353 Mbits/sec 0 sender
[ 5] 0.00-10.00 sec 421 MBytes 353 Mbits/sec receiver
iperf Done.
##################################
# TCP - Host -> Headset
##################################
hollywood:/ $ /data/local/tmp/iperf3.9 -c 192.168.1.2 -R
Connecting to host 192.168.1.2, port 5201
Reverse mode, remote host 192.168.1.2 is sending
[ 5] local 192.168.1.4 port 43076 connected to 192.168.1.2 port 5201
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 53.2 MBytes 446 Mbits/sec
[ 5] 1.00-2.00 sec 56.2 MBytes 471 Mbits/sec
[ 5] 2.00-3.00 sec 53.4 MBytes 448 Mbits/sec
[ 5] 3.00-4.00 sec 55.8 MBytes 468 Mbits/sec
[ 5] 4.00-5.00 sec 55.4 MBytes 465 Mbits/sec
[ 5] 5.00-6.00 sec 53.7 MBytes 450 Mbits/sec
[ 5] 6.00-7.00 sec 54.3 MBytes 456 Mbits/sec
[ 5] 7.00-8.00 sec 56.2 MBytes 471 Mbits/sec
[ 5] 8.00-9.00 sec 53.8 MBytes 452 Mbits/sec
[ 5] 9.00-10.00 sec 51.2 MBytes 430 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
[ 5] 0.00-10.00 sec 543 MBytes 456 Mbits/sec sender
[ 5] 0.00-10.00 sec 543 MBytes 456 Mbits/sec receiver
iperf Done.
UDP
##################################
# UDP - Headset -> Host
##################################
hollywood:/ $ /data/local/tmp/iperf3.9 -c 192.168.1.2 -u
Connecting to host 192.168.1.2, port 5201
[ 5] local 192.168.1.4 port 54603 connected to 192.168.1.2 port 5201
[ ID] Interval Transfer Bitrate Total Datagrams
[ 5] 0.00-1.00 sec 128 KBytes 1.05 Mbits/sec 90
[ 5] 1.00-2.00 sec 128 KBytes 1.05 Mbits/sec 90
[ 5] 2.00-3.00 sec 128 KBytes 1.05 Mbits/sec 90
[ 5] 3.00-4.00 sec 128 KBytes 1.05 Mbits/sec 90
[ 5] 4.00-5.00 sec 127 KBytes 1.04 Mbits/sec 89
[ 5] 5.00-6.00 sec 128 KBytes 1.05 Mbits/sec 90
[ 5] 6.00-7.00 sec 128 KBytes 1.05 Mbits/sec 90
[ 5] 7.00-8.00 sec 128 KBytes 1.05 Mbits/sec 90
[ 5] 8.00-9.00 sec 127 KBytes 1.04 Mbits/sec 89
[ 5] 9.00-10.00 sec 128 KBytes 1.05 Mbits/sec 90
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
[ 5] 0.00-10.00 sec 1.25 MBytes 1.05 Mbits/sec 0.000 ms 0/898 (0%) sender
[ 5] 0.00-10.00 sec 1.25 MBytes 1.05 Mbits/sec 0.265 ms 0/898 (0%) receiver
iperf Done.
##################################
# UDP - Host -> Headset
##################################
hollywood:/ $ /data/local/tmp/iperf3.9 -c 192.168.1.2 -u -R
Connecting to host 192.168.1.2, port 5201
Reverse mode, remote host 192.168.1.2 is sending
[ 5] local 192.168.1.4 port 57065 connected to 192.168.1.2 port 5201
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
[ 5] 0.00-1.00 sec 130 KBytes 1.06 Mbits/sec 0.226 ms 0/91 (0%)
[ 5] 1.00-2.00 sec 128 KBytes 1.05 Mbits/sec 0.203 ms 0/90 (0%)
[ 5] 2.00-3.00 sec 127 KBytes 1.04 Mbits/sec 0.322 ms 0/89 (0%)
[ 5] 3.00-4.00 sec 128 KBytes 1.05 Mbits/sec 0.105 ms 0/90 (0%)
[ 5] 4.00-5.00 sec 128 KBytes 1.05 Mbits/sec 0.766 ms 0/90 (0%)
[ 5] 5.00-6.00 sec 128 KBytes 1.05 Mbits/sec 0.042 ms 0/90 (0%)
[ 5] 6.00-7.00 sec 127 KBytes 1.04 Mbits/sec 0.066 ms 0/89 (0%)
[ 5] 7.00-8.00 sec 130 KBytes 1.06 Mbits/sec 0.071 ms 0/91 (0%)
[ 5] 8.00-9.00 sec 127 KBytes 1.04 Mbits/sec 0.075 ms 0/89 (0%)
[ 5] 9.00-10.00 sec 128 KBytes 1.05 Mbits/sec 0.037 ms 0/90 (0%)
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
[ 5] 0.00-10.00 sec 1.25 MBytes 1.05 Mbits/sec 0.000 ms 0/899 (0%) sender
[ 5] 0.00-10.00 sec 1.25 MBytes 1.05 Mbits/sec 0.037 ms 0/899 (0%) receiver
iperf Done.
Channels tried (identical issue across the board):
- 40mhz (AX, CH36, CH100)
- 80mhz (AX, CH36, CH100)
- 160mhz (AX, CH36, CH100)