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<h1 class="article_title">TCP浼犺緭灝忔暟鎹寘鏁堢巼闂</h1>
<div class="article_author">娣誨姞鏃墮棿錛?016-11-8 15:38:29 鏂囩珷浣滆�咃細<a href="/">嫻庡崡杞歡寮�鍙?/a> 嫻忚嬈℃暟錛?Script Language="Javascript" Src="/item/GetHits.asp?Action=Count&GetFlag=0&m=1&ID=2937"></Script></div>
<div class="article_main"><div id="MyContent"><p><span style="font-size: 14px;">銆�銆�鎽樿錛氬綋浣跨敤TCP浼犺緭灝忓瀷鏁版嵁鍖呮椂錛岀▼搴忕殑璁捐鏄浉褰撻噸瑕佺殑銆傚鏋滃湪璁捐鏂規涓笉瀵筎CP鏁版嵁鍖呯殑寤惰繜搴旂瓟錛孨agle綆楁硶錛學insock緙撳啿浣滅敤寮曡搗閲嶈錛屽皢浼氫弗閲嶅獎鍝嶇▼搴忕殑鎬ц兘銆傝繖綃囨枃绔犺璁轟簡榪欎簺闂錛屽垪涓句簡涓や釜妗堜緥錛岀粰鍑轟簡涓�浜涗紶杈撳皬鏁版嵁鍖呯殑浼樺寲璁捐鏂規銆?/span></p><p><span style="font-size: 14px;">銆�銆�鑳屾櫙錛氬綋Microsoft TCP鏍堟帴鏀跺埌涓�涓暟鎹寘鏃訛紝浼氬惎鍔ㄤ竴涓?00姣鐨勮鏃跺櫒銆傚綋ACK紜鏁版嵁鍖呭彂鍑轟箣鍚庯紝璁℃椂鍣ㄤ細澶嶄綅錛屾帴鏀跺埌涓嬩竴涓暟鎹寘鏃訛紝浼氬啀嬈″惎鍔?00姣鐨勮鏃跺櫒銆備負浜嗘彁鍗囧簲鐢ㄧ▼搴忓湪鍐呴儴緗戝拰Internet涓婄殑浼犺緭鎬ц兘錛孧icrosoft TCP鏍堜嬌鐢ㄤ簡涓嬮潰鐨勭瓥鐣ユ潵鍐沖畾鍦ㄦ帴鏀跺埌鏁版嵁鍖呭悗浠�涔堟椂鍊欏彂閫丄CK紜鏁版嵁鍖咃細</span></p><p><span style="font-size: 14px;">銆�銆�1銆佸鏋滃湪200姣鐨勮鏃跺櫒瓚呮椂涔嬪墠錛屾帴鏀跺埌涓嬩竴涓暟鎹寘錛屽垯绔嬪嵆鍙戦�丄CK紜鏁版嵁鍖呫�?/span></p><p><span style="font-size: 14px;">銆�銆�2銆佸鏋滃綋鍓嶆伆濂芥湁鏁版嵁鍖呴渶瑕佸彂緇橝CK紜淇℃伅鐨勬帴鏀剁錛屽垯鎶夾CK紜淇℃伅闄勫甫鍦ㄦ暟鎹寘涓婄珛鍗沖彂閫併�?/span></p><p><span style="font-size: 14px;">銆�銆�3銆佸綋璁℃椂鍣ㄨ秴鏃訛紝ACK紜淇℃伅绔嬪嵆鍙戦�併�?