Re: boot-time slowdown for measure_migration_cost

From: Prarit Bhargava <prarit_at_sgi.com>
Date: 2006-01-31 07:52:57
Prarit Bhargava wrote:
> 
> 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?
>>

Whoops.  Let's try that again:

Pristine (with build_sched_domains measurement):


[    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 (with build_sched_domains measurement):

[    9.942267] Brought up 64 CPUs
[    9.942930] Total of 64 processors activated (143654.91 BogoMIPS).
[    9.944032] build_sched_domains: beginmigration_cost=0,31854,38739
[   23.868304] build_sched_domains: end


P.

> 

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Received on Tue Jan 31 07:55:17 2006

This archive was generated by hypermail 2.1.8 : 2006-01-31 07:55:25 EST