webbench 网站压力测试
在一个网站上线之前,能承受多大访问量,在大访问量情况下性能怎么样。
压力测试
#include <string.h> const char * strrchr ( const char * str, int character ); char * strrchr ( char * str, int character ); returns a pointer to the last occurrence of character in string str. char* strstr(const char* haystack, const char* needle); This function returns a pointer to the first occurrence in haystack of any of the entire sequence of characters specified in needle, or a null pointer if the sequence is not present in haystack. char* index(const char* s, char c) index()用来找出参数s 字符串中第一个出现的参数c 地址,然后将该字符出现的地址返回。字符串结束字符(NULL)也视为字符串一部分 strcat strcpy strlen fdopen int sigaction(int signum, const struct sigaction *act, struct sigaction *oldact); examine and change a signal action, oldact is to save the old action of signal. signum specifies the signal and can be any valid signal except SIGKILL and SIGSTOP return 0 if success, return -1 if failed. #inlcude <unistd.h> unsigned in alarm(unsigned int seconds) alarm() arranges for a SIGALRM signal to be delivered to the calling process in seconds seconds. shutdown/close socket int shutdown(int s, int how) how = 0; 终止读取操作 how = 1; 终止写操作 how = 2; 终止读取及写操作 return 0 if success, return -1 if fail close 关闭本进程的socket id, 便链接还是开着的,用这个socket的其他进程还能用这个链接,能读或者写这个socket id shutdown 破坏了socket链接, goto in_addr_t inet_addr(const char* cp) The inet_addr() function converts the Internet host address cp from IPv4 numbers-and-dots notation into binary data in network byte order. If the input is invalid, INADDR_NONE (usually -1) is returned. Use of this function is problematic because -1 is a valid address (255.255.255.255). Avoid its use in favor of inet_aton(), inet_pton(3), or getaddrinfo(3) which provide a cleaner way to indicate error return. struct sockaddr_in { sa_family_t sin_family; /* address family: AF_INET */ in_port_t sin_port; /* port in network byte order */ struct in_addr sin_addr; /* internet address */ }; /* Internet address. */ struct in_addr { uint32_t s_addr; /* address in network byte order */ }; void *memcpy(void *dest, const void *src, size_t n); #include <netdb.h> struct hostent *gethostbyname(const char *name); struct hostent { char *h_name; /* official name of host */ char **h_aliases; /* alias list */ int h_addrtype; /* host address type */ int h_length; /* length of address */ char **h_addr_list; /* list of addresses */ } #define h_addr h_addr_list[0] /* for backward compatibility */ #include <arpa/inet.h> uint16_t htons(uint16_t hostshort); The htons() function converts the unsigned short integer hostshort from host byte order to network byte order. #include <sys/types.h> #include <sys/socket.h> int connect(int sockfd, const struct sockaddr* addr, socklen_t addrlen);