[ltp] Memory bandwith result from Memtest 86+?

[Jan Kundrát]

This is an OpenPGP/MIME signed message (RFC 2440 and 3156)
--------------enig5D74FD0DCDDF166C3BC3B5F1
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

jqian@physics.harvard.edu wrote:
> memtest 86+. A line in the screen piqued my interest: it shows that my =

> memory bandwidth is "1454MB/s". I'm not a memory expert at all, but my =

> two identical memories are VS1GSDS533D2, PC2-4200 DDR2 ram at 553MHz,=20

Check the frequency of RAM that memtes86+ reports. On my T60, it varies
from boot to boot, probably due to power management. I suspect that
memtest86+ does its benchmarking stuff just for a while and that whoever
is in charge of PM during that time (BIOS?) doesn't react fast enough to
increase the frequency.

> 	What kind of application will make memory bandwidth its main=20
> bottleneck?

Those that need simultaneous access to huge amounts of data. I guess
that number-crunching applications and other stuff doing heavy
computation (CAD?, compilers?). Given the horse power of any recent x86
computer, I'd say you won't notice much slowdown :).

Cheers,
-jkt

--=20
cd /local/pub && more beer > /dev/mouth


--------------enig5D74FD0DCDDF166C3BC3B5F1
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.7 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFHTqGtamXfqERyJRcRAmmoAJ42tL2XsdnmGk0PzfL68uS5bNFguwCeN/ww
kXQCHNIxCPao3FdFqc4S5P0=
=atvk
-----END PGP SIGNATURE-----

--------------enig5D74FD0DCDDF166C3BC3B5F1--