Re: powerpc: mitigate impact of decrementer reset

2014-11-13 Thread Paul Clarke
On 11/12/2014 08:39 PM, Michael Ellerman wrote: On Wed, 2014-11-05 at 11:06 -0600, Paul Clarke wrote: On 10/07/2014 09:52 PM, Michael Ellerman wrote: On Tue, 2014-07-10 at 19:13:24 UTC, Paul Clarke wrote: This patch short-circuits the reset of the decrementer, exiting after the decrementer res

Re: powerpc: mitigate impact of decrementer reset

2014-11-12 Thread Michael Ellerman
On Wed, 2014-11-05 at 11:06 -0600, Paul Clarke wrote: > Sorry it took me so long to get back to this... > > On 10/07/2014 09:52 PM, Michael Ellerman wrote: > > On Tue, 2014-07-10 at 19:13:24 UTC, Paul Clarke wrote: > >> This patch short-circuits the reset of the decrementer, exiting after > >> the

Re: powerpc: mitigate impact of decrementer reset

2014-11-05 Thread Paul Clarke
Sorry it took me so long to get back to this... On 10/07/2014 09:52 PM, Michael Ellerman wrote: On Tue, 2014-07-10 at 19:13:24 UTC, Paul Clarke wrote: The POWER ISA defines an always-running decrementer which can be used to schedule interrupts after a certain time interval has elapsed. The decr

Re: powerpc: mitigate impact of decrementer reset

2014-10-08 Thread Preeti U Murthy
On 10/08/2014 08:22 AM, Michael Ellerman wrote: > On Tue, 2014-07-10 at 19:13:24 UTC, Paul Clarke wrote: >> The POWER ISA defines an always-running decrementer which can be used >> to schedule interrupts after a certain time interval has elapsed. >> The decrementer counts down at the same frequency

Re: powerpc: mitigate impact of decrementer reset

2014-10-07 Thread Michael Ellerman
On Tue, 2014-07-10 at 19:13:24 UTC, Paul Clarke wrote: > The POWER ISA defines an always-running decrementer which can be used > to schedule interrupts after a certain time interval has elapsed. > The decrementer counts down at the same frequency as the Time Base, > which is 512 MHz. The maximum v