![\"\"](\"https:\/\/www.oji-koji.com\/wp-content\/uploads\/2019\/06\/ulimitH.png\")
<\/a><\/a>\u305d\u308c\u3067\u306f\u3001\u5b9f\u969b\u306b\u30bd\u30b1\u30c3\u30c8\u304c\u3044\u304f\u3064\u4f5c\u308c\u308b\u304b\u8abf\u3079\u3066\u307f\u307e\u3057\u3087\u3046\u3002 \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210 \u3010makefile\u3011\nCC=g++ -g3 -O0\n#CC=g++\nPROGRAM=SockTest\nOBJS=SockTest.o stdThread.o\n\nSRCS=$(OBJS:%.o=%.cpp)\nINCLUDE=stdThread.h\nLFLAGS=-lpthread\n\n$(PROGRAM):$(OBJS) $(SRCS) $(INCLUDE)\n\t$(CC) -o $(PROGRAM) $(SRCS) $(LFLAGS)<\/p>\n\n\n\n SockTest.cpp\u3067\u3059\u3002 \u3010SockTest.cpp\u3011\n#include “stdThread.h”\n\n#ifdef _MSC_VER \/\/ Windows\u306e\u3068\u304d\n#define DISABLE_C4996 __pragma(warning(push)) __pragma(warning(disable:4996))\n#define ENABLE_C4996 __pragma(warning(pop))\n#else \/\/ Linux\u306e\u3068\u304d\n#define DISABLE_C4996\n#define ENABLE_C4996\n#endif\n\nBOOL DestroySocket(SOCKET &fd);\n\nint main(int argc, char *argv[])\n{\n int iRet = -1, iMaxSockNum, ii;\n SOCKET *pSockets = NULL, fdMax = 0;\n\/\/(1) fd_set rfds;\n\/\/(2) pollfd *fds = NULL;\n\n \/\/ \u8d77\u52d5\u30d1\u30e9\u30e1\u30fc\u30bf\u30c1\u30a7\u30c3\u30af\n if (argc != 2)\n {\n fprintf(stderr, “Usage: %s <SockeNum>\\n”, argv[0]);\n goto L_END;\n }\n\n if ((iMaxSockNum = atol(argv[1])) <= 0)\n {\n fprintf(stderr, “Usage: SockNum must be at least 1.\\n”);\n goto L_END;\n }\n \/\/ \u30bd\u30b1\u30c3\u30c8\u306e\u7834\u68c4\u306e\u305f\u3081\u306b\u30bd\u30b1\u30c3\u30c8\u3092\u8a18\u9332\u3057\u3066\u304a\u304f\u30a8\u30ea\u30a2\u306e\u78ba\u4fdd\u3068\u521d\u671f\u5316\n pSockets = (SOCKET *)calloc(iMaxSockNum, sizeof(SOCKET));\n memset(pSockets, (int)INVALID_SOCKET, iMaxSockNum * sizeof(SOCKET));\n\n\/\/(1) FD_ZERO(&rfds);\n\/\/(2) fds = (pollfd *)calloc(iMaxSockNum, sizeof(pollfd));\n\n for (ii = 0; ii < iMaxSockNum; ++ii)\n {\n\/\/ \u30bd\u30b1\u30c3\u30c8\u306e\u4f5c\u6210\n if ((pSockets[ii] = socket(AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)\n {\n DispErrorMsg(“Err:socket”);\n break;\n }\n fdMax = max(fdMax, pSockets[ii]); \/\/ \u4e00\u756a\u5927\u304d\u3044\u30bd\u30b1\u30c3\u30c8\u3092\u8abf\u3079\u308b\n \/\/ \u4f5c\u6210\u3067\u304d\u305f\u30bd\u30b1\u30c3\u30c8\u3092\u8868\u793a\n fprintf(stderr, “%4d %4d %4d\\n”, ii + 1, (int)pSockets[ii], (int)fdMax);\n\/\/(1) FD_SET(pSockets[ii], &rfds);\n\/\/(2) fds[ii].fd = pSockets[ii];\n }\n \/\/ \u30bd\u30b1\u30c3\u30c8\u306e\u7834\u68c4\n for (ii = 0; ii < iMaxSockNum; ++ii)\n {\n if (pSockets[ii] != INVALID_SOCKET)\n {\n DestroySocket(pSockets[ii]);\n }\n }\n\n iRet = 0;\n SAFE_FREE(pSockets)\n\/\/(2) SAFE_FREE(fds)\nL_END:\n return(iRet);\n}\n\n\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\n\/\/ function\n\/\/ TCP\u30bd\u30b1\u30c3\u30c8\u306e\u7834\u68c4\n\/\/ parameter\n\/\/ SOCKET &fd[in\/out]\u7834\u68c4\u3059\u308b\u30bd\u30b1\u30c3\u30c8\n\/\/ return\n\/\/ TRUE\/FALSE\n\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\nBOOL DestroySocket(SOCKET &fd)\n{\n\/\/ fprintf(stderr, “DestroySocket()\\n”);\n if (fd != INVALID_SOCKET)\n {\n shutdown(fd, SHUT_RDWR); \/\/ \u53d7\u4fe1\u3082\u9001\u4fe1\u3082\u505c\u6b62\n close(fd);\n fd = INVALID_SOCKET;\n }\n return(TRUE);\n}<\/p>\n\n\n\n .\/SockTest 1500 \u30aa\u30fc\u30d7\u30f3\u53ef\u80fd\u306a\u30d5\u30a1\u30a4\u30eb\u306e\u6570\u3092\u5897\u3084\u3059\u306b\u306f\u30013\u3064\u306e\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002 \u305d\u308c\u3067\u306f\u3001\u3053\u306e\u72b6\u614b\u3067SimpleServer\u304c\u305f\u304f\u3055\u3093\u306e\u63a5\u7d9a\u306b\u5bfe\u5fdc\u3057\u305f\u30b5\u30fc\u30d0\u3068\u3057\u3066\u52d5\u304f\u3053\u3068\u304c \u3053\u308c\u306ffd_set\u306e\u69cb\u9020\u306e\u554f\u984c\u3067\u3059<\/a>\u306e\u3067\u3001\u3053\u306e\u307e\u307e(select)\u3067\u306f\u3001\u6ca2\u5c71\u306e\u30bd\u30b1\u30c3\u30c8\u306b \/\/(1)\u306e\u30b3\u30e1\u30f3\u30c8\u3092\u5143(\u30b3\u30e1\u30f3\u30c8\u30a2\u30a6\u30c8)\u306b\u623b\u3057\u3066\u3001\/\/(2)\u306e\u30b3\u30e1\u30f3\u30c8\u30a2\u30a6\u30c8\u3092\u5916\u3057\u3066 Linux 2.1.23 \u4ee5\u964d\u3067\u306f\u3001Windows\u306efd_set\u306b\u4f3c\u305f\u3088\u3046\u306a\u69cb\u9020\u4f53pollfd<\/strong>\u3092\u4f7f\u3063\u3066 struct pollfd \n{\n int fd; \/* file descriptor *\/\n short events; \/* requested events *\/\n short revents; \/* returned events *\/\n};<\/p>\n\n\n\n \u76e3\u8996\u3057\u305f\u3044\u30bd\u30b1\u30c3\u30c8\u5206\u306epollfd\u914d\u5217\u3092\u4f5c\u308a\u307e\u3059\u3002 int poll(struct pollfd *fds, nfds_t nfds, int timeout);<\/strong> poll\u304b\u3089\u623b\u3063\u3066\u304d\u305f\u3089\u3001pollfd\u914d\u5217\u306e\u5404\u8981\u7d20\u306erevents\u3092\u8abf\u3079\u767a\u751f\u3057\u305f\u30a4\u30d9\u30f3\u30c8\u306b\u5fdc\u3058\u305f \u305d\u308c\u3067\u306f\u3001Linux\u7248SimpleServer\u3092\u5909\u66f4\u3057\u307e\u3059\u3002<\/strong> \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\n\/\/ function\n\/\/ \u63a5\u7d9a\u8981\u6c42\u306e\u53d7\u3051\u5165\u308c\n\/\/ parameter\n\/\/ \u306a\u3057\n\/\/ return\n\/\/ TRUE\/FALSE\n\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\nBOOL DoAccept()\n{\n BOOL fRet = FALSE;\n sockaddr_storage ClntAddr; \/\/ \u63a5\u7d9a\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u30a2\u30c9\u30ec\u30b9\u60c5\u5831\n char szHostAddr[NI_MAXHOST];\n socklen_t iClntLen; \/\/ \u63a5\u7d9a\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u30a2\u30c9\u30ec\u30b9\u60c5\u5831\u306e\u30b5\u30a4\u30ba\n int ii;\n pollfd fds[MAX_SOCKET_NUM] = {0}; \/\/\u2605\u5909\u66f4\u7b87\u6240\n\n fprintf(stderr, “DoAccept()\\n”);\n for (ii = 0; ii < m_iSockCount; ++ii) \/\/\u2605\u5909\u66f4\u7b87\u6240\n {\n fds[ii].fd = m_fdServer[ii];\n fds[ii].events = POLLIN; \/\/ \u53d7\u4fe1\u30a4\u30d9\u30f3\u30c8\u3092\u8a2d\u5b9a\n }\n\n while (1)\n {\n poll(fds, m_iSockCount, 10); \/\/\u2605\u5909\u66f4\u7b87\u6240\n \/\/ \u30ad\u30fc\u5165\u529b\u3067\u4e2d\u65ad\n if (CheckKey())\n {\n fprintf(stderr, ” OK:Abort by key\\n”);\n break;\n }\n for (ii = 0; ii < m_iSockCount; ++ii)\n {\n if (fds[ii].revents & POLLERR) \/\/\u2605\u5909\u66f4\u7b87\u6240 \u30a8\u30e9\u30fc\u767a\u751f\n DispErrorMsg(“Err:DoAccept”);\n else if(fds[ii].revents & POLLIN) \/\/\u2605\u5909\u66f4\u7b87\u6240 \u53d7\u4fe1\u30a4\u30d9\u30f3\u30c8\u767a\u751f\n {\n iClntLen = sizeof(ClntAddr); \/\/ \u63a5\u7d9a\u5148\u30a2\u30c9\u30ec\u30b9\u60c5\u5831\u3092\u683c\u7d0d\u3059\u308b\u69cb\u9020\u4f53\u306e\u30b5\u30a4\u30ba\n if ((m_fdClient = accept(m_fdServer[ii], (sockaddr *)&ClntAddr, &iClntLen)) == INVALID_SOCKET)\n DispErrorMsg(“Err:accept”);\n else\n {\n if (getnameinfo((struct sockaddr *) &ClntAddr, (socklen_t)iClntLen,\n szHostAddr, sizeof(szHostAddr), NULL, 0, NI_NUMERICHOST) == 0)\n {\n fprintf(stderr, “%s\\n”, szHostAddr);\n }\n fRet = TRUE;\n goto L_END;\n }\n }\n }\n }\nL_END:\n return(fRet);\n}<\/p>\n\n\n\n <\/p>\n\n\n\n \u3010SimpleServer.cpp\u3011\n\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\n\/\/ function\n\/\/ \u53d7\u4fe1\u51e6\u7406\n\/\/ parameter\n\/\/ \u306a\u3057\n\/\/ return\n\/\/ TRUE\/FALSE\n\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\nBOOL DoRecv()\n{\n BOOL fRet = TRUE;\n char szRecvBuffer[RCVBUFSIZE + 1]; \/\/ \u53d7\u4fe1\u30d0\u30c3\u30d5\u30a1\n int iSize;\n pollfd fds[1] = {0}; \/\/\u2605\u5909\u66f4\u7b87\u6240\n \n fprintf(stderr, “DoRecv()\\n”);\n fds[0].fd = m_fdClient;\n fds[0].events = POLLIN | POLLRDHUP; \/\/\u2605\u5909\u66f4\u7b87\u6240 \u53d7\u4fe1\u3068\u76f8\u624b\u5074\u304b\u3089\u306e\u5207\u65ad\u30a4\u30d9\u30f3\u30c8\u3092\u8a2d\u5b9a\n\n