{"id":614,"date":"2026-04-02T14:13:19","date_gmt":"2026-04-02T14:13:19","guid":{"rendered":"https:\/\/www.viz-tools.com\/vi\/uml-timing-diagram-quick-start-model-delays\/"},"modified":"2026-04-02T14:13:19","modified_gmt":"2026-04-02T14:13:19","slug":"uml-timing-diagram-quick-start-model-delays","status":"publish","type":"post","link":"https:\/\/www.viz-tools.com\/vi\/uml-timing-diagram-quick-start-model-delays\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn nhanh s\u01a1 \u0111\u1ed3 Th\u1eddi gian UML: L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 m\u00f4 h\u00ecnh h\u00f3a \u0111\u1ed9 tr\u1ec5 tin nh\u1eafn v\u00e0 th\u1eddi gian x\u1eed l\u00fd m\u1ed9t c\u00e1ch nhanh ch\u00f3ng"},"content":{"rendered":"

Trong c\u00e1c ki\u1ebfn tr\u00fac ph\u1ea7n m\u1ec1m ph\u1ee9c t\u1ea1p, vi\u1ec7c hi\u1ec3u r\u00f5khi n\u00e0o<\/em>c\u00e1c s\u1ef1 ki\u1ec7n x\u1ea3y ra l\u00e0 \u0111i\u1ec1u kh\u00f4ng k\u00e9m ph\u1ea7n quan tr\u1ecdng so v\u1edbi vi\u1ec7c bi\u1ebftg\u00ec<\/em>x\u1ea3y ra. Trong khi s\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 m\u00f4 ph\u1ecfng c\u00e1c t\u01b0\u01a1ng t\u00e1c, ch\u00fang th\u01b0\u1eddng thi\u1ebfu \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ea7n thi\u1ebft \u0111\u1ec3 ph\u00e2n t\u00edch h\u00e0nh vi theo th\u1eddi gian. \u0110\u00e2y ch\u00ednh l\u00e0 l\u00fac s\u01a1 \u0111\u1ed3 Th\u1eddi gian UML tr\u1edf n\u00ean thi\u1ebft y\u1ebfu. N\u00f3 cung c\u1ea5p m\u1ed9t c\u00e1ch th\u1ee9c nghi\u00eam ng\u1eb7t \u0111\u1ec3 tr\u1ef1c quan h\u00f3a c\u00e1c thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i v\u00e0 lu\u1ed3ng tin nh\u1eafn trong m\u1ed9t khung th\u1eddi gian c\u1ee5 th\u1ec3.<\/p>\n

D\u00f9 b\u1ea1n \u0111ang thi\u1ebft k\u1ebf c\u00e1c h\u1ec7 th\u1ed1ng nh\u00fang, ph\u00e2n t\u00edch giao th\u1ee9c m\u1ea1ng hay g\u1ee1 l\u1ed7i c\u00e1c \u0111i\u1ec1u ki\u1ec7n c\u1ea1nh tranh, vi\u1ec7c th\u00e0nh th\u1ea1o s\u01a1 \u0111\u1ed3 th\u1eddi gian gi\u00fap b\u1ea1n d\u1ef1 \u0111o\u00e1n c\u00e1c \u0111i\u1ec3m ngh\u1ebdn v\u00e0 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a h\u1ec7 th\u1ed1ng. H\u01b0\u1edbng d\u1eabn n\u00e0y kh\u00e1m ph\u00e1 c\u00e1c c\u01a1 ch\u1ebf m\u00f4 h\u00ecnh h\u00f3a \u0111\u1ed9 tr\u1ec5 tin nh\u1eafn v\u00e0 th\u1eddi gian x\u1eed l\u00fd m\u1ed9t c\u00e1ch c\u00f3 uy t\u00edn v\u00e0 ch\u00ednh x\u00e1c.<\/p>\n

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\"Chibi-style<\/figure>\n<\/div>\n

T\u1ea1i sao s\u01a1 \u0111\u1ed3 th\u1eddi gian l\u1ea1i quan tr\u1ecdng trong thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng \ud83e\udde0<\/h2>\n

C\u00e1c s\u01a1 \u0111\u1ed3 t\u01b0\u01a1ng t\u00e1c ti\u00eau chu\u1ea9n t\u1eadp trung v\u00e0o th\u1ee9 t\u1ef1 logic c\u1ee7a c\u00e1c s\u1ef1 ki\u1ec7n. Ch\u00fang k\u1ec3 m\u1ed9t c\u00e2u chuy\u1ec7n v\u1ec1 nguy\u00ean nh\u00e2n v\u00e0 h\u1ec7 qu\u1ea3. Tuy nhi\u00ean, ch\u00fang hi\u1ebfm khi \u0111\u1ecbnh l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c kho\u1ea3ng th\u1eddi gian gi\u1eefa c\u00e1c s\u1ef1 ki\u1ec7n \u0111\u00f3. Trong c\u00e1c h\u1ec7 th\u1ed1ng th\u1eddi gian th\u1ef1c, t\u1eebng mili gi\u00e2y \u0111\u1ec1u quan tr\u1ecdng. M\u1ed9t \u0111\u1ed9 tr\u1ec5 trong b\u1ed9 x\u1eed l\u00fd giao d\u1ecbch t\u00e0i ch\u00ednh hay m\u1ed9t \u0111\u1ec9nh \u0111\u1ed9 tr\u1ec5 trong giao th\u1ee9c ph\u00e1t tr\u1ef1c tuy\u1ebfn video c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn th\u1ea5t b\u1ea1i.<\/p>\n

S\u01a1 \u0111\u1ed3 Th\u1eddi gian UML cung c\u1ea5p m\u1ed9t g\u00f3c nh\u00ecn c\u1ee5 th\u1ec3 cho ph\u00e2n t\u00edch n\u00e0y. N\u00f3 t\u1eadp trung v\u00e0o c\u00e1c kh\u00eda c\u1ea1nh theo th\u1eddi gian c\u1ee7a h\u00e0nh vi \u0111\u1ed1i t\u01b0\u1ee3ng. N\u00f3 \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch cho:<\/p>\n

