Date: Tue, 02 Nov 1999 15:15:10 +0100 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: "Daniel M. Eischen" <eischen@vigrid.com> Cc: Julian Elischer <julian@whistle.com>, freebsd-arch@freebsd.org Subject: Re: Threads models and FreeBSD. (Next Step) Message-ID: <25999.941552110@critter.freebsd.dk> In-Reply-To: Your message of "Tue, 02 Nov 1999 09:09:08 EST." <381EF084.C9292297@vigrid.com>
next in thread | previous in thread | raw e-mail | index | archive | help
In message <381EF084.C9292297@vigrid.com>, "Daniel M. Eischen" writes: >Poul-Henning Kamp wrote: >> >> In message <381EE0D0.874F6198@vigrid.com>, "Daniel M. Eischen" writes: >> >> >> There is not much point in making a lightweight process facility >> >> if the resulting processes are not lightweight. >> > >> >And quantum is _the_ attribute that makes them lightweight or non >> >lightweight? They each share file descriptors, address space, etc. >> >> Lack of overhead is what makes the lightweight. >> >> Keeping track of quanta, accounting permissions or anything else >> on a "per XXX" basis is "overhead" in this context. > >I'll make an assumption that a lightweight process is just going >to be another proc. A proc already contains scheduling attributes >and it seems _extra_ work to make another dereference to get to >the parents proc scheduling attributes. Think "context switch" -- Poul-Henning Kamp FreeBSD coreteam member phk@FreeBSD.ORG "Real hackers run -current on their laptop." FreeBSD -- It will take a long time before progress goes too far! 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?25999.941552110>