while (1)\n {\n poll(fds, 1, 10); \/\/\u2605\u5909\u66f4\u7b87\u6240\n if (CheckKey())\n {\n fprintf(stderr, ” OK:Abort by key\\n”);\n break;\n }\n if (fds[0].revents & POLLRDHUP) \/\/\u2605\u5909\u66f4\u7b87\u6240 \u76f8\u624b\u5074\u304b\u3089\u306e\u5207\u65ad\n {\n fprintf(stderr, “Disconnected pollrdhup\\n”);\n fRet = FALSE;\n break;\n }\n else if (fds[0].revents & POLLERR) \/\/\u2605\u5909\u66f4\u7b87\u6240 \u30a8\u30e9\u30fc\u767a\u751f\n {\n DispErrorMsg(“Err:DoRecv”);\n fRet = FALSE;\n break;\n }\n else if (fds[0].revents & POLLIN) \/\/\u2605\u5909\u66f4\u7b87\u6240 \u53d7\u4fe1\u30c7\u30fc\u30bf\u30a4\u30d9\u30f3\u30c8\n {\n memset(szRecvBuffer, 0, sizeof(szRecvBuffer));\n if ((iSize = recv(m_fdClient, szRecvBuffer, RCVBUFSIZE, 0)) <= 0)\n {\n if (iSize == 0)\n fprintf(stderr, “Disconnected recv\\n”);\n else\n DispErrorMsg(“Err:recv”);\n fRet = FALSE;\n break;\n }\n else\n {\n fprintf(stderr, “%s\\n”, szRecvBuffer);\n }\n }\n }\n return(fRet);\n}<\/p>\n\n\n\n \u6b21\u306bLinux\u7248SimpleClient<\/strong>\u306e\u5909\u66f4\u3092\u5909\u66f4\u3057\u307e\u3059\u3002 \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\n\/\/ function\n\/\/ send\u306e\u5b9f\u884c\n\/\/ parameter\n\/\/ char *pcData [in]\u9001\u4fe1\u30c7\u30fc\u30bf\n\/\/ int iSize [in]\u30c7\u30fc\u30bf\u6570\n\/\/ return\n\/\/ TRUE\/FALSE\n\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\nBOOL DoSend(char *pcData, int iSize)\n{\n BOOL fRet = TRUE;\n pollfd fds[1] = {0}; \/\/\u2605\u5909\u66f4\u7b87\u6240\n\n fds[0].fd = m_fdClient; \/\/\u2605\u5909\u66f4\u7b87\u6240\n fds[0].events = POLLOUT; \/\/ \u66f8\u304d\u8fbc\u307f\u53ef\u80fd\u30a4\u30d9\u30f3\u30c8\u3092\u8a2d\u5b9a\n\n while (1)\n {\n poll(fds, 1, 10);\n if (fds[0].revents & POLLERR) \/\/\u2605\u5909\u66f4\u7b87\u6240 \u30a8\u30e9\u30fc\u767a\u751f\n {\n DispErrorMsg(“Err DoSend”);\n fRet = FALSE;\n break;\n }\n else if (fds[0].revents & POLLOUT) \/\/\u2605\u5909\u66f4\u7b87\u6240 \u9001\u4fe1\u53ef\u80fd\u306a\u3089send\u5b9f\u65bd\n {\n if (send(m_fdClient, pcData, iSize, 0) != iSize)\n {\n DispErrorMsg(“Err:send”);\n fRet = FALSE;\n }\n break;\n }\n }\n return(fRet);\n}<\/p>\n\n\n\n \u3010\u53c2\u80031\u3011 \u3010\u53c2\u80032\u3011 \u30d7\u30ed\u30b8\u30a7\u30af\u30c8SimpleServer for Linux poll\u5bfe\u5fdc<\/a><\/p>\n\n\n\n
SockTest\u3068\u3044\u3046\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f5c\u6210\u3057\u307e\u3059<\/strong>\u3002
