Mobile, Graphics, and Gaming forum ARM_import_memory API is very slow

State Accepted Answer
+1 person also asked this people also asked this
Locked Locked
Replies 5 replies
Subscribers 138 subscribers
Views 20849 views
Users 0 members are here

2025 survey

We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.

Options

How was your experience today?

This discussion has been locked.

You can no longer post new replies to this discussion. If you have a question you can start a new discussion

ARM_import_memory API is very slow

Shouwen over 7 years ago

I want to use clImportMemoryARM API to achieve zero copy between CPU and GPU.

However, the performance is not what I expected. For a FHD image, it takes 4.4 ms for importing, almost identical to uploading explicitly.

Is this slow performance expected? I am using Mali G72 GPU.

Thanks,

-Shouwen

Top replies

Kévin Petit over 7 years ago in reply to Shouwen +1 verified

Hi Shouwen, Sorry for the delay (and the disappointing performance). You're doing nothing wrong and this is definitely not the kind of performance we're expecting. You can get the DDK version using...
Kévin Petit over 7 years ago in reply to Vijay K +1 verified

Hi Vijay, Thanks for the details. Looking again at the code you've shared, I think I understand why you're finding the import call slow. Linux over-commits memory which means that when you're calling...