From nobody Wed Feb 01 12:18:49 2023 X-Original-To: freebsd-stable@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4P6LYs74DHz3c4Z4 for ; Wed, 1 Feb 2023 12:18:57 +0000 (UTC) (envelope-from pete@twisted.org.uk) Received: from toybox.twisted.org.uk (toybox.twisted.org.uk [178.250.76.50]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4P6LYs4mwDz449s for ; Wed, 1 Feb 2023 12:18:57 +0000 (UTC) (envelope-from pete@twisted.org.uk) Authentication-Results: mx1.freebsd.org; none DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=twisted.org.uk; s=x; h=Date:From:Message-Id:In-Reply-To:Cc:Subject:To: Sender:Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:References:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=MTRwxkajeE70GZdwAcjSH1cOlBxS+tum5sTU6sKk6zw=; b=aHYr3Mo4+FgvPYwOat2udiGvJ6 FY2aSCYUDi7dwrQWjWGq/iWhagbFCnkMlvRTzfh79sbP2S1dtwiM3w19IblTYGvBY1ftjc2Pr2MX6 pE79r+OJUK2XOY5FsDHTHlG6zHGJLiRy1jTblC1ep8J/lrVB61iOorcBFIUpGJwqmwnU=; Received: from mailnull by toybox.twisted.org.uk with spamc-scanned (Exim 4.95 (FreeBSD)) (envelope-from ) id 1pNC4g-000JJu-LT for freebsd-stable@freebsd.org; Wed, 01 Feb 2023 12:18:50 +0000 X-Spam-Checker-Version: SpamAssassin 3.4.5 (2021-03-20) on toybox.twisted.org.uk X-Spam-Level: X-Spam-Status: No, score=-0.0 required=5.0 tests=NO_RELAYS autolearn=unavailable autolearn_force=no version=3.4.5 X-Spam-Score: -0.0 () Received: from pete by toybox.twisted.org.uk with local (Exim 4.95 (FreeBSD)) (envelope-from ) id 1pNC4f-000JJi-MH; Wed, 01 Feb 2023 12:18:49 +0000 To: 2yt@gmx.com, paul@gromit.dlib.vt.edu Subject: Re: Slow WAN traffic to FreeBSD hosts but not to Linux hosts---how to debug/fix? Cc: freebsd-stable@freebsd.org In-Reply-To: Message-Id: From: Pete French Date: Wed, 01 Feb 2023 12:18:49 +0000 X-spamc-toybox: true X-transport-toybox: lookuphost X-Rspamd-Queue-Id: 4P6LYs4mwDz449s X-Spamd-Bar: ---- X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; ASN(0.00)[asn:12290, ipnet:178.250.72.0/21, country:GB] X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-ThisMailContainsUnwantedMimeParts: N List-Id: Production branch of FreeBSD source code List-Archive: https://lists.freebsd.org/archives/freebsd-stable List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-stable@freebsd.org X-BeenThere: freebsd-stable@freebsd.org > > 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.