\u8d77\u52d5\u5f15\u6570\u3067\u6307\u5b9a\u3055\u308c\u305f\u6570\u3060\u3051\u3001socket\u95a2\u6570\u304c\u6210\u529f\u3059\u308b\u9650\u308a\u30bd\u30b1\u30c3\u30c8\u3092\u4f5c\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\u30d5\u30a1\u30a4\u30eb\u2192\u65b0\u898f\u4f5c\u6210\u2192\u30af\u30ed\u30b9\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u2192\u30e1\u30a4\u30af\u30d5\u30a1\u30a4\u30eb\u30d7\u30ed\u30b8\u30a7\u30af\u30c8
\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u540d\uff1aSockTest
\u300c\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u306e\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u4f5c\u6210\u3059\u308b\u300d\u306e\u30c1\u30a7\u30c3\u30af\u3092\u5916\u3057\u307e\u3059\u3002
stdThread.cpp, stdThread.h\u3092\u30ea\u30f3\u30af<\/a>\u304b\u3089\u53d6\u5f97\u3057\u3001\u65e2\u5b58\u306e\u9805\u76ee\u3068\u3057\u3066\u8ffd\u52a0\u3057\u307e\u3059\u3002
makefile\u3092SimpleClient\u306a\u3069\u304b\u3089\u30b3\u30d4\u30fc\u3057\u3001\u65e2\u5b58\u306e\u9805\u76ee\u3068\u3057\u3066\u8ffd\u52a0\u3057\u307e\u3059\u3002
makefile\u3092\u5909\u66f4\u3057\u307e\u3059\u3002
SockTest.cpp\u3092\u65b0\u898f\u306b\u4f5c\u6210\u3057\u307e\u3059\u3002
\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u8a2d\u5b9a\u306f\u3001\u3053\u3053<\/a>\u3092\u53c2\u8003\u306b\u884c\u3063\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n
\/\/(1), \/\/(2)\u3067\u30b3\u30e1\u30f3\u30c8\u3057\u3066\u3042\u308b\u7b87\u6240\u306f\u5f8c\u7a0b\u3001\u89e3\u8aac\u3057\u307e\u3059\u3002
\u3053\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u3001\u5358\u306b\u5f15\u6570\u3067\u6307\u5b9a\u3055\u308c\u305f\u6570\u5206\u3001\u30bd\u30b1\u30c3\u30c8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002
\u4f5c\u6210\u306b\u5931\u6557\u3057\u305f\u3089\u30a8\u30e9\u30fc\u3092\u8868\u793a\u3057\u307e\u3059\u3002\u30a8\u30e9\u30fc\u8868\u793a\u95a2\u6570\u306f\u3001stdThread.cpp\u306b\u3042\u308a\u307e\u3059\u3002
\u4f5c\u6210\u306b\u6210\u529f\u3057\u305f\u3089\u3001\u4f55\u756a\u76ee\u3001\u30bd\u30b1\u30c3\u30c8\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u3001\u30bd\u30b1\u30c3\u30c8\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u306e\u6700\u5927\u5024\u3092
\u8868\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u3067\u52d5\u304b\u3057\u3066\u307f\u308b\u30681021\u500b\u30bd\u30b1\u30c3\u30c8\u3092\u4f5c\u6210\u5f8c\u3001\u30a8\u30e9\u30fc\u304c\u3067\u307e\u3059\u3002
Err:socket 24 Too many open files
\u6a19\u6e96\u5165\u529b0\u3001\u6a19\u6e96\u51fa\u529b1\u3001\u6a19\u6e96\u30a8\u30e9\u30fc2\u306e3\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u3092\u52a0\u3048\u3066
