geth GPU Mining

0xff

@Genoil, this is interesting. I cannot explain it other than by error in the ethminer. Should this be reported as ethminer error?

With option -G

MP02s-Mac-Pro:~ mp02$ ethminer -G -M
Benchmarking on platform: 8-thread CPU
Preparing DAG...
ℹ 18:09:34|main Loading from libethash...
ℹ 18:09:34|main Done loading.
Warming up...
Trial 1... 223517
Trial 2... 224183
Trial 3... 227590
Trial 4... 224700
Trial 5... 225774
min/mean/max: 223517/225152/227590 H/s
inner mean: 225491 H/s
Phoning home to find world ranking...
Error phoning home. ET is sad.

With option -C

MP02s-Mac-Pro:~ mp02$ ethminer -C -M
Benchmarking on platform: 8-thread CPU
Preparing DAG...
ℹ 18:10:24|main Loading from libethash...
ℹ 18:10:24|main Done loading.
⚡ 18:10:24|main Start worker 0.239137 s
⚡ 18:10:24|main Start worker 0.398502 s
Warming up...
Trial 1... 223592
Trial 2... 230666
Trial 3... 225333
Trial 4... 225033
Trial 5... 226257
min/mean/max: 223592/226176/230666 H/s
inner mean: 227010 H/s
Phoning home to find world ranking...
Error phoning home. ET is sad.

This one is from the same Mac Pro with 3.7Ghz 4core CPU and AMD FirePro D300 2048 MB graphics.

Can you suggest more things to test?

0xff

I was running some background tasks in the previous tests, so actual hashes are higher. This reflects the reality better:

-C:

MP02s-Mac-Pro:~ mp02$ ethminer -C -M
Benchmarking on platform: 8-thread CPU
Preparing DAG...
ℹ 18:21:57|main Loading from libethash...
ℹ 18:21:57|main Done loading.
Warming up...
Trial 1... 612645
Trial 2... 622000
Trial 3... 620586
Trial 4... 617666
Trial 5... 620046
min/mean/max: 612645/618588/622000 H/s
inner mean: 620084 H/s
Phoning home to find world ranking...
Error phoning home. ET is sad.

-G:

MP02s-Mac-Pro:~ mp02$ ethminer -G -M
Benchmarking on platform: 8-thread CPU
Preparing DAG...
ℹ 18:22:42|main Loading from libethash...
ℹ 18:22:42|main Done loading.
Warming up...
Trial 1... 621666
Trial 2... 622333
Trial 3... 622170
Trial 4... 620173
Trial 5... 605455
min/mean/max: 605455/618359/622333 H/s
inner mean: 621558 H/s
Phoning home to find world ranking...
Error phoning home. ET is sad.


Results are the same, both profiling CPU.

Genoil

@0xff your build of ethminer doesn't seem to support GPU mining at all. Are you sure you ran cmake with -DETHASHCL=1 ?

0xff

@Genoil I did not add that def. Is it possible to add it to brew? Instructions for Mac OS X mention only brew with --devel flag.

I will try to use instructions for Ubuntu. If you know where instructions for Mac OS X + GPU can be found, please let me know. And thanks for heads up.

0xff

@Genoil
Found this nice manual https://github.com/ethereum/homebrew-ethereum/blob/master/README.md

added --with-gpu-mining which I totally missed in previous builds

and now the result look like this:

MP02s-Mac-Pro:~ mp02$ ethminer -G -M --opencl-device 0
Benchmarking on platform: { "platform": "Apple", "device": "Intel(R) Xeon(R) CPU E5-1620 v2 @ 3.70GHz", "version": "OpenCL 1.2 " }
Preparing DAG...
ℹ 21:40:16|main Loading from libethash...
ℹ 21:40:16|main Done loading.
Warming up...
ℹ 21:40:16|gpuminer0 workLoop 0 #00000000… #00000000…
Using platform: Apple
Using device: Intel(R) Xeon(R) CPU E5-1620 v2 @ 3.70GHz(OpenCL 1.2 )
✘ 21:40:17|gpuminer0 Error GPU mining. GPU memory fragmentation?
Trial 1... 0
Trial 2... 0
Trial 3... 0
Trial 4... 0
Trial 5... 0
min/mean/max: 0/0/0 H/s
inner mean: 0 H/s


This is the right track to some non-zero hashes.

