Date: Thu, 12 Oct 2006 09:40:43 -0400 From: "Bucky Jordan" <bjordan@lumeta.com> To: "David King" <dking@ketralnis.com>, <freebsd-hardware@freebsd.org> Subject: RE: Quiet computer Message-ID: <78ED28FACE63744386D68D8A9D1CF5D4209C94@MAIL.corp.lumeta.com> In-Reply-To: <F0D5BCE3-084C-4755-B07E-3EA7AF182BEF@ketralnis.com>
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> > also, try to test the speed of the true random number generator > > (I don't know how to access it; maybe just dd /dev/urandom?) >=20 > Here's one: >=20 > ~% time dd if=3D/dev/urandom bs=3D1024 count=3D10240 of=3D/dev/null > 10240+0 records in > 10240+0 records out > 10485760 bytes transferred in 15.957354 secs (657111 bytes/sec) > dd if=3D/dev/urandom bs=3D1024 count=3D10240 of=3D/dev/null 0.00s = user > 15.85s system 99% cpu 15.970 total >=20 > ~% time dd if=3D/dev/random bs=3D1024 count=3D10240 of=3D/dev/null > 10240+0 records in > 10240+0 records out > 10485760 bytes transferred in 15.967514 secs (656693 bytes/sec) > dd if=3D/dev/random bs=3D1024 count=3D10240 of=3D/dev/null 0.01s user = 15.85s > system 99% cpu 15.976 total >=20 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)... bash-2.05b$ time dd if=3D/dev/urandom bs=3D1024 count=3D10240 = of=3D/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=3D/dev/urandom bs=3D8k count=3D10240 = of=3D/dev/null 10240+0 records in 10240+0 records out 83886080 bytes transferred in 1.165706 secs (71961615 bytes/sec) Thanks, Bucky
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