Messages in this thread | | | Date | Sat, 26 Oct 2002 02:43:20 +0200 | From | "J.A. Magallon" <> | Subject | Re: [PATCH] hyper-threading information in /proc/cpuinfo |
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On 2002.10.26 "Nakajima, Jun" wrote: >RedHat 8.0 is using > "Physical processor ID\t:" > "Number of siblings\t:" >This implies they need to change it anyway, because 2.4-ac is > "physical id\t:" > "siblings\t:" >
Summary: - we have processor packages - each package can handle several (someone said 128+ ;) ) processor cores. We really do not mind if they are really independent (power4) or not (xeon, ht) - each core is a logical unit for Linux - can we have two packages with different number of cores ?
Proposal for /proc/cpuinfo (sample box: an hypothetical TurboPower4 with 4 cores, 2 units on an SMP box):
processor : 0 processor : 2 processor : 4 processor : 6 package : 0 package : 0 package : 0 package : 0 core : 0 core : 1 core : 2 core : 3
processor : 1 processor : 3 processor : 5 processor : 7 package : 1 package : 1 package : 1 package : 1 core : 0 core : 1 core : 2 core : 3
So you can look for siblings based on package number, you can know if two precessors are in different packages (for sched...), etc.
NOTE: do not know if 'core' name can give problems, perhaps you could use 'unit' instead.
-- J.A. Magallon <jamagallon@able.es> \ Software is like sex: werewolf.able.es \ It's better when it's free Mandrake Linux release 9.1 (Cooker) for i586 Linux 2.4.20-pre11-jam2 (gcc 3.2 (Mandrake Linux 9.0 3.2-2mdk)) - 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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