Monday, 2019-07-29

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Luzi#startmeeting image_encryption13:00
openstackMeeting started Mon Jul 29 13:00:32 2019 UTC and is due to finish in 60 minutes.  The chair is Luzi. Information about MeetBot at http://wiki.debian.org/MeetBot.13:00
openstackUseful Commands: #action #agreed #help #info #idea #link #topic #startvote.13:00
*** openstack changes topic to " (Meeting topic: image_encryption)"13:00
openstackThe meeting name has been set to 'image_encryption'13:00
rosmaitao/13:00
Luzi#topic Roll Call13:00
*** openstack changes topic to "Roll Call (Meeting topic: image_encryption)"13:00
* fungi waves to all the nice people13:00
Luzigood morning everyone13:01
rosmaitagood morning13:01
moguimaro/13:01
redrobot\o13:04
mheno/13:04
Luzi#topic Barbican Consumer API Update13:04
*** openstack changes topic to "Barbican Consumer API Update (Meeting topic: image_encryption)"13:04
efriedo/13:05
moguimarI have this on my plate to start working tomorrow13:05
Luziokay, that does sound good :)13:05
Luzi#topic Image Encryption Specs13:07
*** openstack changes topic to "Image Encryption Specs (Meeting topic: image_encryption)"13:07
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Luzias i thought, we didn't met the spec freeze with all three specs13:07
Luzinow only the cinder one got merged13:08
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rosmaitayou may still have time on glance, erno tends to have a late spec freeze13:09
fungiso the nova spec didn't make it for this cycle?13:10
Luzii'm on the fence, whether it would be good to still land this or maybe it merged at the beginning of the next cycle13:10
Luzithe problem is, that our changes in glance and nova depend on the Barbican secret consumers13:11
rosmaitaLuzi: my advice it to land it if possible so that it's out of the way13:11
Luzirosmaita, okay do you know when the spec freeze is for glance?13:11
rosmaitaunless the consumer API is going to change in some major way during implementation13:12
rosmaitaLuzi: i do not, but it's definitely before M-313:12
fungiis there a feel for how close the nova spec was to being approved before the freeze?13:12
Luziwe got a +2 from efried13:12
fungistill a lot of rewrites requested, or just not enough reviews?13:12
efriedI feel like the nova spec was pretty close, but I couldn't seem to rouse enough interest for that second +2 in the end.13:13
efriedThere's a "spec freeze exception" process which is the obvious next step13:13
efriedif all the other stars are aligned and you feel like you still want the nova side in Train.13:13
rosmaitai imagine you'll be in a strong position if the other specs are approved and the consumer API implementation is underway13:13
fungiyeah, i wouldn't want to count this out just yet, if it's a coordinated effort involving entangled specs in three projects and the others merge or look like they're going to for this cycle13:13
rosmaita(basically, what efried said)13:13
efried#link nova spec freeze exception process http://lists.openstack.org/pipermail/openstack-discuss/2019-July/008060.html13:13
Luziyes it would be good to have all three specs accepted in this cycle13:15
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Luziefried, I will ask for an sfe after this meeting13:15
Luzirosmaita, I will also speak to erno about the spec freeze and the spec itself13:16
rosmaitai'm the one holding up the glance spec, let me know if you have any questions about my comments13:17
LuziI will look into them again :)13:18
rosmaitaok, cool, i will try to respond as quickly as possible13:18
Luziare there any more questions regarding the specs?13:19
efriedLuzi: Note that the next meeting is going to be in the middle of the night for you.13:20
Luzi#topic Open Discussion13:20
*** openstack changes topic to "Open Discussion (Meeting topic: image_encryption)"13:20
efriedDo you have a US timezone delegate you can send?13:20
efriedOr you can just try to do everything via email.13:20
Luziefried, no, I don't have..13:20
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efriedOtherwise, the meeting the following week is in a good time for EU13:21
Luzibut I have sleeping problems so I might be awake :D13:21
efriedbut that's getting pretty far into the cycle.13:21
