From owner-freebsd-hackers Fri Oct 20 11:59:29 1995 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.6.12/8.6.6) id LAA15924 for hackers-outgoing; Fri, 20 Oct 1995 11:59:29 -0700 Received: from alpha.xerox.com (alpha.Xerox.COM [13.1.64.93]) by freefall.freebsd.org (8.6.12/8.6.6) with SMTP id LAA15919 for ; Fri, 20 Oct 1995 11:59:27 -0700 Received: from gemini.sdsp.mc.xerox.com ([13.231.132.20]) by alpha.xerox.com with SMTP id <15464(3)>; Fri, 20 Oct 1995 11:55:08 PDT Received: from gnu.mc.xerox.com (gnu.sdsp.mc.xerox.com) by gemini.sdsp.mc.xerox.com (4.1/SMI-4.1) id AA06398; Fri, 20 Oct 95 14:55:07 EDT Received: by gnu.mc.xerox.com (4.1/SMI-4.1) id AA17636; Fri, 20 Oct 95 14:55:06 EDT Message-Id: <9510201855.AA17636@gnu.mc.xerox.com> X-Mailer: exmh version 1.6.4 10/10/95 To: John Birrell Cc: mira!sdsp.mc.xerox.com!leisner@werple.net.au (Marty Leisner), hackers@freebsd.org, jb@cimlogic.com.au Subject: Re: NetBSD/FreeBSD (pthreads) In-Reply-To: Your message of "Thu, 19 Oct 1995 15:25:25 PDT." <199510192222.IAA02052@werple.net.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Fri, 20 Oct 1995 11:55:04 PDT From: "Marty Leisner" Sender: owner-hackers@freebsd.org Precedence: bulk Why would I want kernel level threads? 1) does a debugger understand userlevel threads? 2) if I run a threaded application under strace, with kernel levels threads is may make some sense...with user level threads there's all this junk in the way... 3) Anyone have good hard numbers about the differences between user/kernel level threads on performance? Like I said, the mit package is awfully clever... -- marty leisner@sdsp.mc.xerox.com Member of the League for Programming Freedom