[Beowulf] detection and diagnosis of PCI bus saturation

Jim Lux James.P.Lux at jpl.nasa.gov
Fri Sep 8 13:43:42 EDT 2006


At 09:18 AM 9/8/2006, H.Vidal, Jr. wrote:
>Hello.
>
>Does anybody here have any thoughts, experiences, or references
>to diagnostic methods when looking into potential PCI bus saturation?
>
>If one is moving data across the bus, either under CPU copies or under
>DMA/bus master, are there canonical methods to detect, perhaps
>in bridge chip registers or other, the state and/or counts of
>bus collisions and/or saturation?

There are hardware solutions for this that I am aware of (e.g. logic 
analyzers/oscilloscopes and bus monitors), but I don't know about 
software approaches.


>Your help would be greatly appreciated. Thanks.
>
>Hernando Vidal, Jr.
>Tesseract Technology
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James Lux, P.E.
Spacecraft Radio Frequency Subsystems Group
Flight Communications Systems Section
Jet Propulsion Laboratory, Mail Stop 161-213
4800 Oak Grove Drive
Pasadena CA 91109
tel: (818)354-2075
fax: (818)393-6875 


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