Date: Thu, 5 Dec 2002 21:10:18 -0500 (EST) From: Robert Watson <rwatson@FreeBSD.org> To: smp@FreeBSD.org Subject: Tweaks to smp(4) Message-ID: <Pine.NEB.3.96L.1021205210843.5166I-100000@fledge.watson.org>
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With the release of FreeBSD 5.0, support for SMP has changed substantially. Not least is the move to a new set of synchronization primitives, and the addition of SMP support on several new hardware platforms. I'd like comments on the attached patch to smp.4, and suggestions about other material to add or cross-reference. I realized I neglected to xref witness, but there's probably a lot more to this. I'd like to commit the changes prior to 5.0-RC2. Robert N M Watson FreeBSD Core Team, TrustedBSD Projects robert@fledge.watson.org Network Associates Laboratories Index: smp.4 =================================================================== RCS file: /home/ncvs/src/share/man/man4/smp.4,v retrieving revision 1.12 diff -u -r1.12 smp.4 --- smp.4 14 Jul 2001 19:40:47 -0000 1.12 +++ smp.4 6 Dec 2002 02:02:39 -0000 @@ -23,7 +23,7 @@ .\" .\" $FreeBSD: src/share/man/man4/smp.4,v 1.12 2001/07/14 19:40:47 schweikh Exp $ .\" -.Dd August 4, 1997 +.Dd December 5, 2002 .Dt SMP 4 .Os .Sh NAME @@ -36,15 +36,25 @@ .Nm kernel implements symmetric multiprocessor support. .Sh COMPATIBILITY -The +Support for multi-processor systems is present for all supported +architectures on FreeBSD. +Currently, this includes alpha, i386, ia64, and sparc64. +.Pp +For i386 systems, the .Nm kernel supports motherboards that follow the Intel MP specification, version 1.4. -.Sh BUGS -That would be a good guess... +On i386 systems, the +.Xr mptable 1 +command may be used to view the status of multi-processor support. .Sh SEE ALSO .Xr mptable 1 , -.Xr dmesg 8 +.Xr condvar 9 , +.Xr msleep 9 , +.Xr mtx_pool 9 , +.Xr mutex 9 , +.Xr sema 9 , +.Xr sx 9 .Sh HISTORY The .Nm @@ -52,5 +62,13 @@ in a separate CVS branch until April 26, 1997, at which point it was merged into 3.0-current. By this date 3.0-current had already been merged with Lite2 kernel code. +.Pp +.Fx 5.0 +introduced support for a host of new synchronization primitives, and +a move towards fine-grained kernel locking rather than reliance on +a Giant kernel lock. +The SMPng Project relied heavily on the support of BSDi, who provided +reference source code from the fine-grained SMP implementation found +in BSD/OS. .Sh AUTHORS .An Steve Passe Aq fsmp@FreeBSD.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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