OpenCL vendor selector

- when you have multiple OpenCL drivers at the same time, e.g. intel and
  nvidia, they won't mix leading to crashes. This patch makes it
  possible to select which driver to use by listing the available
  vendors

src/bitmessageqt/__init__.py

@@ -2408,8 +2408,8 @@ class MyForm(settingsmixin.SMainWindow):
                 shared.config.set('bitmessagesettings', 'defaultpayloadlengthextrabytes', str(int(float(
                     self.settingsDialogInstance.ui.lineEditSmallMessageDifficulty.text()) * shared.networkDefaultPayloadLengthExtraBytes)))
 
-            if openclpow.has_opencl() and self.settingsDialogInstance.ui.checkBoxOpenCL.isChecked() != shared.safeConfigGetBoolean("bitmessagesettings", "opencl"):
+            if self.settingsDialogInstance.ui.checkBoxOpenCL.currentText().toUtf8() != shared.safeConfigGet("bitmessagesettings", "opencl"):
-                shared.config.set('bitmessagesettings', 'opencl', str(self.settingsDialogInstance.ui.checkBoxOpenCL.isChecked()))
+                shared.config.set('bitmessagesettings', 'opencl', self.settingsDialogInstance.ui.checkBoxOpenCL.currentText().toUtf8())
 
             acceptableDifficultyChanged = False
             
@@ -4082,14 +4082,18 @@ class settingsDialog(QtGui.QDialog):
             'bitmessagesettings', 'maxacceptablepayloadlengthextrabytes')) / shared.networkDefaultPayloadLengthExtraBytes)))
 
         # OpenCL
-        if openclpow.has_opencl():
+        if openclpow.openclAvailable():
-            self.ui.checkBoxOpenCL.setEnabled(True)
+            self.ui.comboBoxOpenCL.setEnabled(True)
         else:
-            self.ui.checkBoxOpenCL.setEnabled(False)
+            self.ui.comboBoxOpenCL.setEnabled(False)
-        if shared.safeConfigGetBoolean("bitmessagesettings", "opencl"):
+        self.ui.comboBoxOpenCL.clear()
-            self.ui.checkBoxOpenCL.setChecked(True)
+        self.ui.comboBoxOpenCL.addItem("None")
-        else:
+        self.ui.comboBoxOpenCL.addItems(openclpow.vendors)
-            self.ui.checkBoxOpenCL.setChecked(False)
+        self.ui.comboBoxOpenCL.setCurrentIndex(0)
+        for i in range(self.ui.comboBoxOpenCL.count()):
+            if self.ui.comboBoxOpenCL.itemText(i) == shared.safeConfigGet('bitmessagesettings', 'opencl'):
+                self.ui.comboBoxOpenCL.setCurrentIndex(i)
+                break
 
