From owner-freebsd-stable@freebsd.org  Mon Aug 24 19:29:31 2015
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Date: Mon, 24 Aug 2015 22:29:26 +0300
From: Slawa Olhovchenkov <slw@zxy.spb.ru>
To: stable@freebsd.org
Subject: dev.ix.0.queueX.interrupt_rate
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I have '82599ES 10-Gigabit SFI/SFP+ Network Connection' and see
strange:

# sysctl dev.ix.0 | grep interrupt_rate
dev.ix.0.queue7.interrupt_rate: 500000
dev.ix.0.queue6.interrupt_rate: 500000
dev.ix.0.queue5.interrupt_rate: 31250
dev.ix.0.queue4.interrupt_rate: 31250
dev.ix.0.queue3.interrupt_rate: 31250
dev.ix.0.queue2.interrupt_rate: 500000
dev.ix.0.queue1.interrupt_rate: 500000
dev.ix.0.queue0.interrupt_rate: 500000

Last -stable, no tuning. Is this normal?