[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-devel] [PATCH] Enlarge default NR_CPUS to 64 for x86_64
Yes, it is. We can push to 128 if there really are a lot of needs. The slightly side-effect is a little larger default memory footprint for hypervisor if not really need to support that much of pcpus. We can do it step by step. Jimmy Keir Fraser wrote: > Yes indeed. We could push to 128 no problem. I think Intel's only > concern is that 64 is as much as they test currently. > > -- Keir > > On 07/08/2009 11:02, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote: > >> I think there's little point in having both have the same limit. I'd >> rather question whether the limit shouldn't be pushed up higher for >> x86-64. >> >> Jan >> >>>>> Keir Fraser <keir.fraser@xxxxxxxxxxxxx> 07.08.09 11:52 >>> >> Shall we just bump it for i386 too? >> >> -- Keir >> >> On 07/08/2009 10:37, "Wei, Gang" <gang.wei@xxxxxxxxx> wrote: >> >>> By far a lot of systems are with more sockets (>=4), more cores >>> (>=8), meanwhile with HyperThread, so enlarge the default NR_CPUS >>> would easier the build for more threads systems. >>> >>> Jimmy >>> >>> ------------------------------------------------------------- >>> Enlarge default NR_CPUS to 64 for x86_64. >>> >>> Signed-off-by: Wei Gang <gang.wei@xxxxxxxxx> >>> >>> diff -r b9cdcf502aa3 xen/include/asm-x86/config.h >>> --- a/xen/include/asm-x86/config.h Thu Aug 06 11:14:48 2009 +0100 >>> +++ b/xen/include/asm-x86/config.h Fri Aug 07 14:54:06 2009 +0800 >>> @@ -49,7 +49,11 @@ #ifdef MAX_PHYS_CPUS >>> #define NR_CPUS MAX_PHYS_CPUS >>> #else >>> +#ifdef __i386__ >>> #define NR_CPUS 32 >>> +#else >>> +#define NR_CPUS 64 >>> +#endif >>> #endif >>> >>> #ifdef __i386__ >> >> >> >> _______________________________________________ >> Xen-devel mailing list >> Xen-devel@xxxxxxxxxxxxxxxxxxx >> http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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