{"id":592,"date":"2026-04-04T00:36:58","date_gmt":"2026-04-04T00:36:58","guid":{"rendered":"https:\/\/www.viz-tools.com\/vi\/uml-timing-diagram-concurrency-guide\/"},"modified":"2026-04-04T00:36:58","modified_gmt":"2026-04-04T00:36:58","slug":"uml-timing-diagram-concurrency-guide","status":"publish","type":"post","link":"https:\/\/www.viz-tools.com\/vi\/uml-timing-diagram-concurrency-guide\/","title":{"rendered":"Th\u1eafng nhanh v\u1edbi s\u01a1 \u0111\u1ed3 Th\u1eddi gian UML: Tr\u1ef1c quan h\u00f3a c\u00e1c v\u1ea5n \u0111\u1ec1 \u0111\u1ed3ng th\u1eddi ch\u1ec9 trong 30 ph\u00fat"},"content":{"rendered":"

\u0110\u1ed3ng th\u1eddi l\u00e0 m\u1ed9t trong nh\u1eefng th\u00e1ch th\u1ee9c dai d\u1eb3ng nh\u1ea5t trong thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng. C\u00e1c lu\u1ed3ng, ti\u1ebfn tr\u00ecnh v\u00e0 s\u1ef1 ki\u1ec7n b\u1ea5t \u0111\u1ed3ng b\u1ed9 th\u01b0\u1eddng va ch\u1ea1m theo nh\u1eefng c\u00e1ch kh\u00f3 d\u1ef1 \u0111o\u00e1n trong qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n. Khi s\u01a1 \u0111\u1ed3 lu\u1ed3ng th\u00f4ng th\u01b0\u1eddng hay s\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 kh\u00f4ng \u0111\u1ee7 \u0111\u1ec3 ghi l\u1ea1i kh\u00eda c\u1ea1nh th\u1eddi gian c\u1ee7a c\u00e1c t\u01b0\u01a1ng t\u00e1c n\u00e0y, th\u00ec m\u1ed9tS\u01a1 \u0111\u1ed3 Th\u1eddi gian UML<\/strong>tr\u1edf th\u00e0nh c\u00f4ng c\u1ee5 thi\u1ebft y\u1ebfu \u0111\u1ec3 l\u00e0m r\u00f5 v\u1ea5n \u0111\u1ec1.<\/p>\n

H\u01b0\u1edbng d\u1eabn n\u00e0y cung c\u1ea5p m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn c\u00f3 c\u1ea5u tr\u00fac \u0111\u1ec3 tr\u1ef1c quan h\u00f3a c\u00e1c r\u00e0ng bu\u1ed9c v\u1ec1 th\u1eddi gian v\u00e0 h\u00e0nh vi \u0111\u1ed3ng th\u1eddi. Ch\u00fang ta s\u1ebd \u0111i t\u1eeb c\u00e1c \u0111\u1ecbnh ngh\u0129a c\u01a1 b\u1ea3n \u0111\u1ebfn \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf, t\u1eadp trung v\u00e0o vi\u1ec7c ph\u00e1t hi\u1ec7n c\u00e1c \u0111i\u1ec1u ki\u1ec7n c\u1ea1nh tranh v\u00e0 l\u1ed7i \u0111\u1ed3ng b\u1ed9 h\u00f3a. \u0110\u1ebfn cu\u1ed1i bu\u1ed5i h\u1ecdc n\u00e0y, b\u1ea1n s\u1ebd hi\u1ec3u c\u00e1ch x\u00e2y d\u1ef1ng c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 m\u00e0 kh\u00f4ng c\u1ea7n d\u1ef1a v\u00e0o c\u00f4ng c\u1ee5 ph\u1ee9c t\u1ea1p hay \u0111\u00e0o t\u1ea1o k\u00e9o d\u00e0i.<\/p>\n

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\"Whimsical<\/figure>\n<\/div>\n

Hi\u1ec3u r\u00f5 m\u1ee5c \u0111\u00edch c\u1ed1t l\u00f5i \ud83c\udfaf<\/h2>\n

S\u01a1 \u0111\u1ed3 Th\u1eddi gian l\u00e0 m\u1ed9t s\u01a1 \u0111\u1ed3 h\u00e0nh vi cho th\u1ea5y c\u00e1ch c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i theo th\u1eddi gian. Kh\u00e1c v\u1edbi S\u01a1 \u0111\u1ed3 Th\u1ee9 t\u1ef1, t\u1eadp trung v\u00e0o th\u1ee9 t\u1ef1 c\u00e1c tin nh\u1eafn, S\u01a1 \u0111\u1ed3 Th\u1eddi gian t\u1eadp trung v\u00e0o m\u1ed1i quan h\u1ec7 th\u1eddi gian ch\u00ednh x\u00e1c gi\u1eefa c\u00e1c s\u1ef1 ki\u1ec7n v\u00e0 tr\u1ea1ng th\u00e1i. S\u1ef1 ph\u00e2n bi\u1ec7t n\u00e0y r\u1ea5t quan tr\u1ecdng khi x\u1eed l\u00fd c\u00e1c \u0111\u01b0\u1eddng th\u1ef1c thi song song.<\/p>\n

Khi nhi\u1ec1u th\u00e0nh ph\u1ea7n ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed3ng th\u1eddi, th\u1eddi gian t\u01b0\u01a1ng \u0111\u1ed1i c\u1ee7a c\u00e1c h\u00e0nh \u0111\u1ed9ng c\u1ee7a ch\u00fang quy\u1ebft \u0111\u1ecbnh \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a h\u1ec7 th\u1ed1ng. M\u1ed9t \u0111\u1ed9 tr\u1ec5 \u1edf m\u1ed9t lu\u1ed3ng c\u00f3 th\u1ec3 l\u00e0m c\u1ea1n ki\u1ec7t lu\u1ed3ng kh\u00e1c, ho\u1eb7c m\u1ed9t t\u00edn hi\u1ec7u \u0111\u1ebfn h\u01a1i mu\u1ed9n c\u00f3 th\u1ec3 k\u00edch ho\u1ea1t m\u1ed9t tr\u1ea1ng th\u00e1i kh\u00f4ng h\u1ee3p l\u1ec7. Vi\u1ec7c tr\u1ef1c quan h\u00f3a c\u00e1c m\u1ed1i quan h\u1ec7 n\u00e0y gi\u00fap c\u00e1c ki\u1ebfn tr\u00fac s\u01b0 ph\u00e1t hi\u1ec7n c\u00e1c l\u1ed7i ti\u1ec1m \u1ea9n tr\u01b0\u1edbc khi vi\u1ebft m\u00e3.<\/p>\n

