netsurf: branch master updated. release/3.2-500-gd08acbc

Chris Young chris.young at unsatisfactorysoftware.co.uk
Sun Nov 30 16:09:51 GMT 2014


On Sun, 30 Nov 2014 15:01:54 +0000, Vincent Sanders wrote:

> > (22.696681) content/llcache.c llcache_persist 2414: Wrote 884 bytes in 225ms bw:3928 http://aminet.net/pics/at.gif
> > (22.696759) content/llcache.c llcache_persist 2420: Overran timeslot
> > (22.696828) content/llcache.c llcache_persist 2426: Cannot write minimum bandwidth
> > (22.697699) amiga/misc.c ami_misc_req 51: Disc cache write bandwidth is too slow to be useful, disabling cache
> 
> well under 4000 bytes a second is so slow that it is not useful.

Agreed...

> The
> disc caching really needs to be several multiples of the network
> conenction speed to be useful. Although the minimum bandwidth setting
> is a passe din parameter and you can chnage the default value in
> desktop/netsurf.c to experiment.

I'll have a look at that.
 
> Is it possible that your implementation of a milisecond monotonic
> counter in libnsutils is problematic? If it is returning microseconds
> instead of miliseconds that would cause this erroneus behaviour.

I thought it might be wrong, so I rewrote it using a different timer. 
I get very similar results to before.

When I return immediately, I'm still getting things like:
Wrote 94314 bytes in 1305ms
even though above it says:
Wrote 91944 bytes in 1ms

So there's something weird with the timer, or something slow is
happening between the timing interval.

I've just had a thought that some other task might be nicking the CPU
whilst the timing is happening - We're measuring how long it takes,
not how much CPU time it takes.  Perhaps the monotonic timer should be
measuring CPU time for the task it's running under?

Chris



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