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[PATCH] spufs: set irq affinity for running threads

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For far, all SPU triggered interrupts always end up on
the first SMT thread, which is a bad solution.

This patch implements setting the affinity to the
CPU that was running last when entering execution on
an SPU. This should result in a significant reduction
in IPI calls and better cache locality for SPE thread
specific data.

Signed-off-by: Arnd Bergmann <arndb@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Arnd Bergmann
2006-01-05 14:05:29 +00:00
committed by Paul Mackerras
parent aeb013772a
commit 2fb9d20636
5 changed files with 41 additions and 16 deletions
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1
arch/powerpc/platforms/cell/interrupt.h
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@@ -54,6 +54,7 @@ extern void iic_setup_cpu(void);
extern void iic_local_enable(void);
extern void iic_local_disable(void);
extern u8 iic_get_target_id(int cpu);
extern void spider_init_IRQ(void);
extern int spider_get_irq(unsigned long int_pending);