Forums - Inconsistent data samples

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Inconsistent data samples
sof.chetoui
Join Date: 10 Jun 20
Posts: 1
Posted: Wed, 2020-10-14 10:21

I am using the version v2020.1.0.4172020 of the snapdragon profiler to collect CPU and GPU performance counters. The used plateform is the Google Pixel 2 XL (the 835 Soc)

I  performed the data collection using the realtime mode.  However, when exported the data (csv file) and looked at the timestamps vector/column I noticed that :

  1. Not all the performance counters have the same time samples. In other words, even if I am using the same sampling rate for all the performance counters, and starting the data collection at the same time, it seems that not all the performance counters are collected at a specific time.
  2. The starting and ending time of the data collection of each PC varies. Even if I launched the realtime collection for all the counters at the same time.
  3. The number of collected samples per performance counter vary, which is one hand related to the start and end time, but I guess it might be also related to inconsistent sampling rate accross different PC.

Briefly, I want to be able to collect the list of all the CPU-GPU performance counters that I choose at the same timestamps. Is this known bug ? or is there a better way to do this ?

 

Thanks

 

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