https://bugs.freedesktop.org/show_bug.cgi?id=101952
Bug ID: 101952
Summary: OpenCL enqueueReadBuffer returns trash
Product: Mesa
Version: 17.1
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
Severity: major
Priority: medium
Component: Mesa core
Assignee: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
Created attachment 133073
--> https://bugs.freedesktop.org/attachment.cgi?id=133073&action=edit
command log with GDB showing the results of a library switch from amdgpu-pro to
mesa
Hardware:
cpu: 2x Opteron 6276
RAM: 128GB
Video card: on-board matrox G200 and AMD Nano (Fiji)
Software:
Linux: 4.10.17/DRM 3.9.0 (gentoo)
LLVM: 4.0.0
gcc: 7.1.0
mesa: 17.1.5
problem:
when I render a program using the AMD pro libraries, the clEnqueueReadBuffer
command returns the correct output. When I use the mesa libs, the output is
trash. A write to the buffer is performed in both cases. before, the whole
buffer is 0, and after:
AMD: { 0, 0, 0, 255 }
MESA: {4177618488, 4177945519, 16468310, 12159302}
for both cases, the standard amdgpu kernel module was used.
incorrect clReadBuffer results make the system unusable.
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