To all KNC/MPSS users: Please immediately update to http://files.lukminer.com/lukMiner-0.9.2.tgz !
First of all: To all those that volunteered to be guinea-pigs and try the MPSS offload version I added in 0.9: A giant “mea culpa, mea culpa, mea maxima culpa”…. I hardly know how to write this without feeling like a complete ass, but that MPSS offload version did indeed have a major flaw that led to the KNC device code getting stuck in mining developer shares after 10 minutes, so to whoever ran that code: your KNC card(s) have been mining for me, and only for me, since 0.9 came out …. oh man, I don’t know what to say….
Reason I didn’t spot this sooner – even after two KNC/MPSS users reported un-expectedly low hashes for their accounts – is that this bug appears only in the MPSS offload version (not in cpu, phi, opencl, cuda, or even knc native mode) … and even when running that mpss mode it only happened for the shares computed on the KNC (the CPU threads still mined for the user)… and even then, it’d happen only after a few minutes… and even then, you’d only “really” see it if you ran without the CPU threads…. and even then, the outputs looked absolutely right, ….. which made it all so hard to reproduce. But still, those are nothing but empty excuses; I did verify the bug existed, and now I do feel like said “complete ass”.
Now, what next? First of all: Once again, mea culpa, that should not have happened. Also many, many thanks to those that reported this bug, and still stuck with me … I owe you one. Next: To every body that did run this MPSS version for a considerable time: let me know how much you think you should have made, and I’ll glady reimburse you (it can’t be that much; the MPSS shares are rather small). In addition: as another sign of how sorry I am I just changed to KNC miner share from 4% to 1%, indefinitely. And finally: if you do intend to run in MPSS mode, please update your miner to 0.9.2 ASAP (here the link: http://files.lukminer.com/lukMiner-0.9.2tgz).
Again, my most sincere apologies… I don’t know what else to say …
Update 2/11: Updates the link from “0.9.2rc2” (release candidate 2) to “0.9.2” (the actual release).