Liu 128

daliuge-engine/dlg/apps/crc.py

@@ -28,7 +28,7 @@
 from ..meta import dlg_component, dlg_batch_input, dlg_batch_output, dlg_streaming_input
 
 try:
-    from crc32c import crc32c  # @UnusedImport
+    from crc32c import crc32c as crc32  # @UnusedImport
 except:
     from binascii import crc32  # @Reimport
 
@@ -63,7 +63,7 @@ def run(self):
         buf = inputDrop.read(desc, bufsize)
         crc = 0
         while buf:
-            crc = crc32c(buf, crc)
+            crc = crc32(buf, crc)
             buf = inputDrop.read(desc, bufsize)
         inputDrop.close(desc)
 
@@ -102,7 +102,7 @@ def initialize(self, **kwargs):
 
     def dataWritten(self, uid, data):
         self.execStatus = AppDROPStates.RUNNING
-        self._crc = crc32c(data, self._crc)
+        self._crc = crc32(data, self._crc)
 
     def dropCompleted(self, uid, status):
         outputDrop = self.outputs[0]

daliuge-engine/dlg/apps/simple.py

@@ -21,6 +21,7 @@
 #
 """Applications used as examples, for testing, or in simple situations"""
 import pickle
+import random
 import urllib.error
 import urllib.request
 
@@ -256,7 +257,10 @@ class AverageArraysApp(BarrierAppDROP):
     # default values
     methods = ["mean", "median"]
     method = dlg_string_param("method", methods[0])
-    marray = []
+
+    def __init__(self, oid, uid, **kwargs):
+        super().__init__(oid, kwargs)
+        self.marray = []
 
     def initialize(self, **kwargs):
         super(AverageArraysApp, self).initialize(**kwargs)
@@ -268,9 +272,9 @@ def run(self):
         if len(outs) < 1:
             raise Exception("At least one output should have been added to %r" % self)
         self.getInputArrays()
-        avg = self.averageArray()
+        self._avg = self.averageArray()
         for o in outs:
-            d = pickle.dumps(avg)
+            d = pickle.dumps(self._avg)
             o.len = len(d)
             o.write(d)  # average across inputs
 
@@ -283,8 +287,14 @@ def getInputArrays(self):
         ins = self.inputs
         if len(ins) < 1:
             raise Exception("At least one input should have been added to %r" % self)
-
-        marray = [pickle.loads(droputils.allDropContents(inp)) for inp in ins]
+        marray = []
+        for inp in ins:
+            sarray = droputils.allDropContents(inp)
+            if len(sarray) == 0:
+                print(f"Input does not contain data!")
+            else:
+                sarray = pickle.loads(sarray)
+                marray.extend(sarray)
         self.marray = marray
 
     def averageArray(self):
@@ -462,3 +472,66 @@ def run(self):
 
     def condition(self):
         return self.result
+
+
+
+##
+# @brief ListAppendThrashingApp\n
+# @details A testing APP that appends a random integer to a list num times.
+# This is a CPU intensive operation and can thus be used to provide a test for application threading
+# since this operation will not yield.
+# The resulting array will be sent to all connected output apps.
+# @par EAGLE_START
+# @param gitrepo $(GIT_REPO)
+# @param version $(PROJECT_VERSION)
+# @param category PythonApp
+# @param[in] param/size/100/Integer/readwrite
+#     \~English the size of the array\n
+# @param[in] param/appclass/dlg.apps.simple.ListAppendThrashingApp/String/readonly
+#     \~English Application class\n
+# @param[out] port/array
+#     \~English Port carrying the random array.
+# @par EAGLE_END
+class ListAppendThrashingApp(BarrierAppDROP):
+    """
+    A BarrierAppDrop that appends random integers to a list N times. It does
+    not require any inputs and writes the generated array to all of its
+    outputs.
+
+    Keywords:
+
+    size:     int, number of array elements
+    """
+    compontent_meta = dlg_component('ListAppendThrashingApp', 'List Append Thrashing',
+                                    [dlg_batch_input('binary/*', [])],
+                                    [dlg_batch_output('binary/*', [])],
+                                    [dlg_streaming_input('binary/*')])
+
+    def initialize(self, **kwargs):
+        self.size = self._getArg(kwargs, 'size', 100)
+        self.marray = []
+        super(ListAppendThrashingApp, self).initialize(**kwargs)
+
+    def run(self):
+        # At least one output should have been added
+        outs = self.outputs
+        if len(outs) < 1:
+            raise Exception(
+                'At least one output should have been added to %r' % self)
+        self.marray = self.generateArray()
+        for o in outs:
+            d = pickle.dumps(self.marray)
+            o.len = len(d)
+            o.write(pickle.dumps(self.marray))
+
+    def generateArray(self):
+        # This operation is wasteful to simulate an N^2 operation.
+        marray = []
+        for _ in range(int(self.size)):
+            marray = []
+            for i in range(int(self.size)):
+                marray.append(random.random())
+        return marray
+
+    def _getArray(self):
+        return self.marray

daliuge-engine/dlg/drop.py

@@ -40,6 +40,7 @@
 import threading
 import time
 import re
+import sys
 import inspect
 import binascii
 
@@ -67,7 +68,12 @@
     PlasmaIO,
     PlasmaFlightIO,
 )
+if sys.version_info >= (3, 8):
+    from .io import SharedMemoryIO
 from .utils import prepare_sql, createDirIfMissing, isabs, object_tracking
+from .meta import dlg_float_param, dlg_int_param, dlg_list_param, \
+    dlg_string_param, dlg_bool_param, dlg_dict_param
+from dlg.process import DlgProcess
 from .meta import (
     dlg_float_param,
     dlg_int_param,
@@ -634,6 +640,15 @@ def checksum(self):
 
