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* [QUESTION] The cost of local interrupt enable/disable
@ 2005-09-17 14:00 Tejun Heo
  2005-09-17 14:32 ` Anton Blanchard
  0 siblings, 1 reply; 2+ messages in thread
From: Tejun Heo @ 2005-09-17 14:00 UTC (permalink / raw)
  To: lkml


  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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2005-09-17 14:00 [QUESTION] The cost of local interrupt enable/disable Tejun Heo
2005-09-17 14:32 ` Anton Blanchard

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