Messages in this thread | | | Date | Thu, 29 May 2014 15:57:08 +0800 | From | Libo Chen <> | Subject | Re: balance storm |
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On 2014/5/28 17:08, Thomas Gleixner wrote: > On Wed, 28 May 2014, Libo Chen wrote: > >> On 2014/5/28 9:53, Mike Galbraith wrote: >>> On Wed, 2014-05-28 at 09:04 +0800, Libo Chen wrote: >>> >>>> oh yes, no tsc only hpet in my box. >>> >>> Making poor E5-2658 box a crippled wreck. >> >> yes,it is. But cpu usage will be down from 15% to 5% when binding >> cpu, so maybe read_hpet is not the root cause. > > Definitely hpet _IS_ the root cause on a machine as large as this, > simply because everything gets serialized on the hpet access. > > Binding stuff to cpus just makes the timing behaviour different, so > the hpet serialization is not that prominent, but still bad enough. > > Talk to your HW/BIOS vendor. The kernel cannot do anything about > defunct hardware.
I got it!
thanks, Libo
> > Thanks, > > tglx > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > >
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