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| mhen | #startmeeting image_encryption | 13:00 |
|---|---|---|
| openstack | Meeting started Mon Aug 12 13:00:36 2019 UTC and is due to finish in 60 minutes. The chair is mhen. Information about MeetBot at http://wiki.debian.org/MeetBot. | 13:00 |
| openstack | Useful Commands: #action #agreed #help #info #idea #link #topic #startvote. | 13:00 |
| *** openstack changes topic to " (Meeting topic: image_encryption)" | 13:00 | |
| openstack | The meeting name has been set to 'image_encryption' | 13:00 |
| mhen | #topic Roll Call | 13:00 |
| *** openstack changes topic to "Roll Call (Meeting topic: image_encryption)" | 13:00 | |
| rosmaita | o/ | 13:01 |
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| rosmaita | hmmm ... looks like a light turnout | 13:03 |
| redrobot | \o | 13:03 |
| * mhen is substitute for Luzi this and next week | 13:04 | |
| mhen | okay let's start | 13:05 |
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| mhen | #topic Barbican Consumer API Update | 13:05 |
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| *** openstack changes topic to "Barbican Consumer API Update (Meeting topic: image_encryption)" | 13:05 | |
| mhen | anybody present who can comment on the progress of this? | 13:05 |
| redrobot | I think moguimar is out on PTO today | 13:06 |
| redrobot | He's got a WIP patch up for review, let me find a link | 13:06 |
| redrobot | #link https://review.opendev.org/#/c/674302/ | 13:06 |
| redrobot | He should be picking it up again tomorrow when he returns to work. | 13:06 |
| mhen | good! | 13:07 |
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| mhen | anything else about the consumer API? | 13:09 |
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| * efried waves late | 13:09 | |
| mhen | efried, welcome :) | 13:09 |
| redrobot | That's all I have for now. I haven't started working on the client side of things, but it's on my to-do list | 13:10 |
| mhen | okay, good to hear ;) | 13:10 |
| mhen | next | 13:10 |
| mhen | #topic Image Encryption Specs | 13:10 |
| *** openstack changes topic to "Image Encryption Specs (Meeting topic: image_encryption)" | 13:11 | |
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| mhen | just as a heads-up, response time from our side will be slowed down over the next two weeks since Luzi is on vacation | 13:12 |
| mhen | any topics to discuss regarding the specs? | 13:13 |
| efried | I'm afraid the nova spec didn't get a freeze exception | 13:14 |
| efried | but I would encourage you to continue working on it to get it in shape to be approved early in U. | 13:14 |
| mhen | yes but it was a reasonable decision I think | 13:15 |
| efried | and that doesn't stop you working on the code as well. | 13:15 |
| mhen | right, we will continue to push the things forward :) | 13:15 |
| mhen | iirc, there are currently some questions still to be answered regarding the scope of our changes in regards to which hypervisor and backends will be supported etc. | 13:16 |
| mhen | we will work on better clarifying this in the specs | 13:17 |
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| * mhen still needs to check all the specs again which questions are still unanswered | 13:18 | |
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| mhen | anything else concerning the specs? | 13:19 |
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| mhen | okay then | 13:20 |
| mhen | #topic Open Discussion | 13:20 |
| *** openstack changes topic to "Open Discussion (Meeting topic: image_encryption)" | 13:20 | |
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| mhen | any other topic you'd like to discuss? | 13:21 |
| rosmaita | just a reminder that the os-brick Train release is week of 2 September | 13:21 |
| mhen | since we are targeting early U now, is this deadline relevant in any way? | 13:22 |
| rosmaita | guess not, though it would be good to have your brick work at a state where it will be useful for testing the other components | 13:23 |
| rosmaita | but the other implication is that after 2 Sept, master of brick will be U | 13:25 |
| mhen | so our brick stuff would need to be merged first I guess? | 13:25 |
| efried | is os-brick on an _independent release cycle? | 13:25 |
| rosmaita | efried: no, it's a cycle with intermediaries, i think | 13:25 |
| efried | confirmed | 13:26 |
| efried | Was going to say you could consider merging & releasing the os-brick function any time, assuming it's code paths that wouldn't get touched without the upcoming features. | 13:27 |
| efried | might still be able to do that | 13:27 |
| rosmaita | mhen: it's up to you when stuff merges and where; it's just that people will have to carry patched versions of stuff to work on other stuff ... can get complicated | 13:27 |
| rosmaita | i agree with efried that if the code changes are isolated, it's possible to do early releases from master | 13:28 |
| efried | especially with something as intertwined as this, trying to have a zillion Depends-On patches from a zillion different repositories is going to be complicated enough. Might as well simplify where you can. | 13:29 |
| mhen | sounds reasonable :) | 13:29 |
| mhen | we don't need a separate spec for the brick changes or do we? | 13:30 |
| rosmaita | i don't think so, the cinder team seemed OK with an update to the accepted spec | 13:30 |
| efried | who owns brick? cinder? It would be up to them | 13:30 |
