python OpenCL bitcoin miner - page 56.

ShadowOfHarbringer

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Quote from: m0mchil on October 01, 2010, 02:06:06 PM

jgarzik: I tested this against vanilla client to be sure blocks are actually accepted. On ATI 4350 it makes ~5800 khash/s.

Hmm, that's weird. Shouldn't the speed be much bigger, like 10-fold or 100-fold faster at least ?

I mean there was this guy somewhere on the BTC forum who claimed that he's getting 983 Mhash/s (983 000 khash/sec) with just 3 radeons 5870 or something.

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Due to popular demand

bitcoin PyOpenCL miner is available now at http://github.com/m0mchil/poclbm

There are some minor fixes. Be sure to experiment with globalThreads to achieve better performance/dekstop lag ratio.

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ATI HD3850 has no OpenCL support.

4xxx and 5xxx have.

checker

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Will opencl client works on ati hd3850?

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davidonpda: you need

1. Some OpenCL capable hardware and driver.
2. python 2.6.6
3. PyOpenCL. This could be tricky, follow the official installation instructions.

oclbm.py -h or --help for some options, by default looks for bitcoin RPC at 127.0.0.1:8332

Hope this helps

nelisky

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Quote from: m0mchil on October 01, 2010, 02:06:06 PM

nelisky: Integrating CUDA/OpenCL seems to have portability issues. Also, my goal is actually to convince satoshi to patch the mainline. The patch must be crystal clear for this to happen.

Yes, that is one of my biggest concerns. I don't have enough exposure to assert in multiple platforms / hw. And I have failed to provide a simple click and use distributable, as of yet, but as interest increases and more developers tackle this I'm sure one of us will provide a clean implementation that is production quality for satoshi.

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nelisky: Integrating CUDA/OpenCL seems to have portability issues. Also, my goal is actually to convince satoshi to patch the mainline. The patch must be crystal clear for this to happen.

jgarzik: I tested this against vanilla client to be sure blocks are actually accepted. On ATI 4350 it makes ~5800 khash/s.

Forgot to mention that original client generation could be used in parallel.

jgarzik

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It is interesting to see how you've split mining and wallet+P2P into separate pieces. Nice and modular.

I'll be interested to see feedback from people, if they actually generate coins from this.

nelisky

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Quote from: m0mchil on October 01, 2010, 01:21:59 PM

I hope someone will try this wonderful OpenCL bitcoin miner. It uses PyOpenCl. Should be generally platform independent. The OpenCL kernel uses previous work by laszlo. You will need bitcoin patched with this to enable RPC getwork(). You may use as many external miners as you wish (if running RPC with -rpcallowip).

Have fun.

Amazing solution! Not good for the masses (it's better to integrate the miner in the binary) but great for experimentation and multiple machine mining. I'll be sure to have a go at this when I get a sec, kudos for putting this out.

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Latest miner

poclbm_py2exe_20120920

mirror

Sources for poclbm are at http://github.com/m0mchil/poclbm

GUI

Created by Kiv, see https://bitcointalksearch.org/topic/gui-mining-updated-dec-3-with-7970-bugfix-also-supports-stratum-3878

Guides

Windows - http://www.newslobster.com/random/how-to-get-started-using-your-gpu-to-mine-for-bitcoins-on-windows

Ubuntu - https://bitcointalksearch.org/topic/easy-ubuntu-python-opencl-mining-setup-2636

Mac - http://forum.bitcoin.org/index.php?topic=12360

Known best settings
(please PM better/best settings for your platform)

AMD 5xxx and up
use '-v -w 128'

Frequently asked questions

Q: Does my video card / driver supports OpenCL?

AMD - 4xxx and up. Nvidia - 8xxx and up. On Windows you can use 'GPU Caps Viewer' or similar.

Q: I am seeing 'pyopencl.LogicError: clGetPlatformIDs failed', what is this?
Q: It says 'ImportError: DLL load failed: The specified module could not be found'?
Q: Or 'ImportError: DLL load failed: The specified procedure could not be found'?

You don't have proper OpenCL support. The reasons may vary. Be sure to remove any old drivers and SDK from different vendors you may have used. Use web search to see how to make it work for your combination of GPU and OS.

Q: When I try to run it with the following parameters: '--host=http://mining.bitcoin.cz:8332' miner errors out with 'nonnumeric port'

Remove 'http://', it's intended for browsers (becames '--host=mining.bitcoin.cz'). Use '--port' to specify port (default is 8332 so you don't need to specify it if the pool you use is at same port).

Q: Why it uses 100% CPU?

You probably selected the CPU as OpenCL device. Or you are using it on Linux with AMD Stream SDK 2.2. Use 2.1 instead.

Q: What does 'invalid or stale' means?

The block last submitted was either invalid or stale.

Q: How a block becomes stale?

You submited solution for a block which was just solved by someone else.

Q: Why a block is invalid?

Don't overclock too much. And switch crossfire off. Or may be I screwed the search again?

It's good if you see more 'accepted's than 'invalid's.

When I try to run the miner a new CMD window flashes on my screen too rapidly to read anything, or even see if it says anything.

It's console application. You use that ugly black thing called 'Command Prompt' to run it.

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