scheduler: filter device instance IDs by constraints #18141
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When the scheduler assigns a device instance, it iterates over the feasible
devices and then picks the first instance with availability. If the jobspec uses
a constraint on device ID, this can lead to buggy/surprising behavior where the
node's device matches the constraint but then the individual device instance
does not.
Add a second filter based on the `${device.ids}` constraint after selecting a
node's device to ensure the device instance ID falls within the constraint as
well.
Fixes: #18112
lgfa29
approved these changes
Aug 3, 2023
tgross
added a commit
that referenced
this pull request
Aug 3, 2023
When the scheduler assigns a device instance, it iterates over the feasible
devices and then picks the first instance with availability. If the jobspec uses
a constraint on device ID, this can lead to buggy/surprising behavior where the
node's device matches the constraint but then the individual device instance
does not.
Add a second filter based on the `${device.ids}` constraint after selecting a
node's device to ensure the device instance ID falls within the constraint as
well.
Fixes: #18112
tgross
added a commit
that referenced
this pull request
Aug 3, 2023
When the scheduler assigns a device instance, it iterates over the feasible
devices and then picks the first instance with availability. If the jobspec uses
a constraint on device ID, this can lead to buggy/surprising behavior where the
node's device matches the constraint but then the individual device instance
does not.
Add a second filter based on the `${device.ids}` constraint after selecting a
node's device to ensure the device instance ID falls within the constraint as
well.
Fixes: #18112
tgross
added a commit
that referenced
this pull request
Aug 3, 2023
When the scheduler assigns a device instance, it iterates over the feasible
devices and then picks the first instance with availability. If the jobspec uses
a constraint on device ID, this can lead to buggy/surprising behavior where the
node's device matches the constraint but then the individual device instance
does not.
Add a second filter based on the `${device.ids}` constraint after selecting a
node's device to ensure the device instance ID falls within the constraint as
well.
Fixes: #18112
|
Backported to 1.6.x, 1.5.x, and 1.4.x |
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When the scheduler assigns a device instance, it iterates over the feasible devices and then picks the first instance with availability. If the jobspec uses a constraint on device ID, this can lead to buggy/surprising behavior where the node's device matches the constraint but then the individual device instance does not.
Add a second filter based on the
${device.ids}constraint after selecting a node's device to ensure the device instance ID falls within the constraint as well.Fixes: #18112
See #18112 (comment) for reproduction steps.
Will get backported to 1.6.x, 1.5.x, and 1.4.x