         :see: `self.checksumType`
         """
+        if self.status == DROPStates.COMPLETED and self._checksum is None:
+            # Generate on the fly
+            io = self.getIO()
+            io.open(OpenMode.OPEN_READ)
+            data = io.read(4096)
+            while data is not None and len(data) > 0:
+                self._updateChecksum(data)
+                data = io.read(4096)
+            io.close()
         return self._checksum
 
     @checksum.setter
@@ -1416,7 +1431,10 @@ def initialize(self, **kwargs):
         self._buf = io.BytesIO(*args)
 
     def getIO(self):
-        return MemoryIO(self._buf)
+        if hasattr(self, '_tp') and hasattr(self, '_sessID') and sys.version_info >= (3, 8):
+            return SharedMemoryIO(self.oid, self._sessID)
+        else:
+            return MemoryIO(self._buf)
 
     @property
     def dataURL(self):
@@ -1986,7 +2004,14 @@ def execute(self, _send_notifications=True):
         self.execStatus = AppDROPStates.RUNNING
         while tries < self.n_tries:
             try:
-                self.run()
+                if hasattr(self, '_tp'):
+                    proc = DlgProcess(target=self.run, daemon=True)
+                    proc.start()
+                    proc.join()
+                    if proc.exception:
+                        raise proc.exception
+                else:
+                    self.run()
                 if self.execStatus == AppDROPStates.CANCELLED:
                     return
                 self.execStatus = AppDROPStates.FINISHED

daliuge-engine/dlg/droputils.py

@@ -141,7 +141,8 @@ def copyDropContents(source, target, bufsize=4096):
         target.write(buf)
         logger.debug(f"Wrote {len(buf)} bytes to {repr(target)}")
         buf = source.read(desc, bufsize)
-        logger.debug(f"Read {len(buf)} bytes from {repr(source)}")
+        if buf is not None:
+            logger.debug(f"Read {len(buf)} bytes from {repr(source)}")
     source.close(desc)
 
 

daliuge-engine/dlg/io.py

@@ -24,15 +24,18 @@
 import io
 import logging
 import os
+import sys
 import urllib.parse
-
+from abc import abstractmethod, ABCMeta
 from typing import Optional, Union
 
 from . import ngaslite
 from .apps.plasmaflight import PlasmaFlightClient
 
 import pyarrow
 import pyarrow.plasma as plasma
+if sys.version_info >= (3, 8):
+    from dlg.shared_memory import DlgSharedMemory
 
 
 logger = logging.getLogger(__name__)
@@ -219,9 +222,10 @@ class MemoryIO(DataIO):
     A DataIO class that reads/write from/into the BytesIO object given at
     construction time
     """
-    _desc: io.BytesIO
+    _desc: io.BytesIO  # TODO: This might actually be a problem
 
     def __init__(self, buf: io.BytesIO, **kwargs):
+        super().__init__()
         self._buf = buf
 
     def _open(self, **kwargs):
@@ -257,9 +261,70 @@ def delete(self):
 
     @overrides
     def buffer(self) -> memoryview:
+        #  TODO: This may also be an issue
         return self._open().getbuffer()
 
 
+
+class SharedMemoryIO(DataIO):
+    """
+    A DataIO class that writes to a shared memory buffer
+    """
+
+    def __init__(self, uid, session_id, **kwargs):
+        super().__init__()
+        self._name = f'{session_id}_{uid}'
+        self._written = 0
+        self._pos = 0
+        self._buf = None
+
+    def _open(self, **kwargs):
+        self._pos = 0
+        if self._buf is None:
+            if self._mode == OpenMode.OPEN_WRITE:
+                self._written = 0
+            self._buf = DlgSharedMemory(self._name)
+        return self._buf
+
+    def _write(self, data, **kwargs):
+        total_size = len(data) + self._written
+        if total_size > self._buf.size:
+            self._buf.resize(total_size)
+            self._buf.buf[self._written:total_size] = data
+            self._written = total_size
+        else:
+            self._buf.buf[self._written:total_size] = data
+            self._written = total_size
+            self._buf.resize(total_size)
+            """
+            It may be inefficient to resize many times, but assuming data is written 'once' this is
+            might be tolerable and guarantees that the size of the underlying buffer is tight.
+            """
+        return len(data)
+
+    def _read(self, count=4096, **kwargs):
+        if self._pos == self._buf.size:
+            return None
+        start = self._pos
+        end = self._pos + count
+        end = min(end, self._buf.size)
+        out = self._buf.buf[start:end]
+        self._pos = end
+        return out
+
+    def _close(self, **kwargs):
+        if self._mode == OpenMode.OPEN_WRITE:
+            self._buf.resize(self._written)
+        self._buf.close()
+        self._buf = None
+
+    def exists(self):
+        return self._buf is not None
+
+    def delete(self):
+        self._close()
+
+
 class FileIO(DataIO):
     _desc: io.BufferedReader
     def __init__(self, filename, **kwargs):

daliuge-engine/dlg/manager/cmdline.py

@@ -369,7 +369,7 @@ def dlgNM(parser, args):
         action="store",
         type="int",
         dest="max_threads",
-        help="Max thread pool size used for executing drops. 0 (default) means no pool.",
+        help="Max thread pool size used for executing drops. -1 means use all CPUs. 0 (default) means no threads.",
         default=0,
     )
     (options, args) = parser.parse_args(args)