c - CPU-Core thread classification Function -

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i'm going writing multi-threaded shared memory messaging system ultra high-volume message delivery between processes. messages originate worker threads of web-server. i'd exploit cpu cache locality cores on same cpu share. when wake worker thread on receiving end of ipc system, wake thread on same cpu.

i need linux (prefferably posix in genaral) , windows api calls , bitmasking need extract information let me classify executing thread-id -- context of said thread -- using following struct:

struct thread_core_id {     uint16_t cpu_id;     uint16_t core_id; };

functions both platforms appreciated. i'm hoping can done without system calls -- i.e., context-switches.

-- edit --

i'm focusing on x86 @ moment, other architectures useful well.

for linux should able required information out of /proc/cpuinfo , /sys/devices/system/cpu/cpu*/cache , use sched_{s|g}etaffinity() calls. take @ what every programmer should know memory, if haven't already, around section 5.3.


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