Hi Antti, On Wed, Mar 25, 2009 at 10:48:01PM +0200, Antti Palosaari wrote: > Antti Palosaari wrote: >> Heinrich Langos wrote: >>> Moikka Antti, >>> >>>> vp7045 does not have PID-filters. >>>> I think difference comes from different USB-transfer settings. >>>> vp7045 uses BULK packet size 4096 and af9015 uses BULK packet size >>>> 512 for USB2.0 and BULK packet size 64 for USB1.1. Therefore >>>> af9015 sends 8 times more packets than vp7045 (I guess). >>>> >>>> One thing more you can test - use USB1.1. To force USB1.1 remove >>>> USB2.0 driver by rmmod ehci_hcd. After that plug af9015 stick and >>>> look from logs it detects USB1.1 and uses PID-filters. af9015 >>>> driver now uses smaller packet size for transfer that can change >>>> load (bigger?). >> >>> seems you are right. The transfer with PID filter in usb 1.1 causes >>> about 30% load in contrast to 19% with usb 2.0 >>> >>> is there a way to increase the packet size for those bulk transfers? >>> for usb 2.0? for 1.1? >> >> Actually AF9015 chip offers registers to configure packet size. But >> those which are now used are default ones and rather many devices >> (other than af9015) are using just same. That's why I am not sure if I >> want change those to bigger ones. >> >> I will make test version that uses 4k packets for your tests. If it >> resolves problem then we should consider for example adding module >> param for setting desirable packet size. I will inform you when test >> version is ready - It takes day or two. > > Unfortunately 512 seems to be biggest allowed packet size so I cannot > increase it. Anyhow, there is other configurable parameter called packet > count. I increased that from 348 to 512 but I doubt it does not have any > effect. Feel free to test. If it does not change load then I think we > cannot do more. > Test tree: > http://linuxtv.org/hg/~anttip/af9015_powertop/ Thank you very much for your work and helpful information. Sorry it took me some time to fire up that stick again.. here's the result: In short the improvements (if any) are within the error margin. The snapshots below seem to indicate that load with pid filter is reduced somewhat, but i assure you that you get loads from 1.4-1.0 and 22-16% respectivly. So there seems no gain in changing the packet count constant. As usual I have included the details below. BTW: I got myself a "Toshiba USB DVB-T Tuner PX1211E-1TVD" based on the DiB3000M-C/P. Unlike the siemens stick it has a pid filter. I only tested it without the pid filter yet, and it seems to perform as good as the siemens stick in terms of system load. So I guess it uses big packets for the bulk transfers. I hope I'll have some time to test it further this weekend. Hopefully it turns out to reduce the system load by the driver to a reasonable level. If so I will finally get around to look into vdr itself as a cause of wasted CPU cycles and energy... :-) cheers -henrik Details: # modprobe -v dvb_usb_af9015 insmod /lib/modules/2.6.26-1-686/kernel/drivers/media/dvb/dvb-core/dvb-core.ko insmod /lib/modules/2.6.26-1-686/kernel/drivers/media/dvb/dvb-usb/dvb-usb.ko disable_rc_polling=1 insmod /lib/modules/2.6.26-1-686/kernel/drivers/media/dvb/dvb-usb/dvb-usb-af9015.ko # dmesg | tail [421479.228321] af9015: recv bulk message failed:-110 [421481.228225] af9015: recv bulk message failed:-110 [421481.236400] dvb-usb: found a 'Afatech AF9015 DVB-T USB2.0 stick' in warm state. [421481.236940] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer. [421481.237973] DVB: registering new adapter (Afatech AF9015 DVB-T USB2.0 stick) [421481.714270] af9013: firmware version:4.95.0 [421481.724131] DVB: registering adapter 0 frontend 0 (Afatech AF9013 DVB-T)... [421481.724847] tda18271 0-00c0: creating new instance [421481.729438] TDA18271HD/C2 detected @ 0-00c0 [421481.994205] dvb-usb: Afatech AF9015 DVB-T USB2.0 stick successfully initialized and connected. [421482.012365] usbcore: registered new interface driver dvb_usb_af9015 [421992.345780] tda18271: performing RF tracking filter calibration [421997.798964] tda18271: RF tracking filter calibration complete ====================== no