中断嵌套 要使用中断优先级，通常也要使能中断嵌套（Nested Interrupts）。...AXI Interrupt Controller的手册pg099中的描述如下： Nested Interrupts The core provides support for nested interrupts...It enables Microblaze interrupts after blocking further interrupts from the current interrupt number...On exit, it disables microblaze interrupts and restores ILR register default value(0xFFFFFFFF)back....It is recommended to increase STACK_SIZE in linker script for nested interrupts.
MPSoC的A53（PS）的中断细节，在Xilinx的UG1085的Table 13‐1: System Interrupts部分做了详细介绍。...PS-PL Interrupts The interrupts from the processing system I/O peripherals (IOP) are routed to the PL...检查Linux中断信息 Linux在/proc/interrupts文件里，提供了系统的中断信息。...读“/proc/interrupts”的内容时，会调用kernel\irq\Proc.c中的函数int show_interrupts(struct seq_file *p, void *v)。...interrupts IPI5: 0 0 0 0 IRQ work interrupts IPI6:
include #include #include #include #define TIME_BETWEEN_INTERRUPTS...define NUM_OF_GIVES 10 LOCAL SEM_ID semId; LOCAL WDOG_ID wdId; /* synchronizes with interrupts...**************************************************** * simulates a hardware device which generates interrupts...times ) { semGive(semId); times--; if(times > 0) wdStart(wdId, TIME_BETWEEN_INTERRUPTS...*/ wdStart(wdId, TIME_BETWEEN_INTERRUPTS,(FUNCPTR)syncISR, NUM_OF_GIVES); /* arbitrary delay
/proc/softirqs 提供了软中断的运行情况； /proc/interrupts 提供了硬中断的运行情况。 （4）硬中断：硬中断是由硬件产生的，比如，像磁盘，网卡，键盘，时钟等。...These interrupts are handled mostly as I/O interrupts; we discuss the peculiar characteristics of timer...interrupts in Chapter 6....Interprocessor interrupts A CPU issued an interrupt to another CPU of a multiprocessor system....We cover such interrupts in the later section "Interprocessor Interrupt Handling.”
[root@yejr.run]# watch -d cat /proc/interrupts ......LOC: 2468939840 2374791518 2373834803 2373613050 Local timer interrupts SPU: 0 0...0 0 Spurious interrupts PMI: 0 0 0 0 Performance monitoring...interrupts IWI: 50073298 45861632 45568755 45833911 IRQ work interrupts RTR: 0...CAL: 5131479 6539715 17285454 11211131 Function call interrupts TLB: 23094853 24045725
LOC: 2110890 1998553 Local timer interrupts SPU: 0 0 Spurious interrupts...PMI: 0 0 Performance monitoring interrupts IWI: 0 0 IRQ work...interrupts CAL: 1563802 1451446 Function call interrupts TLB: 1119 1363 TLB shootdowns...TRM: 0 0 Thermal event interrupts THR: 0 0 Threshold APIC interrupts...Hard interrupts are expensive because they cannot be interrupted.
static void watchdog_interrupt_count(void) { __this_cpu_inc(hrtimer_interrupts); } 这里我们就要回顾之前创建的那个kernel...线程了，多久调用一次就和hrtimer_interrupts的值密切相关。...static int watchdog_should_run(unsigned int cpu) { return __this_cpu_read(hrtimer_interrupts) !...); if (__this_cpu_read(hrtimer_interrupts_saved) == hrint) return 1; __this_cpu_write(hrtimer_interrupts_saved..., hrint); return 0; } 而这个函数主要就是查看hrtimer_interrupts变量在时钟中断处理函数里有没有被更新。
设备树里中断节点的语法 2.设备树里中断节点的示例 3.在代码中获得中断 参考： 内核Documentation\devicetree\bindings\interrupt-controller\interrupts.txt...= ; }; 如果中断控制器有级联关系，下级的中断控制器还需要表明它的“interrupt-parent”是谁，用了interrupt-parent”中的哪一个“interrupts...② interrupts 你要用哪一个中断？ Interrupts里要用几个cell，由interrupt-parent对应的中断控制器决定。...{ gpioext: gpio-adnp@41 { compatible = "ad,gpio-adnp"; interrupt-parent = ; interrupts...一个“interrupts-extended”属性就可以既指定“interrupt-parent”，也指定“interrupts”，比如： interrupts-extended = <&intc1
80040000 { compatible = "arm,pl310-cache"; reg = ; interrupts...compatible = "csdn,gitchat-tick"; reg = ; interrupts...compatible = "csdn,gitchat-gpio"; reg = ; interrupts...compatible = "csdn,gitchat-uart"; reg = ; interrupts...reg = ; interrupt-parent = ; interrupts
>; ranges; }; pmu@f8891000 { // Performance Monitor Unit compatible = "arm,cortex-a9-pmu"; interrupts...0x00000003 0x636c6b00 0x00000008>; clock-names = "can_clk", "pclk"; reg = ; interrupts...0x00000003 0x636c6b00 0x00000008>; clock-names = "can_clk", "pclk"; reg = ; interrupts...i2c-r1p10"; status = "disabled"; clocks = ; interrupt-parent = ; interrupts...i2c-r1p10"; status = "disabled"; clocks = ; interrupt-parent = ; interrupts
也可以查看/proc/interrupts，显示系统中各个CPU处理的中断数量。 Linux系统中的中断也很多，也可以采用如下脚本，设置所有中断的CPU亲和。.../bin/sh cat /proc/interrupts > interrupts_list_all.txt cat /proc/interrupts | grep -v "CPU" | grep...-v "IPI" | grep -v "Err" | awk '{print $1}' > interrupts_list.txt echo -e "\nRead interrupts list...file:" ; cat interrupts_list.txt | while read line do # remove colon : line_new=${line/:/}...interrupts IPI5: 0 0 0 0 IRQ work interrupts IPI6:
网卡中断 获取网卡设备所有中断 [root@PowerCycle_1_DL380G7 ~]# cat /proc/interrupts|grep -iw eth0 52: 12403...packets received, 0% packet loss round-trip min/avg/max = 0.1/0.1/0.4 ms [root@moon 44]# cat /proc/interrupts.../proc/interrupts 文件示例 [root@PowerCycle_1_DL380G7 ~]# cat /proc/interrupts CPU0 CPU1...44175771 40677695 7410066 5246562 6503443 4989630 6236192 3668821 Local timer interrupts...0 0 0 0 0 0 0 0 Spurious interrupts
Interrupt traffic Because ARM platforms deliver interrupts to CPU 0 only by default, we recommend the...In general, it's too hard to predict the state of the system for most common interrupts, but if you have...Drivers leaving preemption or IRQs disabled too long Disabling preemption or interrupts for too long...Keep in mind that running an interrupt handler prevents you from servicing other interrupts, which also...Many hardware interrupts are in the critical path of performance and must be run immediately.
