Error running systrace tool in ADB using a Jelly Bean 4.1 emulator on Windows 7

The systrace python script uses the select() system call, and that doesn’t work on Windows.
The latest preview (ADT21 rc9) of the Android SDK tools include support for collecting system trace from within the monitor tool.

Launch monitor as:

./tools/monitor &

Click on a device, and at the top right of the device panel, you should have an toolbar itemn that allows you to collect system trace.

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