From owner-freebsd-smp Sun Jun 25 10:13:27 2000 Delivered-To: freebsd-smp@freebsd.org Received: from smtp02.primenet.com (smtp02.primenet.com [206.165.6.132]) by hub.freebsd.org (Postfix) with ESMTP id 25DC837BC5A for ; Sun, 25 Jun 2000 10:13:12 -0700 (PDT) (envelope-from tlambert@usr02.primenet.com) Received: (from daemon@localhost) by smtp02.primenet.com (8.9.3/8.9.3) id KAA12048; Sun, 25 Jun 2000 10:12:22 -0700 (MST) Received: from usr02.primenet.com(206.165.6.202) via SMTP by smtp02.primenet.com, id smtpdAAAmfaOGx; Sun Jun 25 10:12:21 2000 Received: (from tlambert@localhost) by usr02.primenet.com (8.8.5/8.8.5) id KAA09348; Sun, 25 Jun 2000 10:13:07 -0700 (MST) From: Terry Lambert Message-Id: <200006251713.KAA09348@usr02.primenet.com> Subject: Re: SMP meeting summary To: jasone@canonware.com (Jason Evans) Date: Sun, 25 Jun 2000 17:13:07 +0000 (GMT) Cc: smp@FreeBSD.ORG In-Reply-To: <20000624235605.D8965@blitz.canonware.com> from "Jason Evans" at Jun 24, 2000 11:56:05 PM X-Mailer: ELM [version 2.5 PL2] MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-smp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org > - Netgraph poses locking performance problems, since locks have to be > released at multiple potential transfer points, regardless of whether > Netgraph is in use. This problem also exists with System V STREAMS. > During the meeting we didn't come to a clear consensus on how much of > a problem this really is. FWIW, Soft Updates will have similar issues. In Streams, this was addressed by removing two primitives, and creating what are called "priority bands" to deal with the issue (I worked for Novell USG when UnixWare was going to 2.0 and integrating the ES/MP code into the SVR4 base, and saw much of this happen). Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message