I know that there is function clock() in CUDA where you can put in kernel code and query the GPU time. But I wonder if such a thing exists in OpenCL? Is there any way to query the GPU time in OpenCL? (I’m using NVIDIA’s tool kit).
Share
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I know that there is function clock() in CUDA where you can put in kernel code and query the GPU time. But I wonder if such a thing exists in OpenCL? Is there any way to query the GPU time in OpenCL? (I’m using NVIDIA’s tool kit).
The NVIDIA OpenCL SDK has an example Using Inline PTX with OpenCL. The clock register is accessible through inline PTX as the special register %clock. %clock is described in PTX: Parallel Thread Execution ISA manual. You should be able to replace the %%laneid with %%clock.
I have never tested this with OpenCL but use it in CUDA.
Please be warned that the compiler may reorder or remove the register read.