efriedI feel like if we could get johnthetubaguy to have another look, it might go.13:21
efriedHe wasn't around last week13:21
Luziefried, that would be nice, 11pm might be late for a work day, but still managable I think13:22
Luziare there other topics, questions, problems?13:23
Luzidoesn't seem to be the case13:26
Luzithank you for joining this meeting :)13:26
rosmaitayou're welcome!13:27
Luzi#endmeeting image_encryption13:27
*** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings/"13:27
openstackMeeting ended Mon Jul 29 13:27:09 2019 UTC.  Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4)13:27
openstackMinutes:        http://eavesdrop.openstack.org/meetings/image_encryption/2019/image_encryption.2019-07-29-13.00.html13:27
openstackMinutes (text): http://eavesdrop.openstack.org/meetings/image_encryption/2019/image_encryption.2019-07-29-13.00.txt13:27
openstackLog:            http://eavesdrop.openstack.org/meetings/image_encryption/2019/image_encryption.2019-07-29-13.00.log.html13:27
fungithanks Luzi!13:27
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mlavalle#startmeeting neutron_performance16:00
openstackMeeting started Mon Jul 29 16:00:51 2019 UTC and is due to finish in 60 minutes.  The chair is mlavalle. Information about MeetBot at http://wiki.debian.org/MeetBot.16:00
openstackUseful Commands: #action #agreed #help #info #idea #link #topic #startvote.16:00
*** openstack changes topic to " (Meeting topic: neutron_performance)"16:00
openstackThe meeting name has been set to 'neutron_performance'16:00
rubasovhi16:01
slaweqhi16:01
haleybhi16:01
mlavallelet's wait one minute and we get going16:01
mlavallewell, I see haleyb is already here and I know njohnston won't attend16:02
mlavalleso let's get going16:02
mlavalle#topic Updates16:02
*** openstack changes topic to "Updates (Meeting topic: neutron_performance)"16:02
mlavallerubasov merged our port binding scenario rally-openstack: https://review.opendev.org/#/c/662781/16:03
mlavalleI've been playing with it the past few days16:03
mlavalleThanks and gret job!16:03
rubasovI hope it's being useful16:03
mlavalleit is being useful16:04
rubasovthen I'm happy16:05
mlavalleand I have to point out that it is going to be even more useful for https://bugs.launchpad.net/neutron/+bug/183683416:05
openstackLaunchpad bug 1836834 in neutron "[RFE] introduce distributed locks to ipam" [Wishlist,Confirmed] - Assigned to qinhaizhong (qinhaizhong)16:05
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mlavallethis is RFE that we approved this past Friday. We need a Rally test to check how much progres we make with that RFE16:06
mlavalleand I think your rally test is the perfect match for that16:06
mlavallewhat do you think slaweq?16:06
slaweqI agree, with this rally scenario we can exactly measure improvement (or not) which will give us this lock to ipam16:07
slaweqas in other "port_create" scenarios I think it's not allocating IP addresses, right?16:07
slaweqor is it?16:07
mlavalleexactly16:07
mlavallethis is the rally test that allows us to exercise the IPAM16:07
mlavalleso really useful rubasov16:08
mlavalle\o/16:08
slaweqthx rubasov for this :)16:08
rubasovcool, when I as writing it I was thinking of adding some options to tune the IP contention16:08
rubasovI mean how many IPs out of how large pool16:09
rubasovlet me know if that's needed16:09
rubasovit could be added easily16:09
mlavallelet me think about it, now that I am playing with it16:09
rubasovok16:10
mlavalleany other udates from you rubasov?16:10
rubasova bit16:10
rubasovI know slaweq has already seen these changes16:10
rubasovI have made some progress with osprofiling a vif plug16:10
rubasovtogether with gibi16:11
rubasovthese two changes: https://review.opendev.org/666610 https://review.opendev.org/66571516:11
rubasovI have some feedback from ralonsoh to fix16:11
rubasovand also some ugly interdependent unit test failures to fix too16:12
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rubasovbut the main point is that those two patches now can get a trace through ovs-agent16:12
mlavalleI took a quick look at these patches Friday (I think)16:12
rubasovfrom nova through ovs-agent and back to neutron-server16:12