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  • H\u1ec7 th\u1ed1ng th\u1eddi gian th\u1ef1c:<\/strong>\u0110\u1ea3m b\u1ea3o c\u00e1c m\u1ed1c th\u1eddi gian \u0111\u01b0\u1ee3c \u0111\u00e1p \u1ee9ng trong c\u00e1c v\u00f2ng \u0111i\u1ec1u khi\u1ec3n.<\/li>\n
  • Ph\u00e2n t\u00edch hi\u1ec7u su\u1ea5t:<\/strong>X\u00e1c \u0111\u1ecbnh n\u01a1i th\u1eddi gian x\u1eed l\u00fd ti\u00eau t\u1ed1n t\u00e0i nguy\u00ean.<\/li>\n
  • \u0110\u1ed3ng th\u1eddi:<\/strong>Tr\u1ef1c quan h\u00f3a c\u00e1c thao t\u00e1c ch\u1ed3ng ch\u00e9o tr\u00ean c\u00e1c lu\u1ed3ng ho\u1eb7c ti\u1ebfn tr\u00ecnh kh\u00e1c nhau.<\/li>\n
  • \u0110\u1ed9 tr\u1ec5 m\u1ea1ng:<\/strong>B\u1ea3n \u0111\u1ed3 h\u00f3a th\u1eddi gian c\u1ea7n thi\u1ebft \u0111\u1ec3 d\u1eef li\u1ec7u \u0111i qua m\u1ea1ng.<\/li>\n<\/ul>\n

    B\u1eb1ng c\u00e1ch chuy\u1ec3n tr\u1ecdng t\u00e2m t\u1eeb th\u1ee9 t\u1ef1 sang th\u1eddi gian, b\u1ea1n c\u00f3 kh\u1ea3 n\u0103ng ph\u00e1t hi\u1ec7n nh\u1eefng b\u1ea5t hi\u1ec7u qu\u1ea3 m\u00e0 s\u01a1 \u0111\u1ed3 lu\u1ed3ng th\u00f4ng th\u01b0\u1eddng che gi\u1ea5u. B\u1ea1n chuy\u1ec3n t\u1eeb vi\u1ec7c h\u1ecfi ‘N\u00f3 \u0111\u00e3 x\u1ea3y ra ch\u01b0a?’ sang h\u1ecfi ‘N\u00f3 \u0111\u00e3 x\u1ea3y ra \u0111\u00fang th\u1eddi gian ch\u01b0a?’<\/p>\n

    C\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a s\u01a1 \u0111\u1ed3 th\u1eddi gian \ud83d\udd0d<\/h2>\n

    Tr\u01b0\u1edbc khi m\u00f4 h\u00ecnh h\u00f3a \u0111\u1ed9 tr\u1ec5, b\u1ea1n ph\u1ea3i hi\u1ec3u ng\u1eef ph\u00e1p. Ng\u00f4n ng\u1eef tr\u1ef1c quan c\u1ee7a s\u01a1 \u0111\u1ed3 th\u1eddi gian kh\u00e1c bi\u1ec7t v\u1edbi c\u00e1c k\u00fd hi\u1ec7u UML kh\u00e1c. N\u00f3 ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o tr\u1ee5c th\u1eddi gian ngang v\u00e0 c\u00e1c bi\u1ec3u di\u1ec5n tr\u1ea1ng th\u00e1i d\u1ecdc.<\/p>\n

    Tr\u1ee5c th\u1eddi gian<\/h3>\n

    Tr\u1ee5c ngang \u0111\u1ea1i di\u1ec7n cho s\u1ef1 tr\u00f4i ch\u1ea3y c\u1ee7a th\u1eddi gian. Kh\u00e1c v\u1edbi s\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1, n\u01a1i kho\u1ea3ng c\u00e1ch d\u1ecdc th\u1ec3 hi\u1ec7n th\u1ee9 t\u1ef1 logic, \u1edf \u0111\u00e2y kho\u1ea3ng c\u00e1ch ngang th\u1ec3 hi\u1ec7n \u0111\u1ed9 d\u00e0i th\u1eddi gian.<\/p>\n

      \n
    • Thang \u0111o tuy\u1ebfn t\u00ednh:<\/strong>H\u1ea7u h\u1ebft c\u00e1c s\u01a1 \u0111\u1ed3 \u0111\u1ec1u gi\u1ea3 \u0111\u1ecbnh s\u1ef1 ti\u1ebfn tri\u1ec3n tuy\u1ebfn t\u00ednh c\u1ee7a th\u1eddi gian (1 gi\u00e2y = 1 \u0111\u01a1n v\u1ecb).<\/li>\n
    • Thang \u0111o phi tuy\u1ebfn t\u00ednh:<\/strong>Trong m\u1ed9t s\u1ed1 quan \u0111i\u1ec3m ki\u1ebfn tr\u00fac c\u1ea5p cao, b\u1ea1n c\u00f3 th\u1ec3 b\u1ecf qua c\u00e1c giai \u0111o\u1ea1n ch\u1edd \u0111\u1ec3 t\u1eadp trung v\u00e0o c\u00e1c \u0111\u1ee3t ho\u1ea1t \u0111\u1ed9ng t\u00edch c\u1ef1c.<\/li>\n<\/ul>\n

      C\u00e1c \u0111\u01b0\u1eddng s\u1ed1ng<\/h3>\n

      C\u00e1c \u0111\u01b0\u1eddng s\u1ed1ng \u0111\u1ea1i di\u1ec7n cho c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng, l\u1edbp ho\u1eb7c ti\u1ebfn tr\u00ecnh. Trong s\u01a1 \u0111\u1ed3 th\u1eddi gian, ch\u00fang th\u01b0\u1eddng l\u00e0 c\u00e1c \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u1ee9ng k\u00e9o d\u00e0i t\u1eeb tr\u00ean xu\u1ed1ng d\u01b0\u1edbi.<\/p>\n

        \n
      • \u0110\u1ecbnh danh \u0111\u1ed1i t\u01b0\u1ee3ng:<\/strong> M\u1ed7i \u0111\u01b0\u1eddng s\u1ed1ng t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ed9t th\u1ef1c th\u1ec3 c\u1ee5 th\u1ec3 trong h\u1ec7 th\u1ed1ng.<\/li>\n
      • Theo d\u00f5i tr\u1ea1ng th\u00e1i:<\/strong>B\u1ea1n theo d\u00f5i tr\u1ea1ng th\u00e1i c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng n\u00e0y d\u1ecdc theo tr\u1ee5c th\u1eddi gian ngang.<\/li>\n<\/ul>\n

        S\u1ef1 thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i v\u00e0 \u0111i\u1ec1u ki\u1ec7n<\/h3>\n

