Bitmessage/PyBitmessage-2024-12-03
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openclpow quality fixes

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lakshyacis 2019-10-22 19:53:23 +05:30
parent 1181db66e0
commit cacac00e21
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1 changed files with 30 additions and 23 deletions
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49
src/openclpow.py
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@ -1,8 +1,9 @@
#!/usr/bin/env python2.7 #!/usr/bin/env python2.7
"""
Module for Proof of Work using OpenCL
"""
from struct import pack, unpack from struct import pack, unpack
import time
import hashlib import hashlib
import random
import os import os
from bmconfigparser import BMConfigParser from bmconfigparser import BMConfigParser
@ -27,6 +28,8 @@ except ImportError:
def initCL(): def initCL():
"""Initlialise OpenCL engine"""
# pylint: disable=global-statement
global ctx, queue, program, hash_dt, libAvailable global ctx, queue, program, hash_dt, libAvailable
if libAvailable is False: if libAvailable is False:
return return
@ -40,12 +43,13 @@ def initCL():
for platform in cl.get_platforms(): for platform in cl.get_platforms():
gpus.extend(platform.get_devices(device_type=cl.device_type.GPU)) gpus.extend(platform.get_devices(device_type=cl.device_type.GPU))
if BMConfigParser().safeGet("bitmessagesettings", "opencl") == platform.vendor: if BMConfigParser().safeGet("bitmessagesettings", "opencl") == platform.vendor:
enabledGpus.extend(platform.get_devices(device_type=cl.device_type.GPU)) enabledGpus.extend(platform.get_devices(
device_type=cl.device_type.GPU))
if platform.vendor not in vendors: if platform.vendor not in vendors:
vendors.append(platform.vendor) vendors.append(platform.vendor)
except: except:
pass pass
if (len(enabledGpus) > 0): if enabledGpus:
ctx = cl.Context(devices=enabledGpus) ctx = cl.Context(devices=enabledGpus)
queue = cl.CommandQueue(ctx) queue = cl.CommandQueue(ctx)
f = open(os.path.join(paths.codePath(), "bitmsghash", 'bitmsghash.cl'), 'r') f = open(os.path.join(paths.codePath(), "bitmsghash", 'bitmsghash.cl'), 'r')
@ -55,23 +59,29 @@ def initCL():
else: else:
logger.info("No OpenCL GPUs found") logger.info("No OpenCL GPUs found")
del enabledGpus[:] del enabledGpus[:]
except Exception as e: except Exception:
logger.error("OpenCL fail: ", exc_info=True) logger.error("OpenCL fail: ", exc_info=True)
del enabledGpus[:] del enabledGpus[:]
def openclAvailable(): def openclAvailable():
return (len(gpus) > 0) """Are there any OpenCL GPUs available?"""
return bool(gpus)
def openclEnabled(): def openclEnabled():
return (len(enabledGpus) > 0) """Is OpenCL enabled (and available)?"""
return bool(enabledGpus)
def do_opencl_pow(hash, target):
def do_opencl_pow(hash_, target):
"""Perform PoW using OpenCL"""
output = numpy.zeros(1, dtype=[('v', numpy.uint64, 1)]) output = numpy.zeros(1, dtype=[('v', numpy.uint64, 1)])
if (len(enabledGpus) == 0): if not enabledGpus:
return output[0][0] return output[0][0]
data = numpy.zeros(1, dtype=hash_dt, order='C') data = numpy.zeros(1, dtype=hash_dt, order='C')
data[0]['v'] = ("0000000000000000" + hash).decode("hex") data[0]['v'] = ("0000000000000000" + hash_).decode("hex")
data[0]['target'] = target data[0]['target'] = target
hash_buf = cl.Buffer(ctx, cl.mem_flags.READ_ONLY | cl.mem_flags.COPY_HOST_PTR, hostbuf=data) hash_buf = cl.Buffer(ctx, cl.mem_flags.READ_ONLY | cl.mem_flags.COPY_HOST_PTR, hostbuf=data)
@ -83,7 +93,6 @@ def do_opencl_pow(hash, target):
kernel.set_arg(0, hash_buf) kernel.set_arg(0, hash_buf)
kernel.set_arg(1, dest_buf) kernel.set_arg(1, dest_buf)
start = time.time()
progress = 0 progress = 0
globamt = worksize * 2000 globamt = worksize * 2000
@ -96,20 +105,18 @@ def do_opencl_pow(hash, target):
cl.enqueue_copy(queue, output, dest_buf) cl.enqueue_copy(queue, output, dest_buf)
queue.finish() queue.finish()
progress += globamt progress += globamt
sofar = time.time() - start
# logger.debug("Working for %.3fs, %.2f Mh/s", sofar, (progress / sofar) / 1000000)
if shutdown != 0: if shutdown != 0:
raise Exception("Interrupted") raise Exception("Interrupted")
taken = time.time() - start
# logger.debug("Took %d tries.", progress) # logger.debug("Took %d tries.", progress)
return output[0][0] return output[0][0]
#initCL()
if __name__ == "__main__": if __name__ == "__main__":
target = 54227212183L initCL()
initialHash = "3758f55b5a8d902fd3597e4ce6a2d3f23daff735f65d9698c270987f4e67ad590b93f3ffeba0ef2fd08a8dc2f87b68ae5a0dc819ab57f22ad2c4c9c8618a43b3".decode("hex") target_ = 54227212183
nonce = do_opencl_pow(initialHash.encode("hex"), target) initialHash = ("3758f55b5a8d902fd3597e4ce6a2d3f23daff735f65d9698c270987f4e67ad590"
trialValue, = unpack('>Q',hashlib.sha512(hashlib.sha512(pack('>Q',nonce) + initialHash).digest()).digest()[0:8]) "b93f3ffeba0ef2fd08a8dc2f87b68ae5a0dc819ab57f22ad2c4c9c8618a43b3").decode("hex")
print "{} - value {} < {}".format(nonce, trialValue, target) nonce = do_opencl_pow(initialHash.encode("hex"), target_)
trialValue, = unpack(
'>Q', hashlib.sha512(hashlib.sha512(pack('>Q', nonce) + initialHash).digest()).digest()[0:8])
print "{} - value {} < {}".format(nonce, trialValue, target_)