I would like to share my deep doubts about the sense of changing cgminer queue parameter.
I know there are many guys here setting queue to 0, but documentation says there has to be 0+ (nonzero) value, so if You set 0 You set 1.
Bitmain sets default 4096 for S3, 8192 for S4/5 units. Personally I do not see ANY difference in what is set there. Yes, ckolivas has written few times, that probably that number is too high, but he also says, he is not author of a driver. So we have to suppose it is better to set there 1 just because it is default setting of cgminer?
Spondoolies... I do not have any idea what queue value is it using, but probably default, so probably 1. I did not study it too much, but are there the same chips? Probably not.
What the queue is good for?
I have tried mining solo some easy altcoin to see, if it makes difference to use value 1 or 1024. Miner is 100GHs (just two pensil moded blades from S1 connected directly thru cp2101 to the laptop with compiled cgminer 4.7.0). No difference there.
From some time I doubt it makes sense to change queue parameter and I do not change it. Let me know if You have any prove of the fact it should increase efficiency and why You think it is so.