Tvheadend

Presumably these are USB devices if you are using with a QNAP. I would recommend that you edit the adapter configuration to disable full mux rx (this will eventually be the default for all USB devices, but not got around to changing it).

This might help reduce CPU loading.

Adam

i disable "Disable full MUX reception" ... first test show better cpu load. now i have 70% for two streams ... nice!

I'm confused? you say better CPU load and then 70% for 2 streams? Is that last statement being ironic?

70% load for 2 streams is pretty high, though I guess it depends on what processor model you have in your QNAP and what streams those are.

Adam

Ok, i will try to explain my problem better (sorry for my bad english)

the problem still exist.

The qnap use a Marvell 2.0 GHz CPU. Model Typ: TS-219P II

CPU load for one stream (HD 1080) with CWC

 PID USER     STATUS   RSS  PPID %CPU %MEM COMMAND
30941 admin    S        70M     1 34.1 14.0 ld-linux.so.3
11293 admin    R        960 11265  0.5  0.1 top

CPU load for two streams (HD 1080) with CWC

  PID USER     STATUS   RSS  PPID %CPU %MEM COMMAND
30941 admin    S        74M     1 94.7 14.7 ld-linux.so.3
11293 admin    R       1032 11265  0.7  0.2 top

CPU load for two streams (HD 1080) without CWC

 PID USER     STATUS   RSS  PPID %CPU %MEM COMMAND
30941 admin    S        74M     1  1.9 14.7 ld-linux.so.3
 5833 admin    S        14M     1  0.9  2.9 mediasrv

here my config off both dvb-s2 usb sticks:

i think the problem is on CWC!

Please can you report this as a bug. I would have to agree that it does look like its CWC related.

Adam