Date: Wed, 21 Dec 2011 12:02:04 +0100 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-stable@freebsd.org Subject: Unbalanced timer interrupts under VMWare? Message-ID: <jcsebc$d7n$1@dough.gmane.org>
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I have a strange situation on a VMWare 5-hosted machine: # vmstat -i interrupt total rate irq1: atkbd0 74 0 irq6: fdc0 11 0 irq15: ata1 17 0 irq18: em0 42122 1 cpu0:timer 2246291 54 irq256: mpt0 141402 3 cpu1:timer 280800 6 Total 2710717 65 The cpu0 timer interrupt rate is 54 Hz and cpu1 rate is 6 Hz. The same is visible when monitoring the system in real time with "systat -vm". This is a default FreeBSD 9 RC3 amd64 system, HZ is the default 100. Unless the tickless kernel project has advanced more than I think, this looks like a problem... so I looked elsewhere and it turns out I cannot get more than about 55 interrupts/s with the disk controller either. Any ideas? I have another host running VMware 5 but only an 8-stable machine in it, which works fine. Does anyone else run 9.x on VMware 5? The host is a Xeon X3360 CPU (4 cores, no HTT, 2.8 GHz).
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