[llvm-dev] Can I control HSA config generated by AMDGPU backend?

[Changdao Dong via llvm-dev]

Matt,

Attached are the two assembly code for kernel "search2", one is from amdgpu
pro online compiler, one is from llvm-roc-1.6.x. It will be great if you
can take a look and see how to improve the llvm one.
In case you missed:
The target algorithm is lyra2 and the target kernel is "search2" in
https://github.com/fancyIX/sgminer-phi2-branch/blob/master/kernel/phi2.cl.
The detail is implemented in
https://github.com/fancyIX/sgminer-phi2-branch/blob/master/kernel/lyra2mdz.cl

Thanks,
   Changdao

On Wed, Sep 5, 2018 at 12:26 PM Changdao Dong <dongchangdao at gmail.com>
wrote:

> The target algorithm is lyra2 and the target kernel is "search2" in
> https://github.com/fancyIX/sgminer-phi2-branch/blob/master/kernel/phi2.cl.
> The detail is implemented in
> https://github.com/fancyIX/sgminer-phi2-branch/blob/master/kernel/lyra2mdz.cl
> If you have time to take a look at the assembly, I can upload them later
> today.
>
> Thanks,
>     Changdao
>
> On Wed, Sep 5, 2018 at 11:32 AM Matt Arsenault <arsenm2 at gmail.com> wrote:
>
>>
>>
>> On Sep 5, 2018, at 23:17, Changdao Dong via llvm-dev <
>> llvm-dev at lists.llvm.org> wrote:
>>
>>
>> Finally I kind of modified llvm to generate assembly that can run on
>> AMDGPU pro drivers. One problem is the performance of the code generated by
>> llvm is about 10% slower than amdgpu's online compiler. Anything I can tune
>> the performance up the performance of llvm?\
>>
>> This is very dependent on the case you are looking at, so without a
>> specific example or ISA comparison between the compilers there’s no guessing
>>
>> -Matt
>>
>
>
> --
> DONG, Changdao
>
> MP: 1-412-551-2330
> dongchangdao at gmail.com <cddong at cmu.edu>
>


-- 
DONG, Changdao

MP: 1-412-551-2330
dongchangdao at gmail.com <cddong at cmu.edu>
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