{"id":478088,"date":"2023-08-09T09:27:19","date_gmt":"2023-08-09T09:27:19","guid":{"rendered":""},"modified":"2023-09-05T11:16:02","modified_gmt":"2023-09-05T11:16:02","slug":"mutual-exclusion","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/mutual-exclusion\/","title":{"rendered":"Lo\u1ea1i tr\u1eeb l\u1eabn nhau"},"content":{"rendered":"<p>Lo\u1ea1i tr\u1eeb l\u1eabn nhau l\u00e0 m\u1ed9t nguy\u00ean t\u1eafc trong t\u00ednh to\u00e1n \u0111\u1ed3ng th\u1eddi nh\u1eb1m \u0111\u1ea3m b\u1ea3o r\u1eb1ng hai ho\u1eb7c nhi\u1ec1u quy tr\u00ecnh kh\u00f4ng truy c\u1eadp \u0111\u1ed3ng th\u1eddi v\u00e0o t\u00e0i nguy\u00ean d\u00f9ng chung ho\u1eb7c ph\u1ea7n quan tr\u1ecdng c\u1ee7a ch\u01b0\u01a1ng tr\u00ecnh. N\u00f3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m ch\u1ec9 c\u00f3 m\u1ed9t ti\u1ebfn tr\u00ecnh c\u00f3 th\u1ec3 th\u1ef1c thi m\u1ed9t ph\u1ea7n quan tr\u1ecdng ho\u1eb7c thao t\u00e1c d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c chia s\u1ebb.<\/p>\n<h2>L\u1ecbch s\u1eed v\u1ec1 ngu\u1ed3n g\u1ed1c c\u1ee7a s\u1ef1 lo\u1ea1i tr\u1eeb l\u1eabn nhau v\u00e0 s\u1ef1 \u0111\u1ec1 c\u1eadp \u0111\u1ea7u ti\u00ean v\u1ec1 n\u00f3<\/h2>\n<p>Kh\u00e1i ni\u1ec7m lo\u1ea1i tr\u1eeb l\u1eabn nhau \u0111\u01b0\u1ee3c \u0111\u01b0a ra v\u00e0o \u0111\u1ea7u nh\u1eefng n\u0103m 1960. EW Dijkstra, m\u1ed9t nh\u00e0 khoa h\u1ecdc m\u00e1y t\u00ednh ti\u00ean phong, \u0111\u00e3 \u0111\u1ec1 xu\u1ea5t m\u1ed9t gi\u1ea3i ph\u00e1p d\u1ef1a tr\u00ean ph\u1ea7n m\u1ec1m cho v\u1ea5n \u0111\u1ec1 \u0111\u1ea3m b\u1ea3o r\u1eb1ng t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m ch\u1ec9 c\u00f3 m\u1ed9t quy tr\u00ecnh c\u00f3 th\u1ec3 truy c\u1eadp c\u00e1c t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c chia s\u1ebb. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e1c thu\u1eadt to\u00e1n v\u00e0 giao th\u1ee9c \u0111\u1ec3 qu\u1ea3n l\u00fd c\u00e1c quy tr\u00ecnh \u0111\u1ed3ng th\u1eddi, khai sinh ra kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n trong khoa h\u1ecdc m\u00e1y t\u00ednh v\u00e0 h\u1ec7 \u0111i\u1ec1u h\u00e0nh.<\/p>\n<h2>Th\u00f4ng tin chi ti\u1ebft v\u1ec1 lo\u1ea1i tr\u1eeb l\u1eabn nhau<\/h2>\n<p>Lo\u1ea1i tr\u1eeb l\u1eabn nhau nh\u1eb1m m\u1ee5c \u0111\u00edch ng\u0103n ch\u1eb7n xung \u0111\u1ed9t v\u00e0 m\u00e2u thu\u1eabn ph\u00e1t sinh khi nhi\u1ec1u quy tr\u00ecnh c\u1ed1 g\u1eafng truy c\u1eadp ho\u1eb7c s\u1eeda \u0111\u1ed5i c\u00e1c t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c chia s\u1ebb c\u00f9ng m\u1ed9t l\u00fac. N\u00f3 \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng c\u1ee7a c\u00e1c \u1ee9ng d\u1ee5ng \u0111a lu\u1ed3ng v\u00e0 h\u1ec7 th\u1ed1ng ph\u00e2n t\u00e1n.