[Vm-dev] [Pharo-dev] Reducing the activity of the image

Eliot Miranda eliot.miranda at gmail.com
Tue Feb 10 01:05:31 UTC 2015

Hi Tim,

On Mon, Feb 9, 2015 at 5:02 PM, tim Rowledge <tim at rowledge.org> wrote:

> On 09-02-2015, at 4:53 PM, Eliot Miranda <eliot.miranda at gmail.com> wrote:
> >
> > No.  The heartbeat is extremely cheap.  It is the idle loop that calls
> ioRelinquishProcessorForMicroseconds which in turn calls aioSleepForUsecs
> which calls select:
> >
> Happy to be shown wrong. That means it most likely is morphic and/or any
> other tucked away processes. On a Pi it seems to be about 15% cpu time, so
> there is certainly some interest in reducing it!

it is this one:

"A default background process which is invisible."

[self relinquishProcessorForMicroseconds: 1000] repeat

If you recall the VW VM, that got rid of the background process and when
the VM scheduling loop finds nothing to run it calls a blocking routine.

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