Re: Updated disc cache

In message <20150403111441.GB18724@kyllikki.org>
on 3 Apr 2015 Vincent Sanders <vince@netsurf-browser.org> wrote:

> I know several RISC OS users regularly use the CI builds and have had
> issues with the disc cache. This is partly a request for assistance
> and partly a warning.

> I have recently changed the disc based caching to use fewer small
> files. This change is not backwards compatible and will leave the old
> cache files behind.

> I would suggest that any of you using the disc cache to delete it
> before running a NetSurf CI version after #2696 NetSurf will continue
> to run just fine if you do not but all the old cache files will be
> left behind and never cleaned up.

> The upside of this change is that it *may* help with performance for
> those of you that were seeing repeated warnings about insufficient
> disc bandwidth.

> As I have explained previously on several occasions the RISC OS
> filesystem performance appears to be very poor when using several
> small files, the new system uses a handful of large files as well to
> remove this as an issue.

> If you have previously disabled the cache please can I ask you to
> retry with the newer versions and see if the performance has improved?

> If you are feeling very adventurous you can report the bandwidth
> achieved. This is a line in the debug Log file held in scrap *after*
> the browser has been quit. The last line of the Log will read
> something like:

> (2298.806358) desktop/netsurf.c netsurf_exit 294: Exited successfully

> The bandwidth line will be about 20 lines from the end of the log and
> look like

> (2298.804881) content/llcache.c llcache_finalise 3352: Backing store
> average bandwidth 128324035 bytes/second

ARMini with RO 5.20 (10 June 2013)
NS #2697

I went only to the www.buxtonweather.co.uk website. In the log I
found these
(20.420000) content/llcache.c llcache_persist 2494: Overran timeslot
(30.880000) content/llcache.c llcache_persist_slowcheck 2438: Cannot
write minimum bandwidth

(59.820000) content/llcache.c llcache_finalise 3352: Backing store
average bandwidth 33092 bytes/second

That last line was many more than 20 lines from the end of the file


Regards

Andrew
--
Andrew Pinder