[QUESTION] The cost of local interrupt enable/disable
From: Tejun Heo
Date: Sat Sep 17 2005 - 09:04:22 EST
Hello, guys.
I'm curious about the cost of local_irq_enable/disable()'s on various
architectures. I found a freebsd discussion thread by googling which
says that each takes 3 cycles on i386 (very cheap), but for Pentium4,
people are talking in the order of several hundreds cycles. Are these
correct? How about other architectures?
TIA.
--
tejun
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