Commit c8f4b19d authored by Hangbin Liu's avatar Hangbin Liu Committed by Jakub Kicinski
Browse files

selftests/net/forwarding: add slowwait functions 



Add slowwait functions to wait for some operations that may need a long time
to finish. The busywait executes the cmd too fast, which is kind of wasting
cpu in this scenario. At the same time, if shell debugging is enabled with
`set -x`. the busywait will output too much logs.

Reviewed-by: default avatarPrzemek Kitszel <przemyslaw.kitszel@intel.com>
Signed-off-by: default avatarHangbin Liu <liuhangbin@gmail.com>
Link: https://lore.kernel.org/r/20240205130048.282087-2-liuhangbin@gmail.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent b27696cd

tools/testing/selftests/net/forwarding/lib.sh

+35 −0
Original line number Diff line number Diff line
@@ -37,6 +37,32 @@ fi 


source "$net_forwarding_dir/../lib.sh"



# timeout in seconds

slowwait()

{

	local timeout=$1; shift



	local start_time="$(date -u +%s)"

	while true

	do

		local out

		out=$("$@")

		local ret=$?

		if ((!ret)); then

			echo -n "$out"

			return 0

		fi



		local current_time="$(date -u +%s)"

		if ((current_time - start_time > timeout)); then

			echo -n "$out"

			return 1

		fi



		sleep 0.1

	done

}



##############################################################################

# Sanity checks
@@ -478,6 +504,15 @@ busywait_for_counter() 
	busywait "$timeout" until_counter_is ">= $((base + delta))" "$@"

}



slowwait_for_counter()

{

	local timeout=$1; shift

	local delta=$1; shift



	local base=$("$@")

	slowwait "$timeout" until_counter_is ">= $((base + delta))" "$@"

}



setup_wait_dev()

{

	local dev=$1; shift