This has been fixed
** Changed in: linux (Ubuntu)
Status: Confirmed => Fix Released
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https://bugs.launchpad.net/bugs/1800752
Title:
[regression] Wrong EU count
Good.
I've tested that patch in 4.18.0 and can confirm it works.
https://bugs.freedesktop.org/show_bug.cgi?id=108712#c14
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Title:
Yes. The patch will land Cosmic and Disco.
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Title:
[regression] Wrong EU count for i5-5250U, reducing OpenCL performance
Status in
They've found the bug!!
https://bugs.freedesktop.org/attachment.cgi?id=142443
Is there a mechanism for getting this patched into the current Cosmic
kernels (and, presumably, Disco)?
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I've opened:
https://bugs.freedesktop.org/show_bug.cgi?id=108712
** Bug watch added: freedesktop.org Bugzilla #108712
https://bugs.freedesktop.org/show_bug.cgi?id=108712
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Thanks.
I'll add relevant links (both ways) if I can as I report it on that site.
If the code hasn't changed in the graphics development branch I may submit a
report now anyway...
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Additional information (note in particular that Intel consider the
graphics development branch at https://cgit.freedesktop.org/drm-tip, not
the integration branch at kernel.org, to be the appropriate "latest
upstream" to test against):
https://01.org/linuxgraphics/documentation/how-report-bugs
Or I could post a comment to the commit mentioned in #14 - see what the
author (from Intel) thinks?
Not sure how much printk()s would tell me - the debugfs already shows it
ends up with only 4 EUs pre sub-slice instead of 8. I'll give it a go,
though. But I (might) need signed kernels...I assume
('invalid' = 'not beignet's bug' - I do agree it is *a* bug)
The kernel code that reads these numbers from the device
(https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/gpu/drm/i915/intel_device_info.c#n434)
does explicitly support the 47 EU case (any one of the 48
I've been looking (briefly) for some docs on the Intel GPU hardware
layout.
Came across this:
https://01.org/linuxgraphics/documentation/hardware-specification-prms
leading to:
https://01.org/sites/default/files/documentation/intel-gfx-prm-osrc-bdw-vol04-configurations_3.pdf
which says that a
apport information
** Tags added: apport-collected
** Description changed:
I run a BOINC project which uses opencl_intel on my Kubunut system
On bioinc the tasks ran in 12,000 +/- 200 seconds.
They've been doing that for ~6 months.
I've now updated the system to cosmic, and the
Only affect Cosmic. Bionic is OK.
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Title:
[regression] Wrong EU count for i5-5250U, reducing OpenCL performance
Status in beignet
OK. So I have to run as root *while logged in to desktop of the system*.
Just being logged in as root (on a system where I "never" user the
console...) over the network isn't good enough.
Now done. It claims to have submitted data. I'll change the state to
Confirmed.
** Changed in: linux
>> I've installed it - it might now be collecting data...
No, it's not. It fired up the OAuth authorization page, which I
authorized (and got the mail confirmation). Now it just sits there
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>> Further information may be available in the files (readable only by root,
>> the 0 may be different if you have more than one graphics device):
Info attached (only 0 has those files) for both Cosmic
(4.18.0-10-generic) and Bionic (4.15.0-38-generic) kernels. (The change
mentioned in #14 seems
Here's the Bionic kernel info (couldn't seem to be able to attach two
files to one comment?).
** Attachment added: "4.15.0-38-generic (Bionic) dri info"
https://bugs.launchpad.net/ubuntu/+source/beignet/+bug/1800752/+attachment/5209781/+files/dri-info.4.15.0-38-generic.log
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produced:
>> ERROR: The python3-launchpadlib package is not installed. This functionality
>> is not available.
which might explain why the info wasn't there...
I've installed it - it might now be collecting data...
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Further information may be available in the files (readable only by
root, the 0 may be different if you have more than one graphics device):
/sys/kernel/debug/dri/0/i915_capabilities
/sys/kernel/debug/dri/0/i915_sseu_status
** Summary changed:
- Performance degraded in Cosmic
+ [regression]
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