* an IRQ may be received by. */#include<stdlib.h>#include"tst_test.h"#include"tst_safe_stdio.h"#include"tst_safe_file_at.h"enumaffinity{ALLOW='+',DENY='-',};staticunsignedint*irq_stats;staticenumaffinity*irq_affinity;staticunsignedintnr_cpus;staticunsignedintnr_irqs;staticunsignedint*ir...
16 /** 17 * struct irq_desc - interrupt descriptor 18 * @irq_data: per irq and chip data passed down to chip functions 19 * @kstat_irqs: irq stats per cpu 20 * @handle_irq: highlevel irq-events handler 21 * @preflow_handler: handler called before the flow handler (currently used...
void(*get_strings)(struct phy_device *dev, u8 *data); void(*get_stats)(struct phy_device *dev, struct ethtool_stats *stats, u64 *data); int(*get_tunable)(struct phy_device *dev, struct ethtool_tunable *tuna,void*data); int(*set_tunable)(struct phy_device *dev, struct ethtool_...
for multiple irq_set_irq_wake() callers27 * @irq_count: stats field to detect stalled ir...
void(*get_stats)(struct phy_device *dev, struct ethtool_stats *stats, u64 *data); int(*get_tunable)(struct phy_device *dev, struct ethtool_tunable *tuna,void*data); int(*set_tunable)(struct phy_device *dev, struct ethtool_tunable *tuna, ...
最后去check linux kernal代码中关于cs ,%soft和%irq的统计逻辑,发现中断统计的实现是靠Read stats from /proc/interrupts or /proc/softirqs。更详细的实现请参看here。而进程的上下文切换是通过watch /proc/${process_id}/status来实现的。至于两者的数理关系,至少依靠现在的知识体系还无法拿到,欢迎不吝赐教。
3.2 clear_work_stats 清除各个对象节点上分配中的负载值,以便重新赋值。 3.3 parse_proc_interrupts 通过分析/proc/interrupts文件,更新各个irq在所有cpu上中断次数的累加和。 3.4 parse_proc_stats (1) 计算各个对象节点的load,并更新到topo_obj.load。
pm_stats_update(z_cpus_pm_state[id].state); pm_system_resume(); // <--- Point of interest discussed below k_sched_unlock(); // <--- Scheduler is unlocked and the idle thread becomes preemptable once again pm_system_resumecallspm_state_exit_post_opswhich is where interrupts are reen...
#ifdef CONFIG_TIMER_STATS timer->start_site = NULL; timer->start_pid = -1; memset(timer->start_comm, 0, TASK_COMM_LEN); #endif } init_timer()函数被定义在kernel/timer.c中,实际上是将timer的entry的next指针置为NULL,为base字段赋值。
clear_work_stats(); parse_proc_interrupts(); parse_proc_stat(); // ... // ... calculate_placement(); activate_mappings(); // ... } // ... } 中断最终是运行在某一个cpu上的,所以有的中断虽然分配在cache、package层次上,但是最终还是在cpu上运行,所有每个cpu执行中断数大概等于所有父节点的...