        D\u1eef li\u1ec7u ch\u00ednh trong s\u01a1 \u0111\u1ed3 th\u1eddi gian l\u00e0 tr\u1ea1ng th\u00e1i c\u1ee7a \u0111\u01b0\u1eddng s\u1ed1ng. \u0110i\u1ec1u n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng c\u00e1c h\u00ecnh ch\u1eef nh\u1eadt ho\u1eb7c nh\u00e3n v\u0103n b\u1ea3n \u0111\u01b0\u1ee3c \u0111\u1eb7t d\u1ecdc theo tr\u1ee5c th\u1eddi gian.<\/p>\n

          \n
        • Tr\u1ea1ng th\u00e1i Cao\/Th\u1ea5p:<\/strong>Th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ch\u1ec9 tr\u1ea1ng th\u00e1i ho\u1ea1t \u0111\u1ed9ng so v\u1edbi tr\u1ea1ng th\u00e1i kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng.<\/li>\n
        • Kho\u1ea3ng gi\u00e1 tr\u1ecb:<\/strong>Trong lu\u1ed3ng d\u1eef li\u1ec7u, b\u1ea1n c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecb m\u1ed9t gi\u00e1 tr\u1ecb thay \u0111\u1ed5i t\u1eeb 0 \u0111\u1ebfn 100 theo th\u1eddi gian.<\/li>\n
        • \u0110i\u1ec1u ki\u1ec7n:<\/strong>Tr\u1ea1ng th\u00e1i logic (\u0110\u00fang\/Sai) cho bi\u1ebft quy\u1ec1n truy c\u1eadp ho\u1eb7c tr\u1ea1ng th\u00e1i kh\u00f3a.<\/li>\n<\/ul>\n\n\n\n\n\n\n\n\n\n
          Y\u1ebfu t\u1ed1<\/th>\nM\u1ee5c \u0111\u00edch<\/th>\nBi\u1ec3u di\u1ec5n tr\u1ef1c quan<\/th>\n<\/tr>\n<\/thead>\n
          \u0110\u01b0\u1eddng s\u1ed1ng<\/td>\nBi\u1ec3u di\u1ec5n m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng ho\u1eb7c qu\u00e1 tr\u00ecnh<\/td>\n\u0110\u01b0\u1eddng th\u1eb3ng \u0111\u1ee9ng<\/td>\n<\/tr>\n
          Thanh k\u00edch ho\u1ea1t<\/td>\nCh\u1ec9 ra vi\u1ec7c th\u1ef1c thi \u0111ang ho\u1ea1t \u0111\u1ed9ng<\/td>\nH\u00ecnh ch\u1eef nh\u1eadt tr\u00ean \u0111\u01b0\u1eddng s\u1ed1ng<\/td>\n<\/tr>\n
          Tr\u1ee5c th\u1eddi gian<\/td>\n\u0110o l\u01b0\u1eddng th\u1eddi l\u01b0\u1ee3ng<\/td>\n\u0110\u01b0\u1eddng th\u1eb3ng ngang<\/td>\n<\/tr>\n
          M\u0169i t\u00ean tin nh\u1eafn<\/td>\nHi\u1ec3n th\u1ecb s\u1ef1 giao ti\u1ebfp<\/td>\nM\u0169i t\u00ean gi\u1eefa c\u00e1c \u0111\u01b0\u1eddng s\u1ed1ng<\/td>\n<\/tr>\n
          Thanh \u0111\u1ed9 tr\u1ec5<\/td>\nHi\u1ec3n th\u1ecb th\u1eddi gian ch\u1edd<\/td>\nThanh ngang<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          M\u00f4 h\u00ecnh h\u00f3a \u0111\u1ed9 tr\u1ec5 tin nh\u1eafn \u23f3<\/h2>\n

          M\u1ed9t trong nh\u1eefng kh\u00eda c\u1ea1nh quan tr\u1ecdng nh\u1ea5t c\u1ee7a ph\u00e2n t\u00edch th\u1eddi gian l\u00e0 hi\u1ec3u r\u00f5 kho\u1ea3ng c\u00e1ch gi\u1eefa m\u1ed9t y\u00eau c\u1ea7u v\u00e0 ph\u1ea3n h\u1ed3i. \u0110\u00e2y ch\u00ednh l\u00e0 \u0111\u1ed9 tr\u1ec5 tin nh\u1eafn. N\u00f3 bao g\u1ed3m \u0111\u1ed9 tr\u1ec5 m\u1ea1ng, th\u1eddi gian ch\u1edd h\u00e0ng \u0111\u1ee3i v\u00e0 chi ph\u00ed x\u1eed l\u00fd.<\/p>\n

          \u0110\u1ed9 tr\u1ec5 c\u1ed1 \u0111\u1ecbnh so v\u1edbi \u0111\u1ed9 tr\u1ec5 bi\u1ebfn \u0111\u1ed5i<\/h3>\n

          Kh\u00f4ng ph\u1ea3i m\u1ecdi \u0111\u1ed9 tr\u1ec5 n\u00e0o c\u0169ng gi\u1ed1ng nhau. Trong m\u00f4 h\u00ecnh c\u1ee7a b\u1ea1n, b\u1ea1n ph\u1ea3i ph\u00e2n bi\u1ec7t gi\u1eefa c\u00e1c kho\u1ea3ng c\u00e1ch c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c v\u00e0 kh\u00f4ng th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c.<\/p>\n

            \n
          • \u0110\u1ed9 tr\u1ec5 c\u1ed1 \u0111\u1ecbnh:<\/strong> \u0110\u00e2y l\u00e0 c\u00e1c h\u1eb1ng s\u1ed1. V\u00ed d\u1ee5, m\u1ed9t thao t\u00e1c thi\u1ebft l\u1eadp giao th\u1ee9c c\u00f3 th\u1ec3 lu\u00f4n m\u1ea5t 50 mili gi\u00e2y. Trong s\u01a1 \u0111\u1ed3, \u0111i\u1ec1u n\u00e0y \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n b\u1eb1ng m\u1ed9t thanh ngang th\u1eb3ng ho\u1eb7c m\u1ed9t kho\u1ea3ng c\u00e1ch c\u1ee5 th\u1ec3 gi\u1eefa c\u00e1c m\u0169i t\u00ean.<\/li>\n
          • \u0110\u1ed9 tr\u1ec5 bi\u1ebfn \u0111\u1ed5i:<\/strong> Ch\u00fang thay \u0111\u1ed5i t\u00f9y theo t\u1ea3i. V\u00ed d\u1ee5, m\u1ed9t truy v\u1ea5n c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u00f3 th\u1ec3 m\u1ea5t 10ms \u1edf t\u1ea3i th\u1ea5p nh\u01b0ng l\u00ean t\u1edbi 500ms \u1edf t\u1ea3i cao. B\u1ea1n c\u00f3 th\u1ec3 bi\u1ec3u di\u1ec5n \u0111i\u1ec1u n\u00e0y b\u1eb1ng c\u00e1ch ghi r\u00f5 m\u1ed9t kho\u1ea3ng (v\u00ed d\u1ee5: 10-500ms) ho\u1eb7c b\u1eb1ng c\u00e1ch v\u1ebd nhi\u1ec1u t\u00ecnh hu\u1ed1ng kh\u00e1c nhau.<\/li>\n<\/ul>\n

