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Re: TREE_SRCU slows hotplug by factor ~16

From Mike Galbraith <efault@gmx.de>
Newsgroups linux.kernel
Subject Re: TREE_SRCU slows hotplug by factor ~16
Date 2017-04-26 18:00 +0200
Message-ID <tAxwf-4hS-49@gated-at.bofh.it> (permalink)
References (5 earlier) <tzP2a-Rd-7@gated-at.bofh.it> <tAhhL-2cM-11@gated-at.bofh.it> <tAwgO-3vw-15@gated-at.bofh.it> <tAx3d-46S-37@gated-at.bofh.it> <tAxmy-4e9-27@gated-at.bofh.it>
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On Wed, 2017-04-26 at 08:44 -0700, Paul E. McKenney wrote:
> On Wed, Apr 26, 2017 at 05:26:20PM +0200, Mike Galbraith wrote:
> > On Wed, 2017-04-26 at 07:31 -0700, Paul E. McKenney wrote:
> > 
> > > And a sneak preview, semi-tested.  If you get a chance to run this, please
> > > let me know now it goes.
> > 
> > That took 'time stress-cpu-hotplug.sh' down to 48s, close to classic.
> 
> Woo-hoo!!!  ;-)
> 
> And thank you for your testing efforts!
> 
> Should I be comparing this with the 55s number from your initial email,
> or to the 39s number?

Should be the 39, but I'll get you a new tree vs classic number in this
same tree after I finish bisecting TSC going wonky.

	-Mike

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Re: TREE_SRCU slows hotplug by factor ~16 "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-04-26 00:40 +0200
  Re: TREE_SRCU slows hotplug by factor ~16 "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-04-26 16:40 +0200
    Re: TREE_SRCU slows hotplug by factor ~16 Mike Galbraith <efault@gmx.de> - 2017-04-26 17:30 +0200
      Re: TREE_SRCU slows hotplug by factor ~16 "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-04-26 17:50 +0200
        Re: TREE_SRCU slows hotplug by factor ~16 Mike Galbraith <efault@gmx.de> - 2017-04-26 18:00 +0200
          Re: TREE_SRCU slows hotplug by factor ~16 "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-04-26 18:10 +0200
          Re: TREE_SRCU slows hotplug by factor ~16 Mike Galbraith <efault@gmx.de> - 2017-04-26 19:50 +0200
            Re: TREE_SRCU slows hotplug by factor ~16 "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-04-26 20:00 +0200
              Re: TREE_SRCU slows hotplug by factor ~16 Mike Galbraith <efault@gmx.de> - 2017-04-26 20:20 +0200
                Re: TREE_SRCU slows hotplug by factor ~16 "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-04-26 20:30 +0200
                Re: TREE_SRCU slows hotplug by factor ~16 Mike Galbraith <efault@gmx.de> - 2017-04-27 05:50 +0200
                Re: TREE_SRCU slows hotplug by factor ~16 "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-04-27 06:20 +0200
                Re: TREE_SRCU slows hotplug by factor ~16 Mike Galbraith <efault@gmx.de> - 2017-04-27 06:20 +0200
                Re: TREE_SRCU slows hotplug by factor ~16 "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-04-27 07:40 +0200
                Re: TREE_SRCU slows hotplug by factor ~16 Mike Galbraith <efault@gmx.de> - 2017-04-27 07:50 +0200
                Re: TREE_SRCU slows hotplug by factor ~16 "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-04-27 14:40 +0200
            Re: TREE_SRCU slows hotplug by factor ~16 "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-04-26 20:00 +0200

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