From owner-freebsd-java  Tue Jan 26 17:32:58 1999
Return-Path: <owner-freebsd-java@FreeBSD.ORG>
Received: (from majordom@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id RAA03152
          for freebsd-java-outgoing; Tue, 26 Jan 1999 17:32:58 -0800 (PST)
          (envelope-from owner-freebsd-java@FreeBSD.ORG)
Received: from cafe.muraoka.info.waseda.ac.jp (cafe.muraoka.info.waseda.ac.jp [133.9.68.49])
          by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id RAA03147
          for <java@FreeBSD.ORG>; Tue, 26 Jan 1999 17:32:55 -0800 (PST)
          (envelope-from shudoh@muraoka.info.waseda.ac.jp)
Received: from muraoka.info.waseda.ac.jp (shudoh@localhost [127.0.0.1])
	by cafe.muraoka.info.waseda.ac.jp (8.9.1a/3.7W) with ESMTP id KAA26867;
	Wed, 27 Jan 1999 10:32:32 +0900
Message-Id: <199901270132.KAA26867@cafe.muraoka.info.waseda.ac.jp>
To: Tom <tom@sdf.com>
Cc: java@FreeBSD.ORG
Subject: Re: TowerJ for FreeBSD
In-reply-to: Your message of "Tue, 26 Jan 1999 08:53:35 JST."
             <Pine.BSF.4.05.9901260851280.7314-100000@misery.sdf.com>
Date: Wed, 27 Jan 1999 10:32:32 +0900
From: SHUDO Kazuyuki <shudoh@muraoka.info.waseda.ac.jp>
Sender: owner-freebsd-java@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.org

> > > Yep, this is where FreeBSD (and less so Linux) got the crap kicked out
> > > of it.  Linux is a bit better than ours for a couple of reaasons.
>
> > > 2) Our 'Green Threads' implementation uses locking that is not as
> > >    effecient as the Linux version.  In particular, Linux kernel's have
> > >    poll built in, and we emulate it (badly, but effectively) with some
> > >    hacks to use select.

As above, Nate said that Linux kernels have poll built
in so why Linux 'Green Threads' implementation is a bit
better than FreeBSD one. This is incorrect. because,

> > JDK 1.1.7 for Linux/glibc use poll() and not
> > select(). But glibc 2.0.7 which is used on most linux
> > box replaces calls to poll with calls to select since
> > Linux kernel prior to 2.1.23 doesn't have poll().

JDK on most Linux boxes don't make use of poll(). A
system call poll() isn't used by JDK with glibc 2.0.X
even if the Linux kernel has it. Poll() is being
emulated also on Linux boxes.


> > If we'd like to use poll() of Linux kernel, we have to
> > use glibc 2.1 version is currently developed.
>
>   Why?  What does glibc have to do with anything?  FreeBSD doesn't use
> glibc.  FreeBSD 3.0 already has poll()

Sorry for my misleading sentence.
Of course, we have not to use glibc on FreeBSD.
I should have to say, if we'd like to use poll *on*
Linux, we have to...


Kazuyuki SHUDO				Happy Hacking!
  Muraoka Lab., School of Sci. Eng., Waseda Univ.

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-java" in the body of the message