DECstation question.

Eric Young (eay@cryptsoft.com)
Thu, 30 Apr 1998 17:03:32 +1000 (EST)

• Previous message: Alex_Rahim@vnu.co.uk: "MSIE4 Cert Y2K Bug ? (off - topic ?)"

This question is a little strange, but I've been unable to find the
information anywhere else. Having spent several hours on the dec web pages to
no avail, I'm getting rather desperate.

I have sitting at work a DECstation 5000/125, running ultrix 4.3.
Recently I've been writing MIPS assember (mips1 and mips3) and I'm wanting to
get a feel for the relative difference between the ultrix R3000 CPU,
R4400 and R10000 CPUs for the same clock speed.

Now SGI is nice and has a hinv command to tell you the CPU type and clock
speed, I cannot find this information/command for the DECstation. Nothing on
startup, or in the message logs and the chips themselves are not visable due
to heat sinks stuck on top of them. psrinfo only came in with OSF. So the
question is, does anyone know what the clock speed for a DECstation 5000/125
was, or know how to find this out under ultrix?

many thanks if anyone can respond.

eric

The numbers are normalised for clock
                  1 2 3 1::2 1::3 2::3
                R3000 R4400 R10000
rsa 512 bit 0.0870s 0.0130s 0.0034s 1.67 7.11 4.25
rsa 1024 bit 0.4881s 0.0697s 0.0149s 1.78 9.10 5.12
rsa 2048 bit 3.2750s 0.4664s 0.0880s 1.76 10.34 5.89
rsa 4096 bit 23.983s 3.4067s 0.5933s 1.69 10.77 6.34

R3000 50?mhz, 32bit assember
R4400 200mhz, 64bit assember
R10000 180mhz, 64bit assember
I have the R10000 and R44000 32 bit assember times at home, but they are about
half of the 64bit values.

So, basically, for bignum stuff, the R10000 is about 5 times faster than the
R4400 on a clock by clock basis. The R3000, depending on the exact clock
speed, is probably about the same grunt as the R44000 (when in 32 bit mode).

• Previous message: Alex_Rahim@vnu.co.uk: "MSIE4 Cert Y2K Bug ? (off - topic ?)"