Genoil

@0xff i've seen the same from another Mac user here, yesterday. What it tries is use your CPU as an OpenCL device. That doesn't work for eth/ethminer. Try --opencl-device 1 or 2 (since I just noticed on Github you have two GPU's). It's currently not possible to mine multi-GPU while excluding device 0, so you're limited to one for now, or perhaps it is possuble to run ethminer twice with different --opencl-device.

0xff

@Genoil A while ago I already tried running with option --opencl-device 1 and 2, but that crashed with segmentation fault. Will try again and post results.

bitnovosti

Using the same ethminer / geth --rpc setup, got results similar to 0xff's. ethminer seems to be mining, geth seems to be committing work.

After a while, I was able to mine a block! Reward goes to geth's coinbase, it seems.

0xff

@Genoil

The results are in:

with dev 0

mp02$ ethminer -G -M --opencl-device 0
Benchmarking on platform: { "platform": "Apple", "device": "Intel(R) Xeon(R) CPU E5-1620 v2 @ 3.70GHz", "version": "OpenCL 1.2 " }
Preparing DAG...
ℹ 23:18:05|main Loading from libethash...
ℹ 23:18:05|main Done loading.
Warming up...
ℹ 23:18:05|gpuminer0 workLoop 0 #00000000… #00000000…
Using platform: Apple
Using device: Intel(R) Xeon(R) CPU E5-1620 v2 @ 3.70GHz(OpenCL 1.2 )
✘ 23:18:05|gpuminer0 Error GPU mining. GPU memory fragmentation?
Trial 1... 0
Trial 2... 0
Trial 3... 0
Trial 4... 0
Trial 5... 0
min/mean/max: 0/0/0 H/s
inner mean: 0 H/s
Phoning home to find world ranking...
Error phoning home. ET is sad.

with dev 1

mp02$ ethminer -G -M --opencl-device 1
Benchmarking on platform: { "platform": "Apple", "device": "AMD Radeon HD - FirePro D300 Compute Engine", "version": "OpenCL 1.2 " }
Preparing DAG...
ℹ 23:18:31|main Loading from libethash...
ℹ 23:18:31|main Done loading.
Warming up...
ℹ 23:18:31|gpuminer0 workLoop 0 #00000000… #00000000…
Using platform: Apple
Using device: AMD Radeon HD - FirePro D300 Compute Engine(OpenCL 1.2 )
Segmentation fault: 11

with dev 2

mp02$ ethminer -G -M --opencl-device 2
Benchmarking on platform: { "platform": "Apple", "device": "AMD Radeon HD - FirePro D300 Compute Engine", "version": "OpenCL 1.2 " }
Preparing DAG...
ℹ 23:18:42|main Loading from libethash...
ℹ 23:18:42|main Done loading.
Warming up...
ℹ 23:18:42|gpuminer0 workLoop 0 #00000000… #00000000…
Using platform: Apple
Using device: AMD Radeon HD - FirePro D300 Compute Engine(OpenCL 1.2 )
Segmentation fault: 11

At least it is nice that cards were identified. I wish my C++ would not be that rusty, so I could debug it. If any developers are ready do give guidance, I will take it for a spin.

0xff

@bitnovosti

A few questions:
What platform did you build on?
Was it with GPU support?
Did you mine the block with just "geth --rpc" or "geth --mine --rpc" ?

I am inclined to think that geth miner with --rpc does not show the HAMMER + mined block #xxxxxx.

bitnovosti

@0xff

It was OSX 10.10.2, both go and cpp ethereum installed by homebrew with --devel flag.
It's on MacBook Pro with AMD Radeon HD 6770M, did not set any --opencl-device flags, so default must work.
Used "geth --rpc console" and started miner via console if I recall correctly. Didn't get any blocks for a long time, so was unsure if it's working or not. But in the end it did, and the block reward went to eth.coinbase. Well, technically there is an off chance that geth CPU miner nailed the block against all odds, but I strongly doubt it. So, my working theory is that ethminer+geth combo works.

Wasn't able to replicate this on Ubuntu, though - ethminer keeps crashing there - which is a pity as MBP GPU sucks.

0xff

@bitnovosti
Thaks for input. Just for kicks I compiled the thing on my MacBook too which happens to have one Iris Pro graphics card. This one worked fine, so I assume that issue is that Mac Pro has 2x graphics cards.

