锘??xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>&#27431;&#32654;&#29702;&#35770;&#22312;&#32447;&#25773;&#25918;&#44;&#22269;&#20135;&#31934;&#21697;&#33821;&#108;&#105;&#44;&#20813;&#25773;&#25918;&#22120;&#20122;&#27954;&#19968;&#21306;</title><link>http://www.shnenglu.com/ecopgm/archive/2008/03/28/45611.html</link><dc:creator>ecopgm</dc:creator><author>ecopgm</author><pubDate>Fri, 28 Mar 2008 03:28:00 GMT</pubDate><guid>http://www.shnenglu.com/ecopgm/archive/2008/03/28/45611.html</guid><wfw:comment>http://www.shnenglu.com/ecopgm/comments/45611.html</wfw:comment><comments>http://www.shnenglu.com/ecopgm/archive/2008/03/28/45611.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/ecopgm/comments/commentRss/45611.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/ecopgm/services/trackbacks/45611.html</trackback:ping><description><![CDATA[<p>鍏堣璇碩CP鏀跺寘鐨刢ontext錛堜笉瀹氶暱鍖咃級銆備竴鑸儏鍐碉紝鍙戦�佹柟鍙戦�佷竴涓寘錛岀劧鍚庢帴鏀舵柟鏀跺埌涓�涓寘錛岃繖鏄渶濂藉鐞嗙殑銆傜浜岀鎯呭喌錛屽綋姣忔鍙戠敓鐨勫寘姣旇緝?yōu)畯鏃跺Q屽彂閫佹暟鎹椂錛孴CP浼?xì)鍚敤浼樺寲绠楁硶锛尀畣澶氫釜灏忓寘闆嗕腑钃v鏉ュ彂閫侊紝浠ユ彁楂樹紶杈撴晥鐜囥�傛鏃舵帴鏀舵柟鐨剅ecv buffer涓紝鍙兘鍑虹幇涓嶆涓�涓寘銆傜涓夌鎯呭喌錛宺ecv buffer涓瘡嬈″彧涓�涓寘錛屼絾鎺ユ敹鏂規(guī)病鍙?qiáng)鏃跺彇鍖呭Q岃繖鏃秗ecv buffer涓細(xì)縐瘡澶氫釜鍖呫�?br>鐞嗘墍褰撶劧錛孴CP鏀跺寘瑕佽�冭檻鎵�鏈夎繖浜涙儏鍐點(diǎn)�備竴鑸潵璇存湁涓夌鏂規(guī)硶銆傜涓�縐嶏紝瀹氫箟濂介�氳鍗忚錛屽厛鏀跺寘澶達(dá)紝鐒跺悗鏍規(guī)嵁鍖呭ご涓殑娑堟伅鐪熷疄澶у皬錛屾帴鏀舵秷鎭墿浣欓儴鍒嗐�傜浜岀鏂規(guī)硶錛岄�氳鍗忚瑙勫畾濂芥瘡涓秷鎭殑寮�濮嬪拰緇撴潫鏍囪瘑絎︺�傜劧鍚庢瘡嬈ecv寰楀埌鐨勬暟鎹厛鏀懼埌涓�涓ぇ錛堟瘮濡備綘鐨勬渶澶acket鐨?鍊嶏級buffer涓紝鏈�鍚庡啀鏉ュ垎鏋愯繖涓猙uffer鍒嗗寘銆傜涓夌鏂規(guī)硶錛屽厛鐢╮ecv+MSG_PEEK鎺ユ敹鏌愪釜鍥哄畾闀垮害錛岀劧鍚庡鎺ユ敹鍒扮殑"鍖?榪涜鍒嗘瀽錛岀劧鍚庡仛鐪熸鐨剅ecv鎿嶄綔銆?br></p>
