On 07/01/2015 07:28 AM, He, Junyan wrote:
So far as we know, beignet is thread safe.
Every thead has its own command buffer and do not have
relationship with each others.
Do you use subbuffer to divide the image?
No, as far as I can tell I don't use anything special or advanced.
If you can provide some source code or test case, it may
help a lot.
I'll try to hack together a minimal example over the weekend.
Thanks already for your feedback. Cheers.
-----Original Message-----
From: Song, Ruiling
Sent: Wednesday, July 01, 2015 10:40 AM
To: Gerald Baier; beignet@lists.freedesktop.org
Cc: He, Junyan
Subject: RE: [Beignet] thread safety and OpenMP
-----Original Message-----
From: Beignet [mailto:beignet-boun...@lists.freedesktop.org] On Behalf Of
Gerald Baier
Sent: Sunday, June 28, 2015 9:56 PM
To: beignet@lists.freedesktop.org
Subject: [Beignet] thread safety and OpenMP
I'm using Beignet for image processing, where basically the image is
subdivided into tiles which are then processed by several threads using
OpenMP tasks. I noticed that some of the tiles are occasionally messed up. If
Using OpenMP or OpenCL?
Per OpenCL spec, opencl driver should be thread-safe, and Junyan implemented
the multi-thread support in beignet. That is to say Beignet is thread-safe.
I am not sure whether Junyan has more comments on how to debug the issue. By
the way, if you can provide a test case to reproduce the issue, it would be
much helpful.
Thanks!
Ruiling
I use only one thread everything works fine, also the same program runs as
expected on nvidia GPUs with multiple threads. Hence the question whether
Beignet is thread safe and how I could debug my program?
Here's my configuration:
device name: Intel(R) HD Graphics IvyBridge M GT2 device version: OpenCL
1.2 beignet 1.0.3 (git-9e0ca6f)
Best regards,
Gerald
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