/span></p><p><span style="font-size: 14px;">銆�銆�涓轟簡閬垮厤灝忔暟鎹寘鎷ュ緗戠粶錛孧icrosoft TCP鏍堥粯璁ゅ惎鐢ㄤ簡Nagle綆楁硶錛岃繖涓畻娉曡兘澶熷皢搴旂敤紼嬪簭澶氭璋冪敤Send鍙戦�佺殑鏁版嵁鎷兼帴璧鋒潵錛屽綋鏀跺埌鍓嶄竴涓暟鎹寘鐨凙CK紜淇℃伅鏃訛紝涓�璧峰彂閫佸嚭鍘匯�備笅闈㈡槸Nagle綆楁硶鐨勪緥澶栨儏鍐碉細</span></p><p><span style="font-size: 14px;">銆�銆�1銆佸鏋淢icrosoft TCP鏍堟嫾鎺ヨ搗鏉ョ殑鏁版嵁鍖呰秴榪囦簡MTU鍊鹼紝榪欎釜鏁版嵁浼氱珛鍗沖彂閫侊紝鑰屼笉絳夊緟鍓嶄竴涓暟鎹寘鐨凙CK紜淇℃伅銆傚湪浠ュお緗戜腑錛孴CP鐨凪TU(Maximum Transmission Unit)鍊兼槸1460瀛楄妭銆?/span></p><p><span style="font-size: 14px;">銆�銆�2銆佸鏋滆緗簡TCP_NODELAY閫夐」錛屽氨浼氱鐢∟agle綆楁硶錛屽簲鐢ㄧ▼搴忚皟鐢⊿end鍙戦�佺殑鏁版嵁鍖呬細绔嬪嵆琚姇閫掑埌緗戠粶錛岃�屾病鏈夊歡榪熴�?/span></p><p><span style="font-size: 14px;">銆�銆�涓轟簡鍦ㄥ簲鐢ㄥ眰浼樺寲鎬ц兘錛學insock鎶婂簲鐢ㄧ▼搴忚皟鐢⊿end鍙戦�佺殑鏁版嵁浠庡簲鐢ㄧ▼搴忕殑緙撳啿鍖哄鍒跺埌Winsock鍐呮牳緙撳啿鍖恒�侻icrosoft TCP鏍堝埄鐢ㄧ被浼糔agle綆楁硶鐨勬柟娉曪紝鍐沖畾浠�涔堟椂鍊欐墠瀹為檯鍦版妸鏁版嵁鎶曢�掑埌緗戠粶銆傚唴鏍哥紦鍐插尯鐨勯粯璁ゅぇ灝忔槸8K錛屼嬌鐢⊿O_SNDBUF閫夐」錛屽彲浠ユ敼鍙榃insock鍐呮牳緙撳啿鍖虹殑澶у皬銆傚鏋滄湁蹇呰鐨勮瘽錛學insock鑳界紦鍐插ぇ浜嶴O_SNDBUF緙撳啿鍖哄ぇ灝忕殑鏁版嵁銆傚湪緇濆ぇ澶氭暟鎯呭喌涓嬶紝搴旂敤紼嬪簭瀹屾垚Send璋冪敤浠呬粎琛ㄦ槑鏁版嵁琚鍒跺埌浜哤insock鍐呮牳緙撳啿鍖猴紝騫朵笉鑳借鏄庢暟鎹氨瀹為檯鍦拌鎶曢�掑埌浜嗙綉緇滀笂銆傚敮涓�涓�縐嶄緥澶栫殑鎯呭喌鏄細閫氳繃璁劇疆SO_SNDBUT涓?紱佺敤浜哤insock鍐呮牳緙撳啿鍖恒�?/span></p><p><span style="font-size: 14px;">銆�銆�Winsock浣跨敤涓嬮潰鐨勮鍒欐潵鍚戝簲鐢ㄧ▼搴忚〃鏄庝竴涓猄end璋冪敤鐨勫畬鎴愶細</span></p><p><span style="font-size: 14px;">銆�銆�1銆佸鏋渟ocket浠嶇劧鍦⊿O_SNDBUF闄愰鍐咃紝Winsock澶嶅埗搴旂敤紼嬪簭瑕佸彂閫佺殑鏁版嵁鍒板唴鏍哥紦鍐插尯錛屽畬鎴怱end璋冪敤銆?/span></p><p><span style="font-size: 14px;">銆�銆�2銆佸鏋淪ocket瓚呰繃浜哠O_SNDBUF闄愰騫朵笖鍏堝墠鍙湁涓�涓緙撳啿鐨勫彂閫佹暟鎹湪鍐呮牳緙撳啿鍖猴紝Winsock澶嶅埗瑕佸彂閫佺殑鏁版嵁鍒板唴鏍哥紦鍐插尯錛屽畬鎴怱end璋冪敤銆?