Hi Tom,
On Mon, 23 Sept 2024 at 22:36, Tom Rini trini@konsulko.com wrote:
On Fri, Sep 20, 2024 at 08:01:35AM +0200, Simon Glass wrote:
Labgrid provides access to a hardware lab in an automated way. It is possible to boot U-Boot on boards in the lab without physically touching them. It relies on relays, USB UARTs and SD muxes, among other things.
By way of background, about 4 years ago I wrong a thing called Labman[1] which allowed my lab of about 30 devices to be operated remotely, using tbot for the console and build integration. While it worked OK and I used it for many bisects, I didn't take it any further.
It turns out that there was already an existing program, called Labgrid, which I did not know about at time (thank you Tom for telling me). It is more rounded than Labman and has a number of advantages:
- does not need udev rules, mostly
- has several existing users who rely on it
- supports multiple machines exporting their devices
It lacks a 'lab check' feature and a few other things, but these can be remedied.
On and off over the past several weeks I have been experimenting with Labgrid. I have managed to create an initial U-Boot integration (this series) by adding various features to Labgrid[2] and the U-Boot test hooks.
I hope that this might inspire others to set up boards and run tests automatically, rather than relying on infrequent, manual test. Perhaps it may even be possible to have a number of labs available.
Included in the integration are a number of simple scripts which make it easy to connect to boards and run tests:
ub-int <target> Build and boot on a target, starting an interactive session
ub-cli <target> Build and boot on a target, ensure U-Boot starts and provide an interactive session from there
ub-smoke <target> Smoke test U-Boot to check that it boots to a prompt on a target
ub-bisect <target> Bisect a git tree to locate a failure on a particular target
ub-pyt <target> <testspec> Run U-Boot pytests on a target
Some of these help to provide the same tbot[4] workflow which I have relied on for several years, albeit much simpler versions.
The goal here is to create some sort of script which can collect patches from the mailing list, apply them and test them on a selection of boards. I suspect that script already exists, so please let me know what you suggest.
I still really wish you would split the labgrid parts of this series out from the pytest fixes and improvement parts. Things are largely fine outside of the labgrid part for example, which I'll probably just take after confirming it doesn't break using labgrid other ways.
I have had a few attempts at this, but it ends up being somewhat arbitrary.
Perhaps I could split out a series with the exception-handling changes and the typo? Perhaps 'Avoid failing skipped tests' also?
Regards, Simon