<\/p>\n<h3>Kh\u00e1i ni\u1ec7m v\u00e0 nguy\u00ean t\u1eafc<\/h3>\n<ol>\n<li><strong>Lo\u1ea1i tr\u1eeb<\/strong>: T\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m ch\u1ec9 c\u00f3 m\u1ed9t ti\u1ebfn tr\u00ecnh c\u00f3 th\u1ec3 v\u00e0o ph\u1ea7n quan tr\u1ecdng.<\/li>\n<li><strong>Tho\u00e1t kh\u1ecfi b\u1ebf t\u1eafc<\/strong>: C\u00e1c ti\u1ebfn tr\u00ecnh kh\u00f4ng \u0111\u01b0\u1ee3c \u1edf tr\u1ea1ng th\u00e1i ch\u1edd \u0111\u1ee3i nhau v\u00f4 th\u1eddi h\u1ea1n.<\/li>\n<li><strong>T\u1ef1 do kh\u1ecfi n\u1ea1n \u0111\u00f3i<\/strong>: M\u1ecdi qu\u00e1 tr\u00ecnh y\u00eau c\u1ea7u quy\u1ec1n truy c\u1eadp cu\u1ed1i c\u00f9ng ph\u1ea3i \u0111\u01b0\u1ee3c ph\u00e9p v\u00e0o ph\u1ea7n quan tr\u1ecdng.<\/li>\n<\/ol>\n<h3>Thu\u1eadt to\u00e1n chung<\/h3>\n<ul>\n<li>Thu\u1eadt to\u00e1n Dijkstra<\/li>\n<li>Thu\u1eadt to\u00e1n Peterson<\/li>\n<li>Thu\u1eadt to\u00e1n l\u00e0m b\u00e1nh c\u1ee7a Lamport<\/li>\n<li>Ng\u1eef ngh\u0129a<\/li>\n<\/ul>\n<h2>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a s\u1ef1 lo\u1ea1i tr\u1eeb l\u1eabn nhau<\/h2>\n<p>Ho\u1ea1t \u0111\u1ed9ng lo\u1ea1i tr\u1eeb l\u1eabn nhau bao g\u1ed3m nhi\u1ec1u th\u00e0nh ph\u1ea7n kh\u00e1c nhau ph\u1ed1i h\u1ee3p v\u1edbi nhau \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee5c ti\u00eau.<\/p>\n<h3>Thu\u1eadt to\u00e1n v\u00e0 giao th\u1ee9c<\/h3>\n<p>C\u00e1c thu\u1eadt to\u00e1n v\u00e0 giao th\u1ee9c kh\u00e1c nhau th\u1ef1c thi lo\u1ea1i tr\u1eeb l\u1eabn nhau, th\u01b0\u1eddng s\u1eed d\u1ee5ng c\u00e1c c\u01a1 ch\u1ebf kh\u00f3a, c\u1edd v\u00e0 ng\u1eef ngh\u0129a.<\/p>\n<h3>\u1ed4 kh\u00f3a v\u00e0 ch\u00eca kh\u00f3a<\/h3>\n<p>Kh\u00f3a l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n trong vi\u1ec7c lo\u1ea1i tr\u1eeb l\u1eabn nhau, trong \u0111\u00f3 m\u1ed9t quy tr\u00ecnh kh\u00f3a t\u00e0i nguy\u00ean trong khi s\u1eed d\u1ee5ng v\u00e0 m\u1edf kh\u00f3a khi ho\u00e0n t\u1ea5t.<\/p>\n<h3>K\u1ef9 thu\u1eadt \u0111\u1ed3ng b\u1ed9 h\u00f3a<\/h3>\n<p>C\u00e1c k\u1ef9 thu\u1eadt \u0111\u1ed3ng b\u1ed9 h\u00f3a kh\u00e1c nhau \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng, ch\u1eb3ng h\u1ea1n nh\u01b0 kh\u00f3a quay, mutexes v\u00e0 semaphores, \u0111\u1ec3 x\u1eed l\u00fd v\u1ea5n \u0111\u1ec1 ph\u1ea7n quan tr\u1ecdng.<\/p>\n<h2>Ph\u00e2n t\u00edch c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh c\u1ee7a lo\u1ea1i tr\u1eeb l\u1eabn nhau<\/h2>\n<ul>\n<li><strong>S\u1ef1 c\u00e1ch ly<\/strong>: \u0110\u1ea3m b\u1ea3o r\u1eb1ng m\u1ed9t quy tr\u00ecnh kh\u00f4ng can thi\u1ec7p v\u00e0o ho\u1ea1t \u0111\u1ed9ng c\u1ee7a quy tr\u00ecnh kh\u00e1c trong ph\u1ea7n quan tr\u1ecdng.<\/li>\n<li><strong>\u0110\u1ed3ng th\u1eddi ki\u1ec3m so\u00e1t<\/strong>: Cung c\u1ea5p qu\u1ea3n l\u00fd vi\u1ec7c th\u1ef1c hi\u1ec7n \u0111\u1ed3ng th\u1eddi c\u00e1c ti\u1ebfn tr\u00ecnh.<\/li>\n<li><strong>\u0110\u1ed9 b\u1ec1n<\/strong>: Cho ph\u00e9p kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ed7i v\u00e0 ph\u1ee5c h\u1ed3i.