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How does thread distributed among CPU on T4-4

edited Jun 13, 2012 10:51PM in Oracle SuperCluster (MOSC) 1 commentAnswered
 Hi!  I am helping a customer and they have a question about how threads are handled on T4-4.
"We are wanting to create a processor set using 4 cores (32 threads) on a T4-4.  We want to make sure that all 32 threads are on the same CPU.  We are assuming that the first 64 threads according to psrinfo command are cpu0, the next are cpu1, etc. but we want to verify that.  I can't find any documentation that outlines what threads are with each cpu.".  I suggested to use "psrinfo -pv",  they asked " while that tells us what physical CPU a thread is on, we need to map it at the core level.  I see that CPU0 has thread 0-63 assigned to it.  Now I need to know what thread are assigned to CPU0/Core0, what threads are assigned to CPU0/Core1, what threads are assigned to CPU1/Core2 and what threads are assigned to CPU0/Core3, etc. .  I'm assuming that it is Core0=0-7, Core1=8-15, Core2=16-23, etc.  But we need verification of that.  We want to assign a processor set that is completely contained on a single CPU core, so that the memory, IO, etc. doesn't

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