yahoo-eng-team team mailing list archive

[sean mooney <smooney@xxxxxxxxxx>]

Public bug reported:

when using the cpu_share_set cpu_dedicated_set or
vcpu_pin_set(deprecated) it would be nice to be able to use a ter
syntax.

currently we support negated ranges

so on a 4 core host you can set 
^0-1,0-3 and the result will be {2,3}

it would be nice to be able to just set "^0-1" and have the same effect

note that if we made this change we would have to preserve backwards compatiabliyt
and it may be of limited use due to the fact we now have two ranages cpu_share_set and cpu_dedicated_set 

it would still allow you to do this however
cpu_share_set=1-10 cpu_dedicated_set=^0-10
to reserve core 0 for the os and core 1-10 for shared cpus and the rest for dedicated cpus.

** Affects: nova
     Importance: Wishlist
         Status: Triaged


** Tags: config numa

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https://bugs.launchpad.net/bugs/1871096

Title:
  when only a negation is specified for cpu_*_sets we should assume all
  cpus are vaild and subtract the negated cpus

Status in OpenStack Compute (nova):
  Triaged

Bug description:
  when using the cpu_share_set cpu_dedicated_set or
  vcpu_pin_set(deprecated) it would be nice to be able to use a ter
  syntax.

  currently we support negated ranges

  so on a 4 core host you can set 
  ^0-1,0-3 and the result will be {2,3}

  it would be nice to be able to just set "^0-1" and have the same
  effect

  note that if we made this change we would have to preserve backwards compatiabliyt
  and it may be of limited use due to the fact we now have two ranages cpu_share_set and cpu_dedicated_set 

  it would still allow you to do this however
  cpu_share_set=1-10 cpu_dedicated_set=^0-10
  to reserve core 0 for the os and core 1-10 for shared cpus and the rest for dedicated cpus.

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