Date: Tue, 5 Aug 2003 14:16:55 -0700 (PDT) From: Julian Elischer <julian@elischer.org> To: Marcel Moolenaar <marcel@xcllnt.net> Cc: threads@freebsd.org Subject: Re: Good news: KSE on ia64 is starting to work Message-ID: <Pine.BSF.4.21.0308051415440.82100-100000@InterJet.elischer.org> In-Reply-To: <20030805210011.GB879@athlon.pn.xcllnt.net>
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On Tue, 5 Aug 2003, Marcel Moolenaar wrote:
> On Tue, Aug 05, 2003 at 04:43:00PM -0400, Daniel Eischen wrote:
> > > In struct ia64_tp we define tp_tls as an array of char. If we
> > > define it as an array of long double we automaticly have 16-byte
> > > alignment of the static TLS, struct ia64_tp, struct tcb and
> > > struct kcb. Allocating the TCB will then automaticly ensure that
> > > the static TLS is properly aligned. I'm currently testing with
> > > the following (re)definition of struct ia64_tp:
> > >
> > > struct ia64_tp {
> > > struct tdv *tp_tdv; /* dynamic TLS */
> > > struct tcb *tp_self;
> > > long double tp_tls[0]; /* static TLS */
> > > };
> >
> > Sure; that was merely a placeholder so one (you) could replace
> > it with whatever is needed. I assume this (static TLS) will
> > have some predetermined size...
>
> It's a runtime constant yes. We'll know the size of the static TLS
> when we initialize libkse/libpthread and TLS support has been added.
> I expect that kcb_faketcb doesn't need any TLS, because it's not
> used for running user code, just an internal "doohicky", right?
>
> BTW: Feel free to commit your patch at your earliest convenience
> (with or without the change described above). I see a slight
> regression after applying the patch, but much rather see it
> committed than having to work with a large patch...
you mean a 'speed' regression?
don't forget that you can make sure you only do extra work if
p->p_flag & P_SA is true..
>
> --
> Marcel Moolenaar USPA: A-39004 marcel@xcllnt.net
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