对CPU mask 的访问通过函数set_cpu_xxxx()完成,其接收两个参数(cpuid ,true or false)。当第二个参数为 true 时,set_cpu的功能将被调用;当为 false 时, clear_cpu 的功能将被调用。例如,在系统初始化时,boot CPU 的API 接口调用如下代码所示: // in kernel/cpu.c void __init boot_cpu_init(void)...
struct cpumask __cpu_possible_mask在一个4core的SOC上面低4bit分别表示cpu0-cpu3,表示一个系统上配置了多少个cpu(core),不管它的状态是active还是inactive的,其它数量的cpu core类似 4.19/arch/arm64/kernel/smp.c void__init smp_init_cpus(void) {inti;if(acpi_disabled) of_parse_and_init_cpus();el...
cpumask_set_cpu(cpu,&__cpu_active_mask);elsecpumask_clear_cpu(cpu,&__cpu_active_mask); } 调用路径: cpuhp_hp_states[CPUHP_AP_ACTIVE].startup.single//kernel/cpu.c cpu hotplug回调resume_cpus(structcpumask *cpus)//kernel/cpu.c GPL导出的接口,目前只在core_ctl模块中使用sched_cpus_activat...
// file: include/linux/cpumask.h#define CPU_BITS_ALL \{ \[0 ... BITS_TO_LONGS(NR_CPUS)-2] = ~0UL, \[BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \} 由于在将比特位数量转成数组成员数量时,数组最后一个成员中可能会填充无效比特位,所以需要对其进行特殊处理。在CPU_BITS_ALL的实...
static inline void cpumask_clear_cpu(int cpu, struct cpumask *dstp) { clear_bit(cpumask_check(cpu), cpumask_bits(dstp)); } static inline void __cpumask_clear_cpu(int cpu, struct cpumask *dstp) { __clear_bit(cpumask_check(cpu), cpumask_bits(dstp)); } /** * cpu...
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aCPU内都设置一个中断触发器,还有在外部中断源的接口,一般设立中断屏蔽触发器共同决定一个中断程序是否被执行。 In CPU all establishes an interrupt flip-flop, but also has in exterior interrupt source connection, sets up the interrupt shield trigger to decide together generally whether an interrupt routin...
cpumask_rdtgrp_clear cpus_ctrl_write assign_irq_vector assign_irq_vector_any_locked assign_managed_vector activate_managed wq_calc_node_cpumask wq_calc_node_cpumask - calculate a wq_attrs' cpumask for the specified node*@attrs: the wq_attrs of the default pwq of the target work...
cpumask_clear_cpu(int cpu, volatile struct cpumask *dstp) { - clear_bit(cpu, dstp->bits); + clear_bit(cpu, cpumask_bits(dstp)); } /* No static inline type checking - see Subtlety (1) above. */ @@ -204,130 +204,142 @@ static inline void cpumask_clear_cpu(int static ...
Last Modify:2020-03-12 14:18:49Copyright©Brick 首页函数Tree 函数名称:设置CPU信息 返回类型:void 参数: 类型参数名称 unsigned intcpu struct cpumask *dstp 源代码转换工具 开放的插件接口X 支持:c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现:逻辑报告 ...