<img src ="http://www.shnenglu.com/ecopgm/aggbug/45611.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/ecopgm/" target="_blank">ecopgm</a> 2008-03-28 11:28 <a href="http://www.shnenglu.com/ecopgm/archive/2008/03/28/45611.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>楂樺茍鍙戝拰楂樿礋杞?/title><link>http://www.shnenglu.com/ecopgm/archive/2008/03/24/45314.html</link><dc:creator>ecopgm</dc:creator><author>ecopgm</author><pubDate>Mon, 24 Mar 2008 14:36:00 GMT</pubDate><guid>http://www.shnenglu.com/ecopgm/archive/2008/03/24/45314.html</guid><wfw:comment>http://www.shnenglu.com/ecopgm/comments/45314.html</wfw:comment><comments>http://www.shnenglu.com/ecopgm/archive/2008/03/24/45314.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/ecopgm/comments/commentRss/45314.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/ecopgm/services/trackbacks/45314.html</trackback:ping><description><![CDATA[鑳戒笉鑳芥帴鍙楃垎鍙戣繛鎺ワ紙騫跺彂搴﹀浣曪級錛屼富瑕佹槸鍙栧喅浜巃ccept鐨勯�熷害銆備竴涓猅CP榪炴帴鐨勫緩绔嬶紝瑕佸湪client鍜宻erver涔嬮棿錛屽畬鎴愪笁嬈℃彙鎵嬶紝鐒跺悗榪炴帴浼?xì)琚攽謭板畬鎴愰槦鍒椾腑锛宎ccept浠庡畬鎴愰槦鍒椾腑鍙栧嚭榪炴帴騫惰繑鍥炪�備換浣曞獎鍝峚ccept鍙栬繛鎺ョ殑鍥犵礌錛岄兘浼?xì)濯勫搷迤堝彂搴︺�備竴鑸瓥鐣ユ槸錛? 鐙珛澶勭悊accept錛? 浣跨敤epoll澶勭悊accept錛岃繖涓ょ鎯呭喌錛屽茍鍙戝害閮芥槸涓嶉敊鐨勩�?br>騫跺彂鍦版帴鍙椾簡榪欎箞澶氳繛鎺ワ紝騫朵笉浠ｈ〃鑳藉畬鍏ㄥ鐞嗐�傚亣濡傛湁寰堝榪炴帴鍚屾椂鍦ㄧ嚎錛宻erver accept鎴愬姛騫舵敹鍒頒簡鏁版嵁錛岃繖鏃舵秷鎭鏀懼埌娑堟伅闃熷垪涓紝絳夊緟閫昏緫綰跨▼鏉ュ鐞嗐�傚洜涓虹敓浜ц�咃紙鏀舵暟鎹級鐨勯�熷害鎬繪槸澶т簬娑堣垂鑰咃紙澶勭悊鏁版嵁錛夌殑閫熷害錛屽洜姝ゆ秷鎭槦鍒椾細(xì)鏈夎�冭檻嫻佹帶錛屼互鍏嶇郴緇熻祫婧愯鑰楀厜銆傝繖鏍鳳紝鏈変簺娑堟伅灝卞彲鑳戒涪澶便�傝繖灝辨槸鍚屾椂鍦ㄧ嚎榪炴帴鏁扮殑闂銆?br>鍓嶈�呮槸楂樺茍鍙戯紝鍚庤�呮槸楂樿礋杞姐�傝璁℃椂浼?xì)鏉冭　鍋忓悜銆?
