# Problem with nvprof

**URL:** <https://forums.developer.nvidia.com/t/problem-with-nvprof/55113>\
**Category:** CUDA Programming and Performance\
**Created:** [November 12, 2017, 12:38pm UTC](https://forums.developer.nvidia.com/t/problem-with-nvprof/55113 "2017-11-12T12:38:13Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Sinay](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@Sinay](https://forums.developer.nvidia.com/u/Sinay)\
**Post date:** [November 12, 2017, 12:38pm UTC](https://forums.developer.nvidia.com/t/problem-with-nvprof/55113/1 "2017-11-12T12:38:13Z")

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Hello,  
i am trying to measure the gld\_throughput and gst\_throughput of my kernel with nvprof. My kenrel is a multiplication of 2 arrays with various dimensions. It was all great when suddenly i measured the throughput of the multiplication of huge arrays (8192x8192) and the result was “OVERFLOW”. After this, when i measure the throughput of the muliplication of smaller arrays which i had already measured, the throughput is much smaller than the throughput i had. But the execution time is always the same. So i suppose the small throughput is not correct because if it was, my execution time would be much bigger.  
Any ideas?  
Thank you in advance!