rc-service stop deley one second for each service

[cattyhouse]

issue

both supervise-daemon and start-stop-daemon have the issue.

let's say we have 5 services to stop in a script :

for service in A B C D E ; do rc-service $service stop ; done

A takes 0.09s to stop, but after that, each of B C D E takes about 1 seconds to stop.

tested distro

• alpine linux, has the issue

alpine 3.11-3.17 and current edge, aarch64 and x86_64, all have the same issue

• gentoo livecd with openrc 0.45.2, does not have the issue

Gentoo livecd install-arm64-minimal-20230305T233159Z.iso with openrc 0.45.2 , but no issue. every service takes about 0.05s~0.09s to stop

it would be nice if the devs could run below test on your favorite distro and verify, thanks a lot

test script

#!/bin/sh
# what is this for
# well, if we stop multiple services in a script
# the first one is always fast, but after that, it becomes super slow
#

# nc is a good program to test supervise-daemon
# create 5 nc daemons, listen on 5 different port


# prepare
echo '+++ prepare 5 nc daemons +++'
echo

for i in 1 2 3 4 5 ; do

cat <<EOF > /etc/init.d/supervise-daemon_$i
#!/sbin/openrc-run
supervisor="supervise-daemon"
command="/bin/busybox"
command_args="nc -l -s 127.0.0.1 -p 3000$i"
EOF

chmod +x /etc/init.d/supervise-daemon_$i
echo "created /etc/init.d/supervise-daemon_$i"

done
echo


# measure start
echo "+++ measure time to start 5 daemons +++"
echo

for i in 1 2 3 4 5 ; do
    echo "==> starting supervise-daemon_$i"
    time rc-service -q supervise-daemon_$i start
    echo
done

echo "+++ measure time to stop 5 daemons +++"
echo

# measure stop
for i in 1 2 3 4 5 ; do
    echo "==> stopping supervise-daemon_$i"
    time rc-service -q supervise-daemon_$i stop
    echo
done
# clean
for i in 1 2 3 4 5 ; do
    rm -f /etc/init.d/supervise-daemon_$i
    echo "/etc/init.d/supervise-daemon_$i deleted"
done

test result (on alpine linux)

+++ prepare 5 nc daemons +++

created /etc/init.d/supervise-daemon_1
created /etc/init.d/supervise-daemon_2
created /etc/init.d/supervise-daemon_3
created /etc/init.d/supervise-daemon_4
created /etc/init.d/supervise-daemon_5

+++ measure time to start 5 daemons +++

==> starting supervise-daemon_1
real	0m 0.91s
user	0m 0.43s
sys	0m 0.49s

==> starting supervise-daemon_2
real	0m 0.09s
user	0m 0.02s
sys	0m 0.04s

==> starting supervise-daemon_3
real	0m 0.08s
user	0m 0.03s
sys	0m 0.03s

==> starting supervise-daemon_4
real	0m 0.09s
user	0m 0.02s
sys	0m 0.03s

==> starting supervise-daemon_5
real	0m 0.10s
user	0m 0.03s
sys	0m 0.03s

+++ measure time to stop 5 daemons +++

==> stopping supervise-daemon_1
real	0m 0.09s
user	0m 0.03s
sys	0m 0.04s

==> stopping supervise-daemon_2
real	0m 1.00s
user	0m 0.06s
sys	0m 0.33s

==> stopping supervise-daemon_3
real	0m 1.00s
user	0m 0.09s
sys	0m 0.36s

==> stopping supervise-daemon_4
real	0m 0.99s
user	0m 0.09s
sys	0m 0.35s

==> stopping supervise-daemon_5
real	0m 1.00s
user	0m 0.08s
sys	0m 0.39s

/etc/init.d/supervise-daemon_1 deleted
/etc/init.d/supervise-daemon_2 deleted
/etc/init.d/supervise-daemon_3 deleted
/etc/init.d/supervise-daemon_4 deleted
/etc/init.d/supervise-daemon_5 deleted

note : i reported the issue on alpine aport issue, but got closed, they say it is better to report to upstream.

[nekopsykose]

was it fixed?

[cattyhouse]

was it fixed?

nope. someone who cares can reopen this issue

[nekopsykose]

nope.

then don't close it