            Bi\u1ec3u di\u1ec5n \u0111\u1ed9 tr\u1ec5<\/h3>\n

            \u0110\u1ed9 tr\u1ec5 l\u00e0 th\u1eddi gian c\u1ea7n thi\u1ebft \u0111\u1ec3 m\u1ed9t t\u00edn hi\u1ec7u di chuy\u1ec3n t\u1eeb ngu\u1ed3n \u0111\u1ebfn \u0111\u00edch. Khi m\u00f4 h\u00ecnh h\u00f3a \u0111i\u1ec1u n\u00e0y:<\/p>\n

              \n
            • V\u1ebd s\u1ef1 ki\u1ec7n g\u1eedi:<\/strong> Ghi ch\u00fa \u0111i\u1ec3m ch\u00ednh x\u00e1c n\u01a1i tin nh\u1eafn r\u1eddi kh\u1ecfi ng\u01b0\u1eddi g\u1eedi.<\/li>\n
            • V\u1ebd s\u1ef1 ki\u1ec7n nh\u1eadn:<\/strong> Ghi ch\u00fa \u0111i\u1ec3m ch\u00ednh x\u00e1c n\u01a1i tin nh\u1eafn \u0111\u1ebfn \u0111\u00edch t\u1ea1i ng\u01b0\u1eddi nh\u1eadn.<\/li>\n
            • Kho\u1ea3ng c\u00e1ch tr\u1ef1c quan:<\/strong> Kho\u1ea3ng c\u00e1ch gi\u1eefa hai \u0111i\u1ec3m n\u00e0y tr\u00ean tr\u1ee5c ngang \u0111\u1ea1i di\u1ec7n cho \u0111\u1ed9 tr\u1ec5.<\/li>\n<\/ul>\n

              N\u1ebfu b\u1ea1n \u0111ang m\u00f4 h\u00ecnh h\u00f3a m\u1ed9t h\u1ec7 th\u1ed1ng ph\u00e2n t\u00e1n, b\u1ea1n c\u00f3 th\u1ec3 c\u00f3 nhi\u1ec1u \u0111\u01b0\u1eddng th\u1eddi gian \u0111\u1ea1i di\u1ec7n cho c\u00e1c m\u00e1y ch\u1ee7 kh\u00e1c nhau. \u0110\u1ed9 tr\u1ec5 gi\u1eefa M\u00e1y ch\u1ee7 A v\u00e0 M\u00e1y ch\u1ee7 B c\u1ea7n ph\u1ea3i kh\u00e1c bi\u1ec7t v\u1edbi \u0111\u1ed9 tr\u1ec5 gi\u1eefa M\u00e1y ch\u1ee7 B v\u00e0 Kh\u00e1ch h\u00e0ng.<\/p>\n

              Th\u1eddi gian ch\u1edd v\u01b0\u1ee3t gi\u1edbi h\u1ea1n v\u00e0 th\u1eddi gian ch\u1edd v\u01b0\u1ee3t gi\u1edbi h\u1ea1n<\/h3>\n

              C\u00e1c h\u1ec7 th\u1ed1ng th\u01b0\u1eddng c\u00f3 c\u01a1 ch\u1ebf t\u00edch h\u1ee3p \u0111\u1ec3 x\u1eed l\u00fd \u0111\u1ed9 tr\u1ec5 qu\u00e1 m\u1ee9c. M\u1ed9t th\u1eddi gian ch\u1edd v\u01b0\u1ee3t gi\u1edbi h\u1ea1n l\u00e0 ng\u01b0\u1ee1ng th\u1eddi gian c\u1ee5 th\u1ec3, sau \u0111\u00f3 h\u00e0nh \u0111\u1ed9ng s\u1ebd b\u1ecb h\u1ee7y b\u1ecf.<\/p>\n

                \n
              • \u0110\u01b0\u1eddng ng\u01b0\u1ee1ng:<\/strong> B\u1ea1n c\u00f3 th\u1ec3 v\u1ebd m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u1ee9ng \u0111\u1ec3 ch\u1ec9 th\u1eddi gian ch\u1edd t\u1ed1i \u0111a \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn.<\/li>\n
              • Chuy\u1ec3n \u0111\u1ed5i tr\u1ea1ng th\u00e1i:<\/strong> N\u1ebfu tin nh\u1eafn kh\u00f4ng \u0111\u1ebfn tr\u01b0\u1edbc \u0111\u01b0\u1eddng n\u00e0y, tr\u1ea1ng th\u00e1i s\u1ebd chuy\u1ec3n sang \u201cH\u1ebft th\u1eddi gian ch\u1edd\u201d ho\u1eb7c \u201cL\u1ed7i\u201d.<\/li>\n<\/ul>\n

                Bi\u1ec3u di\u1ec5n th\u1eddi gian x\u1eed l\u00fd \u2699\ufe0f<\/h2>\n

                M\u1ed9t khi tin nh\u1eafn \u0111\u1ebfn, h\u1ec7 th\u1ed1ng ph\u1ea3i th\u1ef1c hi\u1ec7n c\u00f4ng vi\u1ec7c. \u0110\u00e2y ch\u00ednh l\u00e0 th\u1eddi gian x\u1eed l\u00fd. N\u00f3 kh\u00e1c bi\u1ec7t v\u1edbi \u0111\u1ed9 tr\u1ec5, v\u00ec n\u00f3 x\u1ea3y ra ho\u00e0n to\u00e0n b\u00ean trong \u0111\u1ed1i t\u01b0\u1ee3ng nh\u1eadn.<\/p>\n

