Am 30.09.2012 15:41, schrieb Klaus Schmidinger:
- The new class cIoThrottle is used to allow I/O intense threads to temporarily
suspend their activities in case buffers run full (suggested by Torsten Lang).
Currently the cutter thread is suspended if the TS or Recorder buffer use more
than 50% of their capacity. Plugin authors may want to participate in this
mechanism if they use intense background I/O.
I'd suggest to use this for the low disk space deleted recording cleanup
too. Recently, I've seen an issue like this happen, using VDR-1.7.30,
where my disk was nearly full, and some deleted recordings didn't get
wiped before a new recording. After a while, two HD recordings running
at that time, AssertFreeDiskSpace kicked in and cleaned a deleted
recording to free up disk space, resulting in an buffer overflow for the
recorder:
02:08:31 low disk space while recording, trying to remove a deleted
recording...
02:08:31 removing recording /video/.......del
02:08:31 removing /video/.......del/00001.ts
[...]
02:08:37 removing /video/.......del/00100.ts
02:08:37 removing /video/.......del/resume
02:08:37 removing /video/.......del/marks
02:08:37 removing /video/.......del
02:08:38 max. latency time 7 seconds
02:08:43 buffer usage: 70% (tid=27204)
02:08:43 buffer usage: 80% (tid=27204)
02:08:44 buffer usage: 90% (tid=27204)
02:08:44 buffer usage: 100% (tid=27204)
02:08:44 ERROR: 1 ring buffer overflow (1 bytes dropped)
02:08:44 buffer usage: 70% (tid=27187)
02:08:44 buffer usage: 60% (tid=27187)
02:08:45 ERROR: skipped 187 bytes to sync on start of TS packet
02:08:45 ERROR: skipped 187 bytes to sync on start of TS packet
02:08:45 cNaluDumper: TS continuity offset 6
02:08:45 buffer usage: 0% (tid=27204)
The deleting was surprisingly slow, probably because of the high disk
fill and fragmentation. And for some reason, the overflow happened after
the deleting. Not sure what caused the delay.
Cheers,
Udo
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