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Ben Wagner 172c6bd8e9 Add more detail to Swarming bot doc. 
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Docs-Preview: https://skia.org/?cl=54561
Change-Id: Id7bcccf1ffa7b1726bc5f9394178a629078b1225
Reviewed-on: https://skia-review.googlesource.com/54561
Commit-Queue: Ben Wagner <benjaminwagner@google.com>
Reviewed-by: Ravi Mistry <rmistry@google.com>
Reviewed-by: Eric Boren <borenet@google.com>
2017-10-04 16:31:33 +00:00

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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.

Debugging

If you need to run code on a specific machine/device to debug an issue, the simplest option is to run tryjobs (after adding debugging output to the relevant code). In some cases you may also need to create or modify tryjobs.

For Googlers: If you need more control (e.g. to run GDB), the current Trooper can loan a machine/device from the Skolo. All bots are accessible via either SSH or VNC -- see the Skolo maintenance doc remote access section and/or get help from the Trooper. You can also bring the device back to your desk and connect it to GoogleGuest WiFi or the Google Test Network.

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.