From owner-freebsd-hackers Sat Dec 29 9:49: 5 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from niwun.pair.com (niwun.pair.com [209.68.2.70]) by hub.freebsd.org (Postfix) with SMTP id 367A937B41E for ; Sat, 29 Dec 2001 09:49:03 -0800 (PST) Received: (qmail 1578 invoked by uid 3193); 29 Dec 2001 17:49:02 -0000 Received: from localhost (sendmail-bs@127.0.0.1) by localhost with SMTP; 29 Dec 2001 17:49:02 -0000 Date: Sat, 29 Dec 2001 12:49:02 -0500 (EST) From: Mike Silbersack X-Sender: To: Josef Karthauser Cc: Tomas Svensson , Subject: Re: FreeBSD performing worse than Linux? In-Reply-To: <20011229174133.A98245@tao.org.uk> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Sat, 29 Dec 2001, Josef Karthauser wrote: > On Fri, Dec 28, 2001 at 07:27:36PM +0100, Tomas Svensson wrote: > > This just verifies what I said weeks ago. > > > > On the client side: > > > > ## several packets are lost here due to congestion, thanks to > > TCP_NODELAY: > > No. These packets aren't lost to congestion. I can reproduce this > pattern every time. There's no random packet loseness about it. > > You are right that switching TCP_NODELAY off does fix it, but it's not > caused by congestion I can assure you. > > Joe Whether the packet loss is random or not, there is packet loss occuring. What's the exact network setup between the two machines? Perhaps it's a collision occuring each time. I guess you could try running netstat -i on each computer before and after to see if you can see the problem occur at that layer. Mike "Silby" Silbersack To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message