Big latency with DDCI

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Yuri
Posts: 46
Joined: Thu Oct 01, 2015 7:26 pm

Big latency with DDCI

Post by Yuri » Sun Feb 10, 2019 1:36 pm

Hi,
I don't know it realeted adapter, driver or minisatip.
I have wintv-usb2ci adapter (not real DDCI :( ). It works mostly fine. But if stream speed bigger than 20 Mbps i have errors:

Code: Select all

[10/02 00:19:50.788 signal]: BW 2056KB/s, Total BW: 28 MB, ns/read 16030, r: 66, w: 1600 fw: 0, tt: 1058 ms
[10/02 00:19:51.812 signal]: BW 1985KB/s, Total BW: 30 MB, ns/read 15542, r: 66, w: 1545 fw: 0, tt: 1025 ms
[10/02 00:19:52.831 signal]: BW 2056KB/s, Total BW: 32 MB, ns/read 15834, r: 67, w: 1599 fw: 0, tt: 1060 ms
[10/02 00:19:53.851 signal]: BW 1984KB/s, Total BW: 34 MB, ns/read 15489, r: 66, w: 1544 fw: 0, tt: 1022 ms
[10/02 00:19:54.876 signal]: BW 2056KB/s, Total BW: 36 MB, ns/read 15847, r: 67, w: 1600 fw: 0, tt: 1061 ms
[10/02 00:19:55.842 AD2]: select_and_execute[7]: EOVERFLOW on socket 9 (sid:2) from 0.0.0.0:0 - type dvr errno 75
[10/02 00:19:55.896 signal]: BW 1947KB/s, Total BW: 38 MB, ns/read 15205, r: 65, w: 1515 fw: 0, tt: 988 ms
[10/02 00:19:56.916 signal]: BW 2046KB/s, Total BW: 40 MB, ns/read 15727, r: 67, w: 1591 fw: 0, tt: 1053 ms
[10/02 00:19:57.941 signal]: BW 1985KB/s, Total BW: 42 MB, ns/read 15536, r: 66, w: 1545 fw: 0, tt: 1025 ms
AD2 - is dvb adapter. Is possible to decrease tt time in my case? Or compute where is bottleneck?

At dvb card with CI interface i have this log and have not problem with stream up to 60 Mbps:

Code: Select all

[10/02 15:52:18.989 signal]: BW 2540KB/s, Total BW: 27621 MB, ns/read 3361, r: 36, w: 363 fw: 0, tt: 121 ms
[10/02 15:52:19.991 signal]: BW 2538KB/s, Total BW: 27624 MB, ns/read 3477, r: 36, w: 362 fw: 0, tt: 125 ms
[10/02 15:52:20.994 signal]: BW 2537KB/s, Total BW: 27626 MB, ns/read 3310, r: 36, w: 359 fw: 0, tt: 119 ms
[10/02 15:52:21.997 signal]: BW 2539KB/s, Total BW: 27629 MB, ns/read 3862, r: 36, w: 364 fw: 0, tt: 139 ms
[10/02 15:52:22.999 signal]: BW 2540KB/s, Total BW: 27631 MB, ns/read 3316, r: 36, w: 363 fw: 0, tt: 119 ms
[10/02 15:52:24.001 signal]: BW 2466KB/s, Total BW: 27634 MB, ns/read 3250, r: 35, w: 351 fw: 0, tt: 113 ms
BR,
Yuri.

cata
Site Admin
Posts: 553
Joined: Tue May 12, 2015 1:01 am

Re: Big latency with DDCI

Post by cata » Mon Feb 11, 2019 7:00 am

Hi,

Would you be able to check if the time is spent here: https://github.com/catalinii/minisatip/ ... dci.c#L691 ?

On my tests on ddci I was not able to see this issue.

9000h
Posts: 51
Joined: Tue May 12, 2015 1:49 pm

Re: Big latency with DDCI

Post by 9000h » Tue Feb 12, 2019 3:34 pm

Hi,

yuri did got in the meantime a fix for the WinTv-CI USB driver :-)

CU
9000h

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