Messages in this thread | | | Date | Thu, 15 Dec 2005 09:22:43 +0100 | From | Eric Dumazet <> | Subject | Re: [patch 3/3] x86_64: Node local pda take 2 -- node local pda allocation |
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Ravikiran G Thirumalai a écrit : > Patch uses a static PDA array early at boot and reallocates processor PDA > with node local memory when kmalloc is ready, just before pda_init. > The boot_cpu_pda is needed since the cpu_pda is used even before pda_init for > that cpu is called. > (pda_init is called when APs are brought on at rest_init(). But > setup_per_cpu_areas is called early in start_kernel and > sched_init uses the per-cpu offset table early)
That seems good, thank you !
Do you have an idea of the performance gain we could expect from this node local pda allocation ?
Say a CPU is on Node 1, was a change in pda (allocated on Node 0) immediatly mirrored on remote node or not ?
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