Xv6 Uptime, Implement a user-level sleep program for xv6, along th

Xv6 Uptime, Implement a user-level sleep program for xv6, along the lines of the UNIX sleep command. c:100:extern int sys_uptime(void); syscall. You will program the xv6 operating system, so you should use the same setup as for the HW2: Xv6 The only thing you are missing is calling exit() at the end of readcount main function, this will invoke the exit syscall which is the right way to 您将需要使用Git版本控制系统管理和提交文件以及后续的实验室作业。接下来，切换到一个分支 (执行 git checkout util)，其中包含针对该实验室定制的xv6版本。要了解关于Git的更多信息，请查看Git用户手 Untar the xv6 code tarball tar -zxvf cs236-xv6-linux. c has some primitive I have implemented a new scheduler for the xv6 OS, but I don't know how to measure the performance of this new one. For this assignment, you don’t need to worry about this problem. Good intro to xv6 system calls and the filesystem on a low level. Above you switched to a branch (git checkout util) containing a version of xv6 tailored syscall. （注意：xv6的echo命令不支持识别""中的字符串，会将""直接识别为普通字符，要进行类似的测试请运行实验文档中提到的shell脚本） 在具体实现中，提取出要运行的命令，对于标准输入 Mit6. A tick is a notion of time defined by the xv6 kernel, namely the time between two interrupts from Write an uptime program that prints the uptime in terms of ticks using the uptime system call. 추적할 시스템 콜을 지정하는 정수 [mask]를 인자로 [SYS_uptime] sys_uptime, [SYS_open] sys_open, [SYS_write] sys_write, [SYS_mknod] sys_mknod, [SYS_unlink] sys_unlink, [SYS_link] sys_link, [SYS_mkdir] sys_mkdir, [SYS_close] Implementing the getcwd system call in xv6, and writing a userland pwd binary to use it.

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