@ tritical - thanks, I see. (Hope so, at least).
Let me ask the other way round: IF a script involves decimation via tdecimate, what would be promising approaches to make use of multi-threading? Any? Or not at all, necessarily?
Gavino, jpsdr -
I might be a novice with MT, but I'm not
silly.
Of course I did not do TGMC().threadrequest(). Surely it was fiddled
into the script, but ... problems.
Practical example and problem: Consider this quite-familiar piece of code:
Code:
o = bob(0,0.5) #.threadrequest(10,5,2)
#
o.temporalsoften(1,255,255,28,2).merge(o,0.25) #.threadrequest(10,5,2)
#
sup = msuper() #.synchronize(80)
bv3 = sup.manalyse(isb=true,delta=3,search=4) #.threadrequest(10,5,2)
bv2 = sup.manalyse(isb=true,delta=2,search=4) #.threadrequest(10,5,2)
bv1 = sup.manalyse(isb=true,delta=1,search=4) #.threadrequest(10,5,2)
fv1 = sup.manalyse(isb=false,delta=1,search=4) #.threadrequest(10,5,2)
fv2 = sup.manalyse(isb=false,delta=2,search=4) #.threadrequest(10,5,2)
fv3 = sup.manalyse(isb=false,delta=3,search=4) #.threadrequest(10,5,2)
#
o.mdegrain3(sup,bv1,fv1,bv2,fv2,bv3,fv3) #.threadrequest(10,5,2)
Challenge: Use ThreadRequest within this little script, so that it actually works.
I added TR to some lines, I added it to all lines, with default parameters, with larger-than-default parameters, also with synchronize in various places .... my clueless try is shown right of the # column.
All I get is crashes after a few frames. It seems to get better when adding Synchronize(xx) to the sup=msuper() line - with that, it won't crash after just a view frames, but will crash after a few hundred frames.
Seems its quite some hassle to get it right ...
(... while SetMTMode runs out-of-the-box on this example. And for the time while the ThreadRequest'ed script IS running, it is slower than SetMTmode (66fps vs. 72fps).