Thanks Jarno and Ben for looking into this issue . I had tried to backtrace this from 2.3 to 2.4 .
I found that I had started seeing this issue after f2c214029e1ac0c9bc0f7c2013fe178a6b08dd7f commit , however in that ovs-ofctl del-flows br-int dl_vlan=1 took long time to execute ( more than 30 mins) . In case of flow delete now , looks like ovs-vswitchd is sending "barrier-reply" even before flow deletion is completed . Thanks & Regards, Alok -----Original Message----- From: Jarno Rajahalme [mailto:ja...@ovn.org] Sent: Tuesday, April 12, 2016 7:02 AM To: Ben Pfaff <b...@ovn.org> Cc: Maurya, Alok Kumar (HP Networking) <alok-kumar.mau...@hpe.com>; discuss@openvswitch.org Subject: Re: [ovs-discuss] OVS 2.4 and 2.4 Flow deletion issue I tried with a bit simpler flows, like this: ovs-ofctl add-flow br-int hard_timeout=0,idle_timeout=0,priority=10,ip,cookie=0x$v,table=0,dl_vlan=$v,nw_src=9.16.$i.$j,actions=output:1 And while adding them one-by-one in my VM took 12 minutes (my dev VM has been very slow recently), the runtime of the deletion was not noticeable, i.e., a following flow dump returned right away. Deleting all 200 flows took maybe 2-3 seconds. I’m trying again with the exact flow reported, but I’d be surprised if the additional match fields would make a difference. This on tip of master. I’ll have to try again with releases 2.4 and 2.5. Jarno > On Apr 11, 2016, at 5:15 PM, Jarno Rajahalme <ja...@ovn.org> wrote: > > I’m looking into this, > > Jarno > >> On Apr 11, 2016, at 3:41 PM, Ben Pfaff <b...@ovn.org> wrote: >> >> Jarno, it seems likely that this has something to do with the >> transactional classifier implementation. Do you think so? Do you >> have any idea why deletions would be so slow? >> >> Thanks, >> >> Ben. >> >> On Mon, Apr 11, 2016 at 09:51:45PM +0000, Maurya, Alok Kumar (HP Networking) >> wrote: >>> Hi All, >>> >>> I am seeing that in OVS 2.4 and ovs 2.5 Bulk flow deletion is >>> taking huge time more than (30 mins) compared to ovs 2.3 where it >>> used to take 1-2 secs . >>> >>> Below are steps which I am following to reproduce the issue : >>> >>> >>> 1. Add 200K Flows >>> >>> ####### Sample Script to add 200 K Flows ###### >>> >>> >>> echo "Adding 200K Flows" >>> date >>> for v in {1..20} >>> >>> do >>> >>> for i in {1..250} >>> do >>> >>> for j in {1..40} >>> do >>> >>> ovs-ofctl add-flow br-int >>> hard_timeout=0,idle_timeout=0,priority=10,ip,cookie=0x5c38cfa3a668$v >>> ,table=0,dl_dst=fa:16:3e:af:69:a3,dl_vlan=$v,nw_src=9.16.$i.$j/32,in >>> _port=1,actions=output:1 >>> >>> done >>> done >>> >>> done >>> date >>> echo "Flows are added" >>> >>> echo "Dump-Flows" >>> ovs-ofctl dump-flows br-int |wc >>> date >>> >>> >>> ######## End Script #### >>> >>> >>> 2. Try to delete 10 k Flows () >>> >>> ovs-ofctl del-flows br-int dl_vlan=1 >>> >>> 3. Above command gets executed successfully , but looks like deletion >>> keep on happening in background . >>> 4. It takes more than 30 mins to complete it , during this >>> period if anyone executes any of below command it hangs without any >>> output . >>> >>> >>> ovs-ofctl dump-flows br-int >>> >>> or >>> >>> ovs-ofctl show br-int >>> >>> >>> 5. This issue is not seen in ovs 2.3 >>> >>> >>> Is there any solution for this issue ? >>> >>> >>> >>> >>> Thanks & Regards, >>> Alok >> >>> _______________________________________________ >>> discuss mailing list >>> discuss@openvswitch.org >>> http://openvswitch.org/mailman/listinfo/discuss >> > _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