T\u1ea1i sao S\u01a1 \u0111\u1ed3 Th\u1eddi gian l\u1ea1i quan tr\u1ecdng \u0111\u1ed1i v\u1edbi \u0111\u1ed3ng th\u1eddi<\/h3>\n
    \n
  • Kh\u1ea3 n\u0103ng nh\u00ecn th\u1ea5y s\u1ef1 ch\u1ed3ng l\u1ea5n:<\/strong>B\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y ch\u00ednh x\u00e1c khi n\u00e0o hai ti\u1ebfn tr\u00ecnh c\u00f9ng chi\u1ebfm d\u1ee5ng m\u1ed9t t\u00e0i nguy\u00ean.<\/li>\n
  • X\u00e1c minh th\u1eddi h\u1ea1n:<\/strong>C\u00e1c thao t\u00e1c quan tr\u1ecdng ph\u1ea3i ho\u00e0n th\u00e0nh trong nh\u1eefng kho\u1ea3ng th\u1eddi gian c\u1ee5 th\u1ec3; s\u01a1 \u0111\u1ed3 n\u00e0y l\u00e0m n\u1ed5i b\u1eadt nh\u1eefng kho\u1ea3ng th\u1eddi gian \u0111\u00f3.<\/li>\n
  • Chuy\u1ec3n tr\u1ea1ng th\u00e1i:<\/strong>N\u00f3 theo d\u00f5i c\u00e1ch m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee5 th\u1ec3 thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i theo th\u1eddi gian tr\u00f4i qua, ch\u1ee9 kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 nh\u1eefng tin nh\u1eafn n\u00f3 nh\u1eadn \u0111\u01b0\u1ee3c.<\/li>\n
  • Ph\u00e2n t\u00edch t\u00ednh song song:<\/strong>N\u00f3 m\u00f4 h\u00ecnh h\u00f3a r\u00f5 r\u00e0ng c\u00e1c lu\u1ed3ng \u0111\u1ed3ng th\u1eddi, gi\u00fap l\u00e0m r\u00f5 h\u01a1n kh\u1ea3 n\u0103ng quan s\u00e1t t\u01b0\u01a1ng t\u00e1c so v\u1edbi s\u01a1 \u0111\u1ed3 lu\u1ed3ng tuy\u1ebfn t\u00ednh.<\/li>\n<\/ul>\n

    C\u1ea5u t\u1ea1o c\u1ee7a S\u01a1 \u0111\u1ed3 Th\u1eddi gian \ud83d\udee0\ufe0f<\/h2>\n

    Tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u quy tr\u00ecnh 30 ph\u00fat, c\u1ea7n hi\u1ec3u r\u00f5 k\u00fd hi\u1ec7u. C\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y d\u1ef1a v\u00e0o tr\u1ee5c th\u1eddi gian ngang v\u00e0 c\u00e1c \u0111\u01b0\u1eddng \u0111\u1eddi d\u1ecdc. M\u1ed7i th\u00e0nh ph\u1ea7n \u0111\u1ec1u c\u00f3 m\u1ee5c \u0111\u00edch c\u1ee5 th\u1ec3 trong vi\u1ec7c truy\u1ec1n \u0111\u1ea1t c\u00e1c r\u00e0ng bu\u1ed9c v\u1ec1 th\u1eddi gian.<\/p>\n

    C\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh<\/h3>\n
      \n
    • \u0110\u01b0\u1eddng \u0111\u1eddi:<\/strong>C\u00e1c \u0111\u01b0\u1eddng \u0111\u1ee9t \u0111o\u1ea1n d\u1ecdc \u0111\u1ea1i di\u1ec7n cho s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng ho\u1eb7c m\u1ed9t th\u00e0nh ph\u1ea7n h\u1ec7 th\u1ed1ng. Trong tr\u01b0\u1eddng h\u1ee3p \u0111\u1ed3ng th\u1eddi, m\u1ed7i lu\u1ed3ng ho\u1eb7c ti\u1ebfn tr\u00ecnh s\u1ebd c\u00f3 \u0111\u01b0\u1eddng \u0111\u1eddi ri\u00eang.<\/li>\n
    • Tr\u1ee5c th\u1eddi gian:<\/strong>Tr\u1ee5c ngang \u1edf ph\u00eda tr\u00ean cho th\u1ea5y s\u1ef1 ti\u1ebfn tri\u1ec3n c\u1ee7a th\u1eddi gian. Th\u01b0\u1eddng l\u00e0 tuy\u1ebfn t\u00ednh, nh\u01b0ng c\u00f3 th\u1ec3 \u0111\u1ea1i di\u1ec7n cho th\u1eddi gian logic trong c\u00e1c h\u1ec7 th\u1ed1ng ph\u00e2n t\u00e1n.<\/li>\n
    • Thanh k\u00edch ho\u1ea1t:<\/strong>C\u00e1c h\u00ecnh ch\u1eef nh\u1eadt \u0111\u01b0\u1ee3c \u0111\u1eb7t tr\u00ean \u0111\u01b0\u1eddng \u0111\u1eddi cho bi\u1ebft khi n\u00e0o m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng \u0111ang th\u1ef1c hi\u1ec7n nhi\u1ec7m v\u1ee5. Chi\u1ec1u r\u1ed9ng c\u1ee7a thanh th\u1ec3 hi\u1ec7n th\u1eddi l\u01b0\u1ee3ng ho\u1ea1t \u0111\u1ed9ng.<\/li>\n
    • H\u1ed9p tr\u1ea1ng th\u00e1i:<\/strong>C\u00e1c v\u00f9ng h\u00ecnh ch\u1eef nh\u1eadt cho bi\u1ebft tr\u1ea1ng th\u00e1i c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m c\u1ee5 th\u1ec3 (v\u00ed d\u1ee5 nh\u01b0 \u0110ang ho\u1ea1t \u0111\u1ed9ng<\/em>, Kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng<\/em>, \u0110ang ch\u1edd<\/em>).<\/li>\n
    • T\u00edn hi\u1ec7u:<\/strong> C\u00e1c m\u0169i t\u00ean ch\u1ec9 gi\u1eefa c\u00e1c \u0111\u01b0\u1eddng \u0111\u1eddi \u0111\u1ec3 bi\u1ec3u th\u1ecb c\u00e1c s\u1ef1 ki\u1ec7n ho\u1eb7c tin nh\u1eafn k\u00edch ho\u1ea1t thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i.<\/li>\n<\/ul>\n

