Messages in this thread | | | From | Russ Anderson <> | Subject | Re: [PATCH v2:3/3]Export cpu topology by sysfs | Date | Mon, 9 Jan 2006 11:41:03 -0600 (CST) |
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Zhang, Yanmin wrote: > > >>In practice does the division of bits between core and thread in the > >>apic id differ between cpus in the same system? > > 2) On ia64, ia64 manual says that cpu physical id/core id/thread id are got by pal call. It doesn't mention how to divide apic id to get physical id/core id/thread id.
The socket_id, core_id, and thread_id are part of cpuinfo_ia64. They are set up in arch/ia64/kernel/smpboot.c: identify_siblings()
You cannot make assumptions about "the division of bits", but must rely on the values returned by pal.
-- Russ Anderson, OS RAS/Partitioning Project Lead SGI - Silicon Graphics Inc rja@sgi.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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