Re: [iproute PATCH 0/2] Netns performance improvements

2016-07-11 Thread Nicolas Dichtel
Le 08/07/2016 19:18, Rick Jones a écrit : > On 07/08/2016 01:01 AM, Nicolas Dichtel wrote: [snip] >> Do you have a script or something else to easily reproduce this problem? > > Do you mean for my much older, slightly different stuff done in HP Public > Cloud, > or for what Phil (?) is doing pres

Re: [iproute PATCH 0/2] Netns performance improvements

2016-07-08 Thread Rick Jones
On 07/08/2016 01:01 AM, Nicolas Dichtel wrote: Those 300 routers will each have at least one namespace along with the dhcp namespaces. Depending on the nature of the routers (Distributed versus Centralized Virtual Routers - DVR vs CVR) and whether the routers are supposed to be "HA" there can be

Re: [iproute PATCH 0/2] Netns performance improvements

2016-07-08 Thread Brian Haley
On 07/07/2016 01:28 PM, Rick Jones wrote: On 07/07/2016 09:34 AM, Eric W. Biederman wrote: Rick Jones writes: 300 routers is far from the upper limit/goal. Back in HP Public Cloud, we were running as many as 700 routers per network node (*), and more than four network nodes. (back then it was

Re: [iproute PATCH 0/2] Netns performance improvements

2016-07-08 Thread Eric W. Biederman
Rick Jones writes: > On 07/07/2016 09:34 AM, Eric W. Biederman wrote: >> Rick Jones writes: >>> 300 routers is far from the upper limit/goal. Back in HP Public >>> Cloud, we were running as many as 700 routers per network node (*), >>> and more than four network nodes. (back then it was just th

Re: [iproute PATCH 0/2] Netns performance improvements

2016-07-08 Thread Nicolas Dichtel
Le 07/07/2016 18:16, Rick Jones a écrit : > On 07/07/2016 08:48 AM, Phil Sutter wrote: >> On Thu, Jul 07, 2016 at 02:59:48PM +0200, Nicolas Dichtel wrote: >>> Le 07/07/2016 13:17, Phil Sutter a écrit : >>> [snip] The issue came up during OpenStack Neutron testing, see this ticket for refe

Re: [iproute PATCH 0/2] Netns performance improvements

2016-07-07 Thread Rick Jones
On 07/07/2016 09:34 AM, Eric W. Biederman wrote: Rick Jones writes: 300 routers is far from the upper limit/goal. Back in HP Public Cloud, we were running as many as 700 routers per network node (*), and more than four network nodes. (back then it was just the one namespace per router and netw

Re: [iproute PATCH 0/2] Netns performance improvements

2016-07-07 Thread Eric W. Biederman
Rick Jones writes: > On 07/07/2016 08:48 AM, Phil Sutter wrote: >> On Thu, Jul 07, 2016 at 02:59:48PM +0200, Nicolas Dichtel wrote: >>> Le 07/07/2016 13:17, Phil Sutter a écrit : >>> [snip] The issue came up during OpenStack Neutron testing, see this ticket for reference: http

Re: [iproute PATCH 0/2] Netns performance improvements

2016-07-07 Thread Rick Jones
On 07/07/2016 08:48 AM, Phil Sutter wrote: On Thu, Jul 07, 2016 at 02:59:48PM +0200, Nicolas Dichtel wrote: Le 07/07/2016 13:17, Phil Sutter a écrit : [snip] The issue came up during OpenStack Neutron testing, see this ticket for reference: https://bugzilla.redhat.com/show_bug.cgi?id=1310795

Re: [iproute PATCH 0/2] Netns performance improvements

2016-07-07 Thread Phil Sutter
On Thu, Jul 07, 2016 at 02:59:48PM +0200, Nicolas Dichtel wrote: > Le 07/07/2016 13:17, Phil Sutter a écrit : > [snip] > > The issue came up during OpenStack Neutron testing, see this ticket for > > reference: > > > > https://bugzilla.redhat.com/show_bug.cgi?id=1310795 > Access to this ticket is n

Re: [iproute PATCH 0/2] Netns performance improvements

2016-07-07 Thread Nicolas Dichtel
Le 07/07/2016 13:17, Phil Sutter a écrit : [snip] > The issue came up during OpenStack Neutron testing, see this ticket for > reference: > > https://bugzilla.redhat.com/show_bug.cgi?id=1310795 Access to this ticket is not public :(

Re: [iproute PATCH 0/2] Netns performance improvements

2016-07-07 Thread Phil Sutter
Hi, On Wed, Jul 06, 2016 at 11:58:54PM -0500, Eric W. Biederman wrote: > Phil Sutter writes: > > > Hi Eric, > > > > Thanks for your quick and insightful reply rightfully pointing out the > > lack of rationale behind this change. So let me try to catch up: > > Grr. I did not get what you are tr

Re: [iproute PATCH 0/2] Netns performance improvements

2016-07-06 Thread Eric W. Biederman
Phil Sutter writes: > Hi Eric, > > Thanks for your quick and insightful reply rightfully pointing out the > lack of rationale behind this change. So let me try to catch up: Grr. I did not get what you are trying to accomplish the first time I skimmed this and rereading it all again closely I st

Re: [iproute PATCH 0/2] Netns performance improvements

2016-07-05 Thread Phil Sutter
Hi Eric, Thanks for your quick and insightful reply rightfully pointing out the lack of rationale behind this change. So let me try to catch up: On Tue, Jul 05, 2016 at 09:44:00AM -0500, Eric W. Biederman wrote: > Phil Sutter writes: > > > Stress-testing OpenStack Neutron revealed poor performa

Re: [iproute PATCH 0/2] Netns performance improvements

2016-07-05 Thread Eric W. Biederman
Phil Sutter writes: > Stress-testing OpenStack Neutron revealed poor performance of 'ip netns' > when dealing with a high amount of namespaces. The cause of this lies in > the combination of how iproute2 mounts NETNS_RUN_DIR and the netns files > therein and the fact that systemd makes all mount

Re: [iproute PATCH 0/2] Netns performance improvements

2016-07-05 Thread Phil Sutter
Hi, On Tue, Jul 05, 2016 at 04:42:51PM +0200, Phil Sutter wrote: > Stress-testing OpenStack Neutron revealed poor performance of 'ip netns' > when dealing with a high amount of namespaces. The cause of this lies in > the combination of how iproute2 mounts NETNS_RUN_DIR and the netns files > therei

[iproute PATCH 0/2] Netns performance improvements

2016-07-05 Thread Phil Sutter
Stress-testing OpenStack Neutron revealed poor performance of 'ip netns' when dealing with a high amount of namespaces. The cause of this lies in the combination of how iproute2 mounts NETNS_RUN_DIR and the netns files therein and the fact that systemd makes all mount points of the system shared.