From owner-freebsd-smp Tue May 7 6:16:41 2002 Delivered-To: freebsd-smp@freebsd.org Received: from mail.speakeasy.net (mail16.speakeasy.net [216.254.0.216]) by hub.freebsd.org (Postfix) with ESMTP id 8633237B409 for ; Tue, 7 May 2002 06:15:43 -0700 (PDT) Received: (qmail 20593 invoked from network); 7 May 2002 13:15:40 -0000 Received: from unknown (HELO server.baldwin.cx) ([216.27.160.63]) (envelope-sender ) by mail16.speakeasy.net (qmail-ldap-1.03) with DES-CBC3-SHA encrypted SMTP for ; 7 May 2002 13:15:40 -0000 Received: from laptop.baldwin.cx (gw1.twc.weather.com [216.133.140.1]) by server.baldwin.cx (8.11.6/8.11.6) with ESMTP id g47DFQF28663 for ; Tue, 7 May 2002 09:15:27 -0400 (EDT) (envelope-from jhb@FreeBSD.org) Message-ID: X-Mailer: XFMail 1.5.2 on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 Date: Tue, 07 May 2002 09:15:18 -0400 (EDT) From: John Baldwin To: smp@FreeBSD.org Subject: Possible status report Sender: owner-freebsd-smp@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Here's what I've come up with for a status report so far. If you have more to add please let me know: SMPng Status Report John Baldwin jhb@FreeBSD.org smp@FreeBSD.org

The SMPng project has been picking up steam in the last few months thankfully. In February, Seigo Tanimura-san committed the first round of process group and session locking. Alfred Perlstein also added locking to most of the pipe implementation. In March, Alfred fixed several problems with the locking for select() and pushed down Giant some in several system calls. Andrew Reiter added locking for kernel module metadata, and Jeff Roberson wrote a new SMP-friendly slab allocator to replace both the zone allocator and the in-kernel malloc(). Several other subsystems were also locked in April as well. See the SMPng website and todo list for more details.

Some of the current works in progress include locking for the kernel linker by Andrew Reiter and light-weight interrupt threads for the i386 by Bosko Milekic. Seigo Tanimura-san, Alfred Perlstein, and Jeffrey Hsu are also working on locking down various pieces of the networking stack. John Baldwin has written an implementation of turnstiles as well as adaptive mutexes in the jhb_lock Perforce branch. The adaptive mutexes appear to be stable on i386, alpha, and sparc64, but the turnstile code still contains several tricky lock order reversals. John also plans to commit the p_canfoo() API change to use td_ucred in the very near future and then finish the task of making ktrace(4) use a worker thread.

 -- John Baldwin <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message