Re: [PATCH 2.6.21-rt2] PowerPC: decrementer clockevent driver

2007-10-18 Thread Sergei Shtylyov
Sergei Shtylyov wrote: > Add PowerPC decrementer clock event driver. > Every effort has been made to support the different implementations of the > decrementer: the classic one (with 970 series variation), 40x and Book E > specific ones. > I had to make CONFIG_GENERIC_CLOCKEVENTS option selectabl

Re: [PATCH 2.6.21-rt2] PowerPC: decrementer clockevent driver

2007-07-10 Thread Segher Boessenkool
>>> This scales with the number of processors since there is one >>> decrementer per core (is it per thread on SMT chips? >>> I don't know). >> >> One per core. > > No, each thread has its own decrementer, but the timebase is shared. Argh, of course you're right, I'm reading the wrong ISA version

Re: [PATCH 2.6.21-rt2] PowerPC: decrementer clockevent driver

2007-07-10 Thread Paul Mackerras
Segher Boessenkool writes: > > This scales with the number of processors since there is one > > decrementer per core (is it per thread on SMT chips? > > I don't know). > > One per core. No, each thread has its own decrementer, but the timebase is shared. Paul. __

Re: [PATCH 2.6.21-rt2] PowerPC: decrementer clockevent driver

2007-07-10 Thread Segher Boessenkool
> This scales with the number of processors since there is one > decrementer per core (is it per thread on SMT chips? > I don't know). One per core. Segher ___ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linux

Re: [PATCH 2.6.21-rt2] PowerPC: decrementer clockevent driver

2007-07-10 Thread Gabriel Paubert
On Fri, May 18, 2007 at 05:52:45PM +0100, Matt Sealey wrote: > Kumar Gala wrote: > > > > On May 18, 2007, at 9:48 AM, Thomas Gleixner wrote: > > > >> On Fri, 2007-05-18 at 15:28 +0100, Matt Sealey wrote: > >>> > >>> I think both the MPC52xx GPT0-7 and the SLT0-1 fulfil this fairly > >>> easily. >