                Thanh k\u00edch ho\u1ea1t<\/h3>\n

                C\u00e1ch ch\u00ednh \u0111\u1ec3 th\u1ec3 hi\u1ec7n th\u1eddi gian x\u1eed l\u00fd l\u00e0 thanh k\u00edch ho\u1ea1t. \u0110\u00e2y l\u00e0 m\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt \u0111\u01b0\u1ee3c v\u1ebd tr\u1ef1c ti\u1ebfp tr\u00ean \u0111\u01b0\u1eddng th\u1eddi gian c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng th\u1ef1c hi\u1ec7n c\u00f4ng vi\u1ec7c.<\/p>\n

                  \n
                • \u0110i\u1ec3m b\u1eaft \u0111\u1ea7u:<\/strong> C\u1ea1nh b\u00ean tr\u00e1i c\u1ee7a thanh \u0111\u01b0\u1ee3c c\u0103n ch\u1ec9nh v\u1edbi th\u1eddi \u0111i\u1ec3m tin nh\u1eafn \u0111\u1ebfn.<\/li>\n
                • \u0110i\u1ec3m k\u1ebft th\u00fac:<\/strong> C\u1ea1nh b\u00ean ph\u1ea3i \u0111\u01b0\u1ee3c c\u0103n ch\u1ec9nh v\u1edbi th\u1eddi \u0111i\u1ec3m g\u1eedi ph\u1ea3n h\u1ed3i.<\/li>\n
                • Th\u1eddi l\u01b0\u1ee3ng:<\/strong>Chi\u1ec1u r\u1ed9ng c\u1ee7a thanh bi\u1ec3u th\u1ecb th\u1eddi gian x\u1eed l\u00fd.<\/li>\n<\/ul>\n

                  N\u1ebfu m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng \u0111ang th\u1ef1c hi\u1ec7n m\u1ed9t ph\u00e9p t\u00ednh k\u00e9o d\u00e0i, thanh s\u1ebd k\u00e9o d\u00e0i h\u01a1n v\u1ec1 ph\u00eda b\u00ean ph\u1ea3i. N\u1ebfu l\u00e0 tr\u1ea3 v\u1ec1 ngay l\u1eadp t\u1ee9c, thanh s\u1ebd r\u1ea5t h\u1eb9p.<\/p>\n

                  X\u1eed l\u00fd l\u1ed3ng gh\u00e9p<\/h3>\n

                  C\u00e1c h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p th\u01b0\u1eddng g\u1ecdi c\u00e1c h\u00e0m kh\u00e1c trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd. \u0110i\u1ec1u n\u00e0y t\u1ea1o ra m\u1ed9t c\u1ea5u tr\u00fac l\u1ed3ng gh\u00e9p.<\/p>\n

                    \n
                  • K\u00edch ho\u1ea1t con:<\/strong>B\u1ea1n c\u00f3 th\u1ec3 v\u1ebd m\u1ed9t thanh k\u00edch ho\u1ea1t nh\u1ecf h\u01a1n b\u00ean trong m\u1ed9t thanh l\u1edbn h\u01a1n \u0111\u1ec3 th\u1ec3 hi\u1ec7n m\u1ed9t l\u1eddi g\u1ecdi h\u00e0m.<\/li>\n
                  • Ch\u1ed3ng ch\u1ea5t:<\/strong>N\u1ebfu m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng b\u1ecb t\u1ea1m d\u1eebng trong khi ch\u1edd ph\u1ea3n h\u1ed3i, thanh k\u00edch ho\u1ea1t c\u00f3 th\u1ec3 t\u1ea1m d\u1eebng, t\u1ea1o ra m\u1ed9t kho\u1ea3ng tr\u1ed1ng trong d\u00f2ng th\u1eddi gian x\u1eed l\u00fd.<\/li>\n<\/ul>\n

                    X\u1eed l\u00fd \u0111\u1ed3ng th\u1eddi<\/h3>\n

                    C\u00e1c h\u1ec7 th\u1ed1ng hi\u1ec7n \u0111\u1ea1i th\u01b0\u1eddng s\u1eed d\u1ee5ng \u0111a lu\u1ed3ng. M\u1ed9t \u0111\u01b0\u1eddng s\u1ed1ng c\u00f3 th\u1ec3 \u0111\u1ea1i di\u1ec7n cho m\u1ed9t lu\u1ed3ng.<\/p>\n

                      \n
                    • C\u00e1c thanh song song:<\/strong>N\u1ebfu hai lu\u1ed3ng \u0111ang l\u00e0m vi\u1ec7c \u0111\u1ed3ng th\u1eddi, c\u00e1c thanh k\u00edch ho\u1ea1t c\u1ee7a ch\u00fang s\u1ebd ch\u1ed3ng l\u00ean nhau theo chi\u1ec1u ngang.<\/li>\n
                    • Xung \u0111\u1ed9t t\u00e0i nguy\u00ean:<\/strong>N\u1ebfu hai lu\u1ed3ng c\u1ea7n c\u00f9ng m\u1ed9t t\u00e0i nguy\u00ean, c\u00e1c thanh c\u1ee7a ch\u00fang c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecb tr\u1ea1ng th\u00e1i ch\u1edd, n\u01a1i m\u1ed9t lu\u1ed3ng t\u1ea1m d\u1eebng trong khi lu\u1ed3ng kia ch\u1ea1y.<\/li>\n<\/ul>\n

                      X\u1eed l\u00fd t\u00ednh \u0111\u1ed3ng th\u1eddi v\u00e0 song song \ud83d\udd04<\/h2>\n

                      T\u00ednh \u0111\u1ed3ng th\u1eddi l\u00e0 \u0111i\u1ec3m m\u00e0 s\u01a1 \u0111\u1ed3 th\u1eddi gian th\u1ef1c s\u1ef1 t\u1ecfa s\u00e1ng. S\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 g\u1eb7p kh\u00f3 kh\u0103n trong vi\u1ec7c th\u1ec3 hi\u1ec7n t\u00ednh song song th\u1ef1c s\u1ef1 v\u00ec ch\u00fang v\u1ed1n d\u0129 c\u00f3 b\u1ed1 c\u1ee5c tuy\u1ebfn t\u00ednh.<\/p>\n

