| 2014-08-07 16:51:03 |
Rebecca Palmer |
bug |
|
|
added bug |
| 2014-08-07 16:51:03 |
Rebecca Palmer |
attachment added |
|
pocl_test.py https://bugs.launchpad.net/bugs/1354086/+attachment/4172112/+files/pocl_test.py |
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| 2014-08-07 21:28:40 |
Rebecca Palmer |
description |
pyopencl is partly or wholly unusable on an Intel i5-3230 integrated GPU:
beignet 0.3 (trusty default):
pyopencl.elementwise.ElementwiseKernel draws dotted stripes across the screen, and gives wrong results
pyopencl.clmath segfaults Python
beignet 0.8 (utopic source, recompiled in trusty):
pyopencl.elementwise.ElementwiseKernel works
pyopencl.clmath hangs the entire system (screen frozen, any playing sounds repeating in ~0.5sec loop, requires Alt+SysRq+b reboot; System Monitor shows no abnormal memory usage before the hang, but I don't know if it counts GPU memory)
To reproduce: python pocl_test.py
I'm guessing this is a beignet rather than pyopencl bug, as pyopencl worked on my previous (nvidia) system and a normal application shouldn't be able to hang the whole system.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: beignet (not installed)
ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
Uname: Linux 3.13.0-32-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Aug 7 17:18:35 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-08-01 (6 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64+mac (20140722.2)
SourcePackage: beignet
UpgradeStatus: No upgrade log present (probably fresh install) |
pyopencl is partly or wholly unusable on an Intel i5-3230 integrated GPU:
beignet 0.3 (trusty default):
pyopencl.elementwise.ElementwiseKernel draws dotted stripes across the screen, and gives wrong results
pyopencl.clmath segfaults Python
beignet 0.8 (utopic source, recompiled in trusty) and 0.9 (upstream git head):
pyopencl.elementwise.ElementwiseKernel works
pyopencl.clmath hangs the entire system (screen frozen, any playing sounds repeating in ~0.5sec loop, requires Alt+SysRq+b reboot; System Monitor shows no abnormal memory usage before the hang, but I don't know if it counts GPU memory)
To reproduce: python pocl_test.py
I'm guessing this is a beignet rather than pyopencl bug, as pyopencl worked on my previous (nvidia) system and a normal application shouldn't be able to hang the whole system.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: beignet (not installed)
ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
Uname: Linux 3.13.0-32-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Aug 7 17:18:35 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-08-01 (6 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64+mac (20140722.2)
SourcePackage: beignet
UpgradeStatus: No upgrade log present (probably fresh install) |
|
| 2014-08-08 21:23:43 |
Rebecca Palmer |
bug task added |
|
pyopencl (Ubuntu) |
|
| 2015-01-29 22:03:46 |
Rebecca Palmer |
summary |
[i5-3230] Crash/hang/graphical artifacts in pyopencl |
[i5-3230] Tight pyopencl.clmath loops cause out-of-memory system hang |
|
| 2015-01-29 22:03:46 |
Rebecca Palmer |
description |
pyopencl is partly or wholly unusable on an Intel i5-3230 integrated GPU:
beignet 0.3 (trusty default):
pyopencl.elementwise.ElementwiseKernel draws dotted stripes across the screen, and gives wrong results
pyopencl.clmath segfaults Python
beignet 0.8 (utopic source, recompiled in trusty) and 0.9 (upstream git head):
pyopencl.elementwise.ElementwiseKernel works
pyopencl.clmath hangs the entire system (screen frozen, any playing sounds repeating in ~0.5sec loop, requires Alt+SysRq+b reboot; System Monitor shows no abnormal memory usage before the hang, but I don't know if it counts GPU memory)
To reproduce: python pocl_test.py
I'm guessing this is a beignet rather than pyopencl bug, as pyopencl worked on my previous (nvidia) system and a normal application shouldn't be able to hang the whole system.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: beignet (not installed)
ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
Uname: Linux 3.13.0-32-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Aug 7 17:18:35 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-08-01 (6 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64+mac (20140722.2)
SourcePackage: beignet
UpgradeStatus: No upgrade log present (probably fresh install) |
In beignet (not pocl), tight loops involving OpenCL array creation and destruction, eg. repeated bCL=aCL+bCL (or other pyopencl.clmath operations) or repeated pyopencl.enqueue_copy(cq0,bCL.data,aCL.data), often hang the whole system, after a number of operations consistent with memory exhaustion.
As waiting for queued operations to finish (pyopencl.enqueue_barrier(cq0).wait()) before attempting more avoids the bug, but dependencies between the operations (as in the bCL=aCL+bCL example) do not, this is probably a result of the "allocate memory" step being separate from, and faster than, the "do the operation" step, so being able to run ahead until it uses up all the memory.
(Note that while the above wait() can be used as a workaround for this bug, it is usually faster to avoid frequent memory allocation altogether, by reusing existing arrays; for pyopencl.clmath, this means using pyopencl.tools.MemoryPool.) |
|
| 2015-01-29 22:04:11 |
Rebecca Palmer |
attachment added |
|
arraybug_test.py https://bugs.launchpad.net/ubuntu/+source/beignet/+bug/1354086/+attachment/4308304/+files/arraybug_test.py |
|
| 2018-07-16 21:37:10 |
Rebecca Palmer |
bug task added |
|
mesa (Ubuntu) |
|
| 2018-07-16 21:37:31 |
Rebecca Palmer |
pyopencl (Ubuntu): status |
New |
Invalid |
|
| 2018-07-16 21:38:05 |
Rebecca Palmer |
attachment added |
|
eventchain-memory-leak.patch https://bugs.launchpad.net/ubuntu/+source/pyopencl/+bug/1354086/+attachment/5164304/+files/eventchain-memory-leak.patch |
|
| 2018-07-16 21:41:07 |
Rebecca Palmer |
beignet (Ubuntu): status |
New |
In Progress |
|
| 2018-07-17 00:22:40 |
Ubuntu Foundations Team Bug Bot |
tags |
amd64 apport-bug trusty |
amd64 apport-bug patch trusty |
|
| 2018-07-17 00:22:48 |
Ubuntu Foundations Team Bug Bot |
bug |
|
|
added subscriber Ubuntu Review Team |
| 2018-07-27 00:33:41 |
Launchpad Janitor |
beignet (Ubuntu): status |
In Progress |
Fix Released |
|
| 2023-08-21 17:32:01 |
Oibaf |
mesa (Ubuntu): status |
New |
Invalid |
|