ralonsohI still have some concerns about storing so much information in the bridge register16:13
rubasovralonsoh: sorry I did not have the time to answer yet16:13
ralonsohrubasov, no problem16:13
ralonsohno rush16:13
rubasovbut I think it should not be that much info there16:13
rubasovit depends on the number of cuncurrent traces16:13
rubasovwhich can only come from trusted users16:13
rubasovthat number does not scale together with the number of ports on an agent16:14
ralonsohno, for sure16:14
rubasovbut with the number of concurrent traces16:14
slaweqralonsoh: yes, IIUC rubasov's patch it will remove any trace-id from br-int just after use it16:14
ralonsohbut I don't want also to leave not needed info in the bidge register16:14
ralonsohif so, that's ok for me16:14
slaweqbut rubasov please correct me if I'm wrong :)16:15
ralonsohand eventually, once Sean merges the patch in nova, we'll put everyting in the port register16:15
rubasovralonsoh: by default ovs-agent removes the trace info as soon as it sees it16:15
rubasovralonsoh: on the other hand I fully agree that it's an ugly hack to put trace info there :-)16:16
rubasovand I'd like to see Sean's patch merged16:16
rubasovI'm just not sure I want to make it a dependency16:16
ralonsohnot for now16:17
rubasovralonsoh: also I could add some extra cleanup16:17
ralonsohperfect16:17
rubasovlike deleting all trace info from the bridge on ovs-agent restart16:17
rubasovwould that be better?16:18
ralonsohfor sure!16:18
rubasovthen I'll do that16:18
rubasovlet me know if you see other places in the code where we can do some meaningful cleanup16:19
rubasovunless you have some questions about these patches that's all from me16:20
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mlavallethanks for the update. and thanks to ralonsoh for helping with this :-)16:20
rubasovyep thanks16:21
ralonsoh0/16:21
mlavalleOn my side, as I indicated above, I've been running the create_bind_port scenario16:22
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mlavalleI creatde reports and posted them here: https://github.com/miguellavalle/neutron-perf/tree/july-29th/threadripper16:23
mlavalleIf you go to the reports folder, you will see the different runs, where I increase the number of iteration and the concurrency gradually16:24
mlavalleI also created a quick overview of results here: http://paste.openstack.org/show/755065/16:24
slaweqso it looks for me that using osprofiler is slowing down everything a lot16:26
mlavalleAs you can see, we went from an average duartion of 63.282 secs with 10 iteration, concurrency 516:26
mlavalleyes, it does16:26
mlavallebut at least for the time being it is a good window into what it is going on16:27
rubasovbut still the trends with osprofiler should be the same as without it, right?16:27
mlavalleI don't think we should focus on the absolute durations16:27
mlavallewe should focus on the trend16:27
rubasovso we should still see how it scales16:27
mlavalleexactly rubasov16:27
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slaweqI agree16:28
slaweqI am just surprised that it has so much overhead16:28
mlavalleit is a lot of overhead16:28
mlavallebut if you think about it, it's not surprising16:28
mlavallewe are logging each DB operation16:29
mlavalleanyway...16:29
rubasova lots of I/O to send to the trace point db16:29
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mlavallegoing back to my oririnl comment, with 80 iterations, 20 concurrency, we go to average duration of 147.88716:30
mlavallein that report folder you will find the rally report (for example iterations-10-concurrency-5.html) with one or several corresponding osprofiler reports (for example iterations-10-concurrency-5-osprofiler-max.html)16:33
mlavalleif the osprofiler report name contains the 'max' suffix, it means that it referes to the iteration with the largest duration16:34
rubasovwhat looks good is that there's not much of a spread, the 95 percentile values are close to the median values16:35
rubasovso neutron-server seems to be performing at a consistent speed16:35
slaweqrubasov: slow but stable :D16:36
rubasovand based on the first two we may need to divide the numbers by 5 (the slowdown because of osprofiler)16:36
