[Bug 638434] Re: Freeze on Toshiba NB300 without external interrupts

[Jason Barnett]

OK, I did a bit of quick comparisons of the different workarounds and
the power usage as reported in powertop.

nolapic:                            11.2W  97% of it's time in c4wait,
97% running at 1Ghz

nohz=off:                          11.6W  98% of it's time  polling,
100% running at 1GHz

clocksource=jiffies:           12.6W  99.5% of it's time polling,
50% running at 1.6GHz, 50% running at 1GHz

BIOS option "always low"  11.2W  59% of it's time in c1wait, 36% in
c4wait      (always running at 1GHz)


These were taken with simply booting, logging in and running powertop then letting the readings settle for about 5 minutes.  I did not touch the system during this time.  It would be better to run while doing specific tasks, but that is harder to replicate and I just wanted some down-n-dirty numbers.  I think I will be sticking with the nolapic kernel option.

Hope this helps a bit and that we can find a fix to make this
information obsolete.  :)

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Freeze on Toshiba NB300 without external interrupts
https://bugs.launchpad.net/bugs/638434
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