Quiet computer

[David King]

>> ~% time dd if=/dev/urandom bs=1024 count=10240 of=/dev/null
>> 10240+0 records in
>> 10240+0 records out
>> 10485760 bytes transferred in 15.957354 secs (657111 bytes/sec)
>> dd if=/dev/urandom bs=1024 count=10240 of=/dev/null  0.00s user
>> 15.85s system 99% cpu 15.970 total
> I'm also going to be doing a lot of SSL on a Poweredge 2950. So the
> above is purely a memory/cpu test correct? (not like doing IO tests
> where you want the size of the test data to be at least twice physical
> ram). Here's results for the Woodcrest- I assume this is only on a
> single core. Yes, I realize that the woodcrest is faster than above
> mentioned cpu, but a 100x speed difference? That doesn't seem realistic
> to me (although if those are valid results, I'd be pretty happy with
> that)...

Well, the Via Padlock has a hardware random-number generator, so the idea was to test that. It doesn't claim to be fast, just to be truly random

>
> bash-2.05b$ time dd if=/dev/urandom bs=1024 count=10240 of=/dev/null
> 10240+0 records in
> 10240+0 records out
> 10485760 bytes transferred in 0.154649 secs (67803598 bytes/sec)
>
> bash-2.05b$ time dd if=/dev/urandom bs=8k count=10240 of=/dev/null
> 10240+0 records in
> 10240+0 records out
> 83886080 bytes transferred in 1.165706 secs (71961615 bytes/sec)