Re: benchmarks Re: Upgrade cards

[Gregg Eshelman]

--- Darren <[EMAIL PROTECTED]> wrote:

> >As I say it more likely shuts off all the functions
> and just uses the 
> >50MHz CPU and the 16MHz FPU, hence the drop in FPU
> performance.
> >
> A 50mhz cpu and a 16 mhz fpu can run together?

Yes, when one is on an accelerator card.

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Re: benchmarks Re: Upgrade cards

[Darren]

>
>
>
>As I say it more likely shuts off all the functions and just uses the 
>50MHz CPU and the 16MHz FPU, hence the drop in FPU performance.
>
A 50mhz cpu and a 16 mhz fpu can run together?


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Re: benchmarks Re: Upgrade cards

[Mark Benson]

On Saturday, April 13, 2002, at 08:52 AM, Gregg Eshelman wrote:

>
> --- Mark Benson <[EMAIL PROTECTED]> wrote:
>> Well turning off both the PowerCache and PowerMath
>> options drops FPU
>> performance from 0.381 to 0.280 average (1 = Quadra
>> 605). I think that
>> shows a difference - don't you? That's a 33% speed
>> drop in FPU processes.
>
> What about the CPU performance? With PowerCache off
> it should be running on the logic board's CPU and
> FPU. Try the test with just PowerCache on.

Not likely considering I took the original 030 off to put the upgrade 
board on :) Just to make it absolutely clear for the fifth time so 
everyone knows, this PowerCache card is a CPU socket upgrade *not* a PDS 
expansion card (that has an Asante LAN card in it), remember this is an 
SE/30, not a IIci. As I stated in the last results post (may not have 
been clear), leaving the PowerCache switch ON and the toggling the 
PowerMath switch (rebooting in between) makes *no difference* to the FPU 
performance. I presume, seeing as it's a CPU replacement board the 
PowerCache switch turns off the other board funtions (50MHz FPU, 32k 
Cache etc.) and runs with the on-board FPU and the 50MHz 030.

> Does the boot process jump in speed when the Power
> Central CP loads when you have both switches Off?

It doesn't jump in speed ever because the machine can't swap for the 
16MHz to the 50MHz CPU, the 16MHz CPU is in a box under my bed 300 miles 
away ;).

> If it doesn't then the accelerator is disabled and
> you're using it as just a 32K cache card.

As I say it more likely shuts off all the functions and just uses the 
50MHz CPU and the 16MHz FPU, hence the drop in FPU performance.

I think that all proves the FPU on a PowerCache card is better than the 
on board FPU (or the FPU emulation on a non-FPU machine). As for SANE 
calls I don't know unless I can locate a SANE specific benchmark or 
something that specifically allows SANE to be analysed. Would TechTool 2 
do it?

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benchmarks Re: Upgrade cards

[Gregg Eshelman]

--- Mark Benson <[EMAIL PROTECTED]> wrote:
> Well turning off both the PowerCache and PowerMath
> options drops FPU 
> performance from 0.381 to 0.280 average (1 = Quadra
> 605). I think that 
> shows a difference - don't you? That's a 33% speed
> drop in FPU processes.

What about the CPU performance? With PowerCache off
it should be running on the logic board's CPU and
FPU. Try the test with just PowerCache on.

Does the boot process jump in speed when the Power
Central CP loads when you have both switches Off?
If it doesn't then the accelerator is disabled and
you're using it as just a 32K cache card.

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