From owner-freebsd-hackers Sun Jun 24 10:48:19 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from imo-m03.mx.aol.com (imo-m03.mx.aol.com [64.12.136.6]) by hub.freebsd.org (Postfix) with ESMTP id 4124D37B401 for ; Sun, 24 Jun 2001 10:48:17 -0700 (PDT) (envelope-from Bsdguru@aol.com) Received: from Bsdguru@aol.com by imo-m03.mx.aol.com (mail_out_v30.22.) id n.a2.15e39041 (3966) for ; Sun, 24 Jun 2001 13:48:05 -0400 (EDT) From: Bsdguru@aol.com Message-ID: Date: Sun, 24 Jun 2001 13:48:05 EDT Subject: Re: Status of encryption hardware support in FreeBSD To: hackers@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: AOL 5.0 for Windows sub 138 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 In a message dated 6/24/01 12:33:25 PM Eastern Daylight Time, karsten@rohrbach.de writes: > > A 3.x driver *could* be ported forward to 4.x and 5.x, but the > > required changes are not trivial (newbus, SMPng...) and you'd still > > need sample boards for testing and debugging, and docs for reference > > when you don't understand what the existing driver is trying to do. > I'd suggest doing a study on the benefits as well. With 1+Ghz processors, the advantages of doing this in hardware become less than in the old days. We did a study on compression hardware, and at 400Mhz is was faster to do it in software than with external hardware. The setup, write to hardware, read from hardware cycles were more than the software processing requirements. Bryan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message