@Genoil
I reported this in cpp-ethereum issues section: https://github.com/ethereum/cpp-ethereum/issues/1936

Barkely

Sir,
I am mining by using ethminer.The command line is "ethminer -G -F http://127.0.0.1:8545 "

The output in console is below::

miner 12:08:20|main Mining on PoWhash #93343d49??: 0 H/s = 0 hashes / 0.511 s
miner 12:08:20|main Mining on PoWhash #93343d49??: 0 H/s = 0 hashes / 0.505 s
miner 12:08:21|main Mining on PoWhash #93343d49??: 0 H/s = 0 hashes / 0.509 s
miner 12:08:21|main Got work package:
miner 12:08:21|main Header-hash: 6ee83c25845f17bb71571bb0a4bcdc6441b0b3fefb8aae066cb7b020826b6e74
miner 12:08:21|main Seedhash: b08741c315151129d790a3a705898f9d0c5155391030d506c3c7bbb672a1767d
miner 12:08:21|main Target: 000000000004acd78b0a9e65855516031225f26e82833c2414162ef71f288d32
! 12:08:21|main Stop worker 235 ms
! 12:08:21|main Stop worker 108 ms
! 12:08:21|main Stop worker 152 ms
! 12:08:22|main Stop worker 166 ms
! 12:08:22|main Stop worker 117 ms
! 12:08:22|main Stop worker 137 ms
miner 12:08:23|main Mining on PoWhash #6ee83c25??: 0 H/s = 0 hashes / 0.5 s
miner 12:08:23|main Mining on PoWhash #6ee83c25??: 0 H/s = 0 hashes / 0.513 s
miner 12:08:24|main Mining on PoWhash #6ee83c25??: 0 H/s = 0 hashes / 0.514 s
miner 12:08:24|main Mining on PoWhash #6ee83c25??: 0 H/s = 0 hashes / 0.513 s
miner 12:08:25|main Mining on PoWhash #6ee83c25??: 0 H/s = 0 hashes / 0.516 s
miner 12:08:25|main Mining on PoWhash #6ee83c25??: 0 H/s = 0 hashes / 0.513 s
miner 12:08:26|main Mining on PoWhash #6ee83c25??: 0 H/s = 0 hashes / 0.514 s
......
Is this OK? I am not sure whether the theminer is working?

Thanks!
Barkely

Barkely

Sir,

Ethminer seems to be working. The following messages show the mining process:
miner 14:01:51|main Mining on PoWhash #f6ec5ef6??: 663793 H/s = 346500 hashes / 0.522 s
miner 14:01:52|main Mining on PoWhash #f6ec5ef6??: 650258 H/s = 377800 hashes / 0.581 s
miner 14:01:52|main Got work package:
miner 14:01:52|main Header-hash: c22b71bd4cee870871b2c6b97bd533f407442b663cd08a407e3e0707df6159cd
miner 14:01:52|main Seedhash: b08741c315151129d790a3a705898f9d0c5155391030d506c3c7bbb672a1767d
miner 14:01:52|main Target: 000000000004afc1b8d61146600cfce7912aace4ea53605e49567dd3b8e620d0
miner 14:01:53|main Mining on PoWhash #c22b71bd??: 775098 H/s = 395300 hashes / 0.51 s
miner 14:01:53|main Mining on PoWhash #c22b71bd??: 664448 H/s = 349500 hashes / 0.526 s
miner 14:01:54|main Mining on PoWhash #c22b71bd??: 654545 H/s = 345600 hashes / 0.528 s
miner 14:01:54|main Mining on PoWhash #c22b71bd??: 663117 H/s = 348800 hashes / 0.526 s
miner 14:01:55|main Mining on PoWhash #c22b71bd??: 648042 H/s = 364200 hashes / 0.562 s
miner 14:01:55|main Got work package:
miner 14:01:55|main Header-hash: 4147e04aacd8269e399a391c6891d200bc08376f8b61767dfc15d3a5f123a62b
miner 14:01:55|main Seedhash: b08741c315151129d790a3a705898f9d0c5155391030d506c3c7bbb672a1767d
miner 14:01:55|main Target: 000000000004af2bbd6a6ab7c5fb31d7374c994936a14a1ec7b2312d338a3c20
miner 14:01:56|main Mining on PoWhash #4147e04a??: 764354 H/s = 396700 hashes / 0.519 s
miner 14:01:56|main Mining on PoWhash #4147e04a??: 658047 H/s = 363900 hashes / 0.553 s
miner 14:01:57|main Mining on PoWhash #4147e04a??: 661641 H/s = 346700 hashes / 0.524 s
miner 14:01:57|main Mining on PoWhash #4147e04a??: 655363 H/s = 378800 hashes / 0.578 s
...

Awesomeboy

For minign only, you have to build the ethminer binary from source and set it up for GPU mining!