This strace looks like something we were chasing some time ago but never
could reproduce properly :-/
Are you using the default engine for streaming or the simple engine?
> got more hints :
>
>
> I straced the rygel server process, and found that during the playback
> of the large file(i.e when it becomes not smooth), the process is
> trying to call mutex() a lot, possibly there are some bugs causing
> temporary collission . when I play the small file, such calls do not
> show up
>
>
>
>
> write(3, "\1\0\0\0\0\0\0\0", 8) = 8
> write(3, "\1\0\0\0\0\0\0\0", 8) = 8
> poll([{fd=3, events=POLLIN}, {fd=10, events=POLLIN}, {fd=13,
> events=POLLIN}, {fd=14, events=POLLIN}, {fd=16, events=POLLIN}, {fd=9,
> events=POLLIN|POLLPRI}, {fd=17, events=POLLIN}, {fd=28,
> events=POLLIN}, {fd=27, events=POLLIN}, {fd=19, events=POLLIN},
> {fd=20, events=POLLIN}, {fd=21, events=POLLIN}, {fd=12,
> events=POLLIN}, {fd=15, events=POLLIN}, {fd=31, events=POLLIN},
> {fd=24, events=POLLOUT}, {fd=18, events=POLLIN}, {fd=23,
> events=POLLIN}], 18, 91) = 2 ([{fd=3, revents=POLLIN}, {fd=23,
> revents=POLLIN}])
> read(3, "\2\0\0\0\0\0\0\0", 16) = 8
> write(3, "\1\0\0\0\0\0\0\0", 8) = 8
> write(3, "\1\0\0\0\0\0\0\0", 8) = 8
> poll([{fd=3, events=POLLIN}, {fd=10, events=POLLIN}, {fd=13,
> events=POLLIN}, {fd=14, events=POLLIN}, {fd=16, events=POLLIN}, {fd=9,
> events=POLLIN|POLLPRI}, {fd=17, events=POLLIN}, {fd=28,
> events=POLLIN}, {fd=27, events=POLLIN}, {fd=19, events=POLLIN},
> {fd=20, events=POLLIN}, {fd=21, events=POLLIN}, {fd=12,
> events=POLLIN}, {fd=15, events=POLLIN}, {fd=31, events=POLLIN},
> {fd=24, events=POLLOUT}, {fd=18, events=POLLIN}, {fd=23,
> events=POLLIN}], 18, 91) = 2 ([{fd=3, revents=POLLIN}, {fd=23,
> revents=POLLIN}])
> read(3, "\2\0\0\0\0\0\0\0", 16) = 8
> write(3, "\1\0\0\0\0\0\0\0", 8) = 8
> write(3, "\1\0\0\0\0\0\0\0", 8) = 8
> poll([{fd=3, events=POLLIN}, {fd=10, events=POLLIN}, {fd=13,
> events=POLLIN}, {fd=14, events=POLLIN}, {fd=16, events=POLLIN}, {fd=9,
> events=POLLIN|POLLPRI}, {fd=17, events=POLLIN}, {fd=28,
> events=POLLIN}, {fd=27, events=POLLIN}, {fd=19, events=POLLIN},
> {fd=20, events=POLLIN}, {fd=21, events=POLLIN}, {fd=12,
> events=POLLIN}, {fd=15, events=POLLIN}, {fd=31, events=POLLIN},
> {fd=24, events=POLLOUT}, {fd=18, events=POLLIN}, {fd=23,
> events=POLLIN}], 18, 91) = 2 ([{fd=3, revents=POLLIN}, {fd=23,
> revents=POLLIN}])
> read(3, "\2\0\0\0\0\0\0\0", 16) = 8
> write(3, "\1\0\0\0\0\0\0\0", 8) = 8
> futex(0xdc86ab4, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0xdc86ab0,
> {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1
> futex(0xb55c000, FUTEX_WAKE_PRIVATE, 1) = 1
> futex(0xb55cac4, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0xb55cac0,
> {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1
> futex(0xb4c1a00, FUTEX_WAKE_PRIVATE, 1) = 1
> futex(0xdc86ce0, FUTEX_WAKE_PRIVATE, 1) = 1
> write(3, "\1\0\0\0\0\0\0\0", 8) = 8
> poll([{fd=3, events=POLLIN}, {fd=10, events=POLLIN}, {fd=13,
> events=POLLIN}, {fd=14, events=POLLIN}, {fd=16, events=POLLIN}, {fd=9,
> events=POLLIN|POLLPRI}, {fd=17, events=POLLIN}, {fd=28,
> events=POLLIN}, {fd=27, events=POLLIN}, {fd=19, events=POLLIN},
> {fd=20, events=POLLIN}, {fd=21, events=POLLIN}, {fd=12,
> events=POLLIN}, {fd=15, events=POLLIN}, {fd=31, events=POLLIN},
> {fd=24, events=POLLOUT}, {fd=18, events=POLLIN}, {fd=23,
> events=POLLIN}], 18, 90) = 2 ([{fd=3, revents=POLLIN}, {fd=23,
> revents=POLLIN}])
> read(3, "~\0\0\0\0\0\0\0", 16) = 8
> futex(0x2417da0, FUTEX_WAKE_PRIVATE, 1) = 1
> write(3, "\1\0\0\0\0\0\0\0", 8) = 8
> futex(0x2417da0, FUTEX_WAKE_PRIVATE, 1) = 1
> write(3, "\1\0\0\0\0\0\0\0", 8) = 8
> futex(0x2417da0, FUTEX_WAKE_PRIVATE, 1) = 1
> futex(0x7fbf54000020, FUTEX_WAKE_PRIVATE, 1) = 0
> futex(0x7fbf54000020, FUTEX_WAKE_PRIVATE, 1) = 0
> (END)
>
>
>
> On Sun, Dec 21, 2014 at 2:36 PM, Yang <[email protected]> wrote:
> somehow it seems that the quality of video playback is not
> dependent on bit rate (all my videos are encoded at 2000bits/s
> bit rate ), the smaller files (700MB) play fine, without any
> stops. but when I play the larger files, they constantly go
> into buffering (about every 2 seconds, pausing for about 10
> seconds ).
>
> I cut out the first 10 minutes of my big video (the total
> video is 4.4GB, 100minutes, I cut off the first 10min, about
> 500MB), then play it. it plays very smooth. this has been
> tested and reproduced very consistently.
>
> I checked all the factors: disk is fairly fast,
> writing/reading speed when plugging this usb to a computer, is
> about 35MB/sec , way over the 2000bits/sec bandwidth needed
> for the video. network bandwidth capacity is about 2.5MB/sec,
> I used several client apps, they show the same behavior, so
> it's not that the clients are busy.
>
>
> this looks to be a general problem to many DLNA/uPNP servers ,
> I tried rygel, mediatomb, minidlna, and pogoplug, clients used
> were vlc, bubbleupnp etc.
>
>
>
> so how is this possible? is there a fix? (of course a
> workaround is to cut my files into sections, but that's too
> cumbersome)
>
>
>
>
>
> Thanks
> Yang
>
>
> _______________________________________________
> rygel-list mailing list
> [email protected]
> https://mail.gnome.org/mailman/listinfo/rygel-list
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