      Quy tr\u00ecnh l\u00e0m vi\u1ec7c 30 ph\u00fat \u26a1<\/h2>\n

      Vi\u1ec7c t\u1ea1o ra m\u1ed9t s\u01a1 \u0111\u1ed3 h\u1eefu \u00edch kh\u00f4ng \u0111\u00f2i h\u1ecfi h\u00e0ng gi\u1edd l\u00ean k\u1ebf ho\u1ea1ch. M\u1ee5c ti\u00eau l\u00e0 ghi l\u1ea1i c\u00e1c \u0111\u01b0\u1eddng \u0111i quan tr\u1ecdng g\u00e2y ra nhi\u1ec1u kh\u00f3 kh\u0103n nh\u1ea5t trong h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n. Tu\u00e2n theo quy tr\u00ecnh c\u00f3 c\u1ea5u tr\u00fac n\u00e0y \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n ch\u00ednh x\u00e1c trong th\u1eddi gian ng\u1eafn.<\/p>\n

      Ph\u00fat 0-5: X\u00e1c \u0111\u1ecbnh ph\u1ea1m vi<\/h3>\n

      \u0110\u1eebng c\u1ed1 g\u1eafng v\u1ebd s\u01a1 \u0111\u1ed3 to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng. Ch\u1ecdn m\u1ed9t module c\u1ee5 th\u1ec3 n\u01a1i m\u00e0 t\u00ednh \u0111\u1ed3ng th\u1eddi \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn l\u00e0 g\u00e2y ra v\u1ea5n \u0111\u1ec1. C\u00e1c \u1ee9ng c\u1eed vi\u00ean ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n

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      • B\u1ed9 \u0111\u1ec7m k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/li>\n
      • C\u00e1c \u0111\u01b0\u1eddng d\u1eabn x\u1eed l\u00fd d\u1eef li\u1ec7u th\u1eddi gian th\u1ef1c<\/li>\n
      • X\u1eed l\u00fd ng\u1eaft trong c\u00e1c h\u1ec7 th\u1ed1ng nh\u00fang<\/li>\n
      • T\u1eadp h\u1ee3p c\u00e1c y\u00eau c\u1ea7u API b\u1ea5t \u0111\u1ed3ng b\u1ed9<\/li>\n<\/ul>\n

        Ghi l\u1ea1i c\u00e1c t\u00e1c nh\u00e2n ch\u00ednh tham gia. H\u1ea1n ch\u1ebf danh s\u00e1ch n\u00e0y ch\u1ec9 c\u00f2n ba ho\u1eb7c b\u1ed1n lu\u1ed3ng ho\u1eb7c ti\u1ebfn tr\u00ecnh kh\u00e1c nhau \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u01a1 \u0111\u1ed3 d\u1ec5 \u0111\u1ecdc.<\/p>\n

        Ph\u00fat 5-15: V\u1ebd ph\u00e1c c\u00e1c \u0111\u01b0\u1eddng \u0111\u1eddi<\/h3>\n

        V\u1ebd c\u00e1c \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u1ee9ng. \u0110\u00e1nh d\u1ea5u r\u00f5 r\u00e0ng t\u00ean c\u1ee7a c\u00e1c ti\u1ebfn tr\u00ecnh ho\u1eb7c \u0111\u1ed1i t\u01b0\u1ee3ng. \u0110\u1ea3m b\u1ea3o kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c \u0111\u01b0\u1eddng \u0111\u1ee7 r\u1ed9ng \u0111\u1ec3 ch\u1ee9a c\u00e1c thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i.<\/p>\n

        Ghi ch\u00fa th\u1eddi \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u v\u00e0 k\u1ebft th\u00fac cho t\u00ecnh hu\u1ed1ng b\u1ea1n \u0111ang ph\u00e2n t\u00edch. N\u1ebfu h\u1ec7 th\u1ed1ng ch\u1ea1y li\u00ean t\u1ee5c, h\u00e3y x\u00e1c \u0111\u1ecbnh m\u1ed9t khung th\u1eddi gian quan t\u00e2m (v\u00ed d\u1ee5: 10 gi\u00e2y \u0111\u1ea7u ti\u00ean ho\u1ea1t \u0111\u1ed9ng).<\/p>\n

        Ph\u00fat 15-25: V\u1ebd ho\u1ea1t \u0111\u1ed9ng<\/h3>\n

        \u0110\u00e2y l\u00e0 ph\u1ea7n c\u1ed1t l\u00f5i c\u1ee7a b\u00e0i t\u1eadp. \u0110\u1eb7t c\u00e1c thanh k\u00edch ho\u1ea1t tr\u00ean c\u00e1c \u0111\u01b0\u1eddng \u0111\u1eddi \u0111\u1ec3 th\u1ec3 hi\u1ec7n khi n\u00e0o m\u1ed7i ti\u1ebfn tr\u00ecnh \u0111ang b\u1eadn. H\u00e3y ch\u00ednh x\u00e1c v\u1ec1 th\u1eddi l\u01b0\u1ee3ng. N\u1ebfu m\u1ed9t ti\u1ebfn tr\u00ecnh m\u1ea5t 50ms v\u00e0 ti\u1ebfn tr\u00ecnh kh\u00e1c m\u1ea5t 200ms, h\u00e3y th\u1ec3 hi\u1ec7n t\u1ef7 l\u1ec7 n\u00e0y m\u1ed9t c\u00e1ch tr\u1ef1c quan.<\/p>\n

        V\u1ebd c\u00e1c chuy\u1ec3n ti\u1ebfp tr\u1ea1ng th\u00e1i. S\u1eed d\u1ee5ng c\u00e1c h\u1ed9p \u0111\u1ec3 th\u1ec3 hi\u1ec7n khi m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng \u0111ang ch\u1edd kh\u00f3a ho\u1eb7c \u0111ang th\u1ef1c hi\u1ec7n t\u00ednh to\u00e1n. Kho\u1ea3ng tr\u1ed1ng tr\u1ef1c quan n\u00e0y th\u01b0\u1eddng ti\u1ebft l\u1ed9 c\u00e1c \u0111i\u1ec3m ngh\u1ebdn.<\/p>\n

        Ph\u00fat 25-30: X\u00e1c \u0111\u1ecbnh c\u00e1c kho\u1ea3ng tr\u1ed1ng<\/h3>\n

        Xem x\u00e9t l\u1ea1i s\u01a1 \u0111\u1ed3, \u0111\u1eb7c bi\u1ec7t t\u00ecm c\u00e1c \u0111i\u1ec3m ch\u1ed3ng ch\u00e9o kh\u00f4ng n\u00ean t\u1ed3n t\u1ea1i ho\u1eb7c c\u00e1c kho\u1ea3ng tr\u1ed1ng ng\u1ee5 \u00fd tr\u1ea1ng th\u00e1i kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng. H\u00e3y t\u00ecm ki\u1ebfm:<\/p>\n

