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ethereum-mining / ethminer

Ethereum miner with OpenCL, CUDA and stratum support
GNU General Public License v3.0
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v0.16.0.rc0 can't load binary kernel, opencl kernel 7MH/s slower #1520

Closed antonioshadji closed 6 years ago

antonioshadji commented 6 years ago

I compiled v0.16.0.rc0 (without CUDA support) today for testing. I have been running 0.16.0.dev0+commit.781feb6f with no issues and a hash rate of 116MH/s across 4 RX580s. The latest version is clocking in no higher than 109MH/s.

old version is started with:
ethminer -G -P pool1 pool2 --cl-local-work 256 --cl-global-work 16384 --cl-kernel 1 --cl-parallel-hash 2 --report-hashrate --syslog --HWMON 1 The new version was tested with:
sudo ./ethminer/ethminer -G --cl-local-work 256 --cl-global-work 16384 --report-hashrate --HWMON 1 -P pool1 pool2

On start, v0.16.0.rc0 reports:
l 11:21:23 cl-1 Loading binary kernel /mnt/projects/mining/software/ethminer/build.16.rc0/ethminer/kernels/ethash_ellesmere_lws256.bin
X 11:21:23 cl-1 Failed to load binary kernel: /mnt/projects/mining/software/ethminer/build.16.rc0/ethminer/kernels/ethash_ellesmere_lws256.bin

There is no kernels folder in this location. and no ethash_ellesmere_lws256.bin was built.

To Reproduce Steps to reproduce the behavior:

  1. Compile per instructions in README.md
  2. Start ethminer with above command.
  3. See error in log and speed in log

Expected behavior similar or better performance when compared to older version.

Desktop

I understand that most of the active devs have nvidia rigs. I have 2 rigs with total 12 AMD rx 580/570. If there is anything I can do to help the AMD support please let me know.

lesjokolat commented 6 years ago

I ve tried but cant use this tool successfully on Windows.

https://github.com/CLRX/CLRX-mirror

Its a kernel compiler and in theory one could build custom kernels like the ones missing. Personally documentation is so advanced most people(myself included) get lost. its lacking more info around examples and syntax to create kernels...

antonioshadji commented 6 years ago

I found the kernels after following these steps:

  1. git clone git@github.com:CLRX/CLRX-mirror.git
  2. cd CLRX-mirror
  3. mkdir build
  4. cd build
  5. cmake .. -DBUILD_TESTS=ON -DBUILD_SAMPLES=ON -DBUILD_DOCUMENTATION=ON
  6. make
  7. sudo make install

Then I recompiled ethminer. The kernels are in the top level git directory /libethash-cl/kernels/bin They have to be moved to a kernels directory in the same folder as the ethminer executable to be found.

I'm now seeing the same speeds and about +5 watts per card (+20 watts over 4 cards)

ddobreff commented 6 years ago

I'd suggest stick to --cl-local-work 64-192, a bit less power but hashrate remains the same.

antonioshadji commented 6 years ago

I tried --cl-local-work 64 and --cl-local-work 192. neither changed the power consumption significantly.
the difference looks closer to +4 watts per card.

ddobreff commented 6 years ago

We are aware of the increased power and as of now none of devs is looking into power reducing solution, but its already discussed.

antonioshadji commented 6 years ago

I'm closing this issue since the power consumption is known and not a bug.