[Vm-dev] OS X Mavericks & cog tickers

[John McIntosh]

On Thu, Oct 24, 2013 at 8:02 PM, Igor Stasenko <siguctua at gmail.com> wrote:

>
>
>
>
> On 25 October 2013 01:43, John McIntosh <johnmci at smalltalkconsulting.com>wrote:
>
>>
>>
>>
>>
>> On Thu, Oct 24, 2013 at 7:38 PM, tim Rowledge <tim at rowledge.org> wrote:
>>
>>>
>>>
>>> On 24-10-2013, at 4:34 PM, Igor Stasenko <siguctua at gmail.com> wrote:
>>> >
>>> >
>>> > (e) Cog uses heartbeat timer to interrupt interpreter at regular time
>>> periods
>>> > what can be done, i think it to suppress heartbeat, during
>>> relinquishProcessorForMicroseconds execution.
>>> > but that won't buy much, unless we increase the time period to sleep
>>> to be times larger than heartbeat cycle (both are 1ms).
>>>
>>> If I understood, the timer coalescing can push timers around to produce
>>> spurts of activity followed by quiescence; this results in better overall
>>> power performance. It *might* cause problems with a high-frequency
>>> heartbeat.
>>>
>>
>>
>> You pick the "drain my battery real fast" option.... Also in the past
>> known as "higher performance" to remove the delay in the morphic polling
>> loop.
>>
>>
> yeah, we should get rid of that polling thing and Delay, instead make it
> wait on semaphore..
>

Morphs have an expectation of being called 50 times a second, you'll need
to fix that first...


>
>
> P.S. what i missing on BSD systems is good analogy to
> WaitForMultipleEvents() function which available
> in Windows kernel. It is far superior to select() and poll().
> i don't know, if situation is improved in this are since last time i
> checked.
>
>
>>
>>>
>>> tim
>>> --
>>> tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim
>>> The problem with the gene pool is that there is no lifeguard.
>>>
>>>
>>>
>>
>>
>> --
>>
>> ===========================================================================
>> John M. McIntosh <johnmci at smalltalkconsulting.com>
>> Corporate Smalltalk Consulting Ltd. Twitter: squeaker68882
>>
>> ===========================================================================
>>
>>
>>
>
>
> --
> Best regards,
> Igor Stasenko.
>
>


-- 
===========================================================================
John M. McIntosh <johnmci at smalltalkconsulting.com>
Corporate Smalltalk Consulting Ltd. Twitter: squeaker68882
===========================================================================
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.squeakfoundation.org/pipermail/vm-dev/attachments/20131024/f34ba64a/attachment.htm