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Date: Thu, 14 Jun 2007 16:35:16 +0100
From: Chris McClements <cmcclements AT computing DOT dundee DOT ac DOT uk>
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Subject: Re: Cygwin allocted time slice
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Aaron Gray wrote:
>> On Thu, Jun 14, 2007 at 04:15:40AM +0100, Aaron Gray wrote:
>>> Cygwin seems to only use a small amount of time slice relative to the
>>> ammount of time slice availiable.  Compiles, builds and testsuite are
>>> relly slow compared to MinGW which takes too much time.
>>>
>>> 'time' results confirm this.  Process time is about 1/4 of the total
>>> system time.
>>>
>>> It i very noticable on compiling and testing GCC as compared to the
>>> same on Linux or MinGW.
>>>
>>> Is there any way to give Cygwin a bigger slice of the pie ?
>>>
>>> Say 50% or 75% ?

Process scheduling is an operating system task.

>>
>> How do you suppose Cygwin is managing this interesting feat of only
>> using some of the CPU time?  What Windows API is Cygwin using to just
>> grab a small slice of the time?
> 
> Weird I was getting very long compile times for GCC and on using 'time' 
> was getting indications that make was only getting 25% of total system 
> time.
> 

File IO?

> I'll see if it is repeatable on another system.
> 
>> As a follow-up question:  Why do you suppose we are punishing you by
>> not allowing Cygwin to use all of the CPU by default?
>>
>> Oh.  Wait.  WJM.  Nevermind.
> 
> Weird reply, no need to take the micky !

Hes trying to tell you you've got the wrong idea. Why try to assert things about 
time slices when you clearly are not sure about what is going on?

> 
> Aaron
> 
> 
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