From owner-freebsd-hackers Mon Apr 24 6:14:30 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from rmx04.globecomm.net (rmx04.iname.net [165.251.8.202]) by hub.freebsd.org (Postfix) with ESMTP id 97A2437BABD for ; Mon, 24 Apr 2000 06:14:25 -0700 (PDT) (envelope-from hamidreza@mail.com) Received: from web431-mc.mail.com by rmx04.globecomm.net (8.9.1/8.8.0) with SMTP id JAA00771 ; Mon, 24 Apr 2000 09:13:05 -0400 (EDT) Message-ID: <380857435.956581985438.JavaMail.root@web431-mc.mail.com> Date: Mon, 24 Apr 2000 09:13:05 -0400 (EDT) From: Hamid Moghadam To: hackers@freebsd.org Subject: TCP maximum data lenght Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: mail.com X-Originating-IP: 195.200.226.110 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Dear folks Recently, I have notice a problem. When I send or receive data blocks <= 4096 with READ or WRITE system calls, everything work well, when I increase the block size, syscalls return the correct value but the network throughput falls down %80. I have increased the socket rcv/snd buffer size and there is no changes. Sys: 3.4R on a PIII with two 3C905B nics working 100M full-duplex Comments will be appretiated. TIA - HM ______________________________________________ FREE Personalized Email at Mail.com Sign up at http://www.mail.com/?sr=signup To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message