linux-kernel - local timers vs APIC question

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Message-ID: <50C1D423.6000400@free.fr>
Date:	Fri, 07 Dec 2012 12:33:55 +0100
From:	Daniel Lezcano <daniel.lezcano@...e.fr>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: local timers vs APIC question

Hi All,

I have a question about the timers on the intel platform.

While looking at the /proc/interrupts on different hosts, I see for an
intel i7 or intel Xeon 5345, the IO-APIC-edge timer is rarely used and
the local timers are widely used but on Core 2 Duo T9500, the APIC timer
is more used than the local timers.

Why there is such difference ? Does anyone have a hint to investigate
why that happens ?

Thanks in advance

  -- Daniel
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