          \n
        • C\u00e1c \u0111\u01b0\u1eddng c\u1eaft nhau \u1edf n\u01a1i c\u00f3 kh\u1ea3 n\u0103ng x\u1ea3y ra xung \u0111\u1ed9t t\u00e0i nguy\u00ean.<\/li>\n
        • C\u00e1c t\u00ecnh hu\u1ed1ng ch\u1ebft m\u00e1y khi hai \u0111\u01b0\u1eddng ch\u1edd nhau v\u00f4 h\u1ea1n.<\/li>\n
        • C\u00e1c vi ph\u1ea1m v\u1ec1 th\u1eddi gian khi m\u1ed9t m\u1ed1c th\u1eddi gian b\u1ecb b\u1ecf l\u1ee1.<\/li>\n<\/ul>\n

          C\u00e1c m\u1eabu \u0111\u1ed3ng th\u1eddi ph\u1ed5 bi\u1ebfn \ud83e\udde9<\/h2>\n

          M\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 l\u1eb7p l\u1ea1i xu\u1ea5t hi\u1ec7n th\u01b0\u1eddng xuy\u00ean trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111\u1ed3ng th\u1eddi. Nh\u1eadn di\u1ec7n c\u00e1c m\u1eabu n\u00e0y trong s\u01a1 \u0111\u1ed3 th\u1eddi gian cho ph\u00e9p ch\u1ea9n \u0111o\u00e1n v\u00e0 kh\u1eafc ph\u1ee5c nhanh ch\u00f3ng.<\/p>\n

          1. \u0110i\u1ec1u ki\u1ec7n c\u1ea1nh tranh<\/h3>\n

          \u0110i\u1ec1u ki\u1ec7n c\u1ea1nh tranh x\u1ea3y ra khi k\u1ebft qu\u1ea3 ph\u1ee5 thu\u1ed9c v\u00e0o th\u1ee9 t\u1ef1 ho\u1eb7c th\u1eddi \u0111i\u1ec3m c\u1ee7a c\u00e1c s\u1ef1 ki\u1ec7n kh\u00f4ng th\u1ec3 ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c. Trong s\u01a1 \u0111\u1ed3, \u0111i\u1ec1u n\u00e0y tr\u00f4ng gi\u1ed1ng nh\u01b0 hai t\u00edn hi\u1ec7u \u0111\u1ebfn m\u1ed9t t\u00e0i nguy\u00ean chung g\u1ea7n nh\u01b0 c\u00f9ng l\u00fac, trong \u0111\u00f3 th\u1ee9 t\u1ef1 l\u00e0 kh\u00f4ng x\u00e1c \u0111\u1ecbnh.<\/p>\n

            \n
          • Ch\u1ec9 b\u00e1o h\u00ecnh \u1ea3nh:<\/strong>C\u00e1c thanh k\u00edch ho\u1ea1t ch\u1ed3ng ch\u00e9o nhau t\u1ea1i ch\u00ednh \u0111i\u1ec3m truy c\u1eadp t\u00e0i nguy\u00ean.<\/li>\n
          • Gi\u1ea3i ph\u00e1p:<\/strong>Gi\u1edbi thi\u1ec7u c\u00e1c \u0111i\u1ec3m \u0111\u1ed3ng b\u1ed9 h\u00f3a ho\u1eb7c kh\u00f3a mutex \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o th\u1ee9 t\u1ef1 nghi\u00eam ng\u1eb7t.<\/li>\n<\/ul>\n

            2. Ch\u1ebft ch\u1eafn<\/h3>\n

            Ch\u1ebft ch\u1eafn x\u1ea3y ra khi hai ho\u1eb7c nhi\u1ec1u ti\u1ebfn tr\u00ecnh \u0111ang ch\u1edd nhau gi\u1ea3i ph\u00f3ng t\u00e0i nguy\u00ean. Trong s\u01a1 \u0111\u1ed3 Th\u1eddi gian, \u0111i\u1ec1u n\u00e0y xu\u1ea5t hi\u1ec7n nh\u01b0 hai \u0111\u01b0\u1eddng s\u1ed1ng k\u00e9o d\u00e0i v\u00f4 h\u1ea1n v\u1ec1 t\u01b0\u01a1ng lai, c\u1ea3 hai \u0111\u1ec1u \u0111ang ch\u1edd t\u00edn hi\u1ec7u t\u1eeb nhau.<\/p>\n

              \n
            • Ch\u1ec9 b\u00e1o h\u00ecnh \u1ea3nh:<\/strong>Hai \u0111\u01b0\u1eddng song song kh\u00f4ng bao gi\u1edd \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft, c\u1ea3 hai \u0111\u1ec1u hi\u1ec3n th\u1ecb tr\u1ea1ng th\u00e1i\u0110ang ch\u1edd<\/em>tr\u1ea1ng th\u00e1i.<\/li>\n
            • Gi\u1ea3i ph\u00e1p:<\/strong>Th\u1ef1c hi\u1ec7n c\u01a1 ch\u1ebf th\u1eddi gian ch\u1edd ho\u1eb7c bu\u1ed9c th\u1ee9 t\u1ef1 kh\u00f3a theo c\u1ea5p b\u1eadc.<\/li>\n<\/ul>\n

              3. B\u1ecb b\u1ecf r\u01a1i<\/h3>\n

              B\u1ecb b\u1ecf r\u01a1i x\u1ea3y ra khi m\u1ed9t ti\u1ebfn tr\u00ecnh b\u1ecb t\u1eeb ch\u1ed1i m\u00e3i m\u00e3i c\u00e1c t\u00e0i nguy\u00ean c\u1ea7n thi\u1ebft. Tr\u00ean s\u01a1 \u0111\u1ed3, m\u1ed9t \u0111\u01b0\u1eddng s\u1ed1ng hi\u1ec3n th\u1ecb nhi\u1ec1u l\u1ea7n tr\u1ea1ng th\u00e1i\u0110ang ch\u1edd<\/em>tr\u1ea1ng th\u00e1i trong khi c\u00e1c ti\u1ebfn tr\u00ecnh kh\u00e1c ti\u1ebfp t\u1ee5c lu\u00e2n phi\u00ean qua c\u00e1c tr\u1ea1ng th\u00e1i ho\u1ea1t \u0111\u1ed9ng.<\/p>\n

                \n
              • Ch\u1ec9 b\u00e1o h\u00ecnh \u1ea3nh:<\/strong>M\u1ed9t \u0111\u01b0\u1eddng duy tr\u00ec t\u0129nh \u1edf ph\u00eda d\u01b0\u1edbi trong khi c\u00e1c \u0111\u01b0\u1eddng kh\u00e1c dao \u0111\u1ed9ng ph\u00eda tr\u00ean n\u00f3.<\/li>\n
              • Gi\u1ea3i ph\u00e1p:<\/strong>\u0110i\u1ec1u ch\u1ec9nh l\u1eadp l\u1ecbch \u01b0u ti\u00ean ho\u1eb7c gi\u1edbi thi\u1ec7u c\u00e1c h\u00e0ng \u0111\u1ee3i c\u00f4ng b\u1eb1ng.<\/li>\n<\/ul>\n

