This project contains the MLPerf mobile app, an app-based implementationn of MLPerf Inference tasks.

The MLPerf app offers a simple mobile UI for executing MLPerf inference tasks and comparing results. The user can select a task, a supported reference model (float or quantized), and initiate both latency and accuracy validation for that task. As single-stream represents the most common inference execution on mobile devices, that is the default mode of inference measurement, with the results showing the 90%-ile latency and the task-specific accuracy metric result (e.g., top-1 accuracy for image classification).

Several important mobile-specific considerations are addressed in the app:

• Limited disk space - Certain datasets are quite large (multiple gigabytes), which makes an exhaustive evaluation difficult. By default, the app does not include the full dataset for validation. The client can optionally push part or all of the task validation datasets, depending on their use-case.
• Device variability - The number of CPU, GPU and DSP/NPU hardware permutations in the mobile ecosystem is quite large. To this end, the app affords the option to customize hardware execution, e.g., adjusting the number of threads for CPU inference, enabling GPU acceleration, or NN API acceleration (Android’s ML abstraction layer for accelerating inference).

The initial version of the app builds off of a lightweight, C++ task evaluation pipeline originally built for TensorFlow Lite. Most of the default MLPerf inference reference implementations are built in Python, which is generally incompatible with mobile deployment. This C++ evaluation pipeline has a minimal set of dependencies for pre-processing datasets and post-processing, is compatible with iOS and Android (as well as desktop platforms), and integrates with the standard MLPerf LoadGen library. While the initial version of the app uses TensorFlow Lite as the default inference engine, the plan is to support addition of alternative inference frameworks contributed by the broader MLPerf community.

• android - Contains the Android version of the app
• mobile_back_qti - QTI backend for Android
• mobile_back_samsung - Samsung backend for Android
• mobile_back_pixel - Google Pixel backend for Android
• mobile_back_tflite - Combined TFLite / MediaTek backends for Android