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SubjectRe: how many cpus can linux support for SMP?
On 17 Jan 2002, Robert Love wrote:

| On Thu, 2002-01-17 at 01:59, Barry Wu wrote:
| > I am new to this mail list. I do not know how many CPUs linux can
| > support well using SMP. If some one knows, please give me
| > a reply. Thanks.
| 32.
| "well" though may mean many things and the answer depends on your
| workload.

On x86, using APICs, Pentium III maximum is 15 due to APIC addressing.
The IBM multiquad patch uses different APIC addressing (physical vs.
logical), so it goes beyond 15.
Pentium 4 APICs have addressing up to 255 IIRC, so they can do more
than P-III's 15.


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