Re: [amibroker] Re: profiler checks and finds cci function most offending

["Tomasz Janeczko" <groups@xxxxxxxxxxxxx>]

Maybe you are running on laptop with energy saving enabled
or SpeedStep or Cool&Quiet or other kind of CPU throttling.
Things like CPU clock throtling may do strange things not only
to performance but also to numbers reported by RDTSC instructions.

http://support.microsoft.com/?id=896256

Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message ----- 
From: "murthysuresh" <money@xxxxxxxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Friday, August 22, 2008 6:30 PM
Subject: [amibroker] Re: profiler checks and finds cci function most offending


> the default. here is the timings that i am seeing
> 
> 
> start=GetPerformanceCounter(); 
> CCIVAL=CCI(14);
> finish=GetPerformanceCounter(); 
> printf( "lapsedtime in ms = %g ", abs(finish-start) );
> 
> 
> i am getting 505 ms. does not add up for me. what else can i look at 
> to trouble shoot it.
> 
> --- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@xxx> 
> wrote:
>>
>> The timing is somewhat strange. The CCI is computationally 
> intensive (with complexity
>> O(Range * NumBars )) but still your timinings are weird.
>> 
>> I have done check on 80000 bars with rather long-period CCI( 150 ) 
> and it takes just 26 ms.
>> 
>> You have less bars in your example. What PERIOD of CCI are you 
> using ?
>> 
>> Best regards,
>> Tomasz Janeczko
>> amibroker.com
>> ----- Original Message ----- 
>> From: "murthysuresh" <money@xxx>
>> To: <amibroker@xxxxxxxxxxxxxxx>
>> Sent: Friday, August 22, 2008 3:21 PM
>> Subject: [amibroker] profiler checks and finds cci function most 
> offending
>> 
>> 
>> > the cci function provided by afl seems to cause .5 seconds to 
>> > calculate. i find that to be astonishing.
>> > 
>> > here are the screenshots of the profiler showing the overall 
> timing 
>> > with and without the cci.
>> > i am lost for words and dont know what to do as cci is a big part 
> of my 
>> > charting exercise
>> > 
>> > http://screencast.com/t/NInZ3HQK with cci 
>> > http://screencast.com/t/Dlki7CxwJ without cci
>> > 
>> > 
>> > ------------------------------------
>> > 
>> > Please note that this group is for discussion between users only.
>> > 
>> > To get support from AmiBroker please send an e-mail directly to 
>> > SUPPORT {at} amibroker.com
>> > 
>> > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
>> > http://www.amibroker.com/devlog/
>> > 
>> > For other support material please check also:
>> > http://www.amibroker.com/support.html
>> > Yahoo! Groups Links
>> > 
>> > 
>> >
>>
> 
> 
> 
> ------------------------------------
> 
> Please note that this group is for discussion between users only.
> 
> To get support from AmiBroker please send an e-mail directly to 
> SUPPORT {at} amibroker.com
> 
> For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
> http://www.amibroker.com/devlog/
> 
> For other support material please check also:
> http://www.amibroker.com/support.html
> Yahoo! Groups Links
> 
> 
> 

------------------------------------

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