/span></p><p><span style="font-size: 14px;">銆�銆�3銆佸鏋淪ocket瓚呰繃浜哠O_SNDBUF闄愰騫朵笖鍐呮牳緙撳啿鍖烘湁涓嶅彧涓�涓緙撳啿鐨勫彂閫佹暟鎹紝Winsock澶嶅埗瑕佸彂閫佺殑鏁版嵁鍒板唴鏍哥紦鍐插尯錛岀劧鍚庢姇閫掓暟鎹埌緗戠粶錛岀洿鍒癝ocket闄嶅埌SO_SNDBUF闄愰鍐呮垨鑰呭彧鍓╀綑涓�涓鍙戦�佺殑鏁版嵁錛屾墠瀹屾垚Send璋冪敤銆?/span></p><p><span style="font-size: 14px;">銆�銆�妗堜緥1</span></p><p><span style="font-size: 14px;">銆�銆�涓�涓猈insock TCP瀹㈡埛绔渶瑕佸彂閫?0000涓褰曞埌Winsock TCP鏈嶅姟绔紝淇濆瓨鍒版暟鎹簱銆傝褰曞ぇ灝忎粠20瀛楄妭鍒?00瀛楄妭涓嶇瓑銆傚浜庣畝鍗曠殑搴旂敤紼嬪簭閫昏緫錛屽彲鑳界殑璁捐鏂規濡備笅錛?/span></p><p><span style="font-size: 14px;">銆�銆�1銆佸鎴風浠ラ樆濉炴柟寮忓彂閫侊紝鏈嶅姟绔互闃誨鏂瑰紡鎺ユ敹銆?/span></p><p><span style="font-size: 14px;">銆�銆�2銆佸鎴風璁劇疆SO_SNDBUF涓?錛岀鐢∟agle綆楁硶錛岃姣忎釜鏁版嵁鍖呭崟鐙殑鍙戦�併�?/span></p><p><span style="font-size: 14px;">銆�銆�3銆佹湇鍔＄鍦ㄤ竴涓驚鐜腑璋冪敤Recv鎺ユ敹鏁版嵁鍖呫�傜粰Recv浼犻�?00瀛楄妭鐨勭紦鍐插尯浠ヤ究璁╂瘡涓褰曞湪涓�嬈ecv璋冪敤涓鑾峰彇鍒般�?/span></p><p><span style="font-size: 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14px;">銆�銆�鍦ㄨ繖涓璁′腑瀛樺湪涓や釜闂銆傜涓�錛屽瓨鍦ㄥ歡鏃墮棶棰樸�傚鎴風闇�瑕佽兘澶熷湪200姣鍐呭彂閫佷袱涓暟鎹寘鍒版湇鍔＄銆傚洜涓哄鎴風榛樿鎯呭喌涓嬩嬌鐢∟agle綆楁硶錛屽簲璇ヤ嬌鐢ㄩ粯璁ょ殑鍐呮牳緙撳啿鍖猴紝涓嶅簲璇O_SNDBUF涓?銆備竴鏃CP鏍堟嫾鎺ヨ搗鏉ョ殑鏁版嵁鍖呰秴榪嘙TU鍊鹼紝榪欎釜鏁版嵁鍖呬細绔嬪嵆琚彂閫侊紝涓嶇敤絳夊緟鍓嶄竴涓狝CK紜淇℃伅銆傜浜岋紝榪欎釜璁捐鏂規瀵規瘡涓�涓姝ゅ皬鐨勭殑鏁版嵁鍖呴兘璋冪敤涓�嬈end銆傚彂閫佽繖涔堝皬鐨勬暟鎹寘鏄笉寰堟湁鏁堢巼鐨勩�傚湪榪欑鎯呭喌涓嬶紝搴旇鎶婃瘡涓褰曡ˉ鍏呭埌100瀛楄妭騫朵笖姣忔璋冪敤Send鍙戦�?0涓褰曘�備負浜嗚鏈嶅姟绔煡閬撲竴嬈℃�誨叡鍙戦�佷簡澶氬皯涓褰曪紝瀹㈡埛绔彲浠ュ湪璁板綍鍓嶉潰甯︿竴涓ご淇℃伅銆?