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SubjectRe: 2.6.18 is problematic in VMware
Jan Engelhardt wrote:
>> My experience with VMware on several recent processors (mostly P-M family)
>> is that it crawls unless I force this first:
>> echo 1 > /sys/module/processor/parameters/max_cstate
>>
>
> My host processor is non-throttable
> Uni-processor.
>
> I tried with some kernels (hey, vmware had serial ports?)
> For whatever reason, the timecounting is not accurate.
> As you can see, the time difference between "WP bit" and the calibration
> thing is less than half a second inside the guest, but on the host,
> the delay is several seconds.
> The Capture Movie feature gets it right
> http://jengelh.hopto.org/f/2618delay.avi
>

I see a large delay _before_:

Calibrating delay using timer specific routine.. (lpj==

The lpj value is 38x the host lpj host value. Booting with lpj="some
random number" removes the stall for me. And finally, breaking into
kernel in this stall period consistently shows EIPs in calibrate_delay
in backtrace.

> One can see that it pauses before calibration (already mentioned that)
> and once again after NET: ... during IP init!? What's going on :(
>

The NET: pause has always been there, I think it just becomes much more
noticeable if the lpj value is 38x normal.

Conclusion: you are getting bad lpj computation during beginning.
Doesn't appear to be a kernel bug, so let's take it off list. You can
bring it up on VMTN
http://www.vmware.com/community/index.jspa?categoryID=1 for more
on-topic support. In fact, interesting test you can try - suspend /
resume during the hang. Does the discontinuity during calibration make
it go away?

Zach
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