Changeset ff7119b in sasmodels for sasmodels/alignment.py

Timestamp:

Aug 26, 2014 10:27:06 PM (10 years ago)

Author:

Paul Kienzle <pkienzle@…>

Branches:

master, core_shell_microgels, costrafo411, magnetic_model, release_v0.94, release_v0.95, ticket-1257-vesicle-product, ticket_1156, ticket_1265_superball, ticket_822_more_unit_tests

Children:

5d4777d

Parents:

a7684e5

Message:

docu update

File:

• sasmodels/alignment.py (modified) (4 diffs)

sasmodels/alignment.py

@@ -3 +3 @@
 
 Some web sites say that maximizing performance for OpenCL code requires
-aligning data on certain memory boundaries.
+aligning data on certain memory boundaries.  The following functions
+provide this service:
 
-:func:`data_alignment` queries all devices in the OpenCL context, returning
-the most restrictive alignment.
+:func:`align_data` aligns an existing array, returning a new array of the
+correct alignment.
 
-:func:`align_data` aligns an existing array.
+:func:`align_empty` to create an empty array of the correct alignment.
 
-:func:`align_empty` to create a new array of the correct alignment.
+Set alignment to :func:`gpu.environment()` attribute *boundary*.
 
 Note:  This code is unused. So far, tests have not demonstrated any
@@ -17 +18 @@
 to decide whether it is really required.
 """
-
 import numpy as np
-import pyopencl as cl
-
-def data_alignment(context):
-    """
-    Return the desired byte alignment across all devices.
-    """
-    # Note: rely on the fact that alignment will be 2^k
-    return max(d.min_data_type_align_size for d in context.devices)
 
 def align_empty(shape, dtype, alignment=128):
+    """
+    Return an empty array aligned on the alignment boundary.
+    """
     size = np.prod(shape)
     dtype = np.dtype(dtype)
@@ -40 +35 @@
 
 def align_data(v, dtype, alignment=128):
+    """
+    Return a copy of an array on the alignment boundary.
+    """
     # if v is contiguous, aligned, and of the correct type then just return v
     view = align_empty(v.shape, dtype, alignment=alignment)
@@ -45 +43 @@
     return view
 
-def work_group_size(context, kernel):
-    """
-    Return the desired work group size for the context.
-    """
-    max(kernel.get_work_group_info(cl.kernel_work_group_info.PREFERRED_WORK_GROUP_SIZE_MULTIPLE, d)
-        for d in context.devices)
-
-