[Openmp-dev] Available features of libomptarget nvptx for 7.0 release

[Guray Ozen via Openmp-dev]

Thank you very much for the answer Alexey. I am actually more curious about the runtime. Because, in Nvidia, we have started implementing OpenMP GPU offload on Flang frontend. We are using libomptarget and libomtparget-nvptx. Therefore I was asking which features will runtime support in v7.0.
Also, my additional comments are below.
From: Alexey Bataev <a.bataev at outlook.com>
Sent: Tuesday, July 3, 2018 5:39 PM
To: Hervé Yviquel <herve.yviquel at ic.unicamp.br>; Guray Ozen <gozen at nvidia.com>; openmp-dev at lists.llvm.org
Subject: Re: [Openmp-dev] Available features of libomptarget nvptx for 7.0 release


Hi, are you interested in the status of clang compiler or just library? I can answer for clang and support for offloading to NVidia GPUs.
It supports almost everything from OpenMP 4.5, except for reductions across the teams.

[GURAY:] Is it only in clang ? Do you know does teams reduction works on runtime?

Also, there are still some bugs in the current implementation.
1. Some math functions may cause troubles during the compilation of the device specific code. There is a patch that fixes that problem, but it requires some additional work.
2. Our implementation supports 2 datasharing model for the device code: cuda mode, where all local variables are actually local threadprivate globals (i.e. registers), and generic mode, where the shared variables are placed in the global memory and can be shared between the threads of the parallel regions. Currently, only cuda-mode works correctly, generic mode requires some additional bug fix.
Also, trunk clang compiler does not support static linking.

[GURAY:] Is related to clang-offload-bundler?


Best regards,
Alexey Bataev.

-------------

Best regards,

Alexey Bataev
01.07.2018 5:26, Hervé Yviquel via Openmp-dev пишет:
I agree. Would it be possible to get an update on the status of libomptarget and its codegen? Is it more or less in pair with clang-ykt now?

Thanks,
Hervé

On juin 13 2018, at 6:15 pm, Guray Ozen via Openmp-dev <openmp-dev at lists.llvm.org><mailto:openmp-dev at lists.llvm.org> wrote:

Hi all,



The release date for 7.0 is approaching. I'm curious about the libomptarget and libomptarget-nvptx runtime library. Is there a list of which features are not available in 7.0 and which ones are not?



Best

-guray

This email message is for the sole use of the intended recipient(s) and may contain confidential information.  Any unauthorized review, use, disclosure or distribution is prohibited.  If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message.

_______________________________________________
Openmp-dev mailing list
Openmp-dev at lists.llvm.org<mailto:Openmp-dev at lists.llvm.org>
http://lists.llvm.org/cgi-bin/mailman/listinfo/openmp-dev




_______________________________________________

Openmp-dev mailing list

Openmp-dev at lists.llvm.org<mailto:Openmp-dev at lists.llvm.org>

http://lists.llvm.org/cgi-bin/mailman/listinfo/openmp-dev

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/openmp-dev/attachments/20180703/5b1f1834/attachment.html>