Messages in this thread | | | Date | Fri, 23 Jun 2006 13:42:26 -0700 (PDT) | From | Danial Thom <> | Subject | Re: Measuring tools - top and interrupts |
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> Network traffic is usually IO bound, not CPU > bound. The load figures > top shows tell something about the amount of > work the CPU has to do, > not about how busy your PCI bus (or whatever > bus the NIC lives on) is. > > IIRC the networking layer in 2.6 differs quite > a lot from 2.4, so the > load average figures can be quite misleading. >
For the record, *most* of the work are I/O calls (ie reading and writing registers), which are not in the "background". I/O calls become more and more expensive as the bus becomes saturated as it takes longer to get the bus to do the operation.
DT
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