Messages in this thread | | | Date | Sun, 12 May 2013 11:53:37 -0500 | From | Rob Landley <> | Subject | Re: high-speed disk I/O is CPU-bound? |
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On 05/10/2013 09:04:44 AM, David Oostdyk wrote: > Hello, > > I have a few relatively high-end systems with hardware RAIDs which > are being used for recording systems, and I'm trying to get a better > understanding of contiguous write performance. ... > The question is, is it possible that high-speed I/O to these hardware > RAIDs could > actually be CPU-bound above ~1400MB/sec?
In some setups your processor is calculating CRCs for the data. It's a fairly cheap operation, but a cheap operation on gigabytes of data can still saturate your memory bus.
Rob
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