Date: Mon, 03 Jul 2000 13:15:16 -0700 From: Jake Burkholder <jburkhol@home.com> To: Jason Evans <jasone@canonware.com> Cc: Greg Lehey <grog@lemis.com>, Matthew Dillon <dillon@apollo.backplane.com>, freebsd-smp@freebsd.org Subject: Re: SMP progress (was: Stepping on Toes) Message-ID: <20000703201516.28BA3BA4E@io.yi.org> In-Reply-To: Message from Jason Evans <jasone@canonware.com> of "Mon, 03 Jul 2000 08:41:31 PDT." <20000703084130.D826@blitz.canonware.com>
index | next in thread | previous in thread | raw e-mail
> On Mon, Jul 03, 2000 at 11:22:03AM +0930, Greg Lehey wrote: > > Agreed. I'm in the process of implementing the heavy-weight interrupt > > processes now. I've just taken a look at your web page and note that > > the URL no longer exists; in conjunction with the discussion above, > > I'm no longer sure how far you are. Are you importing the BSD/OS code > > now? > > > > We should probably take the rest of this offline, but I wanted to > > discuss how we do things. My idea is: > > > > 1. You import the BSD/OS mutexes. > > Jake Burkholder offered to port the mutex code, and I discussed this with > Matt last week, who had no problems with Jake doing it. As of last night, > it sounds like Jake essentially has this done for i386, and Doug Rabson > will be following soon with the alpha bits. Jake's patch set also includes > the pertinent parts of Matt's work (per-CPU idle processes, some of the > schedlock changes, etc.). I'll be adding a link to Jake's most recent > patch set on the web page (http://people.freebsd.org/~jasone/smp/) shortly. > Meanwhile, you can get Jake's patch set at: > > http://people.freebsd.org/~jake/smpng2.tar I've just updated this to this mornings -current and added my kernel config. The biggest change is that cpu_switch() no longer disable or enable interrupts directly. Its taken care of by sched_lock since BSD/OS spin mutexes enable and disable interrupts on the first and last release. Protecting the run queues is not really necessary right now, but its a step in the right direction. I haven't dealt with the mp_lock, but I've had this patch running on my UP box for a while, building kernels etc. I think we'll want to make INVARIANTS, INVARIANT_SUPPORT, DIAGNOSTIC, and SMP_DEBUG on by default in -current for a while at least. Every assertion helps. WITNESS currently isn't doing anything because the sched_lock is ignored, but we'll likely want that by default too. Jake > > > 2. I import/implement the heavy-weight interrupt code, which I will > > endeavour to get working relatively reliably. This should be a > > fallback while I break^H^H^H^H^Himplement light-wait interrupt > > threads. > > Yep, the stage is set for this work to begin now. > > > 3. You and I test our stuff together until it can stay up for an hour > > or so (exact time to be determined by Jason, who'll be carrying > > the can). > > 4. We commit the marginally stable stuff. > > A successful buildworld would be a satisfactory test of stability in my > eyes. Hopefully we can do that well. =) > > Jason To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the messagehome | help
Want to link to this message? Use this
URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20000703201516.28BA3BA4E>