<\/li>\n<li><strong>Hi\u1ec7u qu\u1ea3<\/strong>: Cho ph\u00e9p s\u1eed d\u1ee5ng t\u00e0i nguy\u00ean hi\u1ec7u qu\u1ea3.<\/li>\n<\/ul>\n<h2>C\u00e1c lo\u1ea1i lo\u1ea1i tr\u1eeb l\u1eabn nhau<\/h2>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c lo\u1ea1i c\u01a1 ch\u1ebf lo\u1ea1i tr\u1eeb l\u1eabn nhau kh\u00e1c nhau:<\/p>\n<table>\n<thead>\n<tr>\n<th>Ki\u1ec3u<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>kh\u00f3a xoay<\/td>\n<td>M\u1ed9t ti\u1ebfn tr\u00ecnh li\u00ean t\u1ee5c ki\u1ec3m tra kh\u00f3a cho \u0111\u1ebfn khi n\u00f3 s\u1eb5n s\u00e0ng.<\/td>\n<\/tr>\n<tr>\n<td>Mutex<\/td>\n<td>S\u1eed d\u1ee5ng c\u01a1 ch\u1ebf kh\u00f3a, ch\u1ec9 cho ph\u00e9p m\u1ed9t lu\u1ed3ng \u0111i v\u00e0o ph\u1ea7n quan tr\u1ecdng.<\/td>\n<\/tr>\n<tr>\n<td>Semaphore<\/td>\n<td>M\u1ed9t d\u1ea1ng mutex t\u1ed5ng qu\u00e1t h\u01a1n, s\u1eed d\u1ee5ng t\u00edn hi\u1ec7u v\u00e0 b\u1ed9 \u0111\u1ebfm.<\/td>\n<\/tr>\n<tr>\n<td>Kh\u00f3a \u0111\u1ea7u \u0111\u1ecdc-ghi<\/td>\n<td>Cho ph\u00e9p nhi\u1ec1u ng\u01b0\u1eddi \u0111\u1ecdc ho\u1eb7c m\u1ed9t ng\u01b0\u1eddi vi\u1ebft duy nh\u1ea5t truy c\u1eadp t\u00e0i nguy\u00ean.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1c c\u00e1ch s\u1eed d\u1ee5ng lo\u1ea1i tr\u1eeb l\u1eabn nhau, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p c\u1ee7a ch\u00fang<\/h2>\n<h3>C\u00e1ch s\u1eed d\u1ee5ng<\/h3>\n<ul>\n<li>\u0110a lu\u1ed3ng<\/li>\n<li>Ki\u1ec3m so\u00e1t \u0111\u1ed3ng th\u1eddi c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/li>\n<li>H\u1ec7 th\u1ed1ng ph\u00e2n ph\u1ed1i<\/li>\n<\/ul>\n<h3>C\u00e1c v\u1ea5n \u0111\u1ec1<\/h3>\n<ul>\n<li>B\u1ebf t\u1eafc<\/li>\n<li>\u0110\u00f3i<\/li>\n<li>\u0110\u1ea3o ng\u01b0\u1ee3c \u01b0u ti\u00ean<\/li>\n<\/ul>\n<h3>C\u00e1c gi\u1ea3i ph\u00e1p<\/h3>\n<ul>\n<li>H\u1ebft gi\u1edd<\/li>\n<li>T\u0103ng c\u01b0\u1eddng m\u1ee9c \u0111\u1ed9 \u01b0u ti\u00ean<\/li>\n<li>Kh\u00f3a ph\u00e2n c\u1ea5p<\/li>\n<\/ul>\n<h2>C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 so s\u00e1nh v\u1edbi c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1<\/h2>\n<p>So s\u00e1nh c\u00e1c c\u01a1 ch\u1ebf lo\u1ea1i tr\u1eeb l\u1eabn nhau:<\/p>\n<table>\n<thead>\n<tr>\n<th>\u0110\u1eb7c tr\u01b0ng<\/th>\n<th>Mutex<\/th>\n<th>Semaphore<\/th>\n<th>kh\u00f3a xoay<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Hi\u1ec7u qu\u1ea3<\/td>\n<td>V\u1eeba ph\u1ea3i<\/td>\n<td>Cao<\/td>\n<td>Th\u1ea5p<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ed9 ph\u1ee9c t\u1ea1p<\/td>\n<td>Th\u1ea5p<\/td>\n<td>V\u1eeba ph\u1ea3i<\/td>\n<td>Cao<\/td>\n<\/tr>\n<tr>\n<td>Kh\u1ea3 n\u0103ng \u1ee9ng d\u1ee5ng<\/td>\n<td>T\u00e0i nguy\u00ean \u0111\u01a1n<\/td>\n<td>Nhi\u1ec1u t\u00e0i nguy\u00ean<\/td>\n<td>B\u1eadn ch\u1edd \u0111\u1ee3i<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ee7a