                      Khung song song<\/h3>\n

                      Khi nhi\u1ec1u \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f9ng h\u00e0nh \u0111\u1ed9ng v\u00e0o c\u00f9ng m\u1ed9t th\u1eddi \u0111i\u1ec3m, b\u1ea1n nh\u00f3m c\u00e1c \u0111\u01b0\u1eddng s\u1ed1ng c\u1ee7a ch\u00fang l\u1ea1i v\u1edbi nhau.<\/p>\n

                        \n
                      • Thanh \u0111\u1ed3ng b\u1ed9:<\/strong>S\u1eed d\u1ee5ng m\u1ed9t thanh ngang d\u00e0y \u1edf ph\u00eda tr\u00ean nh\u00f3m \u0111\u1ec3 ch\u1ec9 c\u00e1c \u0111i\u1ec3m \u0111\u1ed3ng b\u1ed9 h\u00f3a.<\/li>\n
                      • Chia v\u00e0 n\u1ed1i:<\/strong>Hi\u1ec3n th\u1ecb n\u01a1i lu\u1ed3ng t\u00e1ch ra th\u00e0nh nhi\u1ec1u lu\u1ed3ng v\u00e0 n\u01a1i n\u00f3 h\u1ed9i t\u1ee5 tr\u1edf l\u1ea1i.<\/li>\n<\/ul>\n

                        C\u00e1c thao t\u00e1c xen k\u1ebd<\/h3>\n

                        Trong c\u00e1c h\u1ec7 th\u1ed1ng b\u1ed9 nh\u1edb chung, c\u00e1c thao t\u00e1c c\u00f3 th\u1ec3 xen k\u1ebd nhau.<\/p>\n

                          \n
                        • Chia th\u1eddi gian:<\/strong>Hi\u1ec3n th\u1ecb c\u00e1ch \u0111\u1ed1i t\u01b0\u1ee3ng A ch\u1ea1y trong 10ms, sau \u0111\u00f3 \u0111\u1ed1i t\u01b0\u1ee3ng B ch\u1ea1y trong 10ms, r\u1ed3i A ti\u1ebfp t\u1ee5c ch\u1ea1y.<\/li>\n
                        • Chuy\u1ec3n \u0111\u1ed5i ng\u1eef c\u1ea3nh:<\/strong>Kho\u1ea3ng tr\u1ed1ng gi\u1eefa c\u00e1c m\u1ea3nh n\u00e0y \u0111\u1ea1i di\u1ec7n cho chi ph\u00ed chuy\u1ec3n \u0111\u1ed5i ng\u1eef c\u1ea3nh.<\/li>\n<\/ul>\n

                          C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho m\u00f4 h\u00ecnh h\u00f3a r\u00f5 r\u00e0ng \u2705<\/h2>\n

                          \u0110\u1ec3 \u0111\u1ea3m b\u1ea3o s\u01a1 \u0111\u1ed3 c\u1ee7a b\u1ea1n h\u1eefu \u00edch cho \u0111\u1ed9i nh\u00f3m, h\u00e3y tu\u00e2n theo c\u00e1c h\u01b0\u1edbng d\u1eabn c\u1ea5u tr\u00fac sau.<\/p>\n

                          1. X\u00e1c \u0111\u1ecbnh thang th\u1eddi gian m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng<\/h3>\n

                          Kh\u00f4ng bao gi\u1edd gi\u1ea3 \u0111\u1ecbnh ng\u01b0\u1eddi \u0111\u1ecdc bi\u1ebft \u0111\u01b0\u1ee3c thang \u0111o. G\u1eafn nh\u00e3n tr\u1ee5c b\u1eb1ng \u0111\u01a1n v\u1ecb (ms, s, min). N\u1ebfu thang \u0111o kh\u00f4ng tuy\u1ebfn t\u00ednh, h\u00e3y ghi ch\u00fa r\u00f5 r\u00e0ng.<\/p>\n

                          2. Gi\u1eef c\u00e1c \u0111\u01b0\u1eddng s\u1ed1ng (lifelines) \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp g\u1ecdn g\u00e0ng<\/h3>\n

                          Gom c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng li\u00ean quan l\u1ea1i v\u1edbi nhau theo chi\u1ec1u d\u1ecdc. \u0110i\u1ec1u n\u00e0y gi\u00fap d\u1ec5 d\u00e0ng quan s\u00e1t lu\u1ed3ng th\u1eddi gian gi\u1eefa c\u00e1c h\u1ec7 th\u1ed1ng con c\u1ee5 th\u1ec3.<\/p>\n

                          3. Tr\u00e1nh l\u00e0m r\u1ed1i r\u1eafm<\/h3>\n

                          Kh\u00f4ng m\u00f4 h\u00ecnh h\u00f3a t\u1eebng mili gi\u00e2y n\u1ebfu \u0111i\u1ec1u \u0111\u00f3 l\u00e0m m\u1edd \u0111i logic ch\u00ednh. Gi\u1ea3m thi\u1ec3u c\u00e1c ng\u1eaft ph\u1ea7n c\u1ee9ng c\u1ea5p th\u1ea5p tr\u1eeb khi ch\u00fang l\u00e0 tr\u1ecdng t\u00e2m c\u1ee7a ph\u00e2n t\u00edch.<\/p>\n

                          4. S\u1eed d\u1ee5ng ch\u00fa th\u00edch<\/h3>\n

                          C\u00e1c t\u00ecnh hu\u1ed1ng \u0111\u1ecbnh th\u1eddi ph\u1ee9c t\u1ea1p c\u1ea7n c\u00f3 v\u0103n b\u1ea3n. S\u1eed d\u1ee5ng ghi ch\u00fa \u0111\u1ec3 gi\u1ea3i th\u00edcht\u1ea1i sao<\/em>m\u1ed9t \u0111\u1ed9 tr\u1ec5 \u0111\u00e3 x\u1ea3y ra. C\u00f3 ph\u1ea3i do ngh\u1ebdn m\u1ea1ng? C\u00f3 ph\u1ea3i do chu k\u1ef3 thu gom r\u00e1c?<\/p>\n

                          Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn c\u1ea7n tr\u00e1nh \u274c<\/h2>\n

                          Ngay c\u1ea3 nh\u1eefng ng\u01b0\u1eddi m\u00f4 h\u00ecnh h\u00f3a c\u00f3 kinh nghi\u1ec7m c\u0169ng m\u1eafc sai l\u1ea7m. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng l\u1ed7i ph\u1ed5 bi\u1ebfn nh\u1ea5t c\u1ea7n l\u01b0u \u00fd.<\/p>\n