(PPI), Shared Peripheral Interrupts (SPI), Software Generated Interrupts (SGI), and Locality-specific...Peripheral Interrupts (LPI)....The 1st cell is the interrupt type; 0 for SPI interrupts, 1 for PPI interrupts....SPI interrupts are in the range [0-987]. PPI interrupts are in the range [0-15]....用于描述一个中断源的详细信息，此值等于3代表interrupts中有三个字段 第一个字段代表中断类型（GIC_PPI, GIC_SPI） 第二个字段物理中断号，根据中断类型中断号的范围不同。
0x000003FF : 0; define symbol m_interrupts_start = 0x00000000; define symbol m_interrupts_end...define exported symbol __VECTOR_TABLE = m_interrupts_start; 具体详情可以参考.icf文件 系统启动首先执行boot.S文件，关中断，从中断向量表中获取其中第一项内容作为系统栈的首指针.../* Disable interrupts and clear pendingflags */ ldr r0, =NVIC_ICER0 ldr r1, =NVIC_ICPR0
/** Interrupt Number Definitions */ #define NUMBER_OF_INT_VECTORS 174 /**< Number of interrupts...Here the interrupts connected * to NVIC are the LEVEL1 interrupts, because they are routed to the core...* The interrupts connected to intmux are the LEVEL2 interrupts, they are routed * to NVIC first then...* * This function only enables the LEVEL1 interrupts....The number of LEVEL1 interrupts * is indicated by the feature macro FSL_FEATURE_NUMBER_OF_LEVEL1_INT_VECTORS
可以看到sysbench占用了很高的cpu使用率很高，但没有产生多少上下文切换 5.查看多线程，-t显示线程 pidstat -wt 3 可以看到线程占用的很多 6.查看中断信息 /proc/interrupts.../proc/interrupts 就是这种通信机制的一部分，用于内核空间与用户空间之间的通信，提供了一个只读的中断使用情况。 watch -d cat /proc/interrupts
CHECK_FOR_INTERRUPTS->ProcessInterrupts：InterruptPending在函数StatementCancelHandler中就置为了true，所以CHECK_FOR_INTERRUPTS...而PG关键流程中有很多地方都会调用CHECK_FOR_INTERRUPTS来检测中断的发生并处理。...一旦PG流程陷入某些底层函数出不来，导致statement_timeout超时，就会因为不能继续执行后续流程进入CHECK_FOR_INTERRUPTS做真正取消SQL的操作。
3、FreeRTOS 开关中断 FreeRTOS 开关中断函数为 portENABLE_INTERRUPTS ()和 portDISABLE_INTERRUPTS()，这两个函数其实是宏定义，在 portmacro.h...中有定义，如下： #define portDISABLE_INTERRUPTS() vPortRaiseBASEPRI() #define portENABLE_INTERRUPTS()...函数 vPortSetBASEPRI()是向寄存器 BASEPRI 写入一个值，此值作为参数 ulBASEPRI 传 递进来，portENABLE_INTERRUPTS()是开中断，它传递了个 0 给...\r\n"); portDISABLE_INTERRUPTS(); delay_xms(5000); printf("打开中断................中断关闭 5S 以后就会调用函数 portENABLE_INTERRUPTS()重新打开中断，重新打开中断以后 TIM5 恢复运行，蓝框所示部分。
Thread.currentThread(); Runnable task = w.firstTask; w.firstTask = null; w.unlock(); // allow interrupts...completedAbruptly); } } 代码中,我们可以看到lock()和unlokc()成对出现了.可是奇怪的是,在方法开始处还有一个unlock()调用. w.unlock(); // allow interrupts...在没有出现lock()的情况下,居然出现了unlock()调用.作者还注释了allow interrupts....Worker(Runnable firstTask) { setState(-1); // inhibit interrupts until runWorker this.firstTask
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