[vdr] [PATCH] UnbufferedFile improvements v7
Klaus.Schmidinger at cadsoft.de
Sat Feb 4 15:28:24 CET 2006
Klaus Schmidinger wrote:
> Artur Skawina wrote:
>> this time with a new approach to read caching. Should make watching
>> and editing recordings on a non-idle (and/or slow) machine more
>> The difference to previous versions (and stock fadvise-enabled vdr) is
>> that previously, read data was almost immediately forgotten after it
>> was used; now a certain amount of recently accessed data (at most
>> ~16M) is kept around. This means that short seeks (jumps) when
>> replaying do not cause disk accesses. Things like switching play mode,
>> FF, setting and moving editing marks shouldn't usually block waiting
>> for disk IO. The changes are most noticeable when eg. several
>> recordings are happening in the background.
>> I did very little testing, treat this as beta quality at best. Seems
>> to work ok, but i won't probably have time to test it further for a
>> few days; maybe somebody wants to play w/ this, or even better take a
>> look at the Read() path...
> Attached is the patch as I would add it for the next version.
I just realized that FadviseDrop() should, of course, be
private in cUnbufferedFile. But that doesn't change any
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