Messages in this thread | | | Date | Sun, 22 Mar 2009 13:52:12 -0700 | From | "Paul E. McKenney" <> | Subject | Re: Question about usage of RCU in the input layer |
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On Sun, Mar 22, 2009 at 12:46:32PM -0700, Arjan van de Ven wrote: > On Sun, 22 Mar 2009 09:53:24 -0700 > "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> wrote: > > > > > How many synchronize_rcu() calls are you seeing on the boot path? > > > > > > I see 20 that hit the above code path (eg ones that wait) until > > > userspace starts. > > > > So with well-behaved readers, the full sequence would be worth > > something like 50-60 milliseconds. > > yeah it's about 10% if the total kernel boot time.. so it does start to > matter
Half-second boot, eh? That would indeed be impressive.
Thanx, Paul
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