Messages in this thread | | | Date | Sat, 25 Aug 2007 09:52:23 -0700 | From | Randy Dunlap <> | Subject | Re: [PATCH 0/6] x86: Reduce Memory Usage and Inter-Node message traffic (v2) |
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On Sat, 25 Aug 2007 11:24:35 +0200 Andi Kleen wrote:
> On Fri, Aug 24, 2007 at 05:50:18PM -0700, Siddha, Suresh B wrote: > > On Fri, Aug 24, 2007 at 03:26:54PM -0700, travis@sgi.com wrote: > > > Previous Intro: > > > > Thanks for doing this. > > > > > In x86_64 and i386 architectures most arrays that are sized > > > using NR_CPUS lay in local memory on node 0. Not only will most > > > (99%?) of the systems not use all the slots in these arrays, > > > particularly when NR_CPUS is increased to accommodate future > > > very high cpu count systems, but a number of cache lines are > > > passed unnecessarily on the system bus when these arrays are > > > referenced by cpus on other nodes. > > > > Can we move cpuinfo_x86 also to per cpu area? Though critical run > > I worry how much impact that would be? boot_cpu_data is quite > widely used. > > > Wonder if this confusion is the reason for git commit f3fa8ebc > > What git commit (full id) ?
Looks like it's commit f3fa8ebc25129bb69929e20b0c84049c39029d8d Author: Rohit Seth <rohitseth@google.com> Date: Mon Jun 26 13:58:17 2006 +0200
[PATCH] x86_64: moving phys_proc_id and cpu_core_id to cpuinfo_x86
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