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Neil Marjoram wrote: | Doh! Hmmm, I will check this setting in Bios when the user has finished. | | Thanks, | | Neil. | On Wed, 2004-09-22 at 11:31, Markku Kolkka wrote: | |>Neil Marjoram kirjoitti viestissään (lähetysaika keskiviikko, 22. |>syyskuuta 2004 12:59): |> |>>I have just commissioned a 2 x Xeon 2.8Ghz 512MB 533Mhz FSB |>>compute node for research work. |>>(...) |>>Also I note from the output from top that the two processes |>>each consume 99.9% of CPU, but the total user at the top is |>>50%, and the idle is 50%. |> |>The CPUs are hyperthreaded and the OS sees them as four CPUs. |> |>-- |> Markku Kolkka |> markku.kolkka@xxxxxx
I would also check in the BIOS if ECC checking is happening in the RAM and/or the CPU cache. High end servers tend to have this enabled to prevent errors in memory, but can lead to a slow down.
The following faq give a little reasoning behind it (to the bottom):
http://www.simpletech.com/support/support_faq-mem.php#24
I am not saying this is the cause just something to investigate, I would suspect that it is something to do with the transfer from memory to CPU that is causing a slow down.
- -- Phil Hannent
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