[CentOS] High load averages copying USB
Lamar Owen
lowen at pari.eduFri Apr 20 14:58:58 UTC 2012
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On Friday, April 20, 2012 10:54:51 AM Les Mikesell wrote: > The CPU has to do the work of the transfer over usb - which is why it > is cheap. Real disk controllers use DMA without a lot of CPU > involvement. And this includes USB 3.0, incidentally. I have found that on my Fedora 14 (soon to be C6) laptop with a USB 3.0 ExpressCard interface that the load is less on USB 3 and it is on the laptops built-in USB 2 ports. YMMV.
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