[vdr] High CPU usage of VDR 1.1.11

[Oliver Endriss <o.endriss@gmx.de>]

Hi,

I just tested VDR 1.1.11 on a Pentium I 233 MMX. 
This is a slow machine, but there have never been any problems.
(With VDR 1.0.4 peak CPU usage is about 25% during recording.)

With VDR 1.1.11 and NEWSTRUCT driver, it is impossible to create a good recording.
CPU usage is at 100% and there are lots of error messages in the syslog:

|Sep 29 20:45:05 orion vdr[11927]: timer 1 start
|Sep 29 20:45:16 orion vdr[11927]: record /video/@RTL__/2002-09-29.20:45.50.99.rec
|Sep 29 20:45:18 orion kernel: buffer empty
|Sep 29 20:45:25 orion last message repeated 4 times
|Sep 29 20:45:26 orion vdr[11940]: ERROR: ring buffer overflow (61 bytes dropped)
|Sep 29 20:45:26 orion vdr[11940]: ERROR: ring buffer overflow (188 bytes dropped)
|Sep 29 20:45:29 orion last message repeated 902 times
|Sep 29 20:45:29 orion vdr[11939]: ERROR: skipped 127 byte to sync on TS packet
|Sep 29 20:45:29 orion vdr[11940]: ERROR: ring buffer overflow (188 bytes dropped)
|Sep 29 20:45:29 orion vdr[11940]: ERROR: ring buffer overflow (61 bytes dropped)
|Sep 29 20:45:29 orion vdr[11940]: ERROR: ring buffer overflow (188 bytes dropped)
|Sep 29 20:45:32 orion last message repeated 727 times
|...
|Sep 29 20:45:47 orion vdr[11940]: ERROR: ring buffer overflow (188 bytes dropped)
|Sep 29 20:45:50 orion last message repeated 670 times
|Sep 29 20:45:50 orion vdr[11939]: ERROR: skipped 127 byte to sync on TS packet
|Sep 29 20:45:50 orion vdr[11940]: ERROR: ring buffer overflow (188 bytes dropped)
|...

When I stop recording CPU usage is still at 100%, until I switch channels.
Then it drops to normal (< 5%).

I get similar results with the old driver + time-shifting firmware.
After I disabled "#define DVB_DRIVER_VERSION 2002090101 //XXX+" VDR seems to 
work normal no watter which driver/firmware is being used.

Before I start some debug sessions:
Is it normal that the new code needs so much horse power?

Oliver



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