linux-kernel - Why not distribute timer handlers on CPUs on SMP

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Message-Id: <2B624B3F-9338-4336-B4F6-D61B476DA255@gmail.com>
Date:	Wed, 6 Oct 2010 09:05:52 +0800
From:	bhs <haishan.bai@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	haishan.bai@...il.com
Subject: Why not distribute timer handlers on CPUs on SMP

Hello,

I am just curious about why handle the timer functions on a CPU serially but not distribute them over CPUs
even on a SMP system?

The timer wheel handler function __run_timers() serializes the timer functions on a CPU,
is there any design consideration that handling timers on a CPU is more reasonable than distribute them
over CPUs?

Best regards
Shan Hai--
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