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| kata-irc-bot | <eric.ernst> @sebastien.boeuf hey, for https://github.com/kata-containers/runtime/pull/530/commits/9cb805957e13e480ee9edccb4a82ba40b8e104bb, can you verify it is definitely this patch (ie, repro local?) @gabriela.cervantes.te <-- | 16:25 |
|---|---|---|
| kata-irc-bot | <eric.ernst> And if so, can you update commit message to incl details of the failure introduced? | 16:26 |
| kata-irc-bot | <sebastien.boeuf> @eric.ernst yes, I am waiting for @gabriela.cervantes.te input on that, and I'll submit a detail commit message if confirmed | 16:26 |
| kata-irc-bot | <eric.ernst> Thx ya'l. | 16:27 |
| kata-irc-bot | <sebastien.boeuf> @eric.ernst PR updated | 16:35 |
| kata-irc-bot | <sebastien.boeuf> And let's see the result of the CI on the PR revert. If it's green, this PR is definitely the problem | 16:36 |
| kata-irc-bot | <sebastien.boeuf> I mean the original PR is definitely the problem | 16:36 |
| kata-irc-bot | <eric.ernst> hey @julio.montes I'm checking out https://github.com/kata-containers/runtime/pull/497 - had a qq | 16:39 |
| devimc | eernst, Hi | 16:42 |
| kata-irc-bot | <eric.ernst> ended up commenting there. Basically, i think it makes sense to merge with current default behavior kept | 16:42 |
| kata-irc-bot | <eric.ernst> and we shoudl open a second PR to have vsock get enabled by default. | 16:43 |
| kata-irc-bot | <eric.ernst> I want the functionality in now, but want to make sure CI infra exercises the change and that we have the performance improvements (I assume) measured. WDYT? | 16:43 |
| devimc | :) | 16:45 |
| davidgiluk | gwhaley: how do you extract ''component footprint' and 'system footprint' ? | 16:56 |
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| kata-irc-bot | <gabriela.cervantes.te> @sebastien.boeuf and @eric.ernst, I am currently running the K8s tests | 16:57 |
| kata-irc-bot | <eric.ernst> thx gaby | 16:58 |
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| gwhaley | hi @davidgiluk - we use PSS for component footprint - so look at the shim/proxy/qemu/runtime footprint on the host side | 16:58 |
| gwhaley | for system footprint we are looking at the reduction in 'free' memory on the host using either 'free' or /proc/meminfo - and we dump the system caches between to try and make it a steady/fair measure | 16:59 |
| gwhaley | I do need to go check that our PSS measures are doing the right thing - we had an architecture change from 1 shim to many shims for instance - we used to thus 'share' the shim PSS across all the containers | 16:59 |
| davidgiluk | it is one of those things that can be tricky | 17:00 |
| gwhaley | indeed. the three tools I trialled to measure PSS all gave slightly different answers ;-) Currently I use smem iirc | 17:02 |
| gwhaley | so, we monitor our PSS so we can try and detect if we are growing (or shrinking!) as a regression, but | 17:02 |
| gwhaley | system level is much more useful when we are looking at real 'density' - as QEMU refuses to launch (by default) when your 'free' (or maybe avail) drops below its requested VM mem size (unless you do some | 17:03 |
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| gwhaley | config over-rides - but the warnings in doing that are quite scary :-) ) | 17:03 |
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| davidgiluk | hmm, now I'm curious why/how you've got it to do that; I've been fairly mean to qemu in the past at creating odd sized VMs | 17:04 |
| gwhaley | @davidgiluk - I'd have to go look it up - but, iirc it is the 'overcommit' docs in the kernel doc tree - qemu (or rather the kernel KVM setup) won't let you overcommit by default. So for instance, we | 17:05 |
| gwhaley | cannot/do not try to allocate 'all of system memory' to every VM, as then you'd probably only get to launch one of them :-( | 17:05 |
| gwhaley | but, overcommit scared me - I'll leave that to the vendors to work out ;-) | 17:05 |
| * gwhaley will drop off soon - feel free to comment on the gdoc, I just opened comment rights | 17:06 | |
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