Date: Sat, 28 Oct 2006 10:48:52 +0100 (BST) From: Robert Watson <rwatson@FreeBSD.org> To: Julian Elischer <julian@elischer.org> Cc: Paul Allen <nospam@ugcs.caltech.edu>, Lev Serebryakov <lev@freebsd.org>, current@freebsd.org Subject: Re: KSE, libpthread & libthr: almost newbie question Message-ID: <20061028104741.Q69980@fledge.watson.org> In-Reply-To: <45429703.8070305@elischer.org> References: <917908193.20061027102647@serebryakov.spb.ru> <20061027103924.F79313@fledge.watson.org> <45426071.7020403@elischer.org> <602423478.20061028001449@serebryakov.spb.ru> <4542896D.1050001@elischer.org> <20061027231642.GJ30707@riyal.ugcs.caltech.edu> <45429703.8070305@elischer.org>
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On Fri, 27 Oct 2006, Julian Elischer wrote: > there is class of problems (e.g. some java programs) that have THOUSANDS of > threads, each representing an active aspect of some object. How do you put > an rlimit on that without either 1/ stopping the program from working or 2/ > allowing thousands of threads to exist but not screwing other users. Does the JVM actually expose thousands of threads to the OS, or does it actually do its own M:N threading internally based on its execution model? My impression is the latter, exposing threads to the OS only when it needs them to consume kernel or CPU resources. Robert N M Watson Computer Laboratory University of Cambridge
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