Hi Guys,
I have just tried the set idle_cpu_prefer_mwait = 0
setting as well, and was unable to boot up.
(I am running OpenSolaris build 134, a with couple of igb (Intel 1 Gbit ) NICs,
2 physical cpus ( Xeon 5520), 4 cores each, 2 hyperthreads per core.
The NICs are Intel 82576 on-motherboard
Groan. I'm such an idiot. I should have been more
precise in terms of where and when you get set this.
Sorry folks.
On Apr 22, 2010, at 11:11 AM, Richard Skelton wrote:
Hi Jim,
If I set set idle_cpu_prefer_mwait = 0 in /etc/system on a X2270 running
Solaris 10 10/09 s10x_u8wos_08a X86
I
OK.. so what is then the recommended action? Set this from MDB on boot?
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Just an update, setting either of the following variables in /etc/system
cpuid_feature_ecx_exclude
idle_cpu_prefer_mwait
causes the machine to go into endless reboot cycles.
Both of these variables can be set via mdb -kw jut fine.
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Another update,
The 2 settings mentioned seem to be beneficial. I no longer see the
sluggishness, running the same network load as before. I am extending the test
duration to overnight
to see if this really solved the issue for good.
Thanks to everybody for helping out.
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