[Bug 96934] Mining Ethereum orders of magnitude slower than on proprietary drivers.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96934

            Bug ID: 96934
           Summary: Mining Ethereum orders of magnitude slower than on
                    proprietary drivers.
           Product: Mesa
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: lvella at gmail.com
        QA Contact: dri-devel at lists.freedesktop.org

By enabling a libclc extension on ethminer OpenCL code, I managed to run it
using Ubuntu 16.04 and Oibaf's PPA. The code has been merged into
https://github.com/ethereum/libethereum and you can benchmark it for yourself.

Using a Radeon r9 280X, I ran the following command:

$ ethminer -G -F
mine.weipool.org:5555/0x7079a42c78d28ce9216c290d1bbc61e7b12d54a3/0.5

and got in output, among other things:

...
miner  01:09:13.001|ethminer  Mining on PoWhash #20c1b379… : 556569 H/s =
524288 hashes / 0.942 s
miner  01:09:13.875|ethminer  Mining on PoWhash #20c1b379… : 599871 H/s =
524288 hashes / 0.874 s
miner  01:09:14.758|ethminer  Mining on PoWhash #20c1b379… : 296878 H/s =
262144 hashes / 0.883 s
miner  01:09:15.624|ethminer  Mining on PoWhash #20c1b379… : 606113 H/s =
524288 hashes / 0.865 s
miner  01:09:16.480|ethminer  Mining on PoWhash #20c1b379… : 612485 H/s =
524288 hashes / 0.856 s
miner  01:09:17.353|ethminer  Mining on PoWhash #20c1b379… : 601247 H/s =
524288 hashes / 0.872 s
miner  01:09:18.210|ethminer  Mining on PoWhash #20c1b379… : 611771 H/s =
524288 hashes / 0.857 s
...

This reported rash rate is about 3% of the rate my GPU is supposed to deliver
(it should be in the order of 22 MH/s). 

By the way, that command will mine on the public pool WeiPool and direct the
earnings to my address 0x7079a42c78d28ce9216c290d1bbc61e7b12d54a3. If you want
to try and don't send me money, change that number to you Ethereum or Bitcoin
address. Instructions in mine.weipool.org.

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