Bug 1433632 - clpeak hangs trying to access AMD GPU using mesa-libOpenCL
Summary: clpeak hangs trying to access AMD GPU using mesa-libOpenCL
Alias: None
Product: Fedora
Classification: Fedora
Component: clpeak
Version: 25
Hardware: x86_64
OS: Linux
Target Milestone: ---
Assignee: Fabian Deutsch
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2017-03-19 00:00 UTC by M. Edward (Ed) Borasky
Modified: 2017-12-12 10:42 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2017-12-12 10:42:01 UTC
Type: Bug

Attachments (Terms of Use)
clinfo for the system (12.47 KB, text/plain)
2017-03-19 00:00 UTC, M. Edward (Ed) Borasky
no flags Details
log of successful clpeak run on platform 1 (pocl - uses CPU, not GPU) (801 bytes, text/plain)
2017-03-19 00:03 UTC, M. Edward (Ed) Borasky
no flags Details

Description M. Edward (Ed) Borasky 2017-03-19 00:00:33 UTC
Created attachment 1264468 [details]
clinfo for the system

Description of problem: clpeak hangs with 100% CPU trying to access "Clover" GPU

Version-Release number of selected component (if applicable):
Name        : clpeak
Arch        : x86_64
Epoch       : 0
Version     : 0.1
Release     : 11.20160207git1f90347.fc24
Size        : 135 k
Repo        : @System
From repo   : fedora

Name        : mesa-libOpenCL
Arch        : x86_64
Epoch       : 0
Version     : 13.0.4
Release     : 2.fc25
Size        : 1.9 M
Repo        : @System
From repo   : updates

How reproducible: always happens

Steps to Reproduce:
1. Install 'clinfo', 'clpeak', 'pocl' and 'mesa-libOpenCL'
2. Run clinfo. On my system, it shows the GPU and "pocl", which uses the CPU. Output file is attached.
3. On my system 'pocl' is platform 1 and 'Clover' (the GPU) is platform 0. clpeak runs fine on platform 1 (log attached) but on platform 0 it starts up and then sits there at 100% CPU. So on my system 'clpeak -p 1' works and 'clpeak -p 0' fails. 

Actual results:
$ clpeak -p 0

Platform: Clover
  Device: AMD BONAIRE (DRM 2.48.0 / 4.9.14-200.fc25.x86_64, LLVM 3.9.1)
    Driver version  : 13.0.4 (Linux x64)
    Compute units   : 14
    Clock frequency : 1075 MHz

followed by nothing happening

Expected results: a full run of clpeak against the AMD Bonaire GPU

Additional info: I don't think this is a clpeak problem but I couldn't find mesa-libOpenCL in the bug report interface.

Comment 1 M. Edward (Ed) Borasky 2017-03-19 00:03:00 UTC
Created attachment 1264469 [details]
log of successful clpeak run on platform 1 (pocl - uses CPU, not GPU)

Comment 2 M. Edward (Ed) Borasky 2017-04-25 08:12:59 UTC
I've got some free time this week - is there a how-to on tracing OpenCL / AMD GPU bugs like this with GDB?

Comment 3 M. Edward (Ed) Borasky 2017-04-25 22:23:53 UTC
I'm moving ahead with the GDB stuff ... in the process I've run into a gdb bug, which I'll search for. I'm also going to dual-boot the machine with Fedora 26 and see if this is still there; not much point in troubleshooting it on 25 when 26 is in alpha. ;-)

Comment 4 M. Edward (Ed) Borasky 2017-04-26 06:55:24 UTC
gdb issue is  bug 1367131

Comment 5 M. Edward (Ed) Borasky 2017-04-27 22:29:37 UTC
This upstream bug looks like the same issue: https://bugs.freedesktop.org/show_bug.cgi?id=96897

Comment 6 M. Edward (Ed) Borasky 2017-05-08 06:02:02 UTC
Also on GitHub: https://github.com/krrishnarraj/clpeak/issues/32

Comment 7 Fedora End Of Life 2017-11-16 18:58:26 UTC
This message is a reminder that Fedora 25 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
and issuing updates for Fedora 25. It is Fedora's policy to close all
bug reports from releases that are no longer maintained. At that time
this bug will be closed as EOL if it remains open with a Fedora  'version'
of '25'.

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Comment 8 Fedora End Of Life 2017-12-12 10:42:01 UTC
Fedora 25 changed to end-of-life (EOL) status on 2017-12-12. Fedora 25 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

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