/proc/Schedstats statistics

jan.vipin · 07-10-2011, 08:54 PM

Hello All,

I am trying to understand the statistics posted by /proc/schedstat.
The documentation I could find on the subject was taken from here:

Linux Scheduler Statistics
http://eaglet.rain.com/rick/linux/sc...format-15.html

I am running a FC14
2.6.35.6-45.fc14.x86_64

Below is a dump for my statistics

version 15
timestamp 4356814703
cpu0 46540 0 96049852 39682767 50849563 28504181 6402127420973 1547256962507 55119801
domain0 00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000003 22495 21765 675 1037826 94 33 0 21765 5797 5345 416 1801124 55 0 1 5344 757236 702579 46725 114900414 9212 244 119 702460 44 13 31 0 0 0 0 0 0 375257 21494 0
domain1 00000000,00000000,00000000,00000000,00000000,00000000,00000000,0000000f 5593 4668 737 2285778 273 25 7 4661 5790 5750 34 266075 19 0 7 2801 374455 353235 19119 49007529 2851 30 4416 348819 17 4 13 0 0 0 0 0 0 93063 4192 0
...
Removed the rest of the cpu/domains

Can somebody please explain me that why my cpu fields (2-4) are not zero as suggested in the document ?
Also, the domain has more than 37 fields.

Am I doing something wrong ? or are the results different for x86 & x86_64 boxes?
Thanks.

(P.S. I am running an i5 with 4 cores)

jan.vipin · 07-10-2011, 09:01 PM

Just figured out that first eight fields for domain is a cpumask. Though, I don't know how to interpret that either.
Any help will be appreciated.
Thanks

---------- Post added 07-10-11 at 10:01 PM ----------

Just figured out that first eight fields for domain is a cpumask. Though, I don't know how to interpret that either.
Any help will be appreciated.
Thanks