Apple Catalina Appears to Introduce Massive Jitter

Thu Oct 29 12:37:20 UTC 2020

Have you ruled out local wireless issues, such as a literal side-by-side test? 

Does the problem still exist when wired? 

----- 
Mike Hammett 
Intelligent Computing Solutions 

Midwest Internet Exchange 

The Brothers WISP 

----- Original Message -----

From: "Mark Tinka" <mark.tinka at seacom.com> 
To: "Matt Hoppes" <mattlists at rivervalleyinternet.net> 
Cc: "NANOG" <nanog at nanog.org> 
Sent: Thursday, October 29, 2020 7:31:59 AM 
Subject: Re: Apple Catalina Appears to Introduce Massive Jitter 

On 10/29/20 14:27, Matt Hoppes wrote: 

> Is it actually jitter or is it potentially the wireless network card 
> going into sleep mode? I have seen that type of behavior on Apple 
> products when the cards go into low power mode although I can’t say I 
> have noticed that on my laptop. 

Not, not sleep mode, because I am actively using the device to move data 
to/from the Internet. 

I was actually struggling to upload some files to Youtube last weekend, 
and had to use another computer to do it as I couldn't figure out what 
was going on. That it is how bad the jitter is. 

It seems to be a much bigger problem for the upload direction than the 
download, but it, inevitably creates a symmetrical performance problem. 

Mark. 

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