How can I check whether the POE kernel is indeed using epoll or not?

use POE::Kernel;
print POE::Kernel::poe_kernel_loop;   # --> POE::Loop::Select
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or:

use POE::Kernel { loop => 'POE::XS::Loop::EPoll' };
print POE::Kernel::poe_kernel_loop;   # --> POE::XS::Loop::EPoll
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and the tricky one:

use POE::Kernel;
use POE::Kernel { loop => 'POE::XS::Loop::EPoll' };
print POE::Kernel::poe_kernel_loop;   # --> POE::Loop::Select
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