[Rpcemu] 0.8.10/5.20: MIPS readout oddity

Tony Moore old_coaster at yahoo.co.uk
Wed Aug 21 08:57:38 PDT 2013


On 21 Aug 2013, Peter Howkins <rpcemu.howkins at marutan.net> wrote:
> On Tue, Aug 20, 2013 at 05:09:40PM +0100, George wrote:

[snip]

> > Selecting Settings-Reduce CPU Usage doesn't seem to affect the
> > behaviour.
>
> However, this should have kicked in the power-saving stuff. *provided*
> that the OS starts seeing enough null events, e.g. if you're running a
> task that uses all spare cpu in risc os, this will have no effect.
>
> After about 10 seconds you should see the mips count start to drop ...
> unless something has changed in RO 5.20 from earlier ...

Here, 'Reduce CPU Usage' seems to be working, with RPCEmu0810/RO520.
Loading NetSurf, and fetching the BBC website, causes the MIPS value to
increase to about 150 but, after a few seconds, drops to less than 1.0.
Scrolling the displayed page, also causes a similar increase, which
again drops to a low value, when there is no activity.

Recently, Settings > CD-ROM showed 'Disabled' but. in rpc.cfg. I found
cdrom_enabled = 1. George may find it worth checking, in rpc.cfg, that
cpu_idle = 1 , in fact.

Tony






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