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Re: TREE_SRCU slows hotplug by factor ~16

From "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Newsgroups linux.kernel
Subject Re: TREE_SRCU slows hotplug by factor ~16
Date 2017-04-26 20:30 +0200
Message-ID <tAzRn-5Yn-7@gated-at.bofh.it> (permalink)
References (5 earlier) <tAxwf-4hS-49@gated-at.bofh.it> <tAzeG-5qR-7@gated-at.bofh.it> <tAzol-5vz-5@gated-at.bofh.it> <tAzol-5vz-3@gated-at.bofh.it> <tAzHH-5SI-5@gated-at.bofh.it>
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On Wed, Apr 26, 2017 at 08:12:10PM +0200, Mike Galbraith wrote:
> On Wed, 2017-04-26 at 10:56 -0700, Paul E. McKenney wrote:
> 
> > > OK, I do need to do more work.  My current guess is that I should have
> > > set the default for srcutree.exp_holdoff to 25*1000 instead of 50*1000.
> > > But I am sure that further data will show me the error of my ways.  ;-)
> 
> I can give that a go tomorrow (too crispy now).

Sounds good!  I think that validating a 75x reduction is good for 
today.  Get some rest!

> > Oh, and my I add your Tested-by?
> 
> Sure.

Done, thank you!

							Thanx, Paul

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Thread

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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