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| rosmaita | Luzi said the oslo library proposal could be adapted to say what the interface would look like | 13:31 |
| rosmaita | that's really all that | 13:31 |
| rosmaita | 's needed, just some idea of what thsi will look like for the people who currently consume os-brick | 13:31 |
| rosmaita | from what i can tell, the cinder team is in agreement that os-brick is appropriate place for this | 13:32 |
| mhen | I see, I vaguely remember Luzi mentioning there was some request from the cinder team to supply some further addition to the merged spec | 13:34 |
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| rosmaita | Yeah, the current spec says the encryption code would be in a library like os-brick; just need to update that it will definitely be brick and what the interface will look like | 13:35 |
| mhen | rosmaita, I see. Thanks for the clarification. I still need to catch up with all the parts :) | 13:37 |
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| rosmaita | np, i guess my point is that you don't have to wait for U to start to get working on the os-brick stuff | 13:38 |
| mhen | okay thanks for pointing that out? | 13:41 |
| mhen | that wasn't meant to be an '?' :) | 13:42 |
| rosmaita | :D | 13:42 |
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| mhen | okay anything else? | 13:42 |
| mhen | okay thanks for participating! | 13:44 |
| mhen | have a nice week! | 13:45 |
| mhen | #endmeeting image_encryption | 13:45 |
| *** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings/" | 13:45 | |
| openstack | Meeting ended Mon Aug 12 13:45:16 2019 UTC. Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4) | 13:45 |
| openstack | Minutes: http://eavesdrop.openstack.org/meetings/image_encryption/2019/image_encryption.2019-08-12-13.00.html | 13:45 |
| openstack | Minutes (text): http://eavesdrop.openstack.org/meetings/image_encryption/2019/image_encryption.2019-08-12-13.00.txt | 13:45 |
| openstack | Log: http://eavesdrop.openstack.org/meetings/image_encryption/2019/image_encryption.2019-08-12-13.00.log.html | 13:45 |
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| fungi | oh, sorry mhen, i meant to mention i had to miss this week (was driving a car during the meeting), but will catch up on the log. thanks for chairing! | 14:12 |
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| mlavalle | #startmeeting neutron_performance | 16:00 |
| openstack | Meeting started Mon Aug 12 16:00:38 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 |
| openstack | Useful Commands: #action #agreed #help #info #idea #link #topic #startvote. | 16:00 |
| *** openstack changes topic to " (Meeting topic: neutron_performance)" | 16:00 | |
| openstack | The meeting name has been set to 'neutron_performance' | 16:00 |
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| bcafarel | o/ | 16:02 |
| mlavalle | hey | 16:03 |
| mlavalle | very hot summer in Paris, isn't it? | 16:03 |
| bcafarel | it is better now luckily :) | 16:04 |
| bcafarel | we did have a day with 42.5C (aka hot hot hot) | 16:04 |
| mlavalle | but back in mid July you were hitting 40C, right? around Bastille Day | 16:05 |
| bcafarel | yes I had a good timing on my holidays :) | 16:05 |
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| mlavalle | are homes, offices, cars and trains prepared for that kind of heat? | 16:05 |
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| bcafarel | well the offices were quite popular for a few days (and cars) | 16:06 |
| mlavalle | here is Austin, we hit 40+ most of July, all of August and 2 or 3 weeks in September. but our homes, offices and cars are prepared for it | 16:07 |
| bcafarel | but houses and public transportation were not a good place to be for a few days | 16:07 |
| bcafarel | yeah south of France has more houses with AC, but around Paris it is still very rare | 16:07 |
| bcafarel | that was not a productive day :'( | 16:08 |
| mlavalle | ok, let's assume the others are not attending | 16:08 |
| bcafarel | :) | 16:08 |
| bcafarel | yeah it sounds like a middle-of-August attendance level | 16:08 |
| mlavalle | so let's have a quick one this week, in the spirit of the summer slowdown | 16:08 |
| mlavalle | #topic Updates | 16:09 |
| *** openstack changes topic to "Updates (Meeting topic: neutron_performance)" | 16:09 | |
| * bcafarel still catching up on previous meetings logs | 16:10 | |
| mlavalle | last time I mentioned that the osprofiler output was dominated by traces for SQLAlchemy, which don't correlate very well with lines in the code | 16:10 |
| mlavalle | so I sent this message to the ML: http://lists.openstack.org/pipermail/openstack-discuss/2019-July/008104.html | 16:10 |
| mlavalle | I didn't get any responses, so this morning I forwarded the message directly to akurilin's email address | 16:12 |
| mlavalle | let's see if we get a follow up from him | 16:12 |
| mlavalle | in the mean time, given the lack of response, I decided to take an alternative path | 16:12 |
| * haleyb wanders in late | 16:13 | |
| mlavalle | I decided to instrument the the create_port and update_port code in the ML2 plugin with calls to cProfile | 16:14 |
| bcafarel | so to get detailed profiling just in the calls? | 16:16 |
| mlavalle | essentially I add profile = cProfile.Profile() and profile.enable() at the start of those methods | 16:16 |
