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enh: Add support for SO_PRIORITY socket option. #1476

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enh: Add support for SO_PRIORITY socket option. #1476

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olerem
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@olerem olerem commented Feb 27, 2023

This functionality is needed to test mutliqueue support of Ethernet drivers.

Here is one use case example how this functionality can be tested:

On the server side:
# create mqprio queue discipline on lan2 interface
tc qdisc add dev lan2 parent root handle 100 mqprio num_tc 4 map 0 1 2 3  queues 1@0 1@1 1@2 1@3  hw 0
iperf3 -s &
# collect queue stats
tc -s qdisc show dev lan2

On the client side:
# start tcp reverse stream with socket priority 2
iperf3 -c  172.17.0.1 -b100M  -l1472 -t100 -R --sock-prio 2

On the server side:
# collect queue stats
tc -s qdisc show dev lan2

qdisc mqprio 100: root tc 4 map 0 1 2 3 0 0 0 0 0 0 0 0 0 0 0 0 
             queues:(0:0) (1:1) (2:2) (3:3) 
 Sent 35748478 bytes 23639 pkt (dropped 0, overlimits 0 requeues 0) 
 backlog 0b 0p requeues 0
qdisc fq_codel 0: parent 100:4 limit 10240p flows 1024 quantum 1514 target 5ms interval 100ms memory_limit 32Mb ecn drop_batch 64 
 Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0) 
 backlog 0b 0p requeues 0
  maxpacket 0 drop_overlimit 0 new_flow_count 0 ecn_mark 0
  new_flows_len 0 old_flows_len 0
qdisc fq_codel 0: parent 100:3 limit 10240p flows 1024 quantum 1514 target 5ms interval 100ms memory_limit 32Mb ecn drop_batch 64 
 **Sent 17628922 bytes 11649 pkt** (dropped 0, overlimits 0 requeues 0) 
 backlog 0b 0p requeues 0
  maxpacket 0 drop_overlimit 0 new_flow_count 0 ecn_mark 0
  new_flows_len 0 old_flows_len 0
qdisc fq_codel 0: parent 100:2 limit 10240p flows 1024 quantum 1514 target 5ms interval 100ms memory_limit 32Mb ecn drop_batch 64 
 Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0) 
 backlog 0b 0p requeues 0
  maxpacket 0 drop_overlimit 0 new_flow_count 0 ecn_mark 0
  new_flows_len 0 old_flows_len 0
qdisc fq_codel 0: parent 100:1 limit 10240p flows 1024 quantum 1514 target 5ms interval 100ms memory_limit 32Mb ecn drop_batch 64 
 Sent 18119556 bytes 11990 pkt (dropped 0, overlimits 0 requeues 0) 
 backlog 0b 0p requeues 0
  maxpacket 0 drop_overlimit 0 new_flow_count 0 ecn_mark 0
  new_flows_len 0 old_flows_len 0

At this point we should be able to see increasing counters on "qdisc fq_codel 0: parent 100:3 ..."

@olerem
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olerem commented Mar 3, 2023

json variable is lest. Will send new version soon.

intel-lab-lkp pushed a commit to intel-lab-lkp/linux that referenced this pull request Mar 6, 2023
@olerem @intel-lab-lkp
net: dsa: microchip: add ETS Qdisc support for KSZ9477 series
f9fec81 
Add ETS Qdisc support for KSZ9477 of switches. Current implementation is
limited to strict priority mode.

Tested on KSZ8563R with following configuration:
tc qdisc replace dev lan2 root handle 1: ets strict 4 \
  priomap 3 3 2 2 1 1 0 0
ip link add link lan2 name v1 type vlan id 1 \
  egress-qos-map 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7

and patched iperf3 version:
esnet/iperf#1476
iperf3 -c 172.17.0.1 -b100M  -l1472 -t100 -u -R --sock-prio 2

Signed-off-by: Oleksij Rempel <[email protected]>
intel-lab-lkp pushed a commit to intel-lab-lkp/linux that referenced this pull request Mar 8, 2023
@olerem @intel-lab-lkp
net: dsa: microchip: add ETS Qdisc support for KSZ9477 series
7349499 
Add ETS Qdisc support for KSZ9477 of switches. Current implementation is
limited to strict priority mode.

Tested on KSZ8563R with following configuration:
tc qdisc replace dev lan2 root handle 1: ets strict 4 \
  priomap 3 3 2 2 1 1 0 0
ip link add link lan2 name v1 type vlan id 1 \
  egress-qos-map 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7

and patched iperf3 version:
esnet/iperf#1476
iperf3 -c 172.17.0.1 -b100M  -l1472 -t100 -u -R --sock-prio 2

Signed-off-by: Oleksij Rempel <[email protected]>
intel-lab-lkp pushed a commit to intel-lab-lkp/linux that referenced this pull request Mar 10, 2023
@olerem @intel-lab-lkp
net: dsa: microchip: add ETS Qdisc support for KSZ9477 series
b897e8e 
Add ETS Qdisc support for KSZ9477 of switches. Current implementation is
limited to strict priority mode.

Tested on KSZ8563R with following configuration:
tc qdisc replace dev lan2 root handle 1: ets strict 4 \
  priomap 3 3 2 2 1 1 0 0
ip link add link lan2 name v1 type vlan id 1 \
  egress-qos-map 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7

and patched iperf3 version:
esnet/iperf#1476
iperf3 -c 172.17.0.1 -b100M  -l1472 -t100 -u -R --sock-prio 2

Signed-off-by: Oleksij Rempel <[email protected]>
ttoukan pushed a commit to Mellanox/nic-kernel that referenced this pull request Mar 15, 2023
@olerem
net: dsa: microchip: add ETS Qdisc support for KSZ9477 series
c2df86e 
Add ETS Qdisc support for KSZ9477 of switches. Current implementation is
limited to strict priority mode.

Tested on KSZ8563R with following configuration:
tc qdisc replace dev lan2 root handle 1: ets strict 4 \
  priomap 3 3 2 2 1 1 0 0
ip link add link lan2 name v1 type vlan id 1 \
  egress-qos-map 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7

and patched iperf3 version:
esnet/iperf#1476
iperf3 -c 172.17.0.1 -b100M  -l1472 -t100 -u -R --sock-prio 2

Signed-off-by: Oleksij Rempel <[email protected]>
Acked-by: Arun Ramadoss <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
@olerem
enh: Add support for SO_PRIORITY socket option.
5bb90e8 
This functionality is needed to test multi queue support of Ethernet
drivers.

Co-developed-by: Oleksij Rempel <[email protected]>
Signed-off-by: Oleksij Rempel <[email protected]>
Co-developed-by: Marc Kleine-Budde <[email protected]>
Signed-off-by: Marc Kleine-Budde <[email protected]>
@olerem
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olerem commented Apr 22, 2024

Hi @bmah888, can you please give me some feedback for this PR :)

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