Keith Owens wrote on Friday, July 29, 2005 12:38 AM > BTW, for ia64 you may as well prefetch pt_regs, that is also quite > large. > > #define MIN_KERNEL_STACK_FOOTPRINT (IA64_SWITCH_STACK_SIZE + IA64_PT_REGS_SIZE) This has to be carefully done, because you really don't want to overwhelm number of outstanding L2 cache misses. It only has a limited amount of queue and once that is filled, cpu get into L2 recirculate state. And that is going to be very painful because it translate into cpu stall cycles. - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.htmlReceived on Fri Jul 29 04:13:26 2005
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