| /* |
| * Copyright (c) 2019-2020 Arm Limited. All rights reserved. |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Licensed under the Apache License, Version 2.0 (the License); you may |
| * not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an AS IS BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "tensorflow/lite/micro/all_ops_resolver.h" |
| #include "tensorflow/lite/micro/micro_error_reporter.h" |
| #include "tensorflow/lite/micro/micro_interpreter.h" |
| #include "tensorflow/lite/schema/schema_generated.h" |
| #include "tensorflow/lite/version.h" |
| |
| #include "inference_process.hpp" |
| |
| #ifndef TENSOR_ARENA_SIZE |
| #define TENSOR_ARENA_SIZE (1024) |
| #endif |
| |
| __attribute__((section(".bss.NoInit"), aligned(16))) uint8_t inferenceProcessTensorArena[TENSOR_ARENA_SIZE]; |
| |
| namespace { |
| void print_output_data(TfLiteTensor *output, size_t bytesToPrint) { |
| const int numBytesToPrint = std::min(output->bytes, bytesToPrint); |
| |
| int dims_size = output->dims->size; |
| printf("{\n"); |
| printf("\"dims\": [%d,", dims_size); |
| for (int i = 0; i < output->dims->size - 1; ++i) { |
| printf("%d,", output->dims->data[i]); |
| } |
| printf("%d],\n", output->dims->data[dims_size - 1]); |
| |
| printf("\"data_address\": \"%08x\",\n", (uint32_t)output->data.data); |
| printf("\"data\":\""); |
| for (int i = 0; i < numBytesToPrint - 1; ++i) { |
| if (i % 16 == 0 && i != 0) { |
| printf("\n"); |
| } |
| printf("0x%02x,", output->data.uint8[i]); |
| } |
| printf("0x%02x\"\n", output->data.uint8[numBytesToPrint - 1]); |
| printf("}"); |
| } |
| |
| bool copyOutput(const TfLiteTensor &src, InferenceProcess::DataPtr &dst) { |
| if (dst.data == nullptr) { |
| return false; |
| } |
| |
| if (src.bytes > dst.size) { |
| printf("Tensor size %d does not match output size %d.\n", src.bytes, dst.size); |
| return true; |
| } |
| |
| std::copy(src.data.uint8, src.data.uint8 + src.bytes, static_cast<uint8_t *>(dst.data)); |
| dst.size = src.bytes; |
| |
| return false; |
| } |
| |
| } // namespace |
| |
| namespace InferenceProcess { |
| DataPtr::DataPtr(void *data, size_t size) : data(data), size(size) {} |
| |
| InferenceJob::InferenceJob() : numBytesToPrint(0) {} |
| |
| InferenceJob::InferenceJob(const std::string &name, |
| const DataPtr &networkModel, |
| const DataPtr &input, |
| const DataPtr &output, |
| const DataPtr &expectedOutput, |
| size_t numBytesToPrint) : |
| name(name), |
| networkModel(networkModel), input(input), output(output), expectedOutput(expectedOutput), |
| numBytesToPrint(numBytesToPrint) {} |
| |
| InferenceProcess::InferenceProcess() : lock(0) {} |
| |
| // NOTE: Adding code for get_lock & free_lock with some corrections from |
| // http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dai0321a/BIHEJCHB.html |
| // TODO: check correctness? |
| void InferenceProcess::getLock() { |
| int status = 0; |
| |
| do { |
| // Wait until lock_var is free |
| while (__LDREXW(&lock) != 0) |
| ; |
| |
| // Try to set lock_var |
| status = __STREXW(1, &lock); |
| } while (status != 0); |
| |
| // Do not start any other memory access until memory barrier is completed |
| __DMB(); |
| } |
| |
| // TODO: check correctness? |
| void InferenceProcess::freeLock() { |
| // Ensure memory operations completed before releasing lock |
| __DMB(); |
| |
| lock = 0; |
| } |
| |
| bool InferenceProcess::push(const InferenceJob &job) { |
| getLock(); |
| inferenceJobQueue.push(job); |
| freeLock(); |
| |
| return true; |
| } |
| |
| bool InferenceProcess::runJob(InferenceJob &job) { |
| printf("Running inference job: %s\n", job.name.c_str()); |
| |
| tflite::MicroErrorReporter microErrorReporter; |
| tflite::ErrorReporter *reporter = µErrorReporter; |
| |
| const tflite::Model *model = ::tflite::GetModel(job.networkModel.data); |
| if (model->version() != TFLITE_SCHEMA_VERSION) { |
| printf("Model provided is schema version %d not equal " |
