[Starlingx-discuss] how to get rt-kernel support ?

[Rai, Ankush]

Thank you for your response to this query. But I am still not clear on this. Are you saying that, the kernel-rt RPM will get installed only for “lowlatency” nodes?
If my understanding is correct then I have few more questions:


-    How can I set the node as “lowlatency” node? (Is there any documentation reference for this ?)

-    Can I make the controller node as a low low-latency node or is it possible for only worker nodes ?

-    What are the pre-requirement for a node to be a low-latency node ?

-    Post installation, is there a way to make a node as low-latency node ?


I have All-in-one-Duplex mode of deployment, both having “controller” personality  and “controller,worker” as subfunctions.

capabilities          | {u'stor_function': u'monitor', u'Personality': u'Controller-Active'}
capabilities          | {u'stor_function': u'monitor', u'Personality': u'Controller-Standby'}
personality           | controller
subfunctions          | controller,worker

Regards,
Ankush
From: Penney, Don <Don.Penney at windriver.com>
Sent: Thursday, September 24, 2020 12:51 AM
To: Rai, Ankush <Ankush.Rai at commscope.com>; starlingx-discuss at lists.starlingx.io
Subject: RE: how to get rt-kernel support ?

The kernel-rt RPM is installed on the “lowlatency” nodes. For AIO, you’d want to install AIO-lowlatency.  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌  ‌
External (don.penney at windriver.com<mailto:don.penney at windriver.com>)
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The kernel-rt RPM is installed on the “lowlatency” nodes. For AIO, you’d want to install AIO-lowlatency.

From: Rai, Ankush <Ankush.Rai at commscope.com<mailto:Ankush.Rai at commscope.com>>
Sent: Wednesday, September 23, 2020 3:05 PM
To: starlingx-discuss at lists.starlingx.io<mailto:starlingx-discuss at lists.starlingx.io>
Subject: [Starlingx-discuss] how to get rt-kernel support ?

Hi,

I couldn’t find the rpm for rt-kernel. Is starlingx comes up with rt-kernel support or it need to be patched ?

Any pointer to get the rt-kernel support ?

software_version       | 20.06
I am using the latest green image: http://mirror.starlingx.cengn.ca/mirror/starlingx/master/centos/latest_green_build/outputs/iso/bootimage.iso<http://secure-web.cisco.com/1XaBjIrnsla4yw1swS70D-c4YZi3Gwk3fVlMFfZ8kh2jZoeRyWzfjNtCFudYq_klY9V9Ich822XL2RhcKfuhEage23YzuYyRTEpvehrwknKUOg5mbD5Ci5S6rRANn9WYVS0S7I0kOJD1ErxSKWnPtDeLaYwfxmosv_umFY7x1CgyjeHfO-ENsQk8bUV-_BYXS6cPUqwoeS3XGYVpYtFugRR12uacP1I3x8eX9b2TfrhKVzL9H01z0Y_2V3WGHIqzJtD_WmfTzssYX1NFL4EP4vXW3o3cZDjXxMkH_HLxFz-JXWauMnPwANk4bpGe92t1q/http%3A%2F%2Fmirror.starlingx.cengn.ca%2Fmirror%2Fstarlingx%2Fmaster%2Fcentos%2Flatest_green_build%2Foutputs%2Fiso%2Fbootimage.iso>
Required rt-kernel patch: kernel-rt-3.10.0-693.2.2.rt56.623.el7.x86_64

Thanks,
Ankush
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