| 111 | } |
| 112 | |
| 113 | Status XlaCompileOnDemandOp::Compile( |
| 114 | OpKernelContext* ctx, const XlaDevice::Metadata& metadata, |
| 115 | const XlaCompiler::CompilationResult** result, |
| 116 | xla::LocalExecutable** executable) { |
| 117 | std::map<int, Tensor> constant_arguments; |
| 118 | for (int64 i = 0; i < ctx->num_inputs(); ++i) { |
| 119 | const Tensor& device_tensor = ctx->input(i); |
| 120 | if (const XlaTensor* xla_tensor = XlaTensor::FromTensor(&device_tensor)) { |
| 121 | if (xla_tensor->has_host_tensor()) { |
| 122 | bool should_arg_be_const; |
| 123 | TF_RETURN_IF_ERROR(ShouldArgumentBeConstant(&ctx->op_kernel(), i, |
| 124 | ctx->function_library(), |
| 125 | &should_arg_be_const)); |
| 126 | if (should_arg_be_const) { |
| 127 | constant_arguments[i] = xla_tensor->host_tensor(); |
| 128 | } |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | if (constant_arguments.count(i) == 0) { |
| 133 | bool must_argument_be_const; |
| 134 | TF_RETURN_IF_ERROR(MustArgumentBeConstant(&ctx->op_kernel(), i, |
| 135 | ctx->function_library(), |
| 136 | &must_argument_be_const)); |
| 137 | |
| 138 | if (must_argument_be_const) { |
| 139 | // Slow path; the argument is not available as a host constant so we |
| 140 | // must fetch it synchronously. |
| 141 | Tensor host_tensor; |
| 142 | AllocatorAttributes attrs; |
| 143 | attrs.set_on_host(true); |
| 144 | TF_RETURN_IF_ERROR(ctx->allocate_temp( |
| 145 | device_tensor.dtype(), device_tensor.shape(), &host_tensor, attrs)); |
| 146 | Notification n; |
| 147 | Status status; |
| 148 | ctx->op_device_context()->CopyDeviceTensorToCPU( |
| 149 | &device_tensor, "ConstantArgument", |
| 150 | reinterpret_cast<Device*>(ctx->device()), &host_tensor, |
| 151 | [&](Status s) { |
| 152 | status = s; |
| 153 | n.Notify(); |
| 154 | }); |
| 155 | n.WaitForNotification(); |
| 156 | if (!status.ok()) { |
| 157 | LOG(ERROR) << "Copying tensor of shape " |
| 158 | << device_tensor.shape().DebugString() << " from " |
| 159 | << ctx->device()->name() << "to CPU failed with " |
| 160 | << status.ToString(); |
| 161 | return status; |
| 162 | } |
| 163 | constant_arguments[i] = host_tensor; |
| 164 | } |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | // We store information about the JIT-compiled XLA computation |
| 169 | // in the ResourceMgr. |
| 170 | ResourceMgr* rm = ctx->resource_manager(); |
nothing calls this directly
no test coverage detected