* [POWERPC] minor paca optimisation
@ 2007-03-16 6:47 Stephen Rothwell
2007-03-16 17:18 ` Michael Neuling
0 siblings, 1 reply; 2+ messages in thread
From: Stephen Rothwell @ 2007-03-16 6:47 UTC (permalink / raw)
To: paulus; +Cc: ppc-dev
Move the slb_shadow_ptr field into the first cache line since it is
(like evrything there) read only after boot. It is in fact statically
initialised and there after only read.
Signed-off-by: Stephen Rothwell <sfr@canb•auug.org.au>
---
include/asm-powerpc/paca.h | 3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
--
Cheers,
Stephen Rothwell sfr@canb•auug.org.au
diff --git a/include/asm-powerpc/paca.h b/include/asm-powerpc/paca.h
index 0d3adc0..4de851d 100644
--- a/include/asm-powerpc/paca.h
+++ b/include/asm-powerpc/paca.h
@@ -70,6 +70,7 @@ struct paca_struct {
s16 hw_cpu_id; /* Physical processor number */
u8 cpu_start; /* At startup, processor spins until */
/* this becomes non-zero. */
+ struct slb_shadow *slb_shadow_ptr;
/*
* Now, starting in cacheline 2, the exception save areas
@@ -101,8 +102,6 @@ struct paca_struct {
u64 user_time; /* accumulated usermode TB ticks */
u64 system_time; /* accumulated system TB ticks */
u64 startpurr; /* PURR/TB value snapshot */
-
- struct slb_shadow *slb_shadow_ptr;
};
extern struct paca_struct paca[];
--
1.5.0.3
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [POWERPC] minor paca optimisation
2007-03-16 6:47 [POWERPC] minor paca optimisation Stephen Rothwell
@ 2007-03-16 17:18 ` Michael Neuling
0 siblings, 0 replies; 2+ messages in thread
From: Michael Neuling @ 2007-03-16 17:18 UTC (permalink / raw)
To: Stephen Rothwell; +Cc: ppc-dev, paulus
> Move the slb_shadow_ptr field into the first cache line since it is
> (like evrything there) read only after boot. It is in fact statically
> initialised and there after only read.
>
> Signed-off-by: Stephen Rothwell <sfr@canb•auug.org.au>
Acked-by: Michael Neuling <mikey@neuling•org>
> ---
> include/asm-powerpc/paca.h | 3 +--
> 1 files changed, 1 insertions(+), 2 deletions(-)
>
> --
> Cheers,
> Stephen Rothwell sfr@canb•auug.org.au
>
> diff --git a/include/asm-powerpc/paca.h b/include/asm-powerpc/paca.h
> index 0d3adc0..4de851d 100644
> --- a/include/asm-powerpc/paca.h
> +++ b/include/asm-powerpc/paca.h
> @@ -70,6 +70,7 @@ struct paca_struct {
> s16 hw_cpu_id; /* Physical processor number */
> u8 cpu_start; /* At startup, processor spins until */
> /* this becomes non-zero. */
> + struct slb_shadow *slb_shadow_ptr;
>
> /*
> * Now, starting in cacheline 2, the exception save areas
> @@ -101,8 +102,6 @@ struct paca_struct {
> u64 user_time; /* accumulated usermode TB ticks */
> u64 system_time; /* accumulated system TB ticks */
> u64 startpurr; /* PURR/TB value snapshot */
> -
> - struct slb_shadow *slb_shadow_ptr;
> };
>
> extern struct paca_struct paca[];
> --
> 1.5.0.3
>
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev@ozlabs•org
> https://ozlabs.org/mailman/listinfo/linuxppc-dev
>
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