/span></p><p><span style="font-size: 14px;">銆�銆�妗堜緥浜岋細</span></p><p><span style="font-size: 14px;">銆�銆�涓�涓猈insock TCP瀹㈡埛绔▼搴忔墦寮�涓や釜榪炴帴鍜屼竴涓彁渚涜偂紲ㄦ姤浠鋒湇鍔＄殑Winsock TCP鏈嶅姟绔�氫俊銆傜涓�涓繛鎺ヤ綔涓哄懡浠ら�氶亾鐢ㄦ潵浼犺緭鑲＄エ緙栧彿鍒版湇鍔＄銆傜浜屼釜榪炴帴浣滀負鏁版嵁閫氶亾鐢ㄦ潵鎺ユ敹鑲＄エ鎶ヤ環銆備袱涓繛鎺ヨ寤虹珛鍚庯紝瀹㈡埛绔�氳繃鍛戒護閫氶亾鍙戦�佽偂紲ㄧ紪鍙峰埌鏈嶅姟绔紝鐒跺悗鍦ㄦ暟鎹�氶亾涓婄瓑寰呰繑鍥炵殑鑲＄エ鎶ヤ環淇℃伅銆傚鎴風鍦ㄦ帴鏀跺埌絎竴涓偂紲ㄦ姤浠蜂俊鎭悗鍙戦�佷笅涓�涓偂紲ㄧ紪鍙瘋姹傚埌鏈嶅姟绔�傚鎴風鍜屾湇鍔＄閮芥病鏈夎緗甋O_SNDBUF鍜孴CP_NODELAY閫夐」銆?/span></p><p><span style="font-size: 14px;">銆�銆�鎬ц兘錛?/span></p><p><span style="font-size: 14px;">銆�銆�嫻嬭瘯涓彂鐜幫紝瀹㈡埛绔瘡縐掑彧鑳借幏鍙栧埌5鏉℃姤浠蜂俊鎭�?/span></p><p><span style="font-size: 14px;">銆�銆�鍒嗘瀽錛?/span></p><p><span style="font-size: 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14px;">銆�銆�1銆佸鏋滄暟鎹墖孌典笉闇�瑕佺揣鎬ヤ紶杈撶殑璇濓紝搴旂敤紼嬪簭搴旇灝嗕粬浠嫾鎺ユ垚鏇村ぇ鐨勬暟鎹潡錛屽啀璋冪敤Send銆傚洜涓哄彂閫佺紦鍐插尯寰堝彲鑳借澶嶅埗鍒板唴鏍哥紦鍐插尯錛屾墍浠ョ紦鍐插尯涓嶅簲璇ュお澶э紝閫氬父姣?K灝忎竴鐐圭偣鏄緢鏈夋晥鐜囩殑銆傚彧瑕乄insock鍐呮牳緙撳啿鍖哄緱鍒頒竴涓ぇ浜嶮TU鍊肩殑鏁版嵁鍧楋紝灝變細鍙戦�佽嫢騫蹭釜鏁版嵁鍖咃紝鍓╀笅鏈�鍚庝竴涓暟鎹寘銆傚彂閫佹柟闄や簡鏈�鍚庝竴涓暟鎹寘錛岄兘涓嶄細琚?00姣鐨勮鏃跺櫒瑙﹀彂銆?/span></p><p><span style="font-size: 14px;">銆�銆�2銆佸鏋滃彲鑳界殑璇濓紝閬垮厤鍗曞悜鐨凷ocket鏁版嵁嫻佹帴榪炪�?/span></p><p><span style="font-size: 14px;">銆�銆�3銆佷笉瑕佽緗甋O_SNDBUF涓?錛岄櫎闈炴兂紜繚鏁版嵁鍖呭湪璋冪敤Send瀹屾垚涔嬪悗绔嬪嵆琚姇閫掑埌緗戠粶銆備簨瀹炰笂錛?K鐨勭紦鍐插尯閫傚悎澶у鏁版儏鍐碉紝涓嶉渶瑕侀噸鏂版敼鍙橈紝闄ら潪鏂拌緗殑緙撳啿鍖虹粡榪囨祴璇曠殑紜瘮榛樿澶у皬鏇撮珮鏁堛�?/span></p><p><br/></p></div>
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