Messages in this thread |  | | Subject | Re: [PATCH] proc-based cpu affinity user interface | From | Robert Love <> | Date | 26 Nov 2001 23:14:23 -0500 |
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On Mon, 2001-11-26 at 22:52, Davide Libenzi wrote: > As I said in reply to Ingo patch, it'd be better to expose "number" cpu > masks not "logical" ( like cpus_allowed ). > In this way the users can use 0..N-1 ( N == number of cpus phisically > available ) w/out having to know the internal mapping between logical and > number ids.
Do you mean you don't like using a bitmask ?
00000001 = first CPU, its not logical, its physical.
Plus, how do you intend to set multiple non-contiguous CPUs? A fraction of them? With only a 32-bit value?
Note also that my patch understands the underlying CPU nature, such that "echo 0000ffff > /proc/123/affinity" will only affine task 123 to your first 2 CPUs if you only have two. Thus, "cat /proc/123/affinity" will return "00000003".
Robert Love
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