Documentation about AMD's HSA implementation?

[Ming Yang]

Thanks for the suggestions!  But I might ask several specific
questions, as I can't find the answer in those documents, to give
myself a quick start if that's okay. Pointing me to the
files/functions would be good enough.  Any explanations are
appreciated.   My purpose is to hack it with different scheduling
policy with real-time and predictability consideration.

- Where/How is the packet scheduler implemented?  How are packets from
multiple queues scheduled?  What about scheduling packets from queues
in different address spaces?

- I noticed the new support of concurrency of multi-processes in the
archive of this mailing list.  Could you point me to the code that
implements this?

- Also another related question -- where/how is the preemption/context
switch between packets/queues implemented?

Thanks in advance!

Best,
Mark

> On 13 Feb 2018, at 2:56 PM, Felix Kuehling <felix.kuehling at amd.com> wrote:
> There is also this: https://gpuopen.com/professional-compute/, which
> give pointer to several libraries and tools that built on top of ROCm.
>
> Another thing to keep in mind is, that ROCm is diverging from the strict
> HSA standard in some important ways. For example the HSA standard
> includes HSAIL as an intermediate representation that gets finalized on
> the target system, whereas ROCm compiles directly to native GPU ISA.
>
> Regards,
>   Felix
>
> On Tue, Feb 13, 2018 at 9:40 AM, Deucher, Alexander <Alexander.Deucher at amd.com> wrote:
> > The ROCm documentation is probably a good place to start:
> >
> > https://rocm.github.io/documentation.html
> >
> >
> > Alex
> >
> > ________________________________
> > From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> on behalf of Ming Yang
> > <minos.future at gmail.com>
> > Sent: Tuesday, February 13, 2018 12:00 AM
> > To: amd-gfx at lists.freedesktop.org
> > Subject: Documentation about AMD's HSA implementation?
> >
> > Hi,
> >
> > I'm interested in HSA and excited when I found AMD's fully open-stack ROCm
> > supporting it. Before digging into the code, I wonder if there's any
> > documentation available about AMD's HSA implementation, either book,
> > whitepaper, paper, or documentation.
> >
> > I did find helpful materials about HSA, including HSA standards on this page
> > (http://www.hsafoundation.com/standards/) and a nice book about HSA
> > (Heterogeneous System Architecture A New Compute Platform Infrastructure).
> > But regarding the documentation about AMD's implementation, I haven't found
> > anything yet.
> >
> > Please let me know if there are ones publicly accessible. If no, any
> > suggestions on learning the implementation of specific system components,
> > e.g., queue scheduling.
> >
> > Best,
> > Mark