Date: Thu, 24 Aug 2006 15:06:52 -0400 From: Kris Kennaway <kris@obsecurity.org> To: Laurent C <laurent.bar@gmail.com> Cc: freebsd-stable@freebsd.org Subject: Re: [AMD64-SMP] I can't get my cpus working at 100% Message-ID: <20060824190651.GA49364@xor.obsecurity.org> In-Reply-To: <e92de5ef0608241109x2aa5b79u32a4e304d34f29d5@mail.gmail.com> References: <e92de5ef0608241109x2aa5b79u32a4e304d34f29d5@mail.gmail.com>
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--5vNYLRcllDrimb99 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Aug 24, 2006 at 08:09:35PM +0200, Laurent C wrote: > Hello all, >=20 > I can't get my athlon x2 processor working at 100% on cpu-intensive apps. > I've made some tests with "john --test" and "transcode", wich are both > multithreaded apps. >=20 > For example if I launch transcode it takes between 50% and 55% cpu (on to= p), > and if I launch > a second transcode session on another file, the total cpu used on top is > 100%, without lower the speed > of the first transcode session. >=20 > The same behavior occurs with john. A single "john --test" give me some > speed results, and the same > command with a transcode or second "john --test" give me the same speed > results but now with 100% > cpu used. >=20 > I made a "portupgrade -auf" just after building and installing my SMP ker= nel > and World, to be sure all is up-to-date. >=20 > So it's seems it's not a "top" output problem, but a real underuse of the > computing power. >=20 > %uname -a > FreeBSD wks02.chez.oim 6.1-STABLE FreeBSD 6.1-STABLE #0: Thu Aug 17 18:47= :31 > CEST 2006 laurent@wks02.chez.oim:/usr/obj/usr/src/sys/WKS02_SMP amd64 >=20 > Does anyone could explain me what's happening with my system ? How do you know the applications are running with two threads? Presumably you need to specify the amount of parallelism. Kris --5vNYLRcllDrimb99 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (FreeBSD) iD8DBQFE7fjLWry0BWjoQKURAg5KAJ0WMnqPRU8ZmeRzukkqjS2rvGGvQgCg0wTP RJ5nDy5a4P30yPC0I/6Sbq8= =QeNu -----END PGP SIGNATURE----- --5vNYLRcllDrimb99--
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