June 26-30, 2023
Prague, Czech Republic + Virtual
View More Details & Registration
Note: The schedule is subject to change.

The Sched app allows you to build your schedule but is not a substitute for your event registration. You must be registered for Embedded Open Source Summit 2023 to participate in the sessions. If you have not registered but would like to join us, please go to the event registration page to purchase a registration.

This schedule is automatically displayed in Central European Summer Time (UTC/GMT +2). To see the schedule in your preferred timezone, please select from the drop-down menu to the right, above "Filter by Date."

IMPORTANT NOTE: Timing of sessions and room locations are subject to change.

Monday, June 26 • 12:00 - 12:10
(Virtual) Lightning Talk: Tokenized Logging with Pigweed - Al Semjonovs, Google

Sign up or log in to save this to your schedule, view media, leave feedback and see who's attending!

Feedback form is now closed.
For space saving, Zephyr’s logging subsystem can be enabled to provide a dictionary based logging system. This creates a JSON database file in the build directory which contains information to correctly parse log data.  This database file only works with the build it's generated with.  Other builds cannot use the same database file as strings are mapped to their address.  At Google, we’re opting to use Pigweeds (PW) tokenizer logging module.  Instead of mapping strings to addresses, PW tokenizer maps strings to a hash.  When log format strings stay the same between builds, the hash stays the same. Any new strings are appended to the hash database. Addresses are almost entirely unpredictable between builds.  This reduces friction for developers in viewing logs when making changes while also reducing image size. We’re working on making pigweed as an additional Zephyr module which can be linked in with KConfig options. The hash database will be updated and stored as an artifact of each build.


Al Semjonovs

Software Engineer, Google
I'm a software engineer from Google working on the ChromeOS embedded controller.  Over the past year, I've helped with creating a test framework within Zephyr RTOS.

Monday June 26, 2023 12:00 - 12:10 CEST
  Zephyr Project Developer Summit, Developer/Logging