Summary: | [APL] UI is very slow | ||||||||||||||
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Product: | DRI | Reporter: | cprigent <christophe.prigent> | ||||||||||||
Component: | DRM/Intel | Assignee: | Imre Deak <imre.deak> | ||||||||||||
Status: | CLOSED NOTOURBUG | QA Contact: | Intel GFX Bugs mailing list <intel-gfx-bugs> | ||||||||||||
Severity: | blocker | ||||||||||||||
Priority: | highest | CC: | elio.martinez.monroy, intel-gfx-bugs | ||||||||||||
Version: | unspecified | ||||||||||||||
Hardware: | x86-64 (AMD64) | ||||||||||||||
OS: | Linux (All) | ||||||||||||||
Whiteboard: | |||||||||||||||
i915 platform: | BXT | i915 features: | display/Other | ||||||||||||
Attachments: |
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Description
cprigent
2016-03-25 18:09:03 UTC
Created attachment 122568 [details]
kern.log when booting
Boot is abnormally long
UI is very slow
Actual result when launching glxgears: http://vanaheimr.tl.intel.com/shared/temp/fdo%2094706.mp4 Created attachment 122603 [details]
top
Created attachment 122604 [details]
dmidecode
Created attachment 122605 [details]
config-4.5.0-nightly+
Reproduced with kernel 4.5.0 f5d413c from nightly: commit f5d413cccefa1f93d64c34f357151d42add63a84 Author: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Date: Thu Mar 24 14:35:16 2016 +0000 drm-intel-nightly: 2016y-03m-24d-14h-34m-29s UTC integration manifest Set priority and severity to maxium *** Bug 93797 has been marked as a duplicate of this bug. *** See bug 93797 for a workaround for this. I don't think this is a graphics issue, but a problem related to system power states, since there is a bad interrupt latency affecting other devices too (keyboard, network). Based on this I'd like someone from the core team to look at this. I confirm it is not reproduced with kernel boot command line: processor.max_cstate=2 This issue has been confirmed to be a problem on early steppings to be fixed in C stepping. There is a workaround patch available and on A stepping at least we can boot limiting CPU c states to work around the problem. As this isn't a graphics related issue and the relevant people are already aware of it, I'm closing this ticket. |
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