| mlavalle | and the profile.disable() and profile.dump_stats('/tmp/xxx') at the end of the methods, where xxx changes depending whether it is create port or update port | 16:17 |
| mlavalle | with this I get a couple of files that then I can analyze with pstats | 16:17 |
| mlavalle | I sort the profile by cpu cumtime and then print the top 100 | 16:18 |
| mlavalle | this is whet I get: | 16:18 |
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| mlavalle | for create_port: http://paste.openstack.org/show/756173/ | 16:18 |
| mlavalle | for update_port: http://paste.openstack.org/show/756174/ | 16:19 |
| mlavalle | by the way, I call these two methods as part of a script that creates and binds a port | 16:19 |
| mlavalle | since this cycle has been the focus for our performance exercise | 16:20 |
| mlavalle | in the case of the port create, you get a lot of sqllchemy stuff at the top | 16:21 |
| mlavalle | but notice that there are 3 methods from the ipam | 16:21 |
| mlavalle | if you add their cumtime together, they are close to the top consumers of cumulative cpu time | 16:22 |
| mlavalle | so it seems we need to dig deeper there | 16:22 |
| mlavalle | and by the way, they might be the culprits of the sqlalchemy code high utiliztion | 16:22 |
| mlavalle | in the case of update_port | 16:24 |
| mlavalle | again, we get a lot of sqlalchemy code at the top | 16:24 |
| bcafarel | I remember from some time ago a post by jd to transform cprofile data in call trees (could help here to show if they do trigger a lot of sqlalchemy calls) | 16:24 |
| mlavalle | bcafarel: yeah, I'll get to tthat in a minute | 16:25 |
| bcafarel | :) | 16:25 |
| mlavalle | going back to the update_port trace, we also see that we spend a lot of time notifying from the dvr scheduler and dhcp | 16:26 |
| mlavalle | which is kind of surprising | 16:26 |
| mlavalle | so again, it seems we need to dig deeper then | 16:26 |
| mlavalle | then I came accross jd's blog post https://julien.danjou.info/guide-to-python-profiling-cprofile-concrete-case-carbonara/ | 16:27 |
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| * mlavalle ended up buying his book | 16:28 | |
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| mlavalle | https://scaling-python.com/ | 16:28 |
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| bcafarel | a worthy investment yes (and this was indeed the link I was thinking about) | 16:29 |
| mlavalle | so at this point I am generating call trees | 16:29 |
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| mlavalle | but it seems that it needs some massaging before being able to generate an actionable calls tree | 16:30 |
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| mlavalle | so my next step is to refine a bit the way I am gathering data with cProfile in the code | 16:30 |
| mlavalle | I am probably: | 16:30 |
| mlavalle | 1) going to create a decorator to decorate the methods that we want to profile. This decorator is still going to dump the output in /tmp, but I am going to add a time stamp, so we can save output for several calls | 16:31 |
| mlavalle | 2) with the above decorator, I am then going to run the the create and bind port scenario against my deployment, increasing the load gradually | 16:32 |
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| mlavalle | 3) with this, I am going to correlate the rally reports with the cProfile / calls trees | 16:33 |
| mlavalle | and see if we can get with more precise data | 16:33 |
| mlavalle | the very neat thing about this, is that we can point very precisely in the code where the bottlenecks are | 16:34 |
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| mlavalle | so that's my update for today | 16:35 |
| mlavalle | any comments? | 16:35 |
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| bcafarel | none, that looks promising | 16:36 |
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| mlavalle | cool | 16:36 |
| mlavalle | anything else we should discuss today? | 16:36 |
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| bcafarel | nothing for me, I did not find much time to work on perf topics recently :/ | 16:38 |
| mlavalle | ok, cool | 16:38 |
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| mlavalle | I really got excited last night when I started seeing all this coming together | 16:38 |
| mlavalle | I think we are on the right path | 16:39 |
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| mlavalle | ok | 16:41 |
| mlavalle | let's it a meeting | 16:41 |
| mlavalle | call it^^^ | 16:41 |
| bcafarel | :) | 16:41 |
| mlavalle | have a nice week | 16:41 |
| mlavalle | thanks for attending | 16:41 |
| bcafarel | same, see you around! | 16:41 |
| mlavalle | #endmeeting | 16:41 |
| *** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings/" | 16:41 | |
| openstack | Meeting ended Mon Aug 12 16:41:36 2019 UTC. Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4) | 16:41 |
| openstack | Minutes: http://eavesdrop.openstack.org/meetings/neutron_performance/2019/neutron_performance.2019-08-12-16.00.html | 16:41 |
| openstack | Minutes (text): http://eavesdrop.openstack.org/meetings/neutron_performance/2019/neutron_performance.2019-08-12-16.00.txt | 16:41 |
| openstack | Log: http://eavesdrop.openstack.org/meetings/neutron_performance/2019/neutron_performance.2019-08-12-16.00.log.html | 16:41 |
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