Bug 108706 - X slow rendering performance with i915 driver
Summary: X slow rendering performance with i915 driver
Status: RESOLVED MOVED
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/modesetting (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium major
Assignee: Xorg Project Team
QA Contact: Xorg Project Team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-11-10 21:12 UTC by Dzianis Bazhok
Modified: 2018-12-13 18:09 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

Attachments
X process perf flamegraph (301.74 KB, image/svg+xml)
2018-11-10 21:12 UTC, Dzianis Bazhok 		no flags Details
X process perf script (437.42 KB, text/plain)
2018-11-10 21:13 UTC, Dzianis Bazhok 		no flags Details
X process perf data (150.51 KB, application/octet-stream)
2018-11-10 21:13 UTC, Dzianis Bazhok 		no flags Details
Xorg log (626.12 KB, text/x-log)
2018-11-10 21:14 UTC, Dzianis Bazhok 		no flags Details
i915 events perf data file (11.86 MB, application/octet-stream)
2018-11-10 21:15 UTC, Dzianis Bazhok 		no flags Details
i915 events flamegraph (112.45 KB, image/svg+xml)
2018-11-10 21:15 UTC, Dzianis Bazhok 		no flags Details
View All

Description Dzianis Bazhok 2018-11-10 21:12:06 UTC 
Created attachment 142426 [details]
X process perf flamegraph

Hello!

I've noticed that after reboot there is a high cpu usage and slow rendering performance.
Using top I've found that X process uses 10-15% CPU.
intel_gpu_top shows 90-100% GPU usage but on screen nothing happens.
After 10-15 minutes this load may disappear and performance returns to normal.

I'm using Dell XPS 13 with integrated Intel HD Graphics 620.
Software versions:
kernel: 4.19.0-gentoo
xorg-server: 1.20.3
xorg-proto: 2018.4
kde plasma: 5.51.0
kde plasma-desktop: 5.14.3

In attachments I'll provide reports of perf tool for X process and i915 events.
Comment 1 Dzianis Bazhok 2018-11-10 21:13:33 UTC 
Created attachment 142427 [details]
X process perf script
Comment 2 Dzianis Bazhok 2018-11-10 21:13:54 UTC 
Created attachment 142428 [details]
X process perf data
Comment 3 Dzianis Bazhok 2018-11-10 21:14:19 UTC 
Created attachment 142429 [details]
Xorg log
Comment 4 Dzianis Bazhok 2018-11-10 21:15:06 UTC 
Created attachment 142430 [details]
i915 events perf data file
Comment 5 Dzianis Bazhok 2018-11-10 21:15:37 UTC 
Created attachment 142431 [details]
i915 events flamegraph
Comment 6 GitLab Migration User 2018-12-13 18:09:46 UTC 
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/xorg/xserver/issues/29.

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