[rescue] first real server hardware
mail at g-lenerz.de
Fri Apr 16 10:38:26 CDT 2004
Friday, April 16, 2004, 4:48:08 PM, you wrote:
>> How much better is an R10K/195 Octane than an R10K/195 Indigo2?
>> Generally more modern, yes, but is it tons faster?
good question. I have a Dual R10000/175 Octane for over a year now
and recently I've been given a R10000/195 Indigo 2. Ok, they don't
have the same CPU but I guess they give me a general feeling of the
For extremely heavy CPU bound work there is probably no big
difference between a R10K/195 Indigo 2 and a single R10K/195 Octane.
But what typical real-world homeuser exception is?
> Yes, it is TONS faster, even at the same clock speed. Strange but
It's probably the result of the more modern architecture. Higher
memory bandwidth, probably faster IO (XIO vs. GIO64), faster SCSI
bus and of course a totally different architecture.
> As I understand it, the memory subsystem is badly constricted
> on the Indigo2. There's also the I/O issue.
I've got a couple of STREAM results - some were taken from my
system, others from http://sites.inka.de/pcde/dbp/index.html for
which I've submitted most of my results:
Octane 175 MHz ~214 MB/s (avg., cc -Ofast)
Indigo 2 175 MHz ~108 MB/s (avg., cc -Ofast)
Indigo 2 195 MHz ~108 MB/s (avg., cc -Ofast) (no surprise)
I think I've seen much higher values for faster CPUs in the Octane.
Also the 214 MB/s is for one CPU only and if you run the binary on
both CPUs at the same time on a Dual-CPU machine IIRC the transfer
rate does not drop down to 50% for the individual test.
> If you move from an R10K/195 Indigo2 to an R10K/195 Octane, you will
> probably need to change your underwear when you see the difference.
Hmmm... if an R10K Octane is the target I'd strongly recommend a
Dual-CPU machine. It's more fun to have and maybe that also adds to
the feeling of performance. Even if you don't have any apps that run
on both, some load is always there that can be balanced between both
Gerhard mailto:mail at g-lenerz.de
Old SGI Stuff http://sgistuff.g-lenerz.de/
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