1024\u500b\u306e\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u3092\u30aa\u30fc\u30d7\u30f3\u5f8c\u3001\u30a8\u30e9\u30fc\u3068\u3044\u3046\u3053\u3068\u3067
ulimit -S -a\u3067\u5206\u304b\u3063\u305f\u3001\u30bd\u30d5\u30c8\u30ea\u30df\u30c3\u30c8\u307e\u3067\u3057\u304b\u30aa\u30fc\u30d7\u30f3\u3067\u304d\u306a\u3044<\/strong>\u3053\u3068\u304c
\u308f\u304b\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<\/a><\/figure>\n\n\n\n
1.\u30ab\u30fc\u30cd\u30eb\u30d8\u30c3\u30c0\u30d5\u30a1\u30a4\u30eb\u4e2d\u306e INR_OPEN \u306e\u5024\u3092\u66f8\u304d\u5909\u3048\u3066 rebuild \u3059\u308b\u3002
\u3053\u308c\u306f\u3001\u8003\u3048\u305f\u3060\u3051\u3067\u3082\u5927\u5909\u305d\u3046\u3067\u3059\u306d\u3002
2.ulimit -n \u3092\u4f7f\u3063\u3066\u3001\u4e00\u6642\u7684\u306b\u5236\u9650\u3092\u5909\u66f4\u3059\u308b\u3002
\u3053\u3053\u3067\u306f\u3001\u3053\u308c\u3092\u3084\u3063\u3066\u307f\u307e\u3059\u3002
3.\/etc\/security\/limits.conf \u306e\u8a2d\u5b9a\u3092\u66f8\u304d\u5909\u3048\u3001\u5236\u9650\u3092\u5909\u66f4\u3059\u308b\u3002
\u3053\u308c\u3082\u3067\u304d\u307e\u3059\u306d\u3002
ulimit -S -n 2000
\u3067\u30bd\u30d5\u30c8\u30ea\u30df\u30c3\u30c8\u30922000\u306b\u3057\u3066
.\/SockTest 1500
\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002
\u3046\u307e\u304f1500\u500b\u306e\u30bd\u30b1\u30c3\u30c8\u304c\u4f5c\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<\/a><\/figure>\n\n\n\n
\u3067\u304d\u308b\u304b\u8abf\u3079\u3066\u307f\u307e\u3057\u3087\u3046\u3002
\/\/(1)\u306e\u30b3\u30e1\u30f3\u30c8\u30a2\u30a6\u30c8\u3092\u5916\u3057\u3066\u304f\u3060\u3055\u3044\u3002
\u3053\u308c\u3089\u306fselect\u3092\u4f7f\u3063\u3066\u53d7\u4fe1\u30c7\u30fc\u30bf\u3084\u9001\u4fe1\u53ef\u80fd\u306e\u76e3\u8996\u3092\u884c\u3046\u305f\u3081\u306b\u5fc5\u8981\u306a\u30b3\u30fc\u30c9\u3067\u3059\u3002
\u30d3\u30eb\u30c9\u3057\u3066
.\/SockTest 1500
\u3092\u5b9f\u884c\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002
\u5909\u306a\u6319\u52d5\u3092\u3057\u3066\u3001\u7570\u5e38\u7d42\u4e86\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<\/figure>\n\n\n\n
\u5bfe\u5fdc\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n\n\n\n
\u30d3\u30eb\u30c9\u3057\u3066\u3001\u5b9f\u884c\u3059\u308b\u3068\u554f\u984c\u306a\u304f\u52d5\u4f5c\u3057\u307e\u3059\u3002
\u3053\u306e\/\/(2)\u306e\u90e8\u5206\u304cpoll\u3092\u4f7f\u7528\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u306a\u30b3\u30fc\u30c9\u3067\u3059\u3002<\/p>\n\n\n\n
