tqchen commented on a change in pull request #7488:
URL: https://github.com/apache/tvm/pull/7488#discussion_r581574952
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File path: src/runtime/c_runtime_api.cc
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@@ -144,6 +144,46 @@ void* DeviceAPI::AllocWorkspace(TVMContext ctx, size_t
size, DLDataType type_hin
return AllocDataSpace(ctx, size, kTempAllocaAlignment, type_hint);
}
+static size_t GetDataAlignment(const DLDataType dtype) {
+ size_t align = (dtype.bits / 8) * dtype.lanes;
+ if (align < kAllocAlignment) return kAllocAlignment;
+ return align;
+}
+
+void* DeviceAPI::AllocDataSpace(TVMContext ctx, int ndim, const int64_t*
shape, DLDataType dtype,
+ Optional<String> mem_scope) {
+ if (!mem_scope.defined() || mem_scope.value() == "global") {
+ // by default, we can always redirect to the flat memory allocations
+ DLTensor temp;
+ temp.data = nullptr;
+ temp.ctx = ctx;
+ temp.ndim = ndim;
+ temp.dtype = dtype;
+ temp.shape = const_cast<int64_t*>(shape);
+ temp.strides = nullptr;
+ temp.byte_offset = 0;
+ size_t size = GetDataSize(temp);
+ size_t alignment = GetDataAlignment(temp.dtype);
+ return AllocDataSpace(ctx, size, alignment, dtype);
+ }
+ LOG(FATAL) << "Device does not support allocate data space with "
+ << "specified memory scope: " << mem_scope.value();
+ return nullptr;
+}
+
+void DeviceAPI::CopyDataFromTo(DLTensor* from, DLTensor* to, TVMStreamHandle
stream) {
+ // by default, we can always redirect to the flat memory copy operation.
+ size_t nbytes = GetDataSize(*from);
Review comment:
CHECK both from and to are contiguous
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