junrushao1994 commented on a change in pull request #7488:
URL: https://github.com/apache/tvm/pull/7488#discussion_r583992985
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File path: src/runtime/c_runtime_api.cc
##########
@@ -144,6 +144,48 @@ 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);
+ ICHECK_EQ(nbytes, GetDataSize(*to));
+ ICHECK(from->strides == nullptr && to->strides == nullptr);
Review comment:
Not sure...Do we want to CHECK or ICHECK here?
##########
File path: src/runtime/crt/common/crt_runtime_api.c
##########
@@ -87,16 +87,33 @@ int TVMDeviceAllocDataSpace(DLContext ctx, size_t nbytes,
size_t alignment, DLDa
if (alignment != 1) {
nbytes = (nbytes + alignment - 1) / alignment * alignment;
}
-
return TVMPlatformMemoryAllocate(nbytes, ctx, out_data);
}
+int TVMDeviceAllocDataSpaceWithScope(DLContext ctx, int ndim, const int64_t*
shape,
+ DLDataType dtype, const char* mem_scope,
void** out_data) {
+ size_t nbytes = 1;
+ for (int i = 0; i < ndim; ++i) {
+ nbytes *= shape[i];
+ }
+ nbytes *= (dtype.bits * dtype.lanes + 7) / 8;
+
+ int kAllocAlignment = 128;
Review comment:
nitpick: let's mark it as constexpr
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