| "to supported version %d.\n", |
| model->version(), |
| TFLITE_SCHEMA_VERSION); |
| return true; |
| } |
| |
| tflite::AllOpsResolver resolver; |
| |
| tflite::MicroInterpreter interpreter(model, resolver, inferenceProcessTensorArena, TENSOR_ARENA_SIZE, reporter); |
| |
| TfLiteStatus allocate_status = interpreter.AllocateTensors(); |
| if (allocate_status != kTfLiteOk) { |
| printf("AllocateTensors failed for inference job: %s\n", job.name.c_str()); |
| return true; |
| } |
| |
| bool inputSizeError = false; |
| // TODO: adapt for multiple inputs |
| // for (unsigned int i = 0; i < interpreter.inputs_size(); ++i) |
| for (unsigned int i = 0; i < 1; ++i) { |
| TfLiteTensor *input = interpreter.input(i); |
| if (input->bytes != job.input.size) { |
| // If input sizes don't match, then we could end up copying |
| // uninitialized or partial data. |
| inputSizeError = true; |
| printf("Allocated size: %d for input: %d doesn't match the " |
| "received input size: %d for job: %s\n", |
| input->bytes, |
| i, |
| job.input.size, |
| job.name.c_str()); |
| return true; |
| } |
| memcpy(input->data.uint8, job.input.data, input->bytes); |
| } |
| if (inputSizeError) { |
| return true; |
| } |
| |
| TfLiteStatus invoke_status = interpreter.Invoke(); |
| if (invoke_status != kTfLiteOk) { |
| printf("Invoke failed for inference job: %s\n", job.name.c_str()); |
| return true; |
| } |
| |
| copyOutput(*interpreter.output(0), job.output); |
| |
| if (job.numBytesToPrint > 0) { |
| // Print all of the output data, or the first NUM_BYTES_TO_PRINT bytes, |
| // whichever comes first as well as the output shape. |
| printf("num_of_outputs: %d\n", interpreter.outputs_size()); |
| printf("output_begin\n"); |
| printf("[\n"); |
| for (unsigned int i = 0; i < interpreter.outputs_size(); i++) { |
| TfLiteTensor *output = interpreter.output(i); |
| print_output_data(output, job.numBytesToPrint); |
| if (i != interpreter.outputs_size() - 1) { |
| printf(",\n"); |
| } |
| } |
| printf("]\n"); |
| printf("output_end\n"); |
| } |
| |
| if (job.expectedOutput.data != nullptr) { |
| bool outputSizeError = false; |
| // TODO: adapt for multiple outputs |
| // for (unsigned int i = 0; i < interpreter.outputs_size(); i++) |
| for (unsigned int i = 0; i < 1; i++) { |
| TfLiteTensor *output = interpreter.output(i); |
| if (job.expectedOutput.size != output->bytes) { |
| // If the expected output & the actual output size doesn't |
| // match, we could end up accessing out-of-bound data. |
| // Also there's no need to compare the data, as we know |
| // that sizes differ. |
| outputSizeError = true; |
| printf("Output size: %d for output: %d doesn't match with " |
| "the expected output size: %d for job: %s\n", |
| output->bytes, |
| i, |
| job.expectedOutput.size, |
| job.name.c_str()); |
| return true; |
| } |
| for (unsigned int j = 0; j < output->bytes; ++j) { |
| if (output->data.uint8[j] != (static_cast<uint8_t *>(job.expectedOutput.data))[j]) { |
| printf("Output data doesn't match expected output data at index: " |
| "%d, expected: %02X actual: %02X", |
| j, |
| (static_cast<uint8_t *>(job.expectedOutput.data))[j], |
| output->data.uint8[j]); |
| } |
| } |
| } |
| if (outputSizeError) { |
| return true; |
| } |
| } |
| printf("Finished running job: %s\n", job.name.c_str()); |
| |
| return false; |
| } |
| |
| bool InferenceProcess::run(bool exitOnEmpty) { |
| bool anyJobFailed = false; |
| |
| while (true) { |
| getLock(); |
| bool empty = inferenceJobQueue.empty(); |
| freeLock(); |
| |
| if (empty) { |
| if (exitOnEmpty) { |
| printf("Exit from InferenceProcess::run() on empty job queue!\n"); |
| break; |
| } |
| |
| continue; |
| } |
| |
| getLock(); |
| InferenceJob job = inferenceJobQueue.front(); |
| inferenceJobQueue.pop(); |
| freeLock(); |
| |
| if (runJob(job)) { |
| anyJobFailed = true; |
| continue; |
| } |
| } |
| |
| return anyJobFailed; |
| } |
| |
| } // namespace InferenceProcess |