select\u306e\u4ee3\u308f\u308a\u306bpoll\u3092\u3064\u304b\u3063\u3066\u3001\u5927\u304d\u306a\u5024\u306e\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf(\u30bd\u30b1\u30c3\u30c8)\u3092
\u6271\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u305d\u308c\u305e\u308c\u306e\u8981\u7d20\u306efd\u306b\u30bd\u30b1\u30c3\u30c8<\/strong>\u3092events\u306b\u76e3\u8996\u30a4\u30d9\u30f3\u30c8<\/strong>\u3092\u30bb\u30c3\u30c8\u3057\u307e\u3059\u3002
POLLIN\u3000\u3000\u3000\u8aad\u307f\u51fa\u3057\u53ef\u80fd\u306a\u30c7\u30fc\u30bf\u304c\u3042\u308b\u3002
POLLPRI \u3000\u3000\u8aad\u307f\u51fa\u3057\u53ef\u80fd\u306a\u7dca\u6025\u30c7\u30fc\u30bf (urgent data) \u304c\u3042\u308b
POLLOUT\u3000\u3000\u66f8\u304d\u8fbc\u307f\u304c\u53ef\u80fd\u306b\u306a\u3063\u305f\u3002
POLLRDHUP\u3000\u30b9\u30c8\u30ea\u30fc\u30e0\u30bd\u30b1\u30c3\u30c8\u306e\u4ed6\u7aef\u304c\u3001\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u3092 close \u3057\u305f\u304b\u3001
\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u306e\u66f8\u304d\u8fbc\u307f\u5074\u3092 shutdown \u3057\u305f\u3002<\/p>\n\n\n\n
\u3092\u547c\u3073\u51fa\u3057\u3001\u76e3\u8996\u3092\u884c\u3046\u3002
fds pollfd\u914d\u5217\u306e\u30dd\u30a4\u30f3\u30bf
nfds \u914d\u5217\u306e\u6570
timeout \u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u6642\u9593(\u30df\u30ea\u79d2)<\/p>\n\n\n\n
\u51e6\u7406\u3092\u884c\u3046\u3002
POLLIN \u8aad\u307f\u51fa\u3057\u53ef\u80fd\u306a\u30c7\u30fc\u30bf\u304c\u3042\u308b\u3002
POLLPRI \u8aad\u307f\u51fa\u3057\u53ef\u80fd\u306a\u7dca\u6025\u30c7\u30fc\u30bf (urgent data) \u304c\u3042\u308b
POLLOUT \u66f8\u304d\u8fbc\u307f\u304c\u53ef\u80fd\u306b\u306a\u3063\u305f\u3002
POLLRDHUP \u30b9\u30c8\u30ea\u30fc\u30e0\u30bd\u30b1\u30c3\u30c8\u306e\u4ed6\u7aef\u304c\u3001\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u3092 close \u3057\u305f\u304b\u3001
\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u306e\u66f8\u304d\u8fbc\u307f\u5074\u3092 shutdown \u3057\u305f\u3002
POLLERR \u30a8\u30e9\u30fc\u72b6\u614b
POLLHUP \u30cf\u30f3\u30b0\u30a2\u30c3\u30d7\u3057\u305f
POLLNVAL \u4e0d\u6b63\u306a\u8981\u6c42: fd \u304c\u30aa\u30fc\u30d7\u30f3\u3055\u308c\u3066\u3044\u306a\u3044<\/p>\n\n\n\n
\u66f4\u65b0\u6e08\u307fstdThread.cpp, stdThead.h<\/a>\u306b\u7f6e\u304d\u63db\u3048\u3066\u304f\u3060\u3055\u3044\u3002
poll.h, DispErrorMsg\u304c\u8ffd\u52a0\u3055\u308c\u3066\u3044\u307e\u3059\u3002