<img src ="http://www.shnenglu.com/ecopgm/aggbug/45314.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/ecopgm/" target="_blank">ecopgm</a> 2008-03-24 22:36 <a href="http://www.shnenglu.com/ecopgm/archive/2008/03/24/45314.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>騫跺彂絳栫暐鎬葷粨 </title><link>http://www.shnenglu.com/ecopgm/archive/2008/03/24/45269.html</link><dc:creator>ecopgm</dc:creator><author>ecopgm</author><pubDate>Mon, 24 Mar 2008 06:43:00 GMT</pubDate><guid>http://www.shnenglu.com/ecopgm/archive/2008/03/24/45269.html</guid><wfw:comment>http://www.shnenglu.com/ecopgm/comments/45269.html</wfw:comment><comments>http://www.shnenglu.com/ecopgm/archive/2008/03/24/45269.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/ecopgm/comments/commentRss/45269.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/ecopgm/services/trackbacks/45269.html</trackback:ping><description><![CDATA[<p>騫跺彂鏈嶅姟鍣ㄦ湁涓夌甯歌鐨勬灦鏋勶細(xì)<br>1. 鍗曠嚎紼媏poll錛圗T闈為樆濉濱/O) +綰跨▼姹狅紝涔熷彨鍗婂悓姝ュ崐寮傛妯″紡銆傝繖縐嶆ā鍨嬫瘮杈冨父瑙侊紝鑰屼笖鍥犱負(fù)寮傛灞傚拰鍚屾灞備嬌鐢ㄦ秷鎭槦鍒椾紶閫掓秷鎭紝鏇村鏄撳疄鐜板娑堟伅鐨凢IFO澶勭悊銆傜己鐐瑰氨鏄嚎紼嬬殑鍚屾鍜屼笂涓嬫枃鍒囨崲寮�閿�姣旇緝澶с�?br>2. ConnectionPerThread+闃誨鍨婭/O銆傝繖鏄渶鍙よ�佺殑鏈嶅姟鍣ㄥ茍鍙戞ā鍨嬶紝涓嶅お閫傚悎鐜頒粖鐨勮繖浜涢珮騫跺彂楂樿礋杞芥湇鍔″櫒錛屽綋榪炴帴鏁板法澶х殑鏃跺�欙紝鍒涘緩閿�姣佺嚎紼嬬殑寮�閿�浼?xì)鏃犳硶鎵垮彈锛岒q朵笖鍐呮牳鍒涘緩綰跨▼鐨勯�熷害涔熶細(xì)鎴愪負(fù)鐡墮銆傝繖縐嶆ā鍨嬬殑涓�縐嶆敼榪涘瀷灝辨槸棰嗗鑰?璺熼殢鑰呮ā寮忥紝瀹冨惛鍙栫涓�縐嶆ā鍨嬩腑錛岀嚎紼嬫暟閲忎笉浼?xì)鑶ㄨ儉鐨勪紭鐐癸紝浣跨敤綰跨▼姹犳潵澶勭悊榪炴帴銆傛瘡褰撴湁榪炴帴鍒拌揪鏃訛紝閮戒嬌鐢ㄤ竴涓嚎紼嬮樆濉炲鐞嗭紝澶勭悊瀹屾垚鍚庯紝綰跨▼鍐嶅洖鍒扮嚎紼嬫睜涓紝榪欐牱鏈夐檺鐨勭嚎紼嬫ā鎷熷嚭浜咰onnectionPerThread銆備竴鑸潵璇達(dá)紝棰嗗鑰?璺熼殢鑰呮ā鍨嬫瘮絎竴縐嶆ā鍨嬫洿鍔犻珮鏁堬紝鍥犱負(fù)瀹冨噺灝戜簡綰跨▼鍚屾鍜屽垏鎹㈢殑寮�閿�錛屽畠鐨勭己鐐瑰氨鏄疐IFO寰堥毦淇濊瘉銆?br>3. 