Open Bug 1829127 Opened 1 years ago Updated 1 year ago

Add telemetry needed to evaluate PHC

Categories

(Core :: Memory Allocator, task)

Product:
Core
Component:
Memory Allocator
Type:
task

Tracking

()

Status:
ASSIGNED

People

(Reporter: pbone, Assigned: pbone)

References

(Blocks 2 open bugs)

Details

We should add telemetry to measure PHC's utilisation. I'd like to know:

  • How many slots are allocated / freed / never used in each process.
  • How much metadata memory PHC requires in each process
  • How much fragmentation PHC causes in each process.
  • The distributions of process lifetimes.
  • Maybe the utilsation of PHC when a process terminates, did we ever use close to all the slots?
  • If we ever fail an allocation because all the slots are used?
  • How often we "reuse" a freed slot.
Blocks: 1849121

(In reply to Paul Bone [:pbone] from comment #0)

We should add telemetry to measure PHC's utilisation. I'd like to know:

  • How many slots are allocated / freed / never used in each process.
  • How much metadata memory PHC requires in each process
  • How much fragmentation PHC causes in each process.
  • The distributions of process lifetimes.
  • Maybe the utilsation of PHC when a process terminates, did we ever use close to all the slots?
  • If we ever fail an allocation because all the slots are used?
  • How often we "reuse" a freed slot.

For this bug we want to do only the first three. The others are lower priority and have their own Bug 1849121.

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