                4. Xung \u0111\u1ed9t t\u00e0i nguy\u00ean<\/h3>\n

                Nhi\u1ec1u ti\u1ebfn tr\u00ecnh c\u00f9ng c\u1ed1 g\u1eafng truy c\u1eadp m\u1ed9t t\u00e0i nguy\u00ean duy nh\u1ea5t (nh\u01b0 m\u1ed9t t\u1ec7p ho\u1eb7c kh\u1ed1i b\u1ed9 nh\u1edb) c\u00f9ng m\u1ed9t l\u00fac. \u0110i\u1ec1u n\u00e0y g\u00e2y ra \u0111\u1ed9 tr\u1ec5 trong h\u00e0ng \u0111\u1ee3i.<\/p>\n

                  \n
                • Ch\u1ec9 b\u00e1o h\u00ecnh \u1ea3nh:<\/strong>Nhi\u1ec1u thanh k\u00edch ho\u1ea1t h\u1ed9i t\u1ee5 t\u1ea1i m\u1ed9t \u0111i\u1ec3m th\u1eddi gian duy nh\u1ea5t tr\u00ean \u0111\u01b0\u1eddng s\u1ed1ng t\u00e0i nguy\u00ean.<\/li>\n
                • Gi\u1ea3i ph\u00e1p:<\/strong>T\u0103ng dung l\u01b0\u1ee3ng t\u00e0i nguy\u00ean ho\u1eb7c tu\u1ea7n t\u1ef1 h\u00f3a truy c\u1eadp.<\/li>\n<\/ul>\n

                  K\u00fd hi\u1ec7u v\u00e0 r\u00e0ng bu\u1ed9c n\u00e2ng cao \ud83d\udcd0<\/h2>\n

                  Sau khi c\u1ea5u tr\u00fac c\u01a1 b\u1ea3n \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp, b\u1ea1n c\u00f3 th\u1ec3 th\u00eam chi ti\u1ebft \u0111\u1ec3 t\u0103ng \u0111\u1ed9 ch\u00ednh x\u00e1c. S\u01a1 \u0111\u1ed3 Th\u1eddi gian h\u1ed7 tr\u1ee3 k\u00fd hi\u1ec7u c\u1ee5 th\u1ec3 cho c\u00e1c r\u00e0ng bu\u1ed9c v\u00e0 t\u00edn hi\u1ec7u nh\u1eb1m l\u00e0m r\u00f5 c\u00e1c h\u00e0nh vi ph\u1ee9c t\u1ea1p.<\/p>\n

                  R\u00e0ng bu\u1ed9c th\u1eddi gian<\/h3>\n

                  S\u1eed d\u1ee5ng nh\u00e3n v\u0103n b\u1ea3n \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c gi\u1edbi h\u1ea1n th\u1eddi gian c\u1ee5 th\u1ec3. V\u00ed d\u1ee5,[\u0111\u1ed9 tr\u1ec5 < 100ms]<\/code> ch\u1ec9 ra r\u1eb1ng ph\u1ea3n h\u1ed3i ph\u1ea3i x\u1ea3y ra trong v\u00f2ng 100 mili gi\u00e2y. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng th\u1eddi gian th\u1ef1c, n\u01a1i \u0111\u1ed9 tr\u1ec5 l\u00e0 m\u1ed9t y\u00eau c\u1ea7u ch\u1ee9c n\u0103ng.<\/p>\n

                  Lo\u1ea1i t\u00edn hi\u1ec7u<\/h3>\n
                    \n
                  • \u0110\u1ed3ng b\u1ed9:<\/strong> Ng\u01b0\u1eddi g\u1eedi ch\u1edd cho ng\u01b0\u1eddi nh\u1eadn x\u00e1c nh\u1eadn tin nh\u1eafn. V\u1ec1 m\u1eb7t tr\u1ef1c quan, thanh k\u00edch ho\u1ea1t c\u1ee7a ng\u01b0\u1eddi g\u1eedi ti\u1ebfp t\u1ee5c cho \u0111\u1ebfn khi thanh c\u1ee7a ng\u01b0\u1eddi nh\u1eadn b\u1eaft \u0111\u1ea7u.<\/li>\n
                  • B\u1ea5t \u0111\u1ed3ng b\u1ed9:<\/strong> Ng\u01b0\u1eddi g\u1eedi ti\u1ebfp t\u1ee5c ngay sau khi g\u1eedi. V\u1ec1 m\u1eb7t tr\u1ef1c quan, thanh c\u1ee7a ng\u01b0\u1eddi g\u1eedi kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o th\u1eddi gian c\u1ee7a ng\u01b0\u1eddi nh\u1eadn.<\/li>\n<\/ul>\n

                    C\u00e1c b\u1ea5t bi\u1ebfn tr\u1ea1ng th\u00e1i<\/h3>\n

                    B\u1ea1n c\u00f3 th\u1ec3 ghi ch\u00fa c\u00e1c h\u1ed9p tr\u1ea1ng th\u00e1i v\u1edbi c\u00e1c \u0111i\u1ec1u ki\u1ec7n ph\u1ea3i lu\u00f4n \u0111\u00fang. V\u00ed d\u1ee5, if (k\u00edch_th\u01b0\u1edbc_b\u1ed9_\u0111\u1ec7m > 0)<\/code>. \u0110i\u1ec1u n\u00e0y gi\u00fap x\u00e1c minh r\u1eb1ng t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c duy tr\u00ec trong su\u1ed1t kho\u1ea3ng th\u1eddi gian \u0111\u1ecbnh th\u1eddi.<\/p>\n

                    So s\u00e1nh: S\u01a1 \u0111\u1ed3 \u0111\u1ecbnh th\u1eddi so v\u1edbi s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 \ud83d\udcca<\/h2>\n

