内核在完成初始化后, 执行的第一个内核程序是init/main.c中定义的asmlinkage void __init start_kernel(void)启动内核;start_kernel()执行时, 又会调用arch/x86/kernel/traps.c中定义的void __init trap_init(void)初始化陷阱门及中断门;trap_init()通过执行set_syste
fork, vfork和clone的系统调用的入口地址分别是sys_fork, sys_vfork和sys_clone, 而他们的定义是依赖于体系结构的, 因为在用户空间和内核空间之间传递参数的方法因体系结构而异 系统调用的参数传递系统调用的实现与C库不同, 普通C函数通过将参数的值压入到进程的栈中进行参数的传递。由于系统调用是通过中断进程从...
首先进入_syscall0后,先执行:”0”(__NR_fork)是将fork在sys_call_table[]中对应的函数编号__NR_fork(也就是2)赋值给eax,(在sys_call_table[]中编号2即对应sys_fork函数)。然后执行int $0x80软中断,在set_system_gate(0x80,&system_call);(/linux/kernel/Sched.c中的sched_init函数里)中定义了中断0...
system_call 函数定义在kernel/system_call.s文件中 # kernel/system_call.s .globl system_call,sys_fork,timer_interrupt,sys_execve .globl hd_interrupt,floppy_interrupt,parallel_interrupt .globl device_not_available, coprocessor_error .align 2 bad_sys_call: movl $-1,%eax iret .align 2 reschedule:...
reschedule // 时间片用完则重新调度 cmpl $0,counter(%eax) # counter je reschedule ret_from_sys_call: movl _current,%eax # task[0] cannot have signals // 判断当前执行的进程是不是0号进程 cmpl _task,%eax // 是的话跳到标签3 je 3f cmpw $0x0f,CS(%esp) # was old code segment ...
1c). This suggested that totipotent-like cells in culture replicate DNA much more slowly than pluripotent stem cells. Importantly, the length of the S-phase did not change (see also below), suggesting that 2CLCs may use more origins than ESCs, to compensate for a slower fork progression. ...
* call to {@link #join} or related methods, or a call to {@link * #isDone} returning {@code true}. * * <p>This method may be invoked only from within {@code * ForkJoinPool} computations (as may be determined using method * {@link #inForkJoinPool}). Attempts to invoke in oth...
上述能对sharedctypes中的rawarray直接进行测试速度,然后作者直接否定了rawarray的速度,这确实没有直接array来得快,因为从表层来看,array能直接申请得到,而rawarray还需要经过一层周转,往深了讲,在stack上有个大佬也贴出了两者在C语言上的不同。 我大概翻译一下就是我们有C代码在热循环中Array_init调用Python代码(...
code_of_conduct.md Add Netlify deploy-status badge Nov 15, 2023 declarations.d.ts Add @heroicons to declarations Aug 1, 2023 middleware.ts fix: typo in languages/actionscript fixed in middlewaret.ts Dec 14, 2023 next.config.js Refactor all files in project to have 2 tabwidth Sep 29, 20...
call last): 6: from example_spider.rb:19:in `<main>' 5: from /home/victor/code/tanakai/lib/tanakai/base.rb:127:in `crawl!' 4: from /home/victor/code/tanakai/lib/tanakai/base.rb:127:in `each' 3: from /home/victor/code/tanakai/lib/tanakai/base.rb:128:in `block in crawl!