From 3c9e0969840d47a812f5e65fa43f694f2e7f3ff3 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Thu, 17 Jul 2025 17:44:05 -0400 Subject: kernel: sched: Add support for CPU pinning This commit introduces support for pinning processes to specific cores which can be useful for things like, keeping core-specific workthreads running on their respective processors as well as mitigating very specific cases of false-sharing and performance degradation caused by a thread jumping between cores which requires cache-line entries to be thrashed around between them. Threads pinned to a specific core will always see their cached data in the same L1, L2, etc. Signed-off-by: Ian Moffett --- sys/include/arch/amd64/cpu.h | 1 + 1 file changed, 1 insertion(+) (limited to 'sys/include/arch/amd64') diff --git a/sys/include/arch/amd64/cpu.h b/sys/include/arch/amd64/cpu.h index a047cef..046b621 100644 --- a/sys/include/arch/amd64/cpu.h +++ b/sys/include/arch/amd64/cpu.h @@ -46,6 +46,7 @@ struct cpu_info { uint32_t apicid; uint32_t feat; + uint8_t id; /* MI Logical ID */ uint8_t model : 4; /* CPU model number */ uint8_t family : 4; /* CPU family ID */ uint8_t has_x2apic : 1; -- cgit v1.2.3