* software interrupts close to 100 with 9000 tc filter entries
@ 2017-09-19 13:28 Marco Berizzi
2017-09-19 14:01 ` Eric Dumazet
0 siblings, 1 reply; 3+ messages in thread
From: Marco Berizzi @ 2017-09-19 13:28 UTC (permalink / raw)
To: netdev
Hi Folks,
I'm running linux 4.12.10 x86_64 on a Slackware 14.2 64bit
as a simple 4 NIC router. Network throughput processed by
this machine is less than 200Mbit/s
The cpu model is Intel(R) Xeon(R) CPU 5160 @ 3.00GHz with
2GB ram.
I need to blacklist about 9000 single ip addresses.
This is the relevant script to blacklist these ip addresses:
tc qdisc add dev eth0 ingress
tc qdisc add dev eth1 ingress
while read -r line
do
tc filter add dev eth0 parent ffff: protocol ip prio 50 u32 match ip src $line action drop
tc filter add dev eth1 parent ffff: protocol ip prio 50 u32 match ip src $line action drop
done < blacklisted_ip_addresses
After loading these ip addresses, the si (software interrupts)
number shown by top is always close to 100
If I delete the ingress qdisc on both the device, the si
fall down to less than 5
Running the same script with 'only' 700 ip addresses is
flawless.
Kindly I would like to ask if am I doing anything in
a wrong way or if the hardware is too old for this kind
of setup.
I have selected the tc filter setup instead of netfilter
one, because I was reading this from iproute2/doc/actions:
A side effect is that we can now get stateless firewalling to work with tc..
Essentially this is now an alternative to iptables.
I wont go into details of my dislike for iptables at times, but.
scalability is one of the main issues; however, if you need stateful
classification - use netfilter (for now).
Any response are welcome
TIA
Marco
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: software interrupts close to 100 with 9000 tc filter entries
2017-09-19 13:28 software interrupts close to 100 with 9000 tc filter entries Marco Berizzi
@ 2017-09-19 14:01 ` Eric Dumazet
2017-09-19 14:57 ` Marco Berizzi
0 siblings, 1 reply; 3+ messages in thread
From: Eric Dumazet @ 2017-09-19 14:01 UTC (permalink / raw)
To: Marco Berizzi; +Cc: netdev
On Tue, 2017-09-19 at 15:28 +0200, Marco Berizzi wrote:
> Hi Folks,
>
> I'm running linux 4.12.10 x86_64 on a Slackware 14.2 64bit
> as a simple 4 NIC router. Network throughput processed by
> this machine is less than 200Mbit/s
> The cpu model is Intel(R) Xeon(R) CPU 5160 @ 3.00GHz with
> 2GB ram.
>
> I need to blacklist about 9000 single ip addresses.
> This is the relevant script to blacklist these ip addresses:
>
> tc qdisc add dev eth0 ingress
> tc qdisc add dev eth1 ingress
>
> while read -r line
> do
> tc filter add dev eth0 parent ffff: protocol ip prio 50 u32 match ip src $line action drop
> tc filter add dev eth1 parent ffff: protocol ip prio 50 u32 match ip src $line action drop
> done < blacklisted_ip_addresses
>
> After loading these ip addresses, the si (software interrupts)
> number shown by top is always close to 100
> If I delete the ingress qdisc on both the device, the si
> fall down to less than 5
>
> Running the same script with 'only' 700 ip addresses is
> flawless.
>
> Kindly I would like to ask if am I doing anything in
> a wrong way or if the hardware is too old for this kind
> of setup.
>
> I have selected the tc filter setup instead of netfilter
> one, because I was reading this from iproute2/doc/actions:
>
> A side effect is that we can now get stateless firewalling to work with tc..
> Essentially this is now an alternative to iptables.
> I wont go into details of my dislike for iptables at times, but.
> scalability is one of the main issues; however, if you need stateful
> classification - use netfilter (for now).
>
> Any response are welcome
> TIA
Processing a list of 700 rules per incoming packet is not wise.
Alternatives :
- netfilter with IPSET : This probably can be done with one lookup in a
table. Probably easiest way to setup.
- BPF filter (XDP or TC )
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: software interrupts close to 100 with 9000 tc filter entries
2017-09-19 14:01 ` Eric Dumazet
@ 2017-09-19 14:57 ` Marco Berizzi
0 siblings, 0 replies; 3+ messages in thread
From: Marco Berizzi @ 2017-09-19 14:57 UTC (permalink / raw)
To: Eric Dumazet; +Cc: netdev
> Eric Dumazet wrote:
>
> On Tue, 2017-09-19 at 15:28 +0200, Marco Berizzi wrote:
>
> > Hi Folks,
> >
> > I'm running linux 4.12.10 x86_64 on a Slackware 14.2 64bit
> > as a simple 4 NIC router. Network throughput processed by
> > this machine is less than 200Mbit/s
> > The cpu model is Intel(R) Xeon(R) CPU 5160 @ 3.00GHz with
> > 2GB ram.
> >
> > I need to blacklist about 9000 single ip addresses.
> > This is the relevant script to blacklist these ip addresses:
> >
> > tc qdisc add dev eth0 ingress
> > tc qdisc add dev eth1 ingress
> >
> > while read -r line
> > do
> > tc filter add dev eth0 parent ffff: protocol ip prio 50 u32 match ip src $line action drop
> > tc filter add dev eth1 parent ffff: protocol ip prio 50 u32 match ip src $line action drop
> > done < blacklisted_ip_addresses
> >
> > After loading these ip addresses, the si (software interrupts)
> > number shown by top is always close to 100
> > If I delete the ingress qdisc on both the device, the si
> > fall down to less than 5
> >
> > Running the same script with 'only' 700 ip addresses is
> > flawless.
> >
> > Kindly I would like to ask if am I doing anything in
> > a wrong way or if the hardware is too old for this kind
> > of setup.
> >
> > I have selected the tc filter setup instead of netfilter
> > one, because I was reading this from iproute2/doc/actions:
> >
> > A side effect is that we can now get stateless firewalling to work with tc..
> > Essentially this is now an alternative to iptables.
> > I wont go into details of my dislike for iptables at times, but.
> > scalability is one of the main issues; however, if you need stateful
> > classification - use netfilter (for now).
> >
> > Any response are welcome
> > TIA
>
> Processing a list of 700 rules per incoming packet is not wise.
>
> Alternatives :
>
> * netfilter with IPSET : This probably can be done with one lookup in a
> table. Probably easiest way to setup.
>
> * BPF filter (XDP or TC )
Thanks Eric for the quick response.
For better performance (latency time and network throughput) which is the better
solution? netfilter with ipset or BPF?
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2017-09-19 14:57 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-09-19 13:28 software interrupts close to 100 with 9000 tc filter entries Marco Berizzi
2017-09-19 14:01 ` Eric Dumazet
2017-09-19 14:57 ` Marco Berizzi
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.