Quoting Benoit Lourdelet (blour...@juniper.net):
> Hello,
>
>
> Inline after BL>>
>
>
> Quoting Benoit Lourdelet (blour...@juniper.net):
> >Hello Serge,
> >I am running on a 256MB RAM host, with plenty of free memory.
>
> G? :)
>
> >I issue echo t > /proc/sysrq-trigger when containers was taking 30s to
> >start , it gave the following. Nothing that caught my attention.
>
> Hm. Thanks.
>
> I guess I would first just try:
>
> for i in `seq 1 1700`; do
> sudo unshare -n sleep 2h
> if [ $((i % 100)) -eq 0 ]; then
> echo $i
> fi
> Done
>
> B>>> on my system, it does not give any output : never reaches "echo"
>
> and see if it starts to slow down with just that. If so, then go to
> the linux-kernel mailing list as there is something in the netns
> which is not scaling. If not, then next write a script like
>
> cat > /bin/simplenetns << EOF
> #!/bin/sh
> ip link add type veth
> sleep 2h
> EOF
> chmod ugo+x /bin/simplenetns
>
> and do
>
> for i in `seq 1 1700`; do
> sudo unshare -n /bin/simplenetns > /tmp/out.$$ 2>&1 &
> if [ $((i % 100)) -eq 0 ]; then
> echo $i
> fi
> Done
>
>
> BL>> This script takes a couple of second, even I scaled to 5000 without
> taking more the a couple of seconds.
Great!
> If that slows down, then it's the veth creations doing it.
>
> If not, then try adding the veths from the parent task and one end into
> the container, so that you end up with n/2 veths in the host.
>
> BL>> I would need detailed instructions.
Well let's first just see if it's sysfs not scaling - what if you just do
for i in `seq 1 2000`; do
sudo ip link add type veth
if [ $((i % 100)) -eq 0 ]; then
echo $i
ls /sys/class/net
fi
done
Then make sure to delete them :)
for d in /sys/class/net/veth*; do
ip link del `basename $d` 2>/dev/null || true
done
Now if that still scales fine, then let's try passing the veths into the
container... uh, i'll send a script for that after we get this result :)
thanks!
-serge
> Thanks
>
> Benoit
>
> If that does it, then it may just be a sysfs scalability bug.
>
> And if that still doesn't do it, then try adding the host end of each
> veth pair to a host bridge. If that does it, then it may be a bridge
> scaling issue.
>
> (if you want scripts for the later ones pls shout)
>
> I'll be very interested to hear which if any of these triggers it.
>
> thanks,
> -serge
>
>
------------------------------------------------------------------------------
Everyone hates slow websites. So do we.
Make your web apps faster with AppDynamics
Download AppDynamics Lite for free today:
http://p.sf.net/sfu/appdyn_d2d_mar
_______________________________________________
Lxc-users mailing list
Lxc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/lxc-users
