Date: Mon, 2 Oct 2006 17:52:59 +0300 From: Vasil Dimov <vd@FreeBSD.org> To: Michel Talon <talon@lpthe.jussieu.fr> Cc: ports@freebsd.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: Yet another INDEX builder. Message-ID: <20061002145259.GA18470@qlovarnika.bg.datamax> In-Reply-To: <20061002142132.GA87608@lpthe.jussieu.fr> References: <20060930134951.GA89865@lpthe.jussieu.fr> <20060930184636.GA76783@xor.obsecurity.org> <20061002120228.GA15712@qlovarnika.bg.datamax> <20061002142132.GA87608@lpthe.jussieu.fr>
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On Mon, Oct 02, 2006 at 04:21:32PM +0200, Michel Talon wrote:
[...]
>=20
> Thanks a lot for this very interesting measurement. I note that using
> parallel makes takes 18 minutes at best and 20 minutes at worst, while
> build_index takes 26 minutes. I suppose parallel make runs faster because
> more of the work is spread over several processors. While in my case i la=
unch
> several makes, but there is always just one python process to read them.
This is a single processor machine. Not hyperthreaded nor multicored.
Running UP kernel.
[...]
>=20
> And now i have a problem, how is it that i spend only two minutes more th=
an
> you (and even one minute less than you if i do the same computation start=
ing
> from 23 minutes) while you have obviously a much more powerful machine th=
an
> me?
>=20
> niobe% dmesg
> ...
> FreeBSD 6.1-RELEASE #1: Thu May 11 14:54:37 CEST 2006
> CPU: Intel(R) Pentium(R) 4 CPU 3.06GHz (3073.65-MHz 686-class CPU)
I wouldn't exactly say that a single core Athlon @ 2.2GHz is
"much more powerful" than a HTT Pentium4 @ 3GHz. Disk throughput and
memory capacity are not the bottleneck in this case.
--=20
Vasil Dimov
gro.DSBeerF@dv
%
The Roman Rule
The one who says it cannot be done should never interrupt the
one who is doing it.
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