Date: Fri, 13 Dec 2002 14:13:25 EST From: higgsr@rpi.edu To: nathan_arun@hotmail.com Cc: arch@freebsd.org Subject: Re: Threads in FreeBSD Message-ID: <200212131913.gBDJDPrl167000@mail.rpi.edu>
next in thread | raw e-mail | index | archive | help
There is a paper describing -CURRENT's ideal model for thread support http://www.asdf.dk/sjov/freebsd_kse.pdf the status page http://www.freebsd.org/kse/ and some miscellaneous diagrams, email list threads, etc. http://people.freebsd.org/~julian/threads/ Ray On Fri, 13 Dec 2002 13:35:28 -0500 (EST) Kenneth Culver wrote: > > I'm currently reading the book "Modern Operating Systems" by Tanenbaum, > > where he says there are 2 kinds of threads. user-level and > kernel-level. > > What type of threads is implemented in FreeBSD? user, kernel or both? > > FreeBSD-STABLE's threads are currently totally in userland. > FreeBSD-CURRENT's threads will eventually be a sort of a hybrid design, > with kernel support for multiple threads so that different parts of the > kernel, and different userland threads can be run on different > processors. > The FreeBSD implementation in -CURRENT is similar to the Scheduler > Activation method. The thread scheduler is in userland with an upcall > into > the kernel that can cause threads to be scheduled across multiple > processors. I'm not sure that's quite working yet, but work is > progressing > in -CURRENT, and from what I hear, should be ready in time for > 5.1-RELEASE > > Ken > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-arch" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200212131913.gBDJDPrl167000>