mlavallewould that be an indication that we haven't reached a limit? i.e. the performance knee wehere response time grows exponentially?16:37
mlavalleI mean the fact that the 95th percentile is still close to the median?16:37
jrbalderramaBTW any plan to perform more test with more physical resources to compare the results with and w/o the profiler ?16:38
rubasovI don't think the spreads in itself tells much about bottlenecks16:39
rubasovor at least I don't see how16:39
mlavallefair point16:39
rubasovother than we're likely hitting the same cause of slowness in each run16:39
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rubasovso if we can improve that we'll likely improve all runs16:40
mlavalleI haven't identified a big / single obvious bottleneck in the case of port creation and update. so it going to require a very fine grained analysys of the reports, which I will attempt as my next step16:41
mlavalleBut in the case of subnet creation I found what seems to be a tentative surprise16:41
rubasovthis is already very cool, thank you16:41
slaweqmlavalle: one more question: what are those sql update queries in Your summary?16:42
mlavalleIf you look at lines 75-78 and 99-100 in my summary....16:42
mlavalleyou will see SQL update statements that are executed during subnet creation16:43
mlavallein the 60 / 15 and 80 / 20 scenarios I can see that those SQL statements take arounf 8 to 9 seconds16:43
mlavallewhile the total subnet creation time is arounf 25 30 seconds16:44
mlavalleam I being clear?16:44
slaweqso those are slowest queries in subnet creation requests, right?16:45
slaweqin fact it's always the same query16:45
mlavalleexactly16:45
mlavallelet's take this as tentative yet16:45
mlavalleI just found this last night16:45
mlavallebut it really stands out16:45
slaweqok16:46
rubasovdo you have multiple query lines because we're hitting a db_retry?16:46
mlavalleyeah, I need to investigate and relate this to the code and the log files16:46
mlavallebut retries are clearly a possibility16:47
rubasovok16:47
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mlavalleand I also need to compare a port creation / update in the 10 / 5 scenario with their conterpart in the 80 / 20 scenario16:48
mlavallebecaause in that case there is not a single operation that stands out16:48
mlavallebut clearly a lot of small operations are adding up to a big increase in time16:48
mlavallemakes sense?16:49
slaweqyes16:50
mlavalleany more questions or observations16:50
mlavalle?16:50
rubasovyes it does16:50
slaweqI don't have anything else to add16:50
mlavallejrbalderrama: yes, that's the plan lomger term16:51
mlavallebut before getting there, I would like to have deeper knowledge on where bottlenecks are16:51
mlavalleso we can perform a very enlightening experiment16:52
mlavalleand btw, thanks for attending16:52
mlavalleand Viva Colombia! I bet all your French buddies are disappointed16:52
ralonsohhahahah16:53
slaweqLOL16:53
jrbalderramahahaha we still are the champions in other sports ;) and the tour is a French heritage !16:54
mlavallethat's true16:54
mlavalleit is a big victory for the Colombians, though16:55
jrbalderramaback to the the point. Sounds good for me. We are looking forward to launch some tests here16:55
mlavalleok, we'll keep you posted16:55
jrbalderramathank you all!16:55
mlavalleno rush on the PR16:56
mlavalleanything else we should discuss today?16:56
slaweqnot from me16:57
rubasovneither from me16:58
mlavalleThanks for attending!16:58
mlavalle#endmeeting16:58
*** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings/"16:58
openstackMeeting ended Mon Jul 29 16:58:23 2019 UTC.  Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4)16:58
openstackMinutes:        http://eavesdrop.openstack.org/meetings/neutron_performance/2019/neutron_performance.2019-07-29-16.00.html16:58
ralonsohbye16:58
openstackMinutes (text): http://eavesdrop.openstack.org/meetings/neutron_performance/2019/neutron_performance.2019-07-29-16.00.txt16:58
rubasovthank you16:58
slaweqthx and see You16:58
openstackLog:            http://eavesdrop.openstack.org/meetings/neutron_performance/2019/neutron_performance.2019-07-29-16.00.log.html16:58
slaweqo/16:58
rubasovbye16:58
jrbalderramabye16:58
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