What architecture and kernel are you running? Joshua A. Richardson General Dynamics AIS Principal Systems Engineer Systems Administrator Office: 703-272-1761 Cell: 540-383-9093 -----Original Message----- From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of yaconsult Sent: Friday, December 04, 2009 5:21 PM To: redhat-list@xxxxxxxxxx Subject: overclocking at -40 degrees C - windows boots,linux doesn't at some bios settings The basic question here is what are the differences between running linux on a highly overclocked system versus running windows on the same hardware? We have an expert in the field doing the overclocking and he finds that bios timing settings that pass all stress testing under windows won't even boot under linux. He has to back off on the overclocking for the system to boot linux. The hardware used is the same in both cases - only a disk swap is involved. The OS is Redhat 5.4 with all updates and cpuspeed is disabled. The system is being used to run Synopsys software that is capable of keeping all of the cores saturated. Some runs take many, many hours. Are there kernel parameters or other system tuning that needs to be done when the system is highly overclocked? We're talking about a clock speed of around 4.8 GHz on a core i7 with 12 GB of triple-channel memory. He's currently investigating his hunch of possible bandwidth issues by removing some memory. The guy doing the tuning paid for a support call to Redhat and came back saying the Redhat guy told him that linux "couldn't keep up" at that speed... Uh, what?! Thanks for any hints, clues, pointers, etc. -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
