Ah yes, an example of what I am seeing:
Marks-MacBook-Pro.local (172.16.0.239) 2020-10-29T14:28:27+0200
Keys: Help Display mode Restart statistics Order of fields quit
Packets Pings
Host Loss% Snt Last Avg Best Wrst StDev
1. 172.16.0.254 0.8% 126 3.9 34.7 2.5 232.1 54.9
Mark.
On 10/29/20 14:07, Mark Tinka wrote:
Hi all.
I've been on High Sierra for several years now due to a limitation
with an app that couldn't deal with Apple's latest rounds of system
permissions since Mojave. Eventually, I gave up on waiting for them to
fix it and upgraded my older Butterfly keyboard laptop to Catalina 4
weeks ago.
At the same time, I picked up the new Magic keyboard laptop 2 weeks
ago which came with Catalina.
Over the past week, I've been troubleshooting a massive jitter issue
on Catalina, just between itself and my home router. For control, I
have a Windows PC (tower-top) using a wireless adapter to connect to
my home network. That has no jitter at all.
I have noticed as much as 300ms+ jitter on Catalina.
I then asked a few friends around the world to run tests for me on
their own Catalina installations to their local router over wi-fi, and
the results are the same. Jitter so high that what should be a 1ms -
5ms latency can (for a short period) jump to 200ms+, 300ms+, 400ms+.
On the off-chance that it is an issue with the new wireless chips on
the later MacBook models, one of my friends tested the same on a 2013
MacBook Pro running a beta version of Big Sur. Same story!
Another friend in South East Asia, testing on a 2018 13-inch MacBook
Pro running Catalina, also had the same issue.
A Google search suggests that this is some known issue since Mojave,
to do with Location Services, and some other apps, in a
non-deterministic way:
https://apple.stackexchange.com/questions/263638/macbook-pro-experiencing-ping-spikes-to-local-router
For me, even after disabling all or some Location Services features,
the problem remains.
Is anyone else seeing this on their Catalina Mac's while on wi-fi? If
so, does anyone know what's going on here?
Ideally, this wouldn't matter if it was just a cosmetic issue - but I
do actually see physical impact to performance of network access
to/from the laptop, which has all the hallmarks of high jitter and/or
packet loss.
An app like Zoom, which can display network performance data for a
session in real-time, does indicate nominal packet loss for audio and
video on this device, while other devices on the same WLAN are happy.
Thoughts?
Mark.