Date: Fri, 1 Dec 2000 09:17:12 +0800 From: "xuyifeng" <bsddiy@163.net> To: "Julian Elischer" <julian@elischer.org>, "Tony Finch" <dot@dotat.at> Cc: <arch@freebsd.org> Subject: Re: Thread-specific data and KSEs Message-ID: <002501c05b34$b1609de0$e001a8c0@xyf> References: <20001122133421.S18037@fw.wintelcom.net> <Pine.SUN.3.91.1001122180448.7920A-100000@pcnet1.pcnet.com> <20001130065503.E58294@hand.dotat.at> <3A2664AC.493B4101@elischer.org>
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but this limits total threads to less than 2000 if the process address space is 2G, threads needn't 1M stack space in most case. XuYifeng ----- Original Message ----- From: Julian Elischer <julian@elischer.org> To: Tony Finch <dot@dotat.at> Cc: <arch@freebsd.org> Sent: Thursday, November 30, 2000 10:31 PM Subject: Re: Thread-specific data and KSEs > Tony Finch wrote: > > > > Daniel Eischen <eischen@vigrid.com> wrote: > > >On Wed, 22 Nov 2000, Alfred Perlstein wrote: > > >> > > >> Was there something wrong with the suggestion to put the local info > > >> on the stack? I just don't see it being discussed at all. > > > > > >Yes, I stated that it could not be used. We want to provide a POSIX > > >complaint API, and this dictates that applications be able to create > > >stacks of their own size and choosing. We can't rely on stacks being > > >any particular size, or starting at any particular address. > > > > Additionally, wouldn't you have to walk up the stack to find its base? > > (which I guess would be a bit more expensive than dereferencing %gs) > > No, you start each stack on some multiple of (say) 1MB > and then you just or it with 0xfffff to find the top of the stack.. > (This is what one of the MACH threads packages used to do) > > > > > Tony. > > -- > > f.a.n.finch dot@dotat.at fanf@covalent.net Chad for President! > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-arch" in the body of the message > > -- > __--_|\ Julian Elischer > / \ julian@elischer.org > ( OZ ) World tour 2000 > ---> X_.---._/ presently in: Budapest > v > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-arch" in the body of the message
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