[Vm-dev] OS X Mavericks & cog tickers

[John McIntosh]

On Thu, Oct 24, 2013 at 8:09 PM, Igor Stasenko <siguctua at gmail.com> wrote:

>
>
>
>
> On 25 October 2013 02:05, John McIntosh <johnmci at smalltalkconsulting.com>wrote:
>
>>
>>
>>
>>
>> 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...
>>
>>
>
> you mean stepping?
> you can signal that semaphore if someone needs to step, as easy as:
>
> [ [stepTime asDelay wait. sema signal ] repeat ] fork
>
> (sure not exactly like above, but you got an idea)
>
> i see no problem here.
>


Right except you are right back to stepping 50 times a second, are you sure
you need to do that?



>
>
>>
>>>
>>> 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
>>
>> ===========================================================================
>>
>>
>>
>
>
> --
> 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/20131024/167bc368/attachment-0001.htm