An extremely accurate Android method tracing tool.
Nanoscope is a method tracing tool optimized for extreme accuracy. The tool's overhead has been measured at around ~20 nanoseconds per method (on a Nexus 6P). To achieve this performance, the interesting pieces of Nanoscope are implemented as a fork of AOSP. For this reason, you'll need a device running the Nanoscope OS in order to make use of this tool. The entrypoint for provisioning a device with the custom OS and starting/stopping tracing is the nanoscope command-line tool described below.
For more information on motivation and architecture, check out the wiki.
Install the nanoscope command
$ brew tap uber/nanoscope
$ brew install nanoscopeFlash ADB-connected phone with the Nanoscope OS
IMPORTANT: This will only work with a Nexus 6P - do not attempt to flash any other device
IMPORTANT: This command installs a custom operating system onto the device. There is no way to undo this operation.
$ nanoscope flashStart tracing on ADB-connected device
$ nanoscope start
Tracing... (Press ENTER to stop)Client
$ brew upgrade nanoscope
OS
$ brew upgrade nanoscope
$ nanoscope flash
Copyright (C) 2017 Uber Technologies
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
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