t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn lo\u1ea1i tr\u1eeb l\u1eabn nhau<\/h2>\n<p>T\u01b0\u01a1ng lai c\u1ee7a s\u1ef1 lo\u1ea1i tr\u1eeb l\u1eabn nhau c\u00f3 th\u1ec3 s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1ecbnh h\u00ecnh b\u1edfi c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi n\u1ed5i nh\u01b0 \u0111i\u1ec7n to\u00e1n l\u01b0\u1ee3ng t\u1eed, \u0111i\u1ec7n to\u00e1n ranh gi\u1edbi v\u00e0 nh\u1eefng ti\u1ebfn b\u1ed9 trong tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o. Nh\u1eefng c\u00f4ng ngh\u1ec7 n\u00e0y s\u1ebd \u0111\u00f2i h\u1ecfi ph\u1ea3i ph\u00e1t tri\u1ec3n c\u00e1c thu\u1eadt to\u00e1n v\u00e0 c\u01a1 ch\u1ebf lo\u1ea1i tr\u1eeb l\u1eabn nhau ph\u1ee9c t\u1ea1p h\u01a1n.<\/p>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft m\u00e1y ch\u1ee7 proxy \u0111\u1ec3 lo\u1ea1i tr\u1eeb l\u1eabn nhau<\/h2>\n<p>C\u00e1c m\u00e1y ch\u1ee7 proxy nh\u01b0 OneProxy c\u00f3 th\u1ec3 t\u1eadn d\u1ee5ng c\u00e1c nguy\u00ean t\u1eafc lo\u1ea1i tr\u1eeb l\u1eabn nhau \u0111\u1ec3 qu\u1ea3n l\u00fd c\u00e1c y\u00eau c\u1ea7u v\u00e0 k\u1ebft n\u1ed1i \u0111\u1ed3ng th\u1eddi m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. B\u1eb1ng c\u00e1ch \u0111\u1ea3m b\u1ea3o r\u1eb1ng t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m ch\u1ec9 c\u00f3 m\u1ed9t quy tr\u00ecnh c\u00f3 th\u1ec3 x\u1eed l\u00fd m\u1ed9t t\u00e0i nguy\u00ean ho\u1eb7c k\u1ebft n\u1ed1i c\u1ee5 th\u1ec3, m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 ng\u0103n ng\u1eeba xung \u0111\u1ed9t, t\u0103ng c\u01b0\u1eddng b\u1ea3o m\u1eadt v\u00e0 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<ul>\n<li><a href=\"http:\/\/example.com\/dijkstra\" target=\"_new\" rel=\"noopener nofollow\">B\u00e0i vi\u1ebft c\u1ee7a Dijkstra v\u1ec1 lo\u1ea1i tr\u1eeb l\u1eabn nhau<\/a><\/li>\n<li><a href=\"http:\/\/example.com\/semaphores\" target=\"_new\" rel=\"noopener nofollow\">Gi\u1edbi thi\u1ec7u v\u1ec1 Semaphores<\/a><\/li>\n<li><a href=\"https:\/\/oneproxy.pro\/vn\/\" target=\"_new\" rel=\"noopener\">Trang web ch\u00ednh th\u1ee9c c\u1ee7a OneProxy<\/a><\/li>\n<li><a href=\"http:\/\/example.com\/concurrency\" target=\"_new\" rel=\"noopener nofollow\">Th\u1ef1c ti\u1ec5n hi\u1ec7n \u0111\u1ea1i trong ki\u1ec3m so\u00e1t \u0111\u1ed3ng th\u1eddi<\/a><\/li>\n<\/ul>","protected":false},"featured_media":478089,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-478088","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Mutual Exclusion<\/mark>","faq_items":[{"question":"What is Mutual Exclusion?","answer":"<p>Mutual exclusion is a fundamental principle in concurrent computing that ensures only one process at a time can access a shared resource or critical section, thus preventing conflicts and inconsistencies in multi-threaded applications and distributed systems.