nanog mailing list archives
Re: Apple Catalina Appears to Introduce Massive Jitter
From: David Curado <davec () curado org>
Date: Thu, 29 Oct 2020 14:14:25 -0400
I was curious, so poked at this... my results from a macbook pro 2019 running Catalina 10.15.3 sudo /usr/local/sbin/mtr -r 10.200.200.200 Start: 2020-10-29T14:09:08-0400 HOST: bos-mp36c Loss% Snt Last Avg Best Wrst StDev 1.|-- 10.200.200.200 0.0% 10 11.9 63.7 9.0 340.2 104.1 sudo sysctl net.link.generic.system.hwcksum_tx=0 net.link.generic.system.hwcksum_tx: 1 -> 0 sudo sysctl net.link.generic.system.hwcksum_rx=0 net.link.generic.system.hwcksum_rx: 1 -> 0 sudo ifconfig en0 -rxcsum sudo /usr/local/sbin/mtr -r 10.200.200.200 Start: 2020-10-29T14:09:43-0400 HOST: bos-mp36c Loss% Snt Last Avg Best Wrst StDev 1.|-- 10.200.200.200 0.0% 10 19.8 13.6 9.8 20.9 4.5 So, seems to make things better. =-) On Thu, Oct 29, 2020 at 11:50 AM Mark Tinka <mark.tinka () seacom com> wrote:
On 10/29/20 16:08, J. Hellenthal wrote:I believe I have seen the same thing with a Mid 2015 11,4 runningcatalina. Not diagnosing further because I could not find a reason for it fast enough and not sure if it really had an impact at the moment…. but could you try the followingsudo sysctl net.link.generic.system.hwcksum_tx=0 sudo sysctl net.link.generic.system.hwcksum_rx=0 sudo ifconfig en0 -rxcsumThanks, I'll have a sniff.If you have some specific tests to run I would be willing to run themhere on Big Sur with the same laptop but I have nothing now that runs Catalina One of my mates found the same issue on Big Sur (beta) on a 2013 MacBook Pro. Just a simple mtr test to your local home router's IP address should, over wi-fi, should show you the jitter. Mark.
Current thread:
- Re: Apple Catalina Appears to Introduce Massive Jitter, (continued)
- Re: Apple Catalina Appears to Introduce Massive Jitter Mike Hammett (Oct 29)
- Re: Apple Catalina Appears to Introduce Massive Jitter Mark Tinka (Oct 29)
- Re: Apple Catalina Appears to Introduce Massive Jitter Jared Mauch (Oct 29)
- Re: Apple Catalina Appears to Introduce Massive Jitter Mark Tinka (Oct 29)
- Re: Apple Catalina Appears to Introduce Massive Jitter Cory Sell via NANOG (Oct 30)
- Re: Apple Catalina Appears to Introduce Massive Jitter Mark Tinka (Oct 29)
- Re: Apple Catalina Appears to Introduce Massive Jitter J. Hellenthal via NANOG (Oct 29)
- Re: Apple Catalina Appears to Introduce Massive Jitter J. Hellenthal via NANOG (Oct 29)
- Re: Apple Catalina Appears to Introduce Massive Jitter Niels Bakker (Oct 29)
- Re: Apple Catalina Appears to Introduce Massive Jitter Mark Tinka (Oct 29)
- Re: Apple Catalina Appears to Introduce Massive Jitter David Curado (Oct 30)
- Re: Apple Catalina Appears to Introduce Massive Jitter Mark Tinka (Oct 29)
- Re: Apple Catalina Appears to Introduce Massive Jitter - SOLVED! Mark Tinka (Oct 30)
- Re: Apple Catalina Appears to Introduce Massive Jitter - SOLVED! Doug Barton (Oct 30)
- Re: Apple Catalina Appears to Introduce Massive Jitter - SOLVED! J. Hellenthal via NANOG (Oct 30)
- Re: Apple Catalina Appears to Introduce Massive Jitter - SOLVED! Mark Tinka (Oct 31)
- Re: Apple Catalina Appears to Introduce Massive Jitter - SOLVED! Mark Tinka (Oct 31)
- Re: Apple Catalina Appears to Introduce Massive Jitter - SOLVED! Aaron Atac via NANOG (Oct 30)
- Re: Apple Catalina Appears to Introduce Massive Jitter colin johnston (Oct 29)
- Re: Apple Catalina Appears to Introduce Massive Jitter colin johnston (Oct 29)
- Re: Apple Catalina Appears to Introduce Massive Jitter Mark Tinka (Oct 29)