esif_ufd using unexpectedly high amount of CPU |
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Issue descriptionUnder heavy load (lots of open CNN tabs, switching through all tabs with control-Tab), the "top" command shows that esif_ufd uses between 10% and 20% of a CPU. This is on a cyan running a very recent ToT. It seems a little high to me. I wonder if our CWP team has any data on this.
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Mar 17 2017
We were trying to reproduce this issue but it was only reproduced once in a lab environment and unfortunately I was not there to see it. We could not reproduce the issue ever since even with 24 tabs running CNN. Please provide more information how to reproduce this issue consistently, specifically, was it reproducible with WiFi or LAN connections, were web videos running, was esif_ufd running at high utilization persistently or just briefly, etc. Basically we want to find out when this happen, if system is severely throttled by DPTF (esif_ufd).
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Mar 24 2017
Luigi can you clarify repro steps.
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May 19 2017
Hi. Sorry, I don't have good repro steps. Also please see this internal bug: https://b.corp.google.com/issues/38325312 already copied to Intel.
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Jul 26 2017
The b/ bug is marked fixed. |
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Comment 1 by snanda@chromium.org
, Mar 17 2017