pid filter ========================= zap: | PowerTOP version 1.10 (C) 2007 Intel Corporation | | Cn Avg residency P-states (frequencies) | C0 (cpu running) (30.8%) 750 Mhz 0.0% | polling 0.2ms ( 0.0%) 563 Mhz 0.0% | C1 halt 0.0ms ( 0.0%) 375 Mhz 0.0% | C2 0.4ms ( 7.3%) 188 Mhz 100.0% | C3 0.2ms (61.9%) | | Wakeups-from-idle per second : 3100.6 interval: 10.0s | no ACPI power usage estimate available | | Top causes for wakeups: | 60.5% (4774.2) USB device 5-1 : DVB-T 2 (Afatech) | 39.3% (3107.5) <interrupt> : uhci_hcd:usb1, HDA Intel, ehci_hcd:usb5 | 0.1% ( 5.7) zap : schedule_timeout (process_timeout) | 0.0% ( 2.0) xfsaild : schedule_timeout (process_timeout) | 0.0% ( 1.6) xfsbufd : schedule_timeout (process_timeout) | 0.0% ( 1.2) syslogd : ehci_irq (ehci_watchdog) | 0.0% ( 1.0) zap : do_nanosleep (hrtimer_wakeup) | 0.0% ( 1.0) ifconfig : b44_open (b44_timer) vdr: | PowerTOP version 1.10 (C) 2007 Intel Corporation | | Cn Avg residency P-states (frequencies) | C0 (cpu running) (34.6%) 750 Mhz 0.0% | polling 0.0ms ( 0.0%) 563 Mhz 0.0% | C1 halt 0.0ms ( 0.0%) 375 Mhz 0.0% | C2 0.1ms ( 0.5%) 188 Mhz 100.0% | C3 0.3ms (64.9%) | | Wakeups-from-idle per second : 2588.7 interval: 10.0s | no ACPI power usage estimate available | | Top causes for wakeups: | 59.3% (4318.9) USB device 5-1 : DVB-T 2 (Afatech) | 37.5% (2730.5) <interrupt> : uhci_hcd:usb1, HDA Intel, ehci_hcd:usb5 | 3.0% (220.9) vdr : futex_wait (hrtimer_wakeup) | 0.1% ( 6.2) vdr : schedule_timeout (process_timeout) | 0.0% ( 2.0) xfsaild : schedule_timeout (process_timeout) | 0.0% ( 1.6) xfsbufd : schedule_timeout (process_timeout) | 0.0% ( 1.3) syslogd : ehci_irq (ehci_watchdog) | 0.0% ( 1.1) vdr : hrtick_set (hrtick) | 0.0% ( 1.0) vdr : do_nanosleep (hrtimer_wakeup) | 0.0% ( 1.0) ifconfig : b44_open (b44_timer) ====================== with hw pid filter ========================= # modprobe -v dvb-usb force_pid_filter_usage=1 insmod /lib/modules/2.6.26-1-686/kernel/drivers/media/dvb/dvb-core/dvb-core.ko insmod /lib/modules/2.6.26-1-686/kernel/drivers/media/dvb/dvb-usb/dvb-usb.ko force_pid_filter_usage=1 disable_rc_polling=1 # modprobe -v dvb_usb_af9015 insmod /lib/modules/2.6.26-1-686/kernel/drivers/media/dvb/dvb-usb/dvb-usb-af9015.ko zap: | PowerTOP version 1.10 (C) 2007 Intel Corporation | | Cn Avg residency P-states (frequencies) | C0 (cpu running) ( 1.1%) 750 Mhz 0.0% | polling 0.0ms ( 0.0%) 563 Mhz 0.0% | C1 halt 0.0ms ( 0.0%) 375 Mhz 0.0% | C2 0.0ms ( 0.0%) 188 Mhz 100.0% | C3 10.6ms (98.9%) | | Wakeups-from-idle per second : 95.7 interval: 15.0s | no ACPI power usage estimate available | | Top causes for wakeups: | 48.8% ( 70.1) <interrupt> : uhci_hcd:usb1, HDA Intel, ehci_hcd:usb5 | 33.2% ( 47.7) USB device 5-1 : DVB-T 2 (Afatech) | 7.0% ( 10.1) syslogd : ehci_irq (ehci_watchdog) | 4.7% ( 6.8) zap : schedule_timeout (process_timeout) | 1.4% ( 2.0) xfsaild : schedule_timeout (process_timeout) | 1.2% ( 1.7) xfsbufd : schedule_timeout (process_timeout) | 0.7% ( 1.1) kdvb-ad-0-fe-0 : schedule_timeout (process_timeout) | 0.7% ( 1.0) ifconfig : b44_open (b44_timer) | 0.7% ( 1.0) zap : do_nanosleep (hrtimer_wakeup) vdr: | PowerTOP version 1.10 (C) 2007 Intel Corporation | | Cn Avg residency P-states (frequencies) | C0 (cpu running) (16.8%) 750 Mhz 0.0% | polling 0.1ms ( 0.0%) 563 Mhz 0.0% | C1 halt 0.0ms ( 0.0%) 375 Mhz 0.0% | C2 0.1ms ( 0.3%) 188 Mhz 100.0% | C3 0.9ms (82.9%) | | Wakeups-from-idle per second : 938.4 interval: 10.0s | no ACPI power usage estimate available | | Top causes for wakeups: | 48.6% (988.7) USB device 5-1 : DVB-T 2 (Afatech) | 39.5% (804.2) <interrupt> : uhci_hcd:usb1, HDA Intel, ehci_hcd:usb5 | 10.9% (221.1) vdr : futex_wait (hrtimer_wakeup) | 0.3% ( 6.9) syslogd : ehci_irq (ehci_watchdog) | 0.3% ( 6.0) vdr : schedule_timeout (process_timeout) | 0.1% ( 2.0) xfsaild : schedule_timeout (process_timeout) | 0.1% ( 1.6) xfsbufd : schedule_timeout (process_timeout) | 0.0% ( 1.0) ifconfig : b44_open (b44_timer) | 0.0% ( 1.0) vdr : do_nanosleep (hrtimer_wakeup) _______________________________________________ vdr mailing list vdr@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
