Opened 16 years ago
Closed 16 years ago
#5410 closed defect (fixed)
memory leak in myth-backend on x64 when recording from DVB-C / qam256
| Reported by: | anonymous | Owned by: | stuartm |
|---|---|---|---|
| Priority: | minor | Milestone: | unknown |
| Component: | mythtv | Version: | unknown |
| Severity: | medium | Keywords: | |
| Cc: | Ticket locked: | no |
Description
Bug forwarded from the Mythbuntu bug tracker:
When recording from a "Satelco EasyWatch? DVB-C MK3" DVB-C card I see a memory leak in mythtv-backend. The system seems to allocate about 0.2% of the 4Gb ram installed in the backend every minute until the memory usage rises to about 80% then the system starts swapping and becomes totally unusable. When the recording is finished the memory is not released. The only way to release the memory is to stop/start the mythtv-backend process.
kernel 2.6.24-16-generic #1 SMP Thu Apr 10 12:47:45 UTC 2008 x86_64 GNU/Linux.
My cable provider sends DVB-C in QAM256.
The problem could be related to EIT and the option "Close DVB card when not it use".
mythbackend version: 0.21.20080304-1
I've run the backend under valgrind and have attached the log file.
Valgrind started with the following options:- valgrind --leak-check=full --error-limit=no --show-reachable=yes --log-file=logfile -v -- /usr/bin/mythbackend --daemon --logfile /var/log/mythtv/mythbackend.log --pidfile /var/run/mythtv/mythbackend.pid --noupnp | tee backend.log
Regards Ian Dobson
The OP also suggests:
I've done abit more testing and the leak only happens on some channels. At the moment I can say that the leak happens on channel ProSieben? (Pro7). Note I can watch the programms recorded from ProSieben? without any problems.
After abit of googling I've come across several comments about "encoding fixups for German networks"
Logs attached.
Attachments (2)
Change History (8)
Changed 16 years ago by
| Attachment: | mythbackend.txt.gz added |
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Changed 16 years ago by
| Attachment: | valgrind.txt.gz added |
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comment:1 Changed 16 years ago by
comment:2 Changed 16 years ago by
Upgraded mythtv-backend to 0.21.0+fixes17453, kernel to 2.6.24-18-generic leak still happening.
comment:3 Changed 16 years ago by
Upgraded mythtv-backend to 0.21.0+fixes17490, tested with a "KNC One TV-Station " card and still seeing the leak.
comment:4 Changed 16 years ago by
Ian Dobson claims this issue has been fixed by a recent update to the release-0-21-fixes branch.
comment:5 Changed 16 years ago by
| Owner: | changed from Isaac Richards to stuartm |
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| Status: | new → accepted |
I'll double check the valgrind log first before closing, I'm not sure what backported fixes would fixed this issue.
comment:6 Changed 16 years ago by
| Resolution: | → fixed |
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| Status: | accepted → closed |
Feel free to take a look at the original ticket for uncompressed log files and a memory usage graph: https://bugs.launchpad.net/ubuntu/+source/mythtv/+bug/237137