Date: Thu, 18 Nov 1999 10:31:38 -0700 From: Nate Williams <nate@mt.sri.com> To: Jan Buchmann <buchmann@stud.uni-frankfurt.de> Cc: freebsd-java@FreeBSD.ORG Subject: Re: freebsd thread-question Message-ID: <199911181731.KAA15817@mt.sri.com> In-Reply-To: <19991118182157.A1059@hendrix.inet.de> References: <19991118182157.A1059@hendrix.inet.de>
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> first: the good news: the RFE reached 1000 votes :-). Thanks to everyone who voted on the RFE, and especially to Joe who actually submitted the request. I'm not sure what effect (if any) it will have on Sun, but at least at this point they see that there is a vibrant FreeBSD user community, which may make other queries easier.. > second: some some questions about porting java to freebsd (I don't > really know to much about differences between different OSs, but I'll > just ask my questions from what I've heard.): > > 1. Shouldn't it be easier for SUN or another party to port the > original Solaris JDK to FreeBSD systems) cause both OSs derive from > the original BSD and FreeBSD is not a completly new implementation of > *nix, like Linux is? Nope. Actually, it's easier to take the Linux changes and apply them, since we both use XFree86. Solaris is based on SVR4, not BSD code, so actually the Linux code-base actually is a better start. Solaris is really it's own beast. > 2. Does FreeBSD have a kernel-thread implementation, so that a port > can use native-threads? How, but for most things, native-threads aren't a big win, and can often be a big lose because context switching in the kernel is *much* more costly, so most multi-threaded programs run much faster using userland code. > 3. Is it possible to use Linux JDK1.2 under FreeBSD with native-threads? Maybe, I don't know. > 4. Does anyone know if IBM wants to do a JDK-Port to FreeBSD (their > Linux-JDK is pure native threads)? We don't have native threads, so it would be hard. > 5. What are the main differences between Solaris, AIX and FreeBSD > under the view of porting or implementing JDK1.2? I have no idea about AIX, but the difficulty is usually related to XFree86 (fonts and such), using select instead of poll, and the lack of threaded libraries on FreeBSD. This is a somewhat trivial lilst, as there are lots more things to do, but those are some big ones. Nate To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-java" in the body of the message
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