                    R\u1ea5t ph\u1ed5 bi\u1ebfn khi nh\u1ea7m l\u1eabn gi\u1eefa S\u01a1 \u0111\u1ed3 \u0111\u1ecbnh th\u1eddi v\u00e0 S\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1. C\u1ea3 hai \u0111\u1ec1u m\u00f4 h\u00ecnh h\u00f3a c\u00e1c t\u01b0\u01a1ng t\u00e1c, nh\u01b0ng ch\u00fang tr\u1ea3 l\u1eddi nh\u1eefng c\u00e2u h\u1ecfi kh\u00e1c nhau. Hi\u1ec3u \u0111\u01b0\u1ee3c khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng lo\u1ea1i n\u00e0o l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 t\u00e0i li\u1ec7u h\u00f3a hi\u1ec7u qu\u1ea3.<\/p>\n\n\n\n\n\n\n\n\n\n
                    T\u00ednh n\u0103ng<\/th>\nS\u01a1 \u0111\u1ed3 \u0111\u1ecbnh th\u1eddi<\/th>\nS\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1<\/th>\n<\/tr>\n<\/thead>\n
                    Tr\u1ecdng t\u00e2m ch\u00ednh<\/strong><\/td>\nTh\u1eddi gian v\u00e0 tr\u1ea1ng th\u00e1i<\/td>\nTh\u1ee9 t\u1ef1 tin nh\u1eafn<\/td>\n<\/tr>\n
                    Tr\u1ee5c<\/strong><\/td>\nTr\u1ee5c th\u1eddi gian ngang<\/td>\nC\u00e1c \u0111\u01b0\u1eddng s\u1ed1ng d\u1ecdc (th\u1eddi gian ng\u1ea7m hi\u1ec3u)<\/td>\n<\/tr>\n
                    \u0110\u1ed3ng th\u1eddi<\/strong><\/td>\nSong song r\u00f5 r\u00e0ng<\/td>\nSong song ng\u1ea7m \u0111\u1ecbnh<\/td>\n<\/tr>\n
                    T\u1ed1t nh\u1ea5t cho<\/strong><\/td>\nTh\u1eddi gian th\u1ef1c, h\u1ea1n ch\u00f3t, \u0111\u1ed3ng b\u1ed9 h\u00f3a<\/td>\nLu\u1ed3ng logic, c\u00e1c b\u01b0\u1edbc t\u01b0\u01a1ng t\u00e1c<\/td>\n<\/tr>\n
                    \u0110\u1ed9 ph\u1ee9c t\u1ea1p<\/strong><\/td>\nCao (chi ti\u1ebft \u0111\u1ecbnh th\u1eddi)<\/td>\nTrung b\u00ecnh (tr\u00ecnh t\u1ef1 tin nh\u1eafn)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                    C\u00e1c Th\u1ef1c Ti\u1ec5n T\u1ed1t Nh\u1ea5t cho B\u1ea3o Tr\u00ec \ud83d\udee1\ufe0f<\/h2>\n

                    Sau khi \u0111\u01b0\u1ee3c t\u1ea1o, m\u1ed9t s\u01a1 \u0111\u1ed3 th\u1eddi gian l\u00e0 m\u1ed9t t\u00e0i li\u1ec7u s\u1ed1ng. N\u00f3 c\u1ea7n \u0111\u01b0\u1ee3c b\u1ea3o tr\u00ec khi h\u1ec7 th\u1ed1ng ph\u00e1t tri\u1ec3n. Tu\u00e2n theo c\u00e1c h\u01b0\u1edbng d\u1eabn n\u00e0y \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00e0i li\u1ec7u \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt ch\u00ednh x\u00e1c v\u00e0 h\u1eefu \u00edch.<\/p>\n

                      \n
                    • Gi\u1eef cho n\u00f3 t\u1eadp trung:<\/strong> \u0110\u1eebng c\u1ed1 g\u1eafng m\u00f4 h\u00ecnh h\u00f3a t\u1eebng mili gi\u00e2y c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng ch\u1ea1y l\u00e2u. T\u1eadp trung v\u00e0o c\u00e1c \u0111\u01b0\u1eddng \u0111i quan tr\u1ecdng.<\/li>\n
                    • S\u1eed d\u1ee5ng k\u00fd hi\u1ec7u chu\u1ea9n:<\/strong> \u0110\u1ea3m b\u1ea3o t\u1ea5t c\u1ea3 c\u00e1c th\u00e0nh vi\u00ean trong nh\u00f3m hi\u1ec3u c\u00e1c k\u00fd hi\u1ec7u. Tr\u00e1nh s\u1eed d\u1ee5ng bi\u1ec3u t\u01b0\u1ee3ng t\u00f9y ch\u1ec9nh tr\u1eeb khi ch\u00fang \u0111\u01b0\u1ee3c t\u00e0i li\u1ec7u h\u00f3a.<\/li>\n
                    • Ki\u1ec3m so\u00e1t phi\u00ean b\u1ea3n:<\/strong> L\u01b0u s\u01a1 \u0111\u1ed3 c\u00f9ng v\u1edbi m\u00e3 ngu\u1ed3n. Khi logic thay \u0111\u1ed5i, c\u1eadp nh\u1eadt s\u01a1 \u0111\u1ed3 ngay l\u1eadp t\u1ee9c.<\/li>\n
                    • T\u1ef1 \u0111\u1ed9ng h\u00f3a \u1edf nh\u1eefng n\u01a1i c\u00f3 th\u1ec3:<\/strong> N\u1ebfu m\u00f4i tr\u01b0\u1eddng c\u1ee7a b\u1ea1n h\u1ed7 tr\u1ee3, h\u00e3y t\u1ea1o c\u00e1c b\u1ea3n xem th\u1eddi gian t\u1eeb nh\u1eadt k\u00fd ho\u1eb7c d\u1ea5u v\u1ebft \u0111\u1ec3 x\u00e1c minh m\u00f4 h\u00ecnh so v\u1edbi th\u1ef1c t\u1ebf.<\/li>\n
                    • Xem x\u00e9t th\u01b0\u1eddng xuy\u00ean:<\/strong> Bao g\u1ed3m s\u01a1 \u0111\u1ed3 th\u1eddi gian trong c\u00e1c cu\u1ed9c xem x\u00e9t ki\u1ebfn tr\u00fac. Vi\u1ec7c tr\u1ef1c quan h\u00f3a th\u1eddi gian th\u01b0\u1eddng ph\u00e1t hi\u1ec7n ra c\u00e1c v\u1ea5n \u0111\u1ec1 m\u00e0 m\u00f4 t\u1ea3 v\u0103n b\u1ea3n th\u01b0\u1eddng b\u1ecf s\u00f3t.<\/li>\n<\/ul>\n

                      G\u1ee1 l\u1ed7i b\u1eb1ng S\u01a1 \u0111\u1ed3 Th\u1eddi gian \ud83d\udd75\ufe0f<\/h2>\n

                      Khi x\u1ea3y ra s\u1ef1 c\u1ed1 s\u1ea3n xu\u1ea5t li\u00ean quan \u0111\u1ebfn th\u1eddi gian, m\u1ed9t s\u01a1 \u0111\u1ed3 \u0111\u00f3ng vai tr\u00f2 nh\u01b0 c\u00f4ng c\u1ee5 sinh gi\u1ea3 thuy\u1ebft. Thay v\u00ec \u0111o\u00e1n m\u00f2, b\u1ea1n c\u00f3 th\u1ec3 \u00e1nh x\u1ea1 nh\u1eadt k\u00fd th\u1ef1c t\u1ebf v\u00e0o s\u01a1 \u0111\u1ed3.<\/p>\n

