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| anupn | so i am running runserver and it says server running at 127.0.0.1:8888 | 00:16 |
|---|---|---|
| anupn | ying_zuo, but when i try to run that inside browser it does not load | 00:16 |
| anupn | ying_zuo, i have set the level of logging to debug right now | 00:17 |
| anupn | trying again if i see anything | 00:17 |
| anupn | ying_zuo, i do not see anything on the console as i try to run the IP:PORT | 00:19 |
| anupn | here is the pastebin http://paste.openstack.org/show/622230/ | 00:19 |
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| ying_zuo | maybe try a different port? | 00:35 |
| anupn | ying_zuo, i am thinking somehow runserver is not running | 00:37 |
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| anupn | ying_zuo, but yes let me try to use different port, i may have to destroy my vagrant and do it again as other ports are not forwarded | 00:37 |
| anupn | ying_zuo, have you used horizon from vagrant? | 00:38 |
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| ying_zuo | anupn: I used it before until devstack changed to use the same port for keystone and horzion | 01:23 |
| ying_zuo | the port forwarding is tricky with vagrant | 01:23 |
| anupn | ying_zuo, yeah true | 01:24 |
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| adriant | Hello! I have some potentially silly questions around some odd stuff we noticed today when trying to debug horizon's slow performance. | 07:08 |
| adriant | We adding in our own profiling code to confirm certain elements, and overall found that the API calls took roughly around 4s out of a 8s page load on an instance list page reload | 07:09 |
| adriant | so... we began a long and weird process of trying to find where the hell those extra 4 seconds are coming form | 07:09 |
| adriant | from* | 07:09 |
| adriant | in the end that ended up us limiting our horizon service to one worker, and the stracing it's process to see what it did | 07:10 |
| adriant | we found that it kept opening and touching the nova policy file, over and over again when loading the permissions for the table actions. | 07:11 |
| adriant | so... with further hacking and debugging we noticed a 2-3second difference when we simply added a return true at the top of https://github.com/openstack/horizon/blob/master/horizon/tables/actions.py#L131-L138 | 07:11 |
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| adriant | thus bypassing all calls to oslo_policy and just making all the buttons show themselves regardless of the allowed status or what the policy wanted | 07:12 |
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| adriant | so now I'm digging into the code path for policy checking and trying to work out why we are seeing so much file access to the policy file. Which I then assume is followed by a json parse. Sure that isn't much time, but when you do for EACH table action, for each row... it adds up | 07:13 |
| adriant | based on this code it 'looks' like we are caching the policy enforcers, which in turn should mean that each of them only every loads the file once in a given process: https://github.com/openstack/django_openstack_auth/blob/master/openstack_auth/policy.py#L52-L70 | 07:16 |
| adriant | so... i'm curious, does that actually do what it is meant to? (need to edit the code and start debugging that myself) | 07:16 |
| adriant | then looking in https://github.com/openstack/oslo.policy/blob/master/oslo_policy/policy.py it sort of seems to have a reload param, which appears to default to false, so I can't see if we're potentially setting that to true somewhere by accident... | 07:17 |
| adriant | although I don't really know the oslo.policy code remotely | 07:17 |
| adriant | even* remotely | 07:18 |
| adriant | I may have to throw some debug statements there too and see what it might be doing.. | 07:18 |
| adriant | Soooo I've no clue where to go. And am curious of anyone knows this particular code path and is able to help me work out why this is so terrible inefficient so we can fix it! | 07:19 |
| adriant | Also, since this is an odd hour and this discussion is probably better not done in IRC, I'll write up an email about this and send it to the mailing list. Hopefully with less typos! :) | 07:27 |
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| openstackgerrit | Shu Muto proposed openstack/horizon master: Commonize load-edit directive https://review.openstack.org/483810 | 08:22 |
| openstackgerrit | Shu Muto proposed openstack/horizon master: Use load-edit directive in import key pair https://review.openstack.org/487689 | 08:22 |
| openstackgerrit | Shu Muto proposed openstack/horizon master: Adding identity ng-groups create action https://review.openstack.org/480426 | 08:24 |
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| e0ne | amotoki: hi. could you please test and review https://review.openstack.org/506190 and https://review.openstack.org/507560? These patches fix network selection on a legacy instance launch dialog | 08:48 |
| e0ne | amotoki: zuul is broken now, so CI marked the last one with -1 | 08:50 |
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| openstackgerrit | Marek Lyčka proposed openstack/horizon master: Added type checks for ha device owners https://review.openstack.org/508476 | 09:52 |
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| openstackgerrit | Ferenc Cserepkei proposed openstack/horizon master: Add "prev" link to instance page list pagination https://review.openstack.org/498018 | 13:23 |
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| robcresswell | adriant: It sounds interesting, but a lot of the policy code predates even my time here :/ So I'm not really familiar with it | 13:39 |
| robcresswell | adriant: If your digging uncovers anything, let us know. In the meantime, a writeup would be great | 13:40 |
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