[MacOS][M1]Metal much slower than OpenCL

Troubleshooting
1

I tried to measure my model using metal which is recommended for macos, however the result is very bad , as shown below

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This troubles me a lot, because the result on cpu is faster than it which is about 50 ms.

With no idea, I tried changing metal to opencl , the result is much normal

image

the only difference in my code is just the target setting

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In my opinion, either metal needs extra settings or metal on m1 has bugs now.

Anyone know what causes this problem?

2

I am trying with the M1 Pro chip, and I also found this issue with the metal, which @vincentily has mentioned.

Is there anyone who can figure out this problem?

3

Have you tried AutoScheduler with metal target? The default scheduling is not good for this target, need to tune

4

ok , I will have a try, thanks

5

Hi，friend! Have you solved this problem? Is Metal faster than CPU after tuning?