                      Th\u1ef1c hi\u1ec7n theo tr\u00ecnh t\u1ef1 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 n\u00e0y:<\/p>\n

                        \n
                      1. \u00c1nh x\u1ea1 Nh\u1eadt k\u00fd v\u00e0o C\u00e1c D\u00f2ng Cu\u1ed9c S\u1ed1ng:<\/strong> G\u1eafn th\u1ebb c\u00e1c m\u1ee5c nh\u1eadt k\u00fd v\u1edbi ID ti\u1ebfn tr\u00ecnh c\u1ee5 th\u1ec3 \u0111\u1ec3 \u0111\u1ed3ng b\u1ed9 ch\u00fang v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u1ee9ng \u0111\u00fang.<\/li>\n
                      2. X\u00e1c \u0111\u1ecbnh C\u00e1c L\u1ec7ch L\u1ea1c:<\/strong> So s\u00e1nh c\u00e1c th\u1eddi \u0111i\u1ec3m th\u1ef1c t\u1ebf v\u1edbi c\u00e1c thanh k\u00edch ho\u1ea1t \u0111\u00e3 l\u00ean k\u1ebf ho\u1ea1ch. T\u00ecm ki\u1ebfm c\u00e1c \u0111\u1ed9 tr\u1ec5 kh\u00f4ng mong \u0111\u1ee3i.<\/li>\n
                      3. X\u00e1c \u0111\u1ecbnh \u0110i\u1ec3m D\u1eebng:<\/strong> T\u00ecm n\u01a1i s\u01a1 \u0111\u1ed3 kh\u00e1c bi\u1ec7t v\u1edbi d\u1eef li\u1ec7u nh\u1eadt k\u00fd. \u0110\u00e2y th\u01b0\u1eddng l\u00e0 n\u01a1i ch\u1ee9a l\u1ed7i \u0111\u1ed3ng th\u1eddi.<\/li>\n
                      4. M\u00f4 ph\u1ecfng S\u1eeda L\u1ed7i:<\/strong> V\u1ebd m\u1ed9t s\u01a1 \u0111\u1ed3 \u0111\u00e3 s\u1eeda \u0111\u1ed5i th\u1ec3 hi\u1ec7n c\u00e1ch s\u1eeda l\u1ed7i thay \u0111\u1ed5i th\u1eddi gian. N\u1ebfu s\u01a1 \u0111\u1ed3 m\u1edbi gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c s\u1ef1 ch\u1ed3ng ch\u00e9o, th\u00ec s\u1eeda l\u1ed7i n\u00e0y c\u00f3 kh\u1ea3 n\u0103ng l\u00e0 h\u1ee3p l\u00fd.<\/li>\n<\/ol>\n

                        Th\u00e1ch th\u1ee9c trong Vi\u1ec7c M\u00f4 H\u00ecnh H\u00f3a Th\u1eddi Gian \u23f3<\/h2>\n

                        Ngay c\u1ea3 v\u1edbi ph\u01b0\u01a1ng ph\u00e1p r\u00f5 r\u00e0ng, v\u1eabn t\u1ed3n t\u1ea1i nh\u1eefng th\u00e1ch th\u1ee9c. Th\u1eddi gian trong c\u00e1c h\u1ec7 th\u1ed1ng ph\u00e2n t\u00e1n kh\u00f4ng tuy\u1ec7t \u0111\u1ed1i. \u0110\u1ed3ng h\u1ed3 b\u1ecb l\u1ec7ch v\u00e0 \u0111\u1ed9 tr\u1ec5 m\u1ea1ng thay \u0111\u1ed5i. \u0110i\u1ec1u n\u00e0y t\u1ea1o ra s\u1ef1 kh\u00f4ng ch\u1eafc ch\u1eafn trong s\u01a1 \u0111\u1ed3.<\/p>\n

                        \u0110\u1ec3 x\u1eed l\u00fd \u0111i\u1ec1u n\u00e0y:<\/p>\n

                          \n
                        • S\u1eed d\u1ee5ng Th\u1eddi gian Logic:<\/strong> Thay v\u00ec d\u00f9ng th\u1eddi gian \u0111\u1ed3ng h\u1ed3 t\u01b0\u1eddng, h\u00e3y d\u00f9ng s\u1ed1 th\u1ee9 t\u1ef1 ho\u1eb7c \u0111\u1ed3ng h\u1ed3 logic \u0111\u1ec3 bi\u1ec3u di\u1ec5n th\u1ee9 t\u1ef1.<\/li>\n
                        • Th\u00eam D\u1ea3i An To\u00e0n:<\/strong> Khi m\u00f4 h\u00ecnh h\u00f3a c\u00e1c m\u1ed1c th\u1eddi gian, h\u00e3y bao g\u1ed3m m\u1ed9t kho\u1ea3ng an to\u00e0n \u0111\u1ec3 t\u00ednh \u0111\u1ebfn \u0111\u1ed9 tr\u1ec5 m\u1ea1ng.<\/li>\n
                        • Ghi ch\u00e9p c\u00e1c gi\u1ea3 \u0111\u1ecbnh:<\/strong>R\u00f5 r\u00e0ng n\u00eau b\u1eadt c\u00e1c \u0111i\u1ec1u ki\u1ec7n m\u1ea1ng v\u00e0 gi\u1edbi h\u1ea1n ph\u1ea7n c\u1ee9ng \u0111\u01b0\u1ee3c gi\u1ea3 \u0111\u1ecbnh trong s\u01a1 \u0111\u1ed3.<\/li>\n<\/ul>\n

                          Suy ngh\u0129 cu\u1ed1i c\u00f9ng v\u1ec1 vi\u1ec7c tr\u1ef1c quan h\u00f3a t\u00ednh \u0111\u1ed3ng th\u1eddi \ud83d\ude80<\/h2>\n

                          T\u00ednh \u0111\u1ed3ng th\u1eddi v\u1ed1n d\u0129 r\u1ea5t ph\u1ee9c t\u1ea1p. B\u1ed9 n\u00e3o con ng\u01b0\u1eddi kh\u00f4ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 theo d\u00f5i nhi\u1ec1u lu\u1ed3ng th\u1ef1c thi c\u00f9ng l\u00fac \u1edf m\u1ee9c tr\u1eebu t\u01b0\u1ee3ng. S\u01a1 \u0111\u1ed3 Th\u1eddi gian UML gi\u00fap l\u1ea5p \u0111\u1ea7y kho\u1ea3ng tr\u1ed1ng n\u00e0y b\u1eb1ng c\u00e1ch chuy\u1ec3n \u0111\u1ed5i logic th\u1eddi gian th\u00e0nh bi\u1ec3u di\u1ec5n kh\u00f4ng gian.<\/p>\n

