Simple tests are as attached.
On Sun, Mar 31, 2019 at 4:53 PM Xin Long <[email protected]> wrote:
>
> sctp memory accounting is added in this patchset by using
> these kernel APIs on send side:
>
> - sk_mem_charge()
> - sk_mem_uncharge()
> - sk_wmem_schedule()
> - sk_under_memory_pressure()
> - sk_mem_reclaim()
>
> and these on receive side:
>
> - sk_mem_charge()
> - sk_mem_uncharge()
> - sk_rmem_schedule()
> - sk_under_memory_pressure()
> - sk_mem_reclaim()
>
> With sctp memory accounting, we can limit the memory allocation by
> either sysctl:
>
> # sysctl -w net.sctp.sctp_mem="10 20 50"
>
> or cgroup:
>
> # echo $((8<<14)) > \
> /sys/fs/cgroup/memory/sctp_mem/memory.kmem.tcp.limit_in_bytes
>
> When the socket is under memory pressure, the send side will block
> and wait, while the receive side will renege or drop.
>
> Xin Long (2):
> sctp: implement memory accounting on tx path
> sctp: implement memory accounting on rx path
>
> include/net/sctp/sctp.h | 2 +-
> net/sctp/sm_statefuns.c | 6 ++++--
> net/sctp/socket.c | 10 ++++++++--
> net/sctp/ulpevent.c | 19 ++++++++-----------
> net/sctp/ulpqueue.c | 3 ++-
> 5 files changed, 23 insertions(+), 17 deletions(-)
>
> --
> 2.1.0
>
#!/bin/sh
# TOPO: local (10.73.131.158) <--> peer (10.73.131.202) [hosts not netns]
peer_run()
{
ssh [email protected] "$@"
# echo " - peer run: $@"
# echo " - print any key to continue after it's done"
# read
}
modprobe sctp
echo "sctp sysctl memory control rmem:"
echo "--------------------------------"
echo "10 20 50 rmem limit ->"
pkill sctp_test 2> /dev/null
sysctl -w net.sctp.sctp_mem="10 20 50"
sctp_test -H 10.73.131.158 -P 1234 -l > /dev/null 2>&1 &
sleep 3
peer_run "time sctp_test -H 10.73.131.202 -P 8000 -h 10.73.131.158 -p 1234 -s -c 5 > /dev/null 2>&1"
echo ""
echo "20 50 100 rmem limit ->"
pkill sctp_test 2> /dev/null
sysctl -w net.sctp.sctp_mem="20 50 100"
sctp_test -H 10.73.131.158 -P 1234 -l > /dev/null 2>&1 &
sleep 3
peer_run "time sctp_test -H 10.73.131.202 -P 8000 -h 10.73.131.158 -p 1234 -s -c 5 > /dev/null 2>&1"
echo ""
echo "sctp sysctl memory control wmem:"
echo "--------------------------------"
peer_run "sctp_test -H 10.73.131.202 -P 8000 -l > /dev/null 2>&1 &"
tc qdisc add dev eth0 root netem delay 50ms
echo "10 20 50 wmem limit ->"
sysctl -w net.sctp.sctp_mem="5 10 20"
time sctp_test -h 10.73.131.202 -p 8000 -H 10.73.131.158 -P 1234 -s -c 5 > /dev/null 2>&1
echo ""
echo "10 50 100 wmem limit ->"
sysctl -w net.sctp.sctp_mem="10 50 100 ->"
time sctp_test -h 10.73.131.202 -p 8000 -H 10.73.131.158 -P 1234 -s -c 5 > /dev/null 2>&1
echo ""
tc qdisc delete dev eth0 root
peer_run "pkill sctp_test 2>/dev/null"
#!/bin/sh
# TOPO: 127.0.0.1 lo
modprobe sctp
pkill sctp_test 2> /dev/null
sctp_test -H 127.0.0.1 -P 1234 -l > /dev/null 2>&1 &
sleep 3
mkdir /sys/fs/cgroup/memory/sctp_mem > /dev/null 2>&1;
echo "sctp_wmem testing:"
echo "------------------"
echo "$((8<<14)) bytes for wmem limit ->"
echo $((8<<14)) >/sys/fs/cgroup/memory/sctp_mem/memory.kmem.tcp.limit_in_bytes
{
echo $BASHPID > /sys/fs/cgroup/memory/sctp_mem/cgroup.procs
time sctp_test -H 127.0.0.1 -P 8000 -h 127.0.0.1 -p 1234 -s -c 5 > /dev/null 2>&1
echo ""
} &
wait $!
echo "$((8<<16)) bytes for wmem limit ->"
echo $((8<<16)) >/sys/fs/cgroup/memory/sctp_mem/memory.kmem.tcp.limit_in_bytes
{
echo $BASHPID > /sys/fs/cgroup/memory/sctp_mem/cgroup.procs
time sctp_test -H 127.0.0.1 -P 8000 -h 127.0.0.1 -p 1234 -s -c 5 > /dev/null 2>&1
echo ""
} &
wait $!
echo "sctp_rmem testing:"
echo "------------------"
echo "$((8<<13)) bytes for rmem limit ->"
pkill sctp_test 2> /dev/null
echo $((8<<13)) >/sys/fs/cgroup/memory/sctp_mem/memory.kmem.tcp.limit_in_bytes
{
echo $BASHPID > /sys/fs/cgroup/memory/sctp_mem/cgroup.procs
sctp_test -H 127.0.0.1 -P 1234 -l > /dev/null 2>&1
} &
sleep 3
time sctp_test -H 127.0.0.1 -P 8000 -h 127.0.0.1 -p 1234 -s -c 5 > /dev/null 2>&1
echo ""
echo "$((8<<14)) bytes for rmem limit ->"
pkill sctp_test 2> /dev/null
echo $((8<<14)) >/sys/fs/cgroup/memory/sctp_mem/memory.kmem.tcp.limit_in_bytes
{
echo $BASHPID > /sys/fs/cgroup/memory/sctp_mem/cgroup.procs
sctp_test -H 127.0.0.1 -P 1234 -l > /dev/null 2>&1
} &
sleep 3
time sctp_test -H 127.0.0.1 -P 8000 -h 127.0.0.1 -p 1234 -s -c 5 > /dev/null 2>&1
echo ""
echo "sctp_wmem_and_rmem testing:"
echo "---------------------------"
echo "$((8<<14)) bytes for wmem AND rmem limit ->"
pkill sctp_test 2> /dev/null
echo $((8<<14)) >/sys/fs/cgroup/memory/sctp_mem/memory.kmem.tcp.limit_in_bytes
{
echo $BASHPID > /sys/fs/cgroup/memory/sctp_mem/cgroup.procs
sctp_test -H 127.0.0.1 -P 1234 -l > /dev/null 2>&1 &
sleep 3
time sctp_test -H 127.0.0.1 -P 8000 -h 127.0.0.1 -p 1234 -s -c 5 > /dev/null 2>&1
echo ""
} &
wait
