The command sleep holds the host CPU until it completes. Send keep_alive to GDB, so it will not timeout. Change-Id: I92e9c5fc871b4e6a7695cdc449ca9fb3c1f1d9ec Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com> Reviewed-on: https://review.openocd.org/c/openocd/+/6770 Tested-by: jenkins Reviewed-by: Jan Matyas <matyas@codasip.com>