                          B\u1eb1ng c\u00e1ch d\u00e0nh m\u1ed9t kho\u1ea3ng th\u1eddi gian ng\u1eafn \u0111\u1ec3 ph\u00e1c th\u1ea3o c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y, c\u00e1c \u0111\u1ed9i nh\u00f3m c\u00f3 th\u1ec3 ng\u0103n ng\u1eeba c\u00e1c t\u00ecnh hu\u1ed1ng c\u1ea1nh tranh t\u1ed1n k\u00e9m v\u00e0 l\u1ed7i \u0111\u1ed3ng b\u1ed9 h\u00f3a. Quy tr\u00ecnh n\u00e0y \u0111\u00f2i h\u1ecfi s\u1ef1 k\u1ef7 lu\u1eadt nh\u01b0ng mang l\u1ea1i hi\u1ec7u qu\u1ea3 cao v\u1ec1 \u0111\u1ed9 tin c\u1eady c\u1ee7a h\u1ec7 th\u1ed1ng. B\u1eaft \u0111\u1ea7u nh\u1ecf, t\u1eadp trung v\u00e0o c\u00e1c \u0111\u01b0\u1eddng \u0111i quan tr\u1ecdng, v\u00e0 \u0111\u1ec3 b\u1eb1ng ch\u1ee9ng tr\u1ef1c quan d\u1eabn d\u1eaft quy\u1ebft \u0111\u1ecbnh ki\u1ebfn tr\u00fac c\u1ee7a b\u1ea1n.<\/p>\n

                          Danh s\u00e1ch ki\u1ec3m tra \u0111\u1ec3 th\u00e0nh c\u00f4ng \u2705<\/h3>\n
                            \n
                          • [ ] \u0110\u00e3 x\u00e1c \u0111\u1ecbnh t\u00ecnh hu\u1ed1ng \u0111\u1ed3ng th\u1eddi c\u1ee5 th\u1ec3<\/li>\n
                          • [ ] \u0110\u00e3 x\u00e1c \u0111\u1ecbnh t\u1ea5t c\u1ea3 c\u00e1c lu\u1ed3ng\/qu\u00e1 tr\u00ecnh tham gia<\/li>\n
                          • [ ] \u0110\u00e3 v\u1ebd c\u00e1c \u0111\u01b0\u1eddng \u0111\u1eddi v\u1edbi kho\u1ea3ng c\u00e1ch h\u1ee3p l\u00fd<\/li>\n
                          • [ ] \u0110\u00e3 v\u1ebd c\u00e1c thanh k\u00edch ho\u1ea1t v\u1edbi th\u1eddi l\u01b0\u1ee3ng ch\u00ednh x\u00e1c<\/li>\n
                          • [ ] \u0110\u00e3 \u0111\u00e1nh d\u1ea5u r\u00f5 r\u00e0ng c\u00e1c chuy\u1ec3n \u0111\u1ed5i tr\u1ea1ng th\u00e1i<\/li>\n
                          • [ ] \u0110\u00e3 th\u00eam c\u00e1c r\u00e0ng bu\u1ed9c th\u1eddi gian v\u00e0 m\u1ed1c th\u1eddi gian<\/li>\n
                          • [ ] \u0110\u00e3 ki\u1ec3m tra c\u00e1c ch\u1ed3ng ch\u00e9o v\u00e0 k\u1eb9t v\u00f2ng<\/li>\n
                          • [ ] \u0110\u00e3 l\u01b0u s\u01a1 \u0111\u1ed3 v\u00e0o kho l\u01b0u tr\u1eef ki\u1ebfn tr\u00fac<\/li>\n<\/ul>\n

                            V\u1edbi khung n\u00e0y, b\u1ea1n c\u00f3 c\u00e1c c\u00f4ng c\u1ee5 \u0111\u1ec3 tr\u1ef1c quan h\u00f3a v\u00e0 gi\u1ea3i quy\u1ebft hi\u1ec7u qu\u1ea3 c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 th\u1eddi gian. Con \u0111\u01b0\u1eddng d\u1eabn \u0111\u1ebfn m\u1ed9t h\u1ec7 th\u1ed1ng \u0111\u1ed3ng th\u1eddi \u1ed5n \u0111\u1ecbnh b\u1eaft \u0111\u1ea7u t\u1eeb m\u1ed9t c\u00e1i nh\u00ecn r\u00f5 r\u00e0ng v\u1ec1 th\u1eddi gian.<\/p>\n","protected":false},"excerpt":{"rendered":"

                            \u0110\u1ed3ng th\u1eddi l\u00e0 m\u1ed9t trong nh\u1eefng th\u00e1ch th\u1ee9c dai d\u1eb3ng nh\u1ea5t trong thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng. C\u00e1c lu\u1ed3ng, ti\u1ebfn tr\u00ecnh v\u00e0 s\u1ef1 ki\u1ec7n b\u1ea5t \u0111\u1ed3ng b\u1ed9 th\u01b0\u1eddng va ch\u1ea1m theo…<\/p>\n","protected":false},"author":1,"featured_media":593,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"S\u01a1 \u0111\u1ed3 Th\u1eddi gian UML: Tr\u1ef1c quan h\u00f3a c\u00e1c v\u1ea5n \u0111\u1ec1 \u0111\u1ed3ng th\u1eddi nhanh ch\u00f3ng","_yoast_wpseo_metadesc":"H\u1ecdc c\u00e1ch s\u1eed d\u1ee5ng S\u01a1 \u0111\u1ed3 Th\u1eddi gian UML \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c v\u1ea5n \u0111\u1ec1 \u0111\u1ed3ng th\u1eddi trong v\u00f2ng 30 ph\u00fat. M\u1ed9t h\u01b0\u1edbng d\u1eabn th\u1ef1c t\u1ebf cho c\u00e1c ki\u1ebfn tr\u00fac s\u01b0 h\u1ec7 th\u1ed1ng v\u00e0 nh\u00e0 ph\u00e1t tri\u1ec3n v\u1ec1 vi\u1ec7c tr\u1ef1c quan h\u00f3a c\u00e1c r\u00e0ng bu\u1ed9c th\u1eddi gian.","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[13],"tags":[39,43],"class_list":["post-592","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unified-modeling-language","tag-academic","tag-timing-diagram"],"yoast_head":"\nS\u01a1 \u0111\u1ed3 Th\u1eddi gian UML: Tr\u1ef1c quan h\u00f3a c\u00e1c v\u1ea5n \u0111\u1ec1 \u0111\u1ed3ng th\u1eddi nhanh ch\u00f3ng<\/title>\n<meta name=\"description\" content=\"H\u1ecdc c\u00e1ch s\u1eed d\u1ee5ng S\u01a1 \u0111\u1ed3 Th\u1eddi gian UML \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c v\u1ea5n \u0111\u1ec1 \u0111\u1ed3ng th\u1eddi trong v\u00f2ng 30 ph\u00fat. 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