Messages in this thread |  | | Date | Sun, 27 Aug 2000 21:44:08 -0600 | From | yodaiken@fsmlabs ... | Subject | Re: SCO: "thread creation is about a thousand times faster than on |
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Just for the record, I promoted 1003.13 to 10003.13 and that's not only incorrect, but scary.
On Sun, Aug 27, 2000 at 09:27:27PM -0600, yodaiken@fsmlabs.com wrote: > On Sun, Aug 27, 2000 at 08:27:59PM -0700, Linus Torvalds wrote: > > > > > > On Sun, 27 Aug 2000 yodaiken@fsmlabs.com wrote: > > > > > > The beauty of POSIX 1003.13 for the RTLinux side is that we get to > > > define POSIX_SINGLE_PROCESS and forbid forbid fork and exec: making > > > threads semantics much cleaner. > > > > Well, what you think of as a "beauty" I just consider a silly cop-out by > > the standard. Basically, a lot of things can call themselves "compliant to > > the letter of the law" wrt POSIX, while still leaving the _user_ out in > > the cold. > > It's silly to expect to "fork" or to "exec" via a file system in a > minimal realtime environment. These are complex activities however you > cut it. By defining a set of execution environments, the 10003.13 > specification makes the _user_ confront the reality that some services > don't make sense if you are prepared to put up with only a tiny > OS overhead. POSIX 10003.13 requires you to label compliance correctly. > So, we can very clearly tell the user that running in the RT environment > gives you pthreads PSE51 and if you want PSE54 with all the features of > a full service UNIX, run in the Linux environment. > > > -- > --------------------------------------------------------- > Victor Yodaiken > Finite State Machine Labs: The RTLinux Company. > www.fsmlabs.com www.rtlinux.com
-- --------------------------------------------------------- Victor Yodaiken Finite State Machine Labs: The RTLinux Company. www.fsmlabs.com www.rtlinux.com
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