ethminer help / run commands

Basic help runtime details from

Example to mine with Nvida CUDA enabled: ethminer.exe -RH -U

>ethminer.exe --help
Usage ethminer [OPTIONS]

Work farming mode:

-F,--farm Put into mining farm mode with the work server at URL (default:
-FF,-FO, --farm-failover, --stratum-failover Failover getwork/stratum URL (default: disabled)
--farm-retries Number of retries until switch to failover (default: 3)
-S, --stratum Put into stratum mode with the stratum server at host:port
-SF, --stratum-failover Failover stratum server at host:port
-O, --userpass Stratum login credentials
-FO, --failover-userpass Failover stratum login credentials (optional, will use normal credentials when omitted)
--work-timeout reconnect/failover after n seconds of working on the same (stratum) job. Defaults to 180. Don't set lower than max. avg. block time
-SC, --stratum-client Stratum client version. Defaults to 1 (async client). Use 2 to use the new synchronous client.
-SP, --stratum-protocol Choose which stratum protocol to use:
0: official stratum spec: ethpool, ethermine, coinotron, mph, nanopool (default)
1: eth-proxy compatible: dwarfpool, f2pool, nanopool (required for hashrate reporting to work with nanopool)
2: EthereumStratum/1.0.0: nicehash
-RH, --report-hashrate Report current hashrate to pool (please only enable on pools supporting this)
-HWMON Displays gpu temp and fan percent.
-SE, --stratum-email Email address used in eth-proxy (optional)
--farm-recheck Leave n ms between checks for changed work (default: 500). When using stratum, use a high value (i.e. 2000) to get more stable hashrate output

Benchmarking mode:

-M [],--benchmark [] Benchmark for mining and exit; Optionally specify block number to benchmark against specific DAG.
--benchmark-warmup Set the duration of warmup for the benchmark tests (default: 3).
--benchmark-trial Set the duration for each trial for the benchmark tests (default: 3).
--benchmark-trials Set the number of benchmark trials to run (default: 5).
Simulation mode:
-Z [],--simulation [] Mining test mode. Used to validate kernel optimizations. Optionally specify block number.
Mining configuration:
-G,--opencl When mining use the GPU via OpenCL.
-U,--cuda When mining use the GPU via CUDA.
-X,--cuda-opencl Use OpenCL + CUDA in a system with mixed AMD/Nvidia cards. May require setting --opencl-platform 1
--opencl-platform When mining using -G/--opencl use OpenCL platform n (default: 0).
--opencl-device When mining using -G/--opencl use OpenCL device n (default: 0).
--opencl-devices <0 1 ..n> Select which OpenCL devices to mine on. Default is to use all
-t, --mining-threads Limit number of CPU/GPU miners to n (default: use everything available on selected platform)
--list-devices List the detected OpenCL/CUDA devices and exit. Should be combined with -G or -U flag
-L, --dag-load-mode DAG generation mode.
parallel - load DAG on all GPUs at the same time (default)
sequential - load DAG on GPUs one after another. Use this when the miner crashes during DAG generation
single - generate DAG on device n, then copy to other devices
--cl-local-work Set the OpenCL local work size. Default is 128
--cl-global-work Set the OpenCL global work size as a multiple of the local work size. Default is 8192 * 128
--cl-parallel-hash <1 2 ..8> Define how many threads to associate per hash. Default=8
--cuda-block-size Set the CUDA block work size. Default is 128
--cuda-grid-size Set the CUDA grid size. Default is 8192
--cuda-streams Set the number of CUDA streams. Default is 2
--cuda-schedule Set the schedule mode for CUDA threads waiting for CUDA devices to finish work. Default is 'sync'. Possible values are:
auto - Uses a heuristic based on the number of active CUDA contexts in the process C and the number of logical processors in the system P. If C > P, then yield else spin.
spin - Instruct CUDA to actively spin when waiting for results from the device.
yield - Instruct CUDA to yield its thread when waiting for results from the device.
sync - Instruct CUDA to block the CPU thread on a synchronization primitive when waiting for the results from the device.
--cuda-devices <0 1 ..n> Select which CUDA GPUs to mine on. Default is to use all
--cuda-parallel-hash <1 2 ..8> Define how many hashes to calculate in a kernel, can be scaled to achieve better performance. Default=4
--api-port Set the api port, the miner should listen to. Use 0 to disable. Default=0, use negative numbers to run in readonly mode. for example -3333.

General Options:

-v,--verbosity <0 - 9> Set the log verbosity from 0 to 9 (default: 8).
-V,--version Show the version and exit.
-h,--help Show this help message and exit.

Crypto Mining with Google NVIDIA Tesla K80 / P100

Even with the 50% discounted preemptable instances now available in Google cloud, cryptocurrency (BTC, LTC, ETH, XMR, other) mining is simply not profitable.

Despite the shady steemit article “Ethereum Mining with Google Cloud (Nvidia Tesla K80) actually works and is highly profitable”, no,
Mining on these GPUs is simply not a profitable business.

BCN mining on the K80 is about 126 H/s per GPU. ($12/month at the current price/difficulty)

ETH mining on the K80 is about 6.5Mh/s (CUDA Mining)

ETH mining on the K80 is about 7.1Mh/s (OpenGL Mining)

ETH / Sia coin mines roughly 7.1 and 71.8 MH/s (respectively, via Claymore Dual Eth Miner)

Please share your results from testing in the comments.