From: Tejun Heo <htejun@gmail.com>
To: lkml <linux-kernel@vger.kernel.org>
Subject: [QUESTION] The cost of local interrupt enable/disable
Date: Sat, 17 Sep 2005 23:00:09 +0900 [thread overview]
Message-ID: <432C2169.2090300@gmail.com> (raw)
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
next reply other threads:[~2005-09-17 14:00 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-17 14:00 Tejun Heo [this message]
2005-09-17 14:32 ` Anton Blanchard
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