         # Namecoin integration tab
         nmctype = shared.config.get('bitmessagesettings', 'namecoinrpctype')

src/bitmessageqt/settings.py

@@ -298,9 +298,9 @@ class Ui_settingsDialog(object):
         self.labelOpenCL = QtGui.QLabel(self.tabMaxAcceptableDifficulty)
         self.labelOpenCL.setObjectName(_fromUtf8("labelOpenCL"))
         self.gridLayout_7.addWidget(self.labelOpenCL, 4, 0, 1, 1)
-        self.checkBoxOpenCL = QtGui.QCheckBox(self.tabMaxAcceptableDifficulty)
+        self.comboBoxOpenCL = QtGui.QComboBox(self.tabMaxAcceptableDifficulty)
-        self.checkBoxOpenCL.setObjectName = (_fromUtf8("checkBoxOpenCL"))
+        self.comboBoxOpenCL.setObjectName = (_fromUtf8("comboBoxOpenCL"))
-        self.gridLayout_7.addWidget(self.checkBoxOpenCL, 4, 1, 1, 1)
+        self.gridLayout_7.addWidget(self.comboBoxOpenCL, 4, 1, 1, 1)
         self.tabWidgetSettings.addTab(self.tabMaxAcceptableDifficulty, _fromUtf8(""))
         self.tabNamecoin = QtGui.QWidget()
         self.tabNamecoin.setObjectName(_fromUtf8("tabNamecoin"))
@@ -475,7 +475,7 @@ class Ui_settingsDialog(object):
         self.label_13.setText(_translate("settingsDialog", "Maximum acceptable total difficulty:", None))
         self.label_14.setText(_translate("settingsDialog", "Maximum acceptable small message difficulty:", None))
         self.tabWidgetSettings.setTabText(self.tabWidgetSettings.indexOf(self.tabMaxAcceptableDifficulty), _translate("settingsDialog", "Max acceptable difficulty", None))
-        self.labelOpenCL.setText(_translate("settingsDialog", "Hardware GPU acceleration (OpenCL)", None))
+        self.labelOpenCL.setText(_translate("settingsDialog", "Hardware GPU acceleration (OpenCL):", None))
         self.label_16.setText(_translate("settingsDialog", "<html><head/><body><p>Bitmessage can utilize a different Bitcoin-based program called Namecoin to make addresses human-friendly. For example, instead of having to tell your friend your long Bitmessage address, you can simply tell him to send a message to <span style=\" font-style:italic;\">test. </span></p><p>(Getting your own Bitmessage address into Namecoin is still rather difficult).</p><p>Bitmessage can use either namecoind directly or a running nmcontrol instance.</p></body></html>", None))
         self.label_17.setText(_translate("settingsDialog", "Host:", None))
         self.label_18.setText(_translate("settingsDialog", "Port:", None))

src/bitmessageqt/support.py

@@ -9,7 +9,7 @@ from debug import logger
 from foldertree import AccountMixin
 from helper_sql import *
 from l10n import getTranslationLanguage
-from openclpow import has_opencl
+from openclpow import openclAvailable, openclEnabled
 from proofofwork import bmpow
 from pyelliptic.openssl import OpenSSL
 import shared
@@ -107,7 +107,7 @@ def createSupportMessage(myapp):
     portablemode = "True" if shared.appdata == shared.lookupExeFolder() else "False"
     cpow = "True" if bmpow else "False"
     #cpow = QtGui.QApplication.translate("Support", cpow)
-    openclpow = "True" if shared.safeConfigGetBoolean('bitmessagesettings', 'opencl') and has_opencl() else "False"
+    openclpow = str(shared.safeConfigGet('bitmessagesettings', 'opencl')) if openclEnabled() else "None"
     #openclpow = QtGui.QApplication.translate("Support", openclpow)
     locale = getTranslationLanguage()
     try:

src/openclpow.py

@@ -5,7 +5,7 @@ import hashlib
 import random
 import os
 
-from shared import codePath, safeConfigGetBoolean, shutdown
+from shared import codePath, safeConfigGetBoolean, safeConfigGet, shutdown
 from debug import logger
 
 libAvailable = True
@@ -13,6 +13,8 @@ ctx = False
 queue = False
 program = False
 gpus = []
+enabledGpus = []
+vendors = []
 hash_dt = None
 
