Archives Discussions

[fajsc88]

Does AMD have plans to support "zero copy" using CL_MEM_USE_PERSISTENT_MEM_AMD for Linux?  The documentation says this is only supported on Windows.  If AMD has plans to support this, when can we expect it?

[jeff_golds]

It is supported when VM is supported.  Currently, that means on HD79xx only.  You can tell if VM is supported by checking clinfo as the driver version will report VM.

From clinfo:

  Driver version:                                CAL 1.4.1695 (VM)

[nou]

VM is virtual memory? and will it be supported on older cards and APU like 5xxx and 6xxx?

[jeff_golds]

Yes, VM stands for Virtual Memory.  Current support in Linux is limited to HD79xx series.  I can't comment on support for other GPUs at this time.

[fajsc88]

Are there any plans to support zero-copy buffers on Linux for APU chipsets?  Or will this always be limited to Windows?

[nou]

that was answered already. he can't comment on it.

[vanja_z]

Q: Will X be supported on Linux?

Typical A: X is not supported on Linux at this time.