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Subject[PATCH net-next 3/4] selftests: net: tsn_lib: allow multiple isochron receivers
Date
Move the PID variable for the isochron receiver into a separate
namespace per stats port, to allow multiple receivers (and/or
orchestration daemons) to be instantiated by the same script.

Preserve the existing behavior by making isochron_do() use the default
stats TCP port of 5000.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
.../testing/selftests/net/forwarding/tsn_lib.sh | 16 +++++++++++-----
1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/tools/testing/selftests/net/forwarding/tsn_lib.sh b/tools/testing/selftests/net/forwarding/tsn_lib.sh
index ace9c4f06805..20c2b411ba36 100644
--- a/tools/testing/selftests/net/forwarding/tsn_lib.sh
+++ b/tools/testing/selftests/net/forwarding/tsn_lib.sh
@@ -147,7 +147,9 @@ isochron_recv_start()
{
local if_name=$1
local uds=$2
- local extra_args=$3
+ local stats_port=$3
+ local extra_args=$4
+ local pid="isochron_pid_${stats_port}"

if ! [ -z "${uds}" ]; then
extra_args="${extra_args} --unix-domain-socket ${uds}"
@@ -158,16 +160,20 @@ isochron_recv_start()
--sched-priority 98 \
--sched-fifo \
--utc-tai-offset ${UTC_TAI_OFFSET} \
+ --stats-port ${stats_port} \
--quiet \
${extra_args} & \
- isochron_pid=$!
+ declare -g "${pid}=$!"

sleep 1
}

isochron_recv_stop()
{
- { kill ${isochron_pid} && wait ${isochron_pid}; } 2> /dev/null
+ local stats_port=$1
+ local pid="isochron_pid_${stats_port}"
+
+ { kill ${!pid} && wait ${!pid}; } 2> /dev/null
}

isochron_do()
@@ -219,7 +225,7 @@ isochron_do()

cpufreq_max ${ISOCHRON_CPU}

- isochron_recv_start "${h2}" "${receiver_uds}" "${receiver_extra_args}"
+ isochron_recv_start "${h2}" "${receiver_uds}" 5000 "${receiver_extra_args}"

isochron send \
--interface ${sender_if_name} \
@@ -240,7 +246,7 @@ isochron_do()
${extra_args} \
--quiet

- isochron_recv_stop
+ isochron_recv_stop 5000

cpufreq_restore ${ISOCHRON_CPU}
}
--
2.34.1
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