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    SubjectRe: balance storm
    On Wed, May 28, 2014 at 12:30:19PM +0200, Peter Zijlstra wrote:
    > On Wed, May 28, 2014 at 11:08:40AM +0200, 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.
    >
    > ---
    > Subject: x86: FW_BUG when the TSC goes funny on hardware where it really should be stable
    >
    > It happens far too often on 'consumer' grade hardware, and sometimes on
    > 'enterprise' too that the TSC gets marked unstable due to FW fuckage,
    > complain more loudly in this case.
    >
    > Signed-off-by: Peter Zijlstra <peterz@infradead.org>

    Acked-by: Borislav Petkov <bp@suse.de>

    --
    Regards/Gruss,
    Boris.

    Sent from a fat crate under my desk. Formatting is fine.
    --


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