Re: [Rpcemu] RPCEmu 0.8.11

In message <a0f19f9f53.pittdj+@iyonix.home>
David Pitt <pittdj@pittdj.co.uk> wrote:

> In message <6d9d959f53.George@tiscali..co.uk>
> george greenfield <george.greenfield@tiscali.co.uk> wrote:
>
>> In message <mpro.mv61td00381ke03n2.pittdj@pittdj.co.uk>
>> David Pitt <pittdj@pittdj.co.uk> wrote:
>
>>> Peter Howkins, on 23 Oct, wrote:
>>>
[Snip]
>
> I have just tried a brief test or two but they don't really tell us
> much. The tests are !Desk_Bogo and Dhrystones.
>
> bogomips dhrystones
>
> Ubuntu 12.04 on VMware on an iMac, rpcemu 0.8.11
> Phoebe OS3.80 Interpreter 41 98,396
> SA110 OS5.21 Recompiler 117 481,463
>
> This is not like for like, no surprises, the Recompiler is a lot
> faster.
>
> Mac OS X Mavericks, rpcemu 0.8.9
> SA110 OS5.21 Recompiler 159 627,746

ROMark scores c.610k dhrystone MIPs on my 0810/520 Recompiler
installation here, running on a Dell XPS 3.4GHz i7 Win7/64 platform.
>
> This is more interesting there is that much difference between the
> Virtual Machine and native installations.
>
> Mac OS X Mavericks, VRPC
> OS4.39 320 484,730
>
> There is the oft repeated story that !Desk_Bogo favours VRPC, but
> Dhrystones indicate rpcemu is faster.

Indeed: that suspicion is supported by Chris Hall's benchmarks here
https://www.riscosopen.org/forum/forums/5/topics/466?page=8
where VRPC on a 2668MHz PC gives only 175% compared to a bog-standard
S/ARM RPC, i.e. 1524MHz = 100%; the corresponding figure for RPCEmu
here is approx. 1000MHz = 100%. Obviously that assumes a similar
processor type in the 2668MHz machine, which may not be the case.
>
> Raspberry Pi
> OS5.21 401 995,024

That's a very high dhrystone figure for a Pi: I got 450,080 when I
tested one recently.
>
> Emulators not too dusty then!

No indeed.
>
> Phoebe in hardware might have been a step forward but that might not
> apply to an emulation.
>
As Peter H has just explained.

--
george greenfield

_______________________________________________
Rpcemu mailing list
Rpcemu@riscos.info
http://www.riscos.info/cgi-bin/mailman/listinfo/rpcemu