I was reading about the new Stratum server and I think it's causing issues with my cudaminer (750 Ti) rig.
I'm running steady at 1.8 Mh/s, but since yesterday it is reporting less. (From 1.8 -> ~ 1.45)
On the below graph, you can see it drop down and stay well below where it usually is. The first dip, i'm assuming, is when the server switched over? After that, I did two reboots when I noticed the drop in khash, which you can see on the graph as well. (Windows Updates slowed down my shutdown/restart, allowing it to show up on the graph)
Can someone please tell me why I'm seeing the drop in khash all of a sudden, even when my rig is running at 1.8 MH/s still? Something I need to re-configure in the cudaminer.bat to work better on intensity?
The biggest issue is that my BTC / Day / 1mH DROPPED as well! So, not only is it reporting lower, it IS lower.
I just posted this up on /r/wafflepool and immediately, someone else said "I have the same issue!"
Help?
Since the new stratum code went live on wafflepool, I have been seeing a strange behavior on my cudaminer boxes where the GPUs end up idling down to zero activity, and then they ramp back up to full utilization again when they get a "stratum detected new block", message, often around 10-15 seconds later. This idling/ramping behaviour never happened prior to the new stratum code going online the other day. cudaminer prints no timeouts or other debugging info to indicate that there's a problem, but it's very obvious that the miner code is waiting on a message from the server, which is arriving very "late", let's say. Once the detected new block message shows up, the GPUs ramp back up and typically continue running flat out again for a minute or two, sometimes for several minutes before they idle out again. If I watch the GPUs using nvidia-smi, I can see that they are dropping to 0% utilization when this is occuring, so cudaminer is definitely waiting on something from the server. All three of my mining rigs started behaving this way when the new stratum server went online...