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netifd: add a packet steering mode matching the old script 

This spreads packet processing across all cores

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2024-04-24 19:16:05 +02:00
parent b5c53848c3
commit c4d394c6cc
1 changed files with 21 additions and 2 deletions
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23
package/network/config/netifd/files/usr/libexec/network/packet-steering.uc
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@ -9,6 +9,7 @@ let eth_bias = 2.0;
let debug = 0, do_nothing = 0;
let disable;
let cpus;
let all_cpus;
for (let arg in ARGV) {
switch (arg) {
@ -21,6 +22,9 @@ for (let arg in ARGV) {
case '0':
disable = true;
break;
case '2':
all_cpus = true;
break;
}
}
@ -46,9 +50,19 @@ function set_task_cpu(pid, cpu) {
system(`taskset -p -c ${cpu} ${pid}`);
}
function cpu_mask(cpu)
{
let mask;
if (cpu < 0)
mask = (1 << length(cpus)) - 1;
else
mask = (1 << int(cpu));
return sprintf("%x", mask);
}
function set_netdev_cpu(dev, cpu) {
let queues = glob(`/sys/class/net/${dev}/queues/rx-*/rps_cpus`);
let val = sprintf("%x", (1 << int(cpu)));
let val = cpu_mask(cpu);
if (disable)
val = 0;
for (let queue in queues) {
@ -173,7 +187,12 @@ function assign_dev_cpu(dev) {
}
if (length(dev.netdev) > 0) {
let cpu = dev.rx_cpu = get_next_cpu(rx_weight, dev.napi_cpu);
let cpu;
if (all_cpus)
cpu = -1;
else
cpu = get_next_cpu(rx_weight, dev.napi_cpu);
dev.rx_cpu = cpu;
for (let netdev in dev.netdev)
set_netdev_cpu(netdev, cpu);
}