OpenCL™ Developer Guide for Intel® Processor Graphics
2019 Update 4
Intel® Turbo Boost Technology Support
Intel® Turbo Boost Technology applies to CPU cores and to the Intel Graphics device. The Intel Graphics and the CPU must run within the thermal constraints of the system. Thus, either the CPU or the Intel Graphics might boost or throttle the frequency as needed.
Frequency change on one device impacts the other. Too intensive application polling (such as looping on some flag waiting for the Intel Graphics to complete the job) can cause an increase in CPU frequency, which can negatively impact the Intel Graphics performance.