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The weston runtime test is unreliable, depending on the execution speed of its runner. Example of failure is [1], and success is [2]. This commit improves the test in several ways, to make it more robust to execution speed variations: - The command started in background (weston, weston-simple-egl) are now started in a subshell. This suppresses the job control messages when they are stopped. Those messages could interfere with the parsing of the output; - Wait time are moved outside the emulator; - The kernel argument vt.global_cursor_default=0 is added, to make sure cursors are globally disabled, since the test use vkms display CRCs; - The memory of the emulator is increased to 512M. This test uses cpio initramfs, and the filesystem size increased; - The vkms driver emulates a "vsync" event, but can generate a warning when the system is too slow. This warning is printed on the console by the klogd daemon in its default configuration. This commit adds the overlay file /etc/default/klogd to limit only kernel emergency messages to be printed on the console. This change fixes the failure seen in [1] ; - Some sleep time values were adjusted to run on a "performant" idle host. Those values are not suitable in all situations. In the meantime a generic retry mechanism is added in the test infra, this commit adds a retry logic inspired from the test_flutter runtime test. Fixes: [1] [1] https://gitlab.com/buildroot.org/buildroot/-/jobs/8562483474 [2] https://gitlab.com/buildroot.org/buildroot/-/jobs/8435236652 Signed-off-by: Julien Olivain <ju.o@free.fr> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>