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Date: Tue, 18 Jun 2013 08:16:58 +0000
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Subject: Fwd: Avoid sharing interrupts in FreeBSD under ESXi
From: "C. L. Martinez" <carlopmart@gmail.com>
To: freebsd-net@freebsd.org, freebsd-virtualization@freebsd.org
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 Hi all,

 First, sorry for the cross-posting.

 I have installed a FreeBSD 8.4 vm under an ESXi 5.1 U1 server. All
works ok, except for interrupt usage between mpt and nic interfaces:

root@fbsdtst:~ # vmstat -i
interrupt                          total       rate
irq1: atkbd0                           6          0
irq6: fdc0                             9          0
irq16: em2 mpt2                   945924          1
irq17: em3 em6                   2124484          4
irq18: em0 em4 em7+              5950584         11
irq19: em1 em5 em8+           2317830055       4499
cpu0: timer                    206119496        400
Total                         2532970558       4916

 I have enabled the following options in loader.conf:

hw.pci.enable_msi="0"
hw.pci.enable_msix="0"

 without a result. Is it possible to avoid to share interrupts in
FreeBSD when it is running as a vm? Exists some kernel option to
resolve this (via sysctl or compiling a new kernel)?

Thanks.