<\/p>"},{"question":"Who introduced the concept of Mutual Exclusion, and when?","answer":"<p>E.W. Dijkstra introduced the concept of mutual exclusion in the early 1960s. He proposed a software-based solution to prevent multiple processes from accessing shared resources simultaneously.<\/p>"},{"question":"What are some common algorithms used to implement Mutual Exclusion?","answer":"<p>Some common algorithms used to implement mutual exclusion include Dijkstra's Algorithm, Peterson's Algorithm, Lamport's Bakery Algorithm, and Semaphores.<\/p>"},{"question":"How does Mutual Exclusion work internally?","answer":"<p>Mutual exclusion works through various components, including different algorithms and protocols, locks and keys, and synchronization techniques like spin locks, mutexes, and semaphores.<\/p>"},{"question":"What types of Mutual Exclusion exist?","answer":"<p>Different types of mutual exclusion mechanisms include Spinlock, Mutex, Semaphore, and Reader-Writer Lock, each with specific characteristics and use cases.<\/p>"},{"question":"What are the key problems related to the use of Mutual Exclusion, and how can they be solved?","answer":"<p>Some key problems related to mutual exclusion are Deadlocks, Starvation, and Priority Inversion. Solutions to these problems include implementing timeouts, priority boosting, and lock hierarchies.<\/p>"},{"question":"How are Proxy Servers like OneProxy associated with Mutual Exclusion?","answer":"<p>Proxy servers like OneProxy may use mutual exclusion principles to manage concurrent connections and requests. This ensures that only one process can handle a particular resource or connection at a time, preventing conflicts and enhancing performance.<\/p>"},{"question":"What are the future perspectives and technologies related to Mutual Exclusion?","answer":"<p>The future of mutual exclusion is likely to be shaped by emerging technologies like quantum computing, edge computing, and advancements in artificial intelligence. These will necessitate the development of more sophisticated mutual exclusion algorithms and mechanisms.<\/p>"},{"question":"Where can I find more information about Mutual Exclusion?","answer":"<p>You can find more information about Mutual Exclusion through various resources, including Dijkstra's original paper on Mutual Exclusion, introductions to semaphores, modern practices in concurrency control, and OneProxy's official website. Links to these resources are provided in the \"Related Links\" section of the article.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/478088","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/478088\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/478089"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=478088"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}