On Mon, 18 Feb 2008, Pedro Espinoza wrote:

> The program appended below takes almost 9 minutes on RHEL 5, RHEL5.1,
> latest RHEL 4, Centos5.1. However, the same program takes 2m 15
> seconds on OPensuse 10.2 (2.6.18.8 kernel), and on Fedora 8. The box
> has 4 dual-core xeon processors, and with 8 GB memory.
>
> However, the same program takes 2min 45s on a box that has one
> dual-core opteron, with RHEL 4 ( 2.6.9-42.0.2.ELsmp SMP).

I'm not sure the number of cores really matters -- it seems to just grab
one (and about 196M of RAM) and cycle away.

On RHEL5.1, 2.6.18-53.1.6.el5 64-bit SMP w 8 dual core AMD 8220s (a
fairly active database server):

$ time ./sorttest 20

real   2m16.853s
user   2m15.721s
sys   0m1.078s

On an older RHEL4, Update 6, 2.6.9-67.0.1.ELsmp w 4 dual core AMD 880s
(DNS and authentication server, far less active):

$ time ./sorttest 20

real   2m19.578s
user   2m18.699s
sys   0m0.903s

These are fairly close, a little less sys time on the quieter system, but
slightly more real/user time. I don't have gcc installed on the one
OpenSUSE system we have, so no way to compare it.

-- DCP

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