On Mon, 18 Nov 2002, William Lee Irwin III wrote:
> On 16x, 2.5.47 kernel compiles take about 26s when the machine is
> otherwise idle.
>
> On 32x, 2.5.47 kernel compiles take about 48s when the machine is
> otherwise idle.
one thing to note is that the kernel's compilation is not something that
parallelizes well to above 8 CPUs. Our make architecture creates many link
points which serialize 'threads of compilation'.
i'd try two things:
1) try Erich Focht's NUMA enhancements to the load balancer.
2) remove the -pipe flag from arch/i386/Makefile
the later thing will reduce the number of processes and makes compilation
more localized to a single CPU - which might (or might not) help NUMA
architectures.
Ingo
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This archive was generated by hypermail 2b29 : Sat Nov 23 2002 - 22:00:31 EST