topic Usually if you ran in Analyzers

vtune problem

rohit_t_ — Wed, 23 Jan 2013 07:30:15 GMT

hi !

plz help me out with this issue.!when i ran a very simple C++ program for hotspot analysis.it succesfully collected ,analysed and finalized the result

still sometimes its shows functions with some CPU values and sometimes show " NO DATA TO SHOW / NO DATA IS AVAILABLE".

please tell me how to get the data when this "NO DATA IS AVAILABLE" situation arises.

Usually if you ran

Peter_W_Intel — Wed, 23 Jan 2013 08:40:06 GMT

Usually if you ran application shortly, there is no result to how. Please add more workloads in your program.

Usually if you ran

Peter_W_Intel — Wed, 23 Jan 2013 08:42:11 GMT

Usually if you ran application shortly, there is no result to how. Please add more workloads in your program.

thanks for suggestion.I ll

rohit_t_ — Wed, 23 Jan 2013 09:00:23 GMT

thanks for suggestion.I ll try this way also

thanks for suggestion.I ll

rohit_t_ — Wed, 23 Jan 2013 09:01:09 GMT

thanks for suggestion.I ll try this way also

Maybe your application run so

Bernard — Wed, 23 Jan 2013 18:07:34 GMT

Maybe your application run so fast(short period of time) and was below the measurement threshold.I experienced such a behaviour.

Quote:iliyapolak wrote:

Peter_W_Intel — Thu, 24 Jan 2013 02:37:18 GMT

iliyapolak wrote:

Maybe your application run so fast(short period of time) and was below the measurement threshold.I experienced such a behaviour.

Default interval time is 10ms. You might copy from Hotspots analysis to create a new custom analysis - change interval value to 2ms if you like.

>>>Default interval time is

Bernard — Thu, 24 Jan 2013 05:19:21 GMT

>>>Default interval time is 10ms. You might copy from Hotspots analysis to create a new custom analysis - change interval value to 2ms if you like>>>

Thanks Peter.

Can I change time measurement interval to even lower value for example in range 0.1-0.2 msec , because I'm testing a FFT alghorithm which finishes execution of its code very quickly ~125000 nanosec?In order to perform precise timing I needed to increase data set size to more than 4096 points.

Quote:iliyapolak wrote:

Peter_W_Intel — Thu, 24 Jan 2013 08:14:43 GMT

iliyapolak wrote:

>>>Default interval time is 10ms. You might copy from Hotspots analysis to create a new custom analysis - change interval value to 2ms if you like>>>

Thanks Peter.

Can I change time measurement interval to even lower value for example in range 0.1-0.2 msec , because I'm testing a FFT alghorithm which finishes execution of its code very quickly ~125000 nanosec?In order to perform precise timing I needed to increase data set size to more than 4096 points.

No. 2ms is minimal value for interval, I recommend.

thanks peter !

rohit_t_ — Thu, 24 Jan 2013 10:11:48 GMT

thanks peter !

error resolved ! reducing the time -interval to 2ms did work !

>>>No. 2ms is minimal value

Bernard — Thu, 24 Jan 2013 17:19:53 GMT

>>>No. 2ms is minimal value for interval, I recommend.>>>

Thank you Peter.