Date: Thu, 21 Mar 2002 16:04:16 -0800 From: Bill Huey <billh@gnuppy.monkey.org> To: Nate Williams <nate@yogotech.com> Cc: Greg Lewis <glewis@eyesbeyond.com>, java@FreeBSD.ORG Subject: Re: Mozilla core... & HotSpot update Message-ID: <20020322000416.GA1670@gnuppy.monkey.org> In-Reply-To: <15514.28841.407418.877991@caddis.yogotech.com> References: <20020320201858.GA3125@gnuppy.monkey.org> <15512.61557.26582.852492@caddis.yogotech.com> <20020320233301.GA4011@gnuppy.monkey.org> <15513.7648.287464.414451@caddis.yogotech.com> <20020321000145.GA4319@gnuppy.monkey.org> <20020321142512.A65790@misty.eyesbeyond.com> <20020321063724.GA6657@gnuppy.monkey.org> <15514.3199.968025.626479@caddis.yogotech.com> <20020321234309.GA1607@gnuppy.monkey.org> <15514.28841.407418.877991@caddis.yogotech.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Thu, Mar 21, 2002 at 04:45:45PM -0700, Nate Williams wrote: > They allow multiple JIT compile threads? That seems like a problem > waiting for a solution. Are you *sure*? On an enterprise machine with 10,000+ threads and 64 CPUs, it doesn't make sense to serialize the JIT process into one thread. It almost certainly is so that the compilation process can proceed in parallel across multipule CPUs and in what ever executing thread at the time. ... > Actually, it wouldn't, since a JIT like HotSpot JITS on-the-fly as code > is found to be useful in compiling. Traditional JITs compile > *everything* at the beginning, so there aren't as many races and such, > since no-code is executed until the compilation is complete. That's only if you have one thread doing the compilation and this isn't a traditional JIT in any way what so ever. You're almost certainly dealing with a JIT that can allow anything to compile code and shove into a data structure. Even a traditional JIT would benefit from parallel compilation since it's a more known operation and can concretely schedule threads to the work. It's a basic threading and resource contention problem in either case. bill To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-java" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20020322000416.GA1670>