 try:
@@ -22,13 +24,20 @@ except:
     libAvailable = False
 
 def initCL():
-    global ctx, queue, program, gpus, hash_dt
+    global ctx, queue, program, gpus, hash_dt, vendors
     try:
         hash_dt = numpy.dtype([('target', numpy.uint64), ('v', numpy.str_, 73)])
+        try:
             for platform in cl.get_platforms():
                 gpus.extend(platform.get_devices(device_type=cl.device_type.GPU))
-        if (len(gpus) > 0):
+                if safeConfigGet("bitmessagesettings", "opencl") == platform.vendor:
-            ctx = cl.Context(devices=gpus)
+                    enabledGpus.extend(platform.get_devices(device_type=cl.device_type.GPU))
+                if platform.vendor not in vendors:
+                    vendors.append(platform.vendor)
+        except:
+            pass
+        if (len(enabledGpus) > 0):
+            ctx = cl.Context(devices=enabledGpus)
             queue = cl.CommandQueue(ctx)
             f = open(os.path.join(codePath(), "bitmsghash", 'bitmsghash.cl'), 'r')
             fstr = ''.join(f.readlines())
@@ -36,20 +45,24 @@ def initCL():
             logger.info("Loaded OpenCL kernel")
         else:
             logger.info("No OpenCL GPUs found")
-            ctx = False
+            enabledGpus = []
     except Exception as e:
         logger.error("OpenCL fail: ", exc_info=True)
-        ctx = False
+        enabledGpus = []
 
-def has_opencl():
+def openclAvailable():
-	global ctx
+    global gpus
-	return (ctx != False)
+    return (len(gpus) > 0)
+
+def openclEnabled():
+    global enabledGpus
+    return (len(enabledGpus) > 0)
 
 def do_opencl_pow(hash, target):
-	global ctx, queue, program, gpus, hash_dt
+    global ctx, queue, program, enabledGpus, hash_dt
 
     output = numpy.zeros(1, dtype=[('v', numpy.uint64, 1)])
-	if (ctx == False):
+    if (len(enabledGpus) == 0):
         return output[0][0]
 
     data = numpy.zeros(1, dtype=hash_dt, order='C')
@@ -60,7 +73,7 @@ def do_opencl_pow(hash, target):
     dest_buf = cl.Buffer(ctx, cl.mem_flags.WRITE_ONLY, output.nbytes)
 
     kernel = program.kernel_sha512
-	worksize = kernel.get_work_group_info(cl.kernel_work_group_info.WORK_GROUP_SIZE, gpus[0])
+    worksize = kernel.get_work_group_info(cl.kernel_work_group_info.WORK_GROUP_SIZE, enabledGpus[0])
 
     kernel.set_arg(0, hash_buf)
     kernel.set_arg(1, dest_buf)

src/proofofwork.py

@@ -108,10 +108,10 @@ def _doGPUPoW(target, initialHash):
     trialValue, = unpack('>Q',hashlib.sha512(hashlib.sha512(pack('>Q',nonce) + initialHash).digest()).digest()[0:8])
     #print "{} - value {} < {}".format(nonce, trialValue, target)
     if trialValue > target:
-        deviceNames = ", ".join(gpu.name for gpu in openclpow.gpus)
+        deviceNames = ", ".join(gpu.name for gpu in openclpow.enabledGpus)
         shared.UISignalQueue.put(('updateStatusBar', tr._translate("MainWindow",'Your GPU(s) did not calculate correctly, disabling OpenCL. Please report to the developers.')))
         logger.error("Your GPUs (%s) did not calculate correctly, disabling OpenCL. Please report to the developers.", deviceNames)
-        openclpow.ctx = False
+        openclpow.enabledGpus = []
         raise Exception("GPU did not calculate correctly.")
     if shared.shutdown != 0:
         raise StopIteration("Interrupted")
@@ -144,7 +144,7 @@ def estimate(difficulty, format = False):
         return ret
 
 def getPowType():
-    if shared.safeConfigGetBoolean('bitmessagesettings', 'opencl') and openclpow.has_opencl():
+    if openclpow.openclEnabled():
         return "OpenCL"
     if bmpow:
         return "C"
@@ -154,7 +154,7 @@ def run(target, initialHash):
     if shared.shutdown != 0:
         raise
     target = int(target)
-    if shared.safeConfigGetBoolean('bitmessagesettings', 'opencl') and openclpow.has_opencl():
+    if openclpow.openclEnabled():
 #        trialvalue1, nonce1 = _doGPUPoW(target, initialHash)
 #        trialvalue, nonce = _doFastPoW(target, initialHash)
 #        print "GPU: %s, %s" % (trialvalue1, nonce1)