Opened 12 years ago
Closed 12 years ago
Last modified 12 years ago
#5996 closed defect (worksforme)
mythbackend uses 99.9% CPU every 5 Minutes for about 3 Seconds
Reported by: | austin | Owned by: | Isaac Richards |
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Priority: | minor | Milestone: | unknown |
Component: | mythtv | Version: | 0.21-fixes |
Severity: | medium | Keywords: | |
Cc: | Ticket locked: | no |
Description
mythbuntu hardy weekly repository -> version 0.21.20080304-1 18961 (same issue with mythbuntu hardy standard repository)
I have to admit that my CPU has only 1050 MHz, but nevertheless this is strange because I manage to play back videos with an average CPU-Load of 50%. Every 5 Minutes playback stutters (no matter if recording or dvd, no matter if mythfrontend or xbmc) for a few seconds and according to top mythbackend uses 99.9% (more preceisely it seems to be every 05:15 Minutes, the period is always the same). With no playback the CPU usage is there as well. When I check the console or the messages mythbackend outputs absolutely nothing at these moments.
The same hardware was fine under edgy and 0.20.
Change History (5)
comment:1 Changed 12 years ago by
comment:2 Changed 12 years ago by
Status: | new → infoneeded_new |
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Please post logs of: mythbackend -v most and: mythfrontend -v playback,audio
at the time the issue happens.
Do you have any uPnP devices on your network (media players, PS3, ...)?
comment:3 Changed 12 years ago by
Resolution: | → worksforme |
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Status: | infoneeded_new → closed |
comment:4 Changed 12 years ago by
Hi, just food for thought. I had this issue with a new hard drive by Samsung. Check my solution: http://elkin.de/pivot/entry.php?id=108&w=home_of
comment:5 Changed 12 years ago by
Clarification from gbee on IRC:
This is caused by EIT scanning. After collecting EIT data for 5 minutes, the backend will run the scheduler. This is expected behavior. Unfortunately, Myth can interact badly with a system that has high IO latencies - Removing the fsync call from ThreadedFileWriter?.cpp can help work around this issue, in my experience.
btw: "renice"ing and "cpulimit"ing brings no help