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| author | Jerome Forissier <jerome.forissier@linaro.org> | 2025-04-18 16:09:42 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2025-04-23 13:19:44 -0600 |
| commit | ec89a4f7a3cbdfe601a45c110b375e925190f095 (patch) | |
| tree | 0cc58c3b91f33ddc658ab24a4b94b5ac375e6af7 /tools/u_boot_pylib/test_util.py | |
| parent | 1c0f6999b5589315201ebb5aa659eb6658079b8e (diff) | |
cmd: add spawn and wait commands
Add a spawn command which runs another command in the background, as
well as a wait command to suspend the shell until one or more background
jobs have completed. The job_id environment variable is set by spawn and
wait accepts optional job ids, so that one can selectively wait on any
job.
Example:
=> date; spawn sleep 5; spawn sleep 3; date; echo "waiting..."; wait; date
Date: 2025-02-21 (Friday) Time: 17:04:52
Date: 2025-02-21 (Friday) Time: 17:04:52
waiting...
Date: 2025-02-21 (Friday) Time: 17:04:57
=>
Another example showing how background jobs can make initlizations
faster. The board is i.MX93 EVK, with one spinning HDD connected to
USB1 via a hub, and a network cable plugged into ENET1.
# From power up / reset
u-boot=> setenv autoload 0
u-boot=> setenv ud "usb start; dhcp"
u-boot=> time run ud
[...]
time: 8.058 seconds
# From power up / reset
u-boot=> setenv autoload 0
u-boot=> setenv ud "spawn usb start; spawn dhcp; wait"
u-boot=> time run ud
[...]
time: 4.475 seconds
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Diffstat (limited to 'tools/u_boot_pylib/test_util.py')
0 files changed, 0 insertions, 0 deletions