How can I know the list of isolated cpu for the current running kernel?

Question

So far my application requests the list of isolated cpu in its configuration file. Then it uses pthread_setaffinity_np() in order to force running on that kind of cpu. Usually the guy who made the configuration file goes into the file /boot/grub/menu.lst and pick the correct entry, in order to know what is the current list of isolated cpu.

title CentOS (2.6.32-431.5.1.el6.x86_64)
        root (hd0,1)
        kernel ... isolcpus=4-15

So, I would like to avoid the guy to have to enter that list manually in the configuration file. Is there a possible way for my application to get that list programatically?

Answer 1

cat /sys/devices/system/cpu/isolated

Answer 2

Only in a very backwards way - /proc/cmdline has the current kernel command line which you can parse to get the parameters the kernel was booted with, including isolcpus