\u4ee5\u4e0b\u306b\u5909\u66f4\u3059\u308b\u95a2\u6570\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002(select\u306b\u95a2\u4fc2\u3057\u3066\u3044\u308b\u95a2\u6570)<\/p>\n\n\n\n
SimpleServer\u3068\u540c\u69d8\u3001\u66f4\u65b0\u6e08\u307fstdThread.cpp, stdThead.h<\/a>\u306b\u7f6e\u304d\u63db\u3048\u3066\u304f\u3060\u3055\u3044\u3002
\u4ee5\u4e0b\u306b\u5909\u66f4\u3059\u308b\u95a2\u6570\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002(select\u306b\u95a2\u4fc2\u3057\u3066\u3044\u308b\u95a2\u6570)<\/p>\n\n\n\n
VisualStudio\u3092\u4f7f\u3063\u3066\u30c7\u30d0\u30c3\u30b0\u3092\u3059\u308b\u969b\u306eulimit\u306e\u6307\u5b9a\u306e\u4ed5\u65b9<\/p>\n\n\n\n<\/a><\/figure>\n\n\n\n
ulimit \u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3059\u308b\u5834\u5408\u3001\u30cf\u30fc\u30c9\u30ea\u30df\u30c3\u30c8\u3092\u8a2d\u5b9a\u3057\u305f\u3044\u5834\u5408\u306f -H \u3001
\u30bd\u30d5\u30c8\u30ea\u30df\u30c3\u30c8\u3092\u8a2d\u5b9a\u3057\u305f\u3044\u5834\u5408\u306f-S \u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u6307\u5b9a\u3057\u307e\u3059\u304c\u3001
\u3069\u3061\u3089\u3082\u6307\u5b9a\u3057\u306a\u3044\u3068\u4e21\u65b9\u306b\u5236\u9650\u304c\u304b\u3051\u3089\u308c\u307e\u3059\u3002
\u30bd\u30d5\u30c8\u30ea\u30df\u30c3\u30c8\u3092\u8a2d\u5b9a\u3059\u308b\u5834\u5408\u306f\u3001\u30cf\u30fc\u30c9\u30ea\u30df\u30c3\u30c8\u306e\u7bc4\u56f2\u5185\u3067\u8a2d\u5b9a\u3057\u307e\u3059\u3002
\u30cf\u30fc\u30c9\u30ea\u30df\u30c3\u30c8\u3092\u8a2d\u5b9a\u3059\u308b\u3068\u3001\u4e00\u822c\u30e6\u30fc\u30b6\u306f\u30cf\u30fc\u30c9\u30ea\u30df\u30c3\u30c8\u306e\u7bc4\u56f2\u5185\u3067\u3057\u304b\u5024\u3092
\u5909\u66f4\u3059\u308b\u4e8b\u304c\u3067\u304d\u307e\u305b\u3093\u3002
\u4e00\u822c\u30e6\u30fc\u30b6\u304c\u8a2d\u5b9a\u3055\u308c\u305f\u5024\u3088\u308a\u5927\u304d\u306a\u5024\u306b\u30b7\u30b9\u30c6\u30e0\u30ea\u30bd\u30fc\u30b9\u306e\u5024\u3092\u5909\u66f4\u3057\u3088\u3046\u3068
\u3057\u305f\u5834\u5408\u306b\u306f\u3001\u30a8\u30e9\u30fc\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002
\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u30cf\u30fc\u30c9\u30ea\u30df\u30c3\u30c8\u3088\u308a\u5927\u304d\u306a\u5024\u306b\u5909\u66f4\u3059\u308b\u305f\u3081\u306b\u306f root \u6a29\u9650\u304c\u5fc5\u8981\u3067\u3059\u3002
\u518d\u8d77\u52d5\u5f8c\u8a2d\u5b9a\u5024\u306f\u3001\u521d\u671f\u306b\u623b\u308b\u306e\u3067\u518d\u8a2d\u5b9a\u3092\u3059\u308b\u304b
\/etc\/security\/limits.conf \u306e\u8a2d\u5b9a\u3092\u66f8\u304d\u5909\u3048\u307e\u3059\u3002<\/p>\n\n\n\n