Skia Swarming Bots

Overview

Skia's Swarming bots are hosted in three places:

• Google Compute Engine. This is the preferred location for bots which don't need to run on physical hardware, ie. anything that doesn't require a GPU or a specific hardware configuration. Most of our compile bots live here, along with some non-GPU test bots on Linux and Windows. We get surprisingly stable performance numbers from GCE, despite very few guarantees about the physical hardware.
• Chrome Golo. This is the preferred location for bots which require specific hardware or OS configurations that are not supported by GCE. We have several Mac, Linux, and Windows bots in the Golo.
• The Skolo (local Skia lab in Chapel Hill). Anything we can't get in GCE or the Golo lives here. This includes a wider variety of GPUs and all Android, ChromeOS, iOS, and other devices.

go/skbl lists all Skia Swarming bots.

Adding new jobs

See Skia Automated Testing for an overview of how jobs and tasks are executed by the Skia Task Scheduler.

If you would like to add jobs to build or test new configurations, please file a New Bot Request.

If you know that the new jobs will need new hardware or you aren't sure which existing bots should run the new jobs, assign to jcgregorio. Once the Infra team has allocated the hardware, we will assign back to you to complete the process.

Generally it's possible to copy an existing job and make changes to accomplish what you want. You will need to add the new job to infra/bots/jobs.json. In some cases, you will need to make changes to recipes:

• If there are new GN flags or compiler options: infra/bots/recipe_modules/flavor/gn_flavor.py
• If there are modifications to dm flags: infra/bots/recipes/test.py
• If there are modifications to nanobench flags: infra/bots/recipes/perf.py

If you need to do something more complicated, or if you are not sure how to add and configure the new jobs, please ask for help from borenet, benjaminwagner, or mtklein.

Debugging

If you need a physical machine/device to debug an issue, the current Trooper can loan one from the Skolo. For Internet access, you can connect to GoogleGuest WiFi.

If you need to make changes on a Skolo device, please check with an Infra team member. Most can be flashed/imaged back to a clean state, but others can not.

If a permanent change needs to be made on the machine (such as an OS or driver update), please file a bug and assign to jcgregorio for reassignment.

Maintenance Tasks

See the Skolo maintenance doc.