Richard Levitte - VMS Whacker wrote:
>
> CDive> Even if the hardware is capable of symmetric operations, it is
> CDive> probably to slow to go down to it to perform the operation.
>
> Depends. If it takes load away from the central CPU, it might be a
> good thing from that point of view, by increasing over-all performance
> even if the hardware acceleration isn't performing very well if it's
> viewed as an isolated entity.
But you have I/O then. The over-all system performance might be
lower. Also I wonder if hardware crypto devices can handle several
outstanding operations at the same time. If only single operation is
allowed you would have to queue the operations to the device which
is very likely not optimal (fragmentation due to locking).
Disclaimer: I do not have much experience with hardware crypto
devices.
Ciao, Michael.
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