Date: Thu, 15 Feb 2001 20:53:59 -0500 From: Seth Leigh <seth@pengar.com> To: freebsd-smp@freebsd.org Subject: Re: possible problem with SMP? Message-ID: <5.0.2.1.0.20010215204946.027a3c88@hobbiton.shire.net> In-Reply-To: <200102160122.RAA08035@sharmas.dhs.org> References: <14987.27399.662691.291906@nomad.yogotech.com> <5.0.2.1.0.20010214234050.026959f8@hobbiton.shire.net> <14987.27399.662691.291906@nomad.yogotech.com>
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With the normal threads library under Solaris (/usr/lib/libthread.so.1 and /usr/lib/libpthread.so.1) the default mode of operation is indeed n:m. However, if you declare a pthread_attr_t and call pthread_attr_setscope() on it with PTHREAD_SCOPE_SYSTEM, then any threads created subsequently are bound to an lwp. Threads created with PTHREAD_SCOPE_SYSTEM are 1:1. Additionally, with Solaris 8 there is an alternate threads library (/usr/lib/lwp/libpthread.so.1) which is strictly 1:1. Ie: bound threads are all you get, and all scheduling and such is left to the kernel. Seth At 05:22 PM 2/15/2001 -0800, Arun Sharma wrote: >On 15 Feb 2001 06:37:23 +0100, Nate Williams <nate@yogotech.com> wrote: > > Sun's JDK uses a one-one mapping, because > >Do you have any references for this ? libpthread on Solaris uses n:m >mapping, AFAIK. > > -Arun > > >To Unsubscribe: send mail to majordomo@FreeBSD.org >with "unsubscribe freebsd-smp" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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