Date: Wed, 01 Feb 2023 12:18:49 +0000 From: Pete French <pete@twisted.org.uk> To: 2yt@gmx.com, paul@gromit.dlib.vt.edu Cc: freebsd-stable@freebsd.org Subject: Re: Slow WAN traffic to FreeBSD hosts but not to Linux hosts---how to debug/fix? Message-ID: <E1pNC4f-000JJi-MH@toybox.twisted.org.uk> In-Reply-To: <A3E14937-0CC7-4C4F-ABAE-7DA37CDD7BE7@gromit.dlib.vt.edu>
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> > In my opinion HTCP is a better default for the current state of the internet. > > > It looks like they already changed the default from NewReno to CUBIC in FreeBSD-CURRENT. This worries me, because I did some experimentatiion yesterday, changing these settings and trying things out, Not for sending, but for recieving. i.e. I switch the algorithm on the server, and then send a lot of data to it. I have a MacBook, on home lan+wifi, and a small server running FreeBSD 13. I backup the laptop by rsyncing to the server and I can run that manually, so its a nice test of how fast I can push data to the server. I switched the server to cubic - and my rsync fails. Not always at the same point, but predictably after a number of minutes it always fails with the connection being dropped. Doesnt happen with newreno, and always happens with cubic. Which surprised me. So, I switched cubic back to newreno - but if this is going to be the default in CURRENT then probably we need to gte to the bottom of it somehow. I just am not sure how to start... -pete.
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