以 2020 南區初賽為例
~9:00 場佈(資料表,選手參賽證明) 設備檢查
9:30 ~ 10:00 開放高中選手簽到
9:30 ~ 10:00 開放高中選手測試 + 開場致詞
10:00 ~ 12:00 高中選手作答時間
12:00 ~ 12:30 印製獎狀 請選手休息並確定頒獎時間
12:30 ~ 13:00 大專組選手簽到+測試
13:00 ~ 16:00 大專組選手作答時間
16:00 ~ 17:00 印製獎狀 請選手休息並確定頒獎時間
(每一階段均需要拍照紀錄,另外在作答期間均須要對每組作答狀況進行拍照)
Debug always make developer sad, especially in a big system. How to debug in Linux Kernel? Tracing In early kernel patch, we have some tracing tools, e.g. strace, gdb. They are all based on the old tracing system call: ptrace. GDB gdb -q test.o strace
Jul 8, 2022refer: https://thenewstack.io/how-io_uring-and-ebpf-will-revolutionize-programming-in-linux/ io_uring Classic IO system call For UDP's receive system call, it can be divided into two stages, wait for data and copy data to user space. Kernel offered the following blocking system calls to deal with file descriptors, be they storage files or sockets: size_t read(int fd, void *buf, size_t count); size_t write(int fd, const void *buf, size_t count);
Jun 15, 20221. uclib vs glib uclib ->https://git.uclibc-ng.org/git/uclibc-ng.git uClibc-ng is a small C library for developing embedded Linux systems. It is much smaller than the GNU C Library, but nearly all applications supported by glibc also work perfectly with uClibc-ng. In strlen() function, the "finding zero in long size string" is different between glib and uclib. See Here //uclib
Jun 6, 2022We often use the strlen(str) function to get the length of the string. This is broad-use, and simply implemented. In C, we cannot consider a string as an object. We need to find the '\0'(NULL) character to determine the end of the string. C11 6.4.5 6. a byte or code of value zero is appended to each multibyte character sequence that results from a string literal or literals. C11 7.1.1 A string is a contiguous sequence of characters terminated by and including the first null character. The term multibyte string is sometimes used instead to emphasize special processing given to multibyte characters contained in the string or to avoid confusion with a wide string. A pointer to a string is a pointer to its initial (lowest addressed)
May 22, 2022or
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