                            \n
                          • Tr\u1ed9n l\u1eabn th\u1ee9 t\u1ef1 v\u00e0 th\u1eddi gian:<\/strong>Kh\u00f4ng s\u1eed d\u1ee5ng kho\u1ea3ng tr\u1ed1ng theo chi\u1ec1u d\u1ecdc \u0111\u1ec3 bi\u1ec3u di\u1ec5n th\u1eddi gian. Trong s\u01a1 \u0111\u1ed3 \u0111\u1ecbnh th\u1eddi, th\u1eddi gian ch\u1ec9 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n theo chi\u1ec1u ngang.<\/li>\n
                          • B\u1ecf qua c\u00e1c tin nh\u1eafn ph\u1ea3n h\u1ed3i:<\/strong>M\u1ed9t ph\u1ea3n h\u1ed3i th\u01b0\u1eddng m\u1ea5t th\u1eddi gian. N\u1ebfu b\u1ea1n ch\u1ec9 hi\u1ec3n th\u1ecb y\u00eau c\u1ea7u, t\u00ednh to\u00e1n \u0111\u1ed9 tr\u1ec5 t\u1ed5ng s\u1ebd sai.<\/li>\n
                          • \u0110\u01a1n gi\u1ea3n h\u00f3a qu\u00e1 m\u1ee9c:<\/strong>Xem t\u1ea5t c\u1ea3 \u0111\u1ed9 tr\u1ec5 l\u00e0 c\u1ed1 \u0111\u1ecbnh khi th\u1ef1c t\u1ebf ch\u00fang thay \u0111\u1ed5i c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng qu\u00e1 l\u1ea1c quan.<\/li>\n
                          • Thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i kh\u00f4ng r\u00f5 r\u00e0ng:<\/strong>N\u1ebfu m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 nhi\u1ec1u tr\u1ea1ng th\u00e1i, h\u00e3y g\u00e1n nh\u00e3n r\u00f5 r\u00e0ng cho ch\u00fang. C\u00e1c tr\u1ea1ng th\u00e1i m\u01a1 h\u1ed3 d\u1eabn \u0111\u1ebfn th\u1eddi gian m\u01a1 h\u1ed3.<\/li>\n<\/ul>\n

                            C\u00e1c t\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf \ud83c\udf0d<\/h2>\n

                            H\u00e3y c\u00f9ng xem c\u00e1ch c\u00e1c kh\u00e1i ni\u1ec7m n\u00e0y \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng v\u00e0o c\u00e1c v\u1ea5n \u0111\u1ec1 k\u1ef9 thu\u1eadt th\u1ef1c t\u1ebf.<\/p>\n

                            T\u00ecnh hu\u1ed1ng 1: \u0110i\u1ec1u khi\u1ec3n c\u1ea3m bi\u1ebfn nh\u00fang<\/h3>\n

                            M\u1ed9t b\u1ed9 \u0111i\u1ec1u khi\u1ec3n nh\u00fang \u0111\u1ecdc c\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111\u1ed9.<\/p>\n

                              \n
                            • Kho\u1ea3ng l\u1ea5y m\u1eabu:<\/strong>H\u1ec7 th\u1ed1ng ph\u1ea3i \u0111\u1ecdc m\u1ed7i 100ms.<\/li>\n
                            • X\u1eed l\u00fd:<\/strong>CPU c\u1ea7n 20ms \u0111\u1ec3 x\u1eed l\u00fd d\u1eef li\u1ec7u.<\/li>\n
                            • Giao ti\u1ebfp:<\/strong> G\u1eedi d\u1eef li\u1ec7u l\u00ean \u0111\u00e1m m\u00e2y m\u1ea5t 50ms.<\/li>\n<\/ul>\n

                              S\u01a1 \u0111\u1ed3 th\u1eddi gian cho th\u1ea5y \u0111\u01b0\u1eddng s\u1ed1ng c\u1ea3m bi\u1ebfn ho\u1ea1t \u0111\u1ed9ng, sau \u0111\u00f3 \u0111\u01b0\u1eddng s\u1ed1ng b\u1ed9 x\u1eed l\u00fd ho\u1ea1t \u0111\u1ed9ng, r\u1ed3i \u0111\u1ebfn \u0111\u01b0\u1eddng s\u1ed1ng m\u1ea1ng l\u01b0\u1edbi ho\u1ea1t \u0111\u1ed9ng. N\u1ebfu th\u1eddi gian x\u1eed l\u00fd v\u01b0\u1ee3t qu\u00e1 100ms, s\u01a1 \u0111\u1ed3 s\u1ebd cho th\u1ea5y s\u1ef1 h\u00ecnh th\u00e0nh \u0111\u1ed1ng ch\u1edd.<\/p>\n

                              T\u00ecnh hu\u1ed1ng 2: Thanh to\u00e1n th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed<\/h3>\n

                              M\u1ed9t ng\u01b0\u1eddi d\u00f9ng nh\u1ea5p v\u00e0o n\u00fat “Thanh to\u00e1n”.<\/p>\n

                                \n
                              • C\u1ed5ng thanh to\u00e1n:<\/strong>API b\u00ean ngo\u00e0i v\u1edbi \u0111\u1ed9 tr\u1ec5 bi\u1ebfn \u0111\u1ed5i (200ms – 2s).<\/li>\n
                              • Kh\u00f3a c\u01a1 s\u1edf d\u1eef li\u1ec7u:<\/strong>H\u1ec7 th\u1ed1ng kho l\u01b0u tr\u1eef kh\u00f3a m\u1eb7t h\u00e0ng trong 50ms.<\/li>\n
                              • Ph\u1ea3n h\u1ed3i ng\u01b0\u1eddi d\u00f9ng:<\/strong>Giao di\u1ec7n ng\u01b0\u1eddi d\u00f9ng ph\u1ea3i hi\u1ec3n th\u1ecb v\u00f2ng xoay \u00edt nh\u1ea5t 300ms \u0111\u1ec3 c\u1ea3m gi\u00e1c ph\u1ea3n h\u1ed3i nhanh.<\/li>\n<\/ul>\n

