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Linux AMIs test very slowly and have mobile tests broken.
08-28-2017, 10:55 PM
Post: #2
RE: Linux AMIs test very slowly and have mobile tests broken.
Stay away from t2 instances at all costs. It's not the root cause here but the variable performance is not suitable for performance testing. c4.large is pretty much the sweet spot for agents though in all cases it shouldn't be that much slower.

As far as logging into the VM's, when you start the instances you provide a ssh key to use and you use that to ssh in as the user "ubuntu". If you are starting them through the API then you need to make sure you are passing the key.

Possibly more useful for debugging the performance, if you pass "debug=1" as a test option, the linux agent will capture a full debug log with timestamps. A download link for the debug logs will be to the left of the waterfall thumbnails where the timeline downloads are.

As for mobile emulation, something else is going on. Are you using the device profiles in mobile_devices.ini (in which case it is mobile=1&mobileDevice=iPhone6) or are you using script commands to explicitly set the viewport, scale factor, etc? Of the public locations, the Mumbai location is using the same AMI (lots of others are using the linux agent) and it is emulating mobile file: https://www.webpagetest.org/result/17082...ab9bf377f/

Just a sanity check, were all 5 agents pulling work? Just wondering if something went wrong and only 2 or 3 were running.

Generally they should be slightly slower in processing but nowhere near that much slower. We migrated the HTTP Archive over from the Windows agents to Linux and maintained the same test thruput as before so something isn't working right.
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RE: Linux AMIs test very slowly and have mobile tests broken. - pmeenan - 08-28-2017 10:55 PM

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