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Use USMHost as underlying buffer for result #1026

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Merged
merged 1 commit into from
Dec 26, 2022
Merged

Use USMHost as underlying buffer for result #1026

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5 changes: 4 additions & 1 deletion dpctl/tensor/_copy_utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -46,7 +46,10 @@ def _has_memory_overlap(x1, x2):
def _copy_to_numpy(ary):
if not isinstance(ary, dpt.usm_ndarray):
raise TypeError
h = ary.usm_data.copy_to_host().view(ary.dtype)
nb = ary.usm_data.nbytes
hh = dpm.MemoryUSMHost(nb, queue=ary.sycl_queue)
hh.copy_from_device(ary.usm_data)
h = np.ndarray(nb, dtype="u1", buffer=hh).view(ary.dtype)
itsz = ary.itemsize
strides_bytes = tuple(si * itsz for si in ary.strides)
offset = ary.__sycl_usm_array_interface__.get("offset", 0) * itsz
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