In message <[email protected]> Peter Howkins <[email protected]> wrote:
> On Tue, Aug 20, 2013 at 05:09:40PM +0100, George wrote: >> I've been running 0.8.10/5.20 daily for about a week now, and have >> noticed an oddity relating to the MIPS readout on the header bar, >> which seems to display activity (sometimes /a lot/ of activity - up to >> 1400 on one occasion(!) and generally around 250-350 on my system*) >> regardless of whether any application is active (i.e., when TaskUsage >> will be displaying '0' or low single-figure activity levels). > > RISC OS machine by default don't have any power-saving (with reduce > cpu-usage off), they run flat out providing wimp null events even when > there's no apps running anything. This busy-wait loop uses up CPU cycles, > which are the MIPS you're seeing. > [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 ... I re-selected Settings-Reduce CPU Usage this morning and hey presto, behaviour is back to normal, i.e., MIPS readout drops to 1 or 2 shortly after desktop or other activity ceases. Hey ho..... George -- George _______________________________________________ Rpcemu mailing list [email protected] http://www.riscos.info/cgi-bin/mailman/listinfo/rpcemu