嫻佹按綰挎ā鍨嬨�傚墠闈袱縐嶆ā寮忛兘鏈変釜緙虹偣錛屽畠浠笉鑳借姳澶暱鏃墮棿澶勭悊閫昏緫錛屽洜涓哄湪澶欳PU緋葷粺涓婏紝鏌愪簺鑰楁椂鐨勯暱璇鋒眰鍙兘浼?xì)涓嶆柇鍗犱綇CPU錛岃�屽鑷寸煭璇鋒眰寰椾笉鍒板鐞嗭紝榪欎細(xì)浣挎煇浜汣PU闂茬疆銆備簬鏄繖縐嶆ā鍨嬫彁鍑猴紝灝嗚姹傚鐞嗙殑榪囩▼鍒掑垎姝ラ錛屼笉鍚岀殑姝ラ鑰冭檻涓嶅悓鐨勮祫婧愬鐞嗭紙姣斿CPU, DISK I/O絳夛級錛屾瘡涓楠や嬌鐢ㄥ崟鐙殑綰跨▼鎴栫嚎紼嬫睜銆傝繖鏍鋒瘮杈冭�楁椂鐨勬搷浣滃彲鑳介泦涓湪嫻佹按綰跨殑涓嬬駭錛岃�岀煭璇鋒眰涔熷彲浠ュ湪涓婄駭寰楀埌蹇�熷鐞嗐�傚洜涓哄悇綰х嚎紼嬩箣闂翠嬌鐢ㄦ秷鎭槦鍒椾紶閫掕姹傦紝涔熷緢瀹規(guī)槗瀹炵幇FIFO銆?/p>
<img src ="http://www.shnenglu.com/ecopgm/aggbug/45269.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/ecopgm/" target="_blank">ecopgm</a> 2008-03-24 14:43 <a href="http://www.shnenglu.com/ecopgm/archive/2008/03/24/45269.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>I/O絳栫暐灝忕粨</title><link>http://www.shnenglu.com/ecopgm/archive/2008/03/24/45268.html</link><dc:creator>ecopgm</dc:creator><author>ecopgm</author><pubDate>Mon, 24 Mar 2008 06:40:00 GMT</pubDate><guid>http://www.shnenglu.com/ecopgm/archive/2008/03/24/45268.html</guid><wfw:comment>http://www.shnenglu.com/ecopgm/comments/45268.html</wfw:comment><comments>http://www.shnenglu.com/ecopgm/archive/2008/03/24/45268.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/ecopgm/comments/commentRss/45268.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/ecopgm/services/trackbacks/45268.html</trackback:ping><description><![CDATA[<span>濡備綍楂樻晥澶勭悊澶氫釜<span>socket I/O</span>鐨勮鍐欙紝鏄彁楂樻湇鍔″櫒鎬ц兘鐨勯噸鐐歸棶棰樸�倁nix-like涓嬮潰錛岀幇鏈夋満鍒舵湁<span>select,poll, &nbsp;epoll,kqueue,/dev/poll</span>涓ゅぇ綾匯�?/span>
