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TROUBLESHOOTING.md

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Troubleshooting

Follow this checklist to verify that your entire hardware and software stack works (drivers, OpenCL, SILENTARMY).

Driver / OpenCL installation

Run clinfo to list all the OpenCL devices. If it does not find all your devices, something is wrong with your drivers and/or OpenCL stack. Uninstall and reinstall your drivers. Here are good instructions: https://hashcat.net/wiki/doku.php?id=frequently_asked_questions#i_may_have_the_wrong_driver_installed_what_should_i_do

Check silentarmy

Does ./silentarmy --list list your devices? If clinfo does, silentarmy should list them as well.

Basic operation

Run the Equihash solver sa-solver to solve the all-zero block. It should report 2 solutions. Specify the device ID to test with --use ID

$ ./sa-solver --use 0
Solving default all-zero 140-byte header
Building program
Hash tables will use 805.3 MB
Running...
Nonce 0000000000000000000000000000000000000000000000000000000000000000: 2 sols
Total 2 solutions in 205.3 ms (9.7 Sol/s)

Note that sa-solver only supports 1 device at a time. It will not recognize eg. --use 0,1,2.

Correct results

Verify that make test succeeds. It should take between 5 and 60 seconds depending on your GPU:

$ make test
Testing...
Test: success

Sustained operation on one device

Let the Equihash solver sa-solver run for multiple hours:

$ ./sa-solver --nonces 100000000
Solving default all-zero 140-byte header
Building program
Hash tables will use 1208.0 MB
Running...
Nonce 0000000000000000000000000000000000000000000000000000000000000000: 2 sols
Nonce 0100000000000000000000000000000000000000000000000000000000000000: 0 sols
...

It should not crash or hang.

Mining

Run the miner without options. By default it will use the first device, and connect to flypool with my donation address. These known-good parameters should let you know easily if your machine can mine properly:

$ ./silentarmy
Connecting to us1-zcash.flypool.org:3333
Stratum server sent us the first job
Mining on 1 device
Total 0.0 sol/s [dev0 0.0] 0 shares
Total 48.9 sol/s [dev0 48.9] 1 share
Total 44.9 sol/s [dev0 44.9] 1 share
...

Verify that the number of shares increases over time.

Performance

Not reaching the sol/s performance you expected?

  • Try running a different number of instances using the silentarmy --instances N argument. Try 1, 2, 3, or more. Note that each instance requires 805 MB of GPU memory.
  • If 1 instance still requires more GPU memory than available, edit param.h and set NR_ROWS_LOG to 19 (this reduces the per-instance memory usage to 671 MB) and run with --instances 1.
  • By default SILENTARMY mines with only one device/GPU; make sure to specify all the GPUs in the --use option, for example silentarmy --use 0,1,2 if the host has three devices with IDs 0, 1, and 2.
  • Update your graphics card driver. The OpenCL compiler comes with the driver and occasionally new driver versions significantly tweak or improve it.