Run gominer on AWS EC2 instance (P2 or G2) with CUDA 8.0

[Kmaschta]

I had this error while testing gominer on a g2.2xlarge EC2 instance. I successfuly installed CUDA 8.0 but:

13:16:08 2017-03-21 [INF] MAIN: Version 0.8.0-beta CUDA
13:16:08 2017-03-21 [INF] POOL: Using pool: stratum+tcp://dcr.suprnova.cc:2252
13:16:08 2017-03-21 [INF] POOL: Stratum difficulty set to 1
13:16:09 2017-03-21 [INF] MINR: 1 GPUs
panic: Unknown CUresult: 35

goroutine 52 [running, locked to thread]:
panic(0x8045e0, 0xc4204b00a0)
    /usr/lib/go/src/runtime/panic.go:500 +0x1a1
github.com/decred/gominer/vendor/github.com/barnex/cuda5/cu.DeviceReset()
    /home/jolan/go/src/github.com/decred/gominer/vendor/github.com/barnex/cuda5/cu/runtimeapi.go:23 +0x74
main.(*Device).runDevice(0xc420406000, 0x0, 0x0)
    /home/jolan/go/src/github.com/decred/gominer/cudevice.go:286 +0x131
main.(*Device).Run(0xc420406000)
    /home/jolan/go/src/github.com/decred/gominer/device.go:96 +0x2f
main.(*Miner).Run.func1(0xc420406000, 0xc42004acb0)
    /home/jolan/go/src/github.com/decred/gominer/miner.go:212 +0x2b
created by main.(*Miner).Run
    /home/jolan/go/src/github.com/decred/gominer/miner.go:215 +0x9d

It's pretty ununderstandable and I don't know what to do with it.

[jolan]

The CUDA library we're using can't reset your device:

https://github.com/barnex/cuda5/blob/master/cu/runtimeapi.go#L23

As far as I can tell, 'Unknown CUresult: 35' means 'CUDA driver version is insufficient for CUDA runtime version'. So you may have installed the CUDA 8.0 SDK but you have not updated the actual Nvidia drivers.

[jolan]

Closing -- I'm pretty sure I figured out the issue and there's been no response in 24h.

[Kmaschta]

Sorry! You are right, I had not the correct Nvidia driver but CUDA was up-to-date.

For more info if someone who read this is in trouble, here is how I fixed my issue:

• Go to the Nvidia Driver Download page
• For P2 instances (p2.xlarge, p2.8xlarge, p2.16xlarge) chose Tesla K80 Linux 64-bit
• For G2 instances (g2.2xlarge, g2.8xlarge) chose GRID Series K520 Linux 64-bit

Download the executable and run it on your server.

I have published a gist with my installation script, if it can help you: https://gist.github.com/Kmaschta/8de62ea5f73346a8f0c61b75fe36c93b

More info about EC2 GPU instances