I really don't know if this will affect, since we're not using getwork protocol right?. I extracted it from: https://github.com/slush0/stratum-mining-proxy

Compiling midstate C extension

For some really big operations using getwork interface of this proxy, you'll find useful "midstatec" C extension, which significantly speeds up midstate calculations (yes, plain python implementation is so slow). For enabling this extension, just type "make" in midstatec directory. Proxy will auto-detect compiled extension on next startup.


So I wake up today to find that the hash rate of my blade has slowed down to ~5000 Mhash/s. Any idea? 

Edit: Ok, I think it is because of the fan controller. It shuts down the setup when it detects high temperature. Fuck, I should have bought a simpler one...