mirror of
https://review.haiku-os.org/haiku
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cf863a5040
Simple scheduler is used when we do not have to worry about cache affinity (i.e. single core with or without SMT, multicore with all cache levels shared). When we replace gSchedulerLock with more fine grained locking affine scheduler should also be chosen when logical CPU count is high (regardless of cache).
105 lines
2.2 KiB
C++
105 lines
2.2 KiB
C++
/*
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* Copyright 2002-2006, Haiku Inc. All rights reserved.
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* Distributed under the terms of the MIT License.
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*
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* Copyright 2002, Travis Geiselbrecht. All rights reserved.
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* Distributed under the terms of the NewOS License.
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*/
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#ifndef _KERNEL_CPU_H
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#define _KERNEL_CPU_H
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#include <setjmp.h>
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#include <smp.h>
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#include <timer.h>
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#include <arch/cpu.h>
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// define PAUSE, if not done in arch/cpu.h
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#ifndef PAUSE
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# define PAUSE()
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#endif
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struct kernel_args;
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namespace BKernel {
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struct Thread;
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}
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using BKernel::Thread;
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typedef enum cpu_topology_level {
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CPU_TOPOLOGY_SMT,
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CPU_TOPOLOGY_CORE,
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CPU_TOPOLOGY_PACKAGE,
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//
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CPU_TOPOLOGY_LEVELS
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} cpu_topology_level;
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/* CPU local data structure */
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typedef struct cpu_ent {
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int cpu_num;
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// thread.c: used to force a reschedule at quantum expiration time
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int preempted;
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timer quantum_timer;
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// keeping track of CPU activity
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bigtime_t active_time;
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bigtime_t last_kernel_time;
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bigtime_t last_user_time;
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// used in the kernel debugger
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addr_t fault_handler;
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addr_t fault_handler_stack_pointer;
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jmp_buf fault_jump_buffer;
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Thread* running_thread;
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Thread* previous_thread;
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bool invoke_scheduler;
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bool invoke_scheduler_if_idle;
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bool disabled;
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// CPU topology information
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int topology_id[CPU_TOPOLOGY_LEVELS];
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int cache_id[CPU_MAX_CACHE_LEVEL];
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// arch-specific stuff
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arch_cpu_info arch;
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} cpu_ent __attribute__((aligned(64)));
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//extern cpu_ent gCPU[MAX_BOOT_CPUS];
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extern cpu_ent gCPU[];
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extern uint32 gCPUCacheLevelCount;
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#ifdef __cplusplus
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extern "C" {
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#endif
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status_t cpu_preboot_init_percpu(struct kernel_args *args, int curr_cpu);
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status_t cpu_init(struct kernel_args *args);
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status_t cpu_init_percpu(struct kernel_args *ka, int curr_cpu);
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status_t cpu_init_post_vm(struct kernel_args *args);
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status_t cpu_init_post_modules(struct kernel_args *args);
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bigtime_t cpu_get_active_time(int32 cpu);
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cpu_ent *get_cpu_struct(void);
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extern inline cpu_ent *get_cpu_struct(void) { return &gCPU[smp_get_current_cpu()]; }
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void _user_clear_caches(void *address, size_t length, uint32 flags);
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bool _user_cpu_enabled(int32 cpu);
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status_t _user_set_cpu_enabled(int32 cpu, bool enabled);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _KERNEL_CPU_H */
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