From: Benjamin Federau <benjamin.federau@basyskom.com>
To: intel-gfx@lists.freedesktop.org
Subject: QtQuick/Qt5 application produces high CPU load with Intel i915
Date: Thu, 9 Nov 2017 16:54:54 +0100 [thread overview]
Message-ID: <2709130486-2719@mx1.basyskom.com> (raw)
[-- Attachment #1.1: Type: text/plain, Size: 1330 bytes --]
Hello,
I'm running a QtQuick application using shaders on an older Intel(R) Atom(TM) CPU N270 @ 1.60GHz with Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller.
My setup is
* Ubuntu 16.04 (32-bit)
* Qt 5.9.2
* Mesa: 17.4.0
* Intel i8xx, i9xx display driver: 2.99.917
* XServer: 1.18.4
The test application is the QtQuick samegame example. When I start the app with the INTEL_DEBUG=perf env variable i get the following messages
....
ENTER FALLBACK 10000: Program
LEAVE FALLBACK Program
i915_program_error: Exceeded max nr indirect texture lookups (6 out of 4)
...
and the CPU load goes up to 100% and the app reacts very slow. Btw. is there another debugging/tracing configuration which i can use to narrow down the problem a bit more?
With the perf or oprofile tool I see that the most CPU time is consumed by i915_dri.so.
Are there any known regressions regarding QtQuick/Qt 5/Shaders and the i915 driver on Ubuntu 16.04.
Regards
-
Benjamin Federau
--
M.Sc. Benjamin Federau
Integration Engineer
basysKom GmbH
Robert-Bosch-Str. 7 | 64293 Darmstadt | Germany
benjamin.federau@basyskom.com | www.basyskom.com
Handelsregister: Darmstadt HRB 9352
Geschaeftsfuehrung: Dr.-Ing. Eva Brucherseifer, Heike Ziegler
[-- Attachment #1.2: Type: text/html, Size: 1833 bytes --]
[-- Attachment #2: Type: text/plain, Size: 160 bytes --]
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
next reply other threads:[~2017-11-09 15:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-09 15:54 Benjamin Federau [this message]
-- strict thread matches above, loose matches on Subject: below --
2017-11-09 12:57 QtQuick/Qt5 application produces high CPU load with Intel i915 Benjamin Federau
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=2709130486-2719@mx1.basyskom.com \
--to=benjamin.federau@basyskom.com \
--cc=intel-gfx@lists.freedesktop.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox