linux-kernel - low priority 2.6.29 curiosity in interrupt time accounting

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Message-ID: <49CB87F3.7060506@exegy.com>
Date:	Thu, 26 Mar 2009 08:49:39 -0500
From:	"Mr. Berkley Shands" <bshands@...gy.com>
To:	"linux-kernel" <linux-kernel@...r.kernel.org>
Subject: low priority 2.6.29 curiosity in interrupt time accounting

Under 2.6.28-8, top reports up to 78% "hi" hard interrupt time when (not 
using
NAPI) on heavy network traffic. top also reports up to 38% "hi" time for 
heavy infiniband traffic.
Under 2.6.29-0, top reports NO time in "si" or "hi", 100% idle, even while
processing the exact same heavy I/O load.
Is top not looking in the right place or did something else move?
The system load averages look right for the number of threads active.

Berkley

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