Re: boot-time slowdown for measure_migration_cost

[Prarit Bhargava]

Tony,

> Might it be wise to see whether the 2% variation that I saw can be
> repeated on some other architecture?   Can someone else try
> this patch and post the before/after values for migration_cost from dmesg?



Ask and ye shall receive ... on the 64p/64G system.

Pristine:

[    9.942253] Brought up 64 CPUs
[    9.942904] Total of 64 processors activated (143654.91 BogoMIPS).
[    9.943995] build_sched_domains: start
[   32.108439] migration_cost=0,32232,39021
[   37.894391] build_sched_domains: end

Patched:

[    0.001307] Calibrating delay loop... 2244.60 BogoMIPS (lpj=4489216)
[    9.942308] Brought up 64 CPUs
[    9.942812] Total of 64 processors activated (143654.91 BogoMIPS).
[   18.080441] migration_cost=0,31934,38750
[   23.865993] checking if image is initramfs... it is

P.

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