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ekondis
Adept II
Adept II

AMDGPU-PRO driver global memory issue

I'm testing the AMDGPU-PRO Beta driver (16.20.3) on Ubuntu 16.04 by running some OpenCL tests. The most significant issue I've noticed is that only ~680MB are available out of the 4GB of a Radeon R9-Nano. Given that only 1/4 of that can be allocated using a buffer object this proves quite restrictive.

In addition, I've observed some performance issues comparing with the fglrx 15.302.

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ekondis
Adept II
Adept II

Re: AMDGPU-PRO driver global memory issue

Additionally, clinfo reports false info for compute unit count of R9 Nano (Fiji):

Max compute units:                            14

That should be 64.

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ekondis
Adept II
Adept II

Re: AMDGPU-PRO driver global memory issue

With the latest amdgpu-pro driver (16.30.3-306809) the memory issue was resolved. However, the reported number of compute units is still 14! Weird.

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jstefanop
Adept I
Adept I

Re: AMDGPU-PRO driver global memory issue

I am seeing the same issue with the R9 380s...memory bug was fixed, but only showing 14 CUs, and clock is capped at 555mhz regardless of what is set in the card BIOS.

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ekondis
Adept II
Adept II

Re: AMDGPU-PRO driver global memory issue

Clock is also reported to be 555MHz with Fiji. Power-play issue?

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ekondis
Adept II
Adept II

Re: AMDGPU-PRO driver global memory issue

On a FX-7500 mobile APU the reported number of CUs is 7 where the correct one is 6 (Spectre device).

Using AMDGPU-PRO v.16.30.3-315407 on Ubuntu 16.04 64bit

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