<p><span>Select</span><span>鏈変釜緙虹偣錛屽畠鐢?span>fd_set</span>綆＄悊鎵�鏈夎鐩戣鐨?span>I/O</span>鍙ユ焺錛屼絾鏄?span>fd_set</span>鏄竴涓綅鏁扮粍錛屽彧鑳芥帴鍙楀彞鏌勫彿灝忎簬<span>FD_SETSIZE</span>錛堥粯璁?span>1024</span>錛夌殑鍙ユ焺錛岃櫧鐒惰繘紼嬮粯璁ゅ彞鏌勫彿閮芥槸灝忎簬<span>1024</span>鐨勶紝浣嗘槸鍙互閫氳繃<span>ulimit &#8211;n</span>鏉ヤ慨鏀癸紝灝ゅ叾鏄繛鎺ユ暟瓚呰繃<span>1024</span>鏃跺繀闇�榪欎箞鍋氾紙瀹為檯鍙兘鏇村皯錛夛紝濡傛灉瑕佸皢澶т簬<span>1024</span>鐨勫彞鏌勬斁鍏?span>fd_set</span>錛屽氨鍙兘鍙戠敓鏁扮粍瓚婄晫紼嬪簭宕╂簝鐨勫満闈€�?/span></p>
<p><span>Poll</span><span>铏界劧瑙ｅ喅浜?span>FD_SETSIZE</span>闂錛屼絾鏄畠鍜?span>select</span>涓�鏍鳳紝閮芥湁鎬ц兘涓婄殑鐡墮銆傚畠浠兘浼?xì)闅忕潃榪炴帴鏁扮殑澧炲姞鎬ц兘鐩寸嚎涓嬮檷銆傝繖涓昏鏈変袱涓師鍥狅紝鍏朵竴鏄瘡嬈?span>select/poll</span>鎿嶄綔錛?span>kernel</span>閮戒細(xì)寤虹珛涓�涓綋鍓嶇嚎紼嬪叧蹇冪殑浜嬩歡鍒楄〃錛屽茍璁╃嚎紼嬮樆濉炲湪榪欎釜鍒楄〃涓婏紝榪欐槸寰堣�楁椂鐨勬搷浣溿�傚叾浜屾槸姣忔<span>select/poll</span>榪斿洖鍚庯紝綰跨▼閮借鎵弿鎵�鏈夊彞鏌勬潵<span>dispatch</span>宸插彂鐢熺殑浜嬩歡錛岃繖涔熸槸寰堣�楁椂鐨勩�傚綋榪炴帴鏁板法澶ф椂錛岃繖縐嶆秷鑰楃Н绱搗鏉ワ紝灝卞緢鍙椾笉浜嗐�?/span></p>
<p><span>涓轟簡瑙ｅ喅<span>select/poll</span>鐨勬�ц兘闂錛寀nix-like緋葷粺涓婂紑鍙戝嚭浜嗕笁濂楁柊鐨勫埄鍣?span>epoll</span>錛?span>kqueue</span>錛?span>/dev/poll</span>錛屽叾涓?span>epoll</span>鏄?span>linux</span>鐨勶紝<span>kqueue</span>鏄?span>freebsd</span>鐨勶紝<span>/dev/poll</span>鏄?span>Solaris涓?/span>鐨勶紝瀹冧滑鏄痵elect/poll鐨勬浛浠ｅ搧銆傚畠浠殑璁捐灝辨槸閽堝<span>select/poll</span>鐨勬�ц兘闂錛屼富瑕侀伩鍏?span>&nbsp;1銆?/span>姣忔璋冪敤閮藉緩绔嬩簨浠剁瓑寰呭垪琛紝鍙栬�屼唬涔嬪緩绔嬮暱鏈熺殑浜嬩歡鍏蟲敞鍒楄〃錛岃繖涓垪琛ㄥ彲閫氳繃鍙ユ焺錛堟瘮濡?span>epfd</span>錛夋潵澧炲姞鍜屽垹闄や簨浠躲�?span>2銆?/span>璋冪敤榪斿洖涔嬪悗錛屼笉鍐嶉渶瑕侀亶鍘嗘墍鏈夊彞鏌勮繘琛屽垎鍙戯紝鍐呮牳浼?xì)鐩存帴杩斿洖褰撳墠宸插彂鐢熺殑浜嬩欢銆備笉鐢ㄨ錛屾�ц兘鍦?span>select, poll</span>鍩虹涓婃湁浜嗗ぇ騫呮彁鍗囥�?br><br>瑕佹敞鎰忕殑鏄紝鍑℃槸浣跨敤readiness notification錛圠T)鎴栬�卹eadiness change notification錛圗T)鏈哄埗錛岄兘搴旇閰嶅悎闈為樆濉濱/O錛屽洜涓鴻繖縐嶄簨浠墮�氱煡錛屽茍涓嶄竴瀹氳〃紺烘枃浠舵弿榪扮鐪熸灝辯華錛屽鏋滄敹鍒伴�氱煡涔嬪悗鍘籸ead錛屽緢鏈夊彲鑳借繘鍏ラ樆濉炵姸鎬侊紝榪欎細(xì)涓ラ噸褰卞搷鏈嶅姟鍣ㄧ殑騫跺彂鎬ц兘錛屽悓鏃跺ET妯″紡錛屼笉鑳芥紡鎺変換浣曚簨浠剁殑澶勭悊錛屽茍涓旀瘡嬈￠兘搴旇璇誨埌socket榪斿洖EWOULDBLOCK涓烘錛屼笉鐒惰繖涓猻ocket涔嬪悗浼?xì)姘笜q滀繚鎸佹矇榛樸�?/span></p>
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