1 (edited by kokowang 22-10-2016 04:50:48)

Topic: Major bug - STILL not fixed (SVP 4 Mac)

I've sent multiple bug reports on this already through SVP manager over the period of a few months. It still has not been fixed so I'm bringing it to attention here.

SVP Manager causes network card to stall periodically when open (even when not playing video), as you can see from the attached image. This problem exists on OS X 10.11 - MacOS 10.12 on ALL macs with wireless functionality.
I use SVP to filter streamed youtube videos (Using youtube-dl). This bug causes issues with streams. During the stalls, the max network bandwidth I was able to get was about 3mb/s (far too slow for 4k/8k streams or even 1080p - note: nominal speeds are about 1200mb/s on my network). Please fix.

Additional information:
SVP does not seem to be using the network at all.
Enabling/disabling SVP-Tube has no effect.
Wireless diagnostics show no obvious problems

Post's attachments

Screen Shot 2016-10-22 at 12.32.50 AM.png, 177.41 kb, 888 x 616
Screen Shot 2016-10-22 at 12.32.50 AM.png 177.41 kb, 409 downloads since 2016-10-22 

Re: Major bug - STILL not fixed (SVP 4 Mac)

kokowang
Can you be more specific?
I can view 4K youtube videos with mpv player at normal speed without stops and stuttering.
For example I took this video: https://www.youtube.com/watch?v=iNJdPyoqt8U
And selected the highest bitrate 4K variant. It plays good for me.

I use OS X 10.11.6, wi-fi connection only.

What I need to do to repeat the problem? I don't understand.

BTW. What is shown on your picture? hmm

Post's attachments

Снимок экрана 2016-10-22 в 15.16.59.png, 61.17 kb, 844 x 192
Снимок экрана 2016-10-22 в 15.16.59.png 61.17 kb, 429 downloads since 2016-10-22 

Re: Major bug - STILL not fixed (SVP 4 Mac)

> What is shown on your picture?

ping 192.168.0.1

Round trip time to the gateway suddenly increased up to 120 ms for some reason

However I can't see how an user-space application like SVP could possibly do this.
Only if it consumes a lot of bandwidth, which it doesn't.

Will try to check if it happens on Mini with Sierra installed...

4 (edited by kokowang 22-10-2016 14:10:33)

Re: Major bug - STILL not fixed (SVP 4 Mac)

MAG79
Having SVP manager running will cause ping to rise to ~100ms periodically. The image is a ping series to my router, sent once per second. Nominal operation is usually 1-4 ms. Whenever SVP manager is open, it shoots up to 20-200ms.

Yes the video streams will still load, but only after the stall is over. (Alternates between stall and normal every 5-10 seconds). Basically it makes it take longer to start the stream in the case that you try to start it during the lag spike.

Here is my exact setup if you're having trouble reproducing the problem:
MBPr late 2015 Base model - MacOS 10.12 Sierra
Problem exists internally on the mac so router type shouldn't matter.
SVP (4.0.0.91/mac) - Config shouldn't matter since problem is present with only manager open, without video being rendered.
SVP-Tube either enabled or disabled
Logs show that SVP isn't doing anything during latency spikes.

Additional (mostly useless) information:
Self ping - stable 0.02-0.09ms

Router - Archer c3200: TxRate 1300mb/s
Other router - Netgear r6100: TxRate 867mb/s
Other other router - TC (forgot model): TxRate 1000mb/s
Other other other router - iPhone 7 hotspot
Other other other other router - Galaxy s7 hotspot
(point is router shouldn't matter)

No increase in CPU/GPU usage during spikes
No increase in network usage during spikes

  Software Versions:
  CoreWLAN:    11.0 (1200.25.1)
  CoreWLANKit:    12.0 (1200.25.1)
  Menu Extra:    12.0 (1200.33)
  System Information:    12.0 (1200.3)
  IO80211 Family:    12.0 (1200.12.2)
  Diagnostics:    7.0 (700.5)
  AirPort Utility:    6.3.7 (637.5)
  Interfaces:
en0:
  Card Type:    AirPort Extreme  (0x14E4, 0x133)
  Firmware Version:    Broadcom BCM43xx 1.0 (7.21.171.10.1a16)
  MAC Address:    f4:5c:89:ba:ff:61
  Locale:    FCC
  Country Code:    US
  Supported PHY Modes:    802.11 a/b/g/n/ac
  Supported Channels:    1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 149, 153, 157, 161, 165
  Wake On Wireless:    Supported
  AirDrop:    Supported
  AirDrop Channel:    149
  Auto Unlock:    Supported
  Status:    Connected
  Current Network Information:
1300Mb5G_Low:
  PHY Mode:    802.11ac
  BSSID:    ec:08:6b:72:54:f7
  Channel:    40
  Country Code:    US
  Network Type:    Infrastructure
  Security:    WPA2 Personal
  Signal / Noise:    -61 dBm / -90 dBm
  Transmit Rate:    1170
  MCS Index:    9

Re: Major bug - STILL not fixed (SVP 4 Mac)

ok, I can see it
every ~10 seconds

not an issue with wired connection though

Re: Major bug - STILL not fixed (SVP 4 Mac)

Oh. I see. I confirm the issue too.
OS X 10.11.6 gives me the same results. Response time up to 100 ms every 10 seconds.

Re: Major bug - STILL not fixed (SVP 4 Mac)

So is this something that can be fixed soon or would it be a while before the bug is patched?

Re: Major bug - STILL not fixed (SVP 4 Mac)

right now you can choose between
- SVP's bug
- Qt's bug
- macOS's bug

lets just wait until we'll track it down to some simple code

Re: Major bug - STILL not fixed (SVP 4 Mac)

ok, it's a Qt's one
it tries to re-scan network configuration every 10 seconds which lead to the wi-fi glitch on MacOS

solution:

rm -f "/Applications/SVP 4 Mac.app/Contents/PlugIns/bearer/libqcorewlanbearer.dylib"

Re: Major bug - STILL not fixed (SVP 4 Mac)

fixed in rev.96