                                \u1ede \u0111\u00e2y, s\u01a1 \u0111\u1ed3 th\u1eddi gian gi\u00fap x\u00e1c \u0111\u1ecbnh th\u1eddi gian ch\u1edd t\u1ed1i thi\u1ec3u v\u00e0 t\u1ed1i \u0111a m\u00e0 ng\u01b0\u1eddi d\u00f9ng tr\u1ea3i nghi\u1ec7m. N\u00f3 gi\u00fap thi\u1ebft k\u1ebf th\u1eddi l\u01b0\u1ee3ng v\u00f2ng xoay giao di\u1ec7n ng\u01b0\u1eddi d\u00f9ng sao cho ph\u00f9 h\u1ee3p v\u1edbi th\u1ef1c t\u1ebf h\u1ec7 th\u1ed1ng.<\/p>\n

                                T\u00ecnh hu\u1ed1ng 3: \u0110i\u1ec1u ph\u1ed1i d\u1ecbch v\u1ee5 vi m\u00f4<\/h3>\n

                                D\u1ecbch v\u1ee5 A g\u1ecdi \u0111\u1ed3ng th\u1eddi d\u1ecbch v\u1ee5 B v\u00e0 C.<\/p>\n

                                  \n
                                • H\u1ed9i t\u1ee5:<\/strong>D\u1ecbch v\u1ee5 A ch\u1edd c\u1ea3 B v\u00e0 C.<\/li>\n
                                • Ng\u01b0\u1eddi ti\u00eau th\u1ee5 ch\u1eadm:<\/strong>Th\u1eddi gian t\u1ed5ng th\u1ec3 b\u1ecb chi ph\u1ed1i b\u1edfi d\u1ecbch v\u1ee5 ch\u1eadm h\u01a1n (d\u1ecbch v\u1ee5 C).<\/li>\n<\/ul>\n

                                  S\u01a1 \u0111\u1ed3 l\u00e0m n\u1ed5i b\u1eadt n\u01a1i d\u1ecbch v\u1ee5 A \u0111ang ch\u1edd \u0111\u1ee3i th\u00e0nh ph\u1ea7n ch\u1eadm nh\u1ea5t. \u0110i\u1ec1u n\u00e0y x\u00e1c \u0111\u1ecbnh \u0111i\u1ec3m ngh\u1ebdn c\u1ea7n t\u1ed1i \u01b0u h\u00f3a.<\/p>\n

                                  T\u00edch h\u1ee3p th\u1eddi gian v\u1edbi c\u00e1c m\u00f4 h\u00ecnh kh\u00e1c \ud83d\udcca<\/h2>\n

                                  S\u01a1 \u0111\u1ed3 th\u1eddi gian kh\u00f4ng t\u1ed3n t\u1ea1i m\u1ed9t c\u00e1ch \u0111\u1ed9c l\u1eadp. N\u00f3 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t nh\u1ea5t khi \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p v\u1edbi c\u00e1c m\u00f4 h\u00ecnh UML kh\u00e1c.<\/p>\n

                                  S\u01a1 \u0111\u1ed3 m\u00e1y tr\u1ea1ng th\u00e1i<\/h3>\n

                                  M\u00e1y tr\u1ea1ng th\u00e1i cho th\u1ea5y \u0111i\u1ec1u g\u00ec<\/em>x\u1ea3y ra. S\u01a1 \u0111\u1ed3 th\u1eddi gian cho th\u1ea5y khi n\u00e0o<\/em>. B\u1ea1n c\u00f3 th\u1ec3 \u00e1nh x\u1ea1 m\u1ed9t chuy\u1ec3n ti\u1ebfp trong m\u00e1y tr\u1ea1ng th\u00e1i sang m\u1ed9t kho\u1ea3ng th\u1eddi gian c\u1ee5 th\u1ec3 trong s\u01a1 \u0111\u1ed3 th\u1eddi gian.<\/p>\n

                                  S\u01a1 \u0111\u1ed3 ho\u1ea1t \u0111\u1ed9ng<\/h3>\n

                                  S\u01a1 \u0111\u1ed3 ho\u1ea1t \u0111\u1ed9ng th\u1ec3 hi\u1ec7n lu\u1ed3ng c\u00f4ng vi\u1ec7c. S\u01a1 \u0111\u1ed3 th\u1eddi gian th\u1ec3 hi\u1ec7n th\u1eddi l\u01b0\u1ee3ng c\u1ee7a c\u00e1c b\u01b0\u1edbc trong lu\u1ed3ng c\u00f4ng vi\u1ec7c \u0111\u00f3. S\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 ho\u1ea1t \u0111\u1ed9ng cho logic v\u00e0 s\u01a1 \u0111\u1ed3 th\u1eddi gian cho hi\u1ec7u su\u1ea5t.<\/p>\n

                                  S\u01a1 \u0111\u1ed3 th\u00e0nh ph\u1ea7n<\/h3>\n

                                  S\u01a1 \u0111\u1ed3 th\u00e0nh ph\u1ea7n th\u1ec3 hi\u1ec7n c\u1ea5u tr\u00fac. S\u01a1 \u0111\u1ed3 th\u1eddi gian th\u1ec3 hi\u1ec7n \u0111\u1ed9 tr\u1ec5 truy\u1ec1n th\u00f4ng gi\u1eefa c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u00f3.<\/p>\n

                                  Quy tr\u00ecnh t\u1ea1o t\u1eebng b\u01b0\u1edbc \ud83d\udcdd<\/h2>\n

                                  Th\u1ef1c hi\u1ec7n theo quy tr\u00ecnh n\u00e0y \u0111\u1ec3 x\u00e2y d\u1ef1ng s\u01a1 \u0111\u1ed3 c\u1ee7a b\u1ea1n t\u1eeb \u0111\u1ea7u.<\/p>\n

                                    \n
                                  1. X\u00e1c \u0111\u1ecbnh ph\u1ea1m vi:<\/strong>Quy\u1ebft \u0111\u1ecbnh khung th\u1eddi gian m\u00e0 b\u1ea1n \u0111ang m\u00f4 h\u00ecnh h\u00f3a. C\u00f3 ph\u1ea3i l\u00e0 1 gi\u00e2y? 1 ph\u00fat? 1 gi\u1edd?<\/li>\n
                                  2. X\u00e1c \u0111\u1ecbnh c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng:<\/strong>Li\u1ec7t k\u00ea c\u00e1c \u0111\u01b0\u1eddng s\u1ed1ng tham gia. Gi\u1eef s\u1ed1 l\u01b0\u1ee3ng \u1edf m\u1ee9c d\u1ec5 qu\u1ea3n l\u00fd.<\/li>\n
                                  3. B\u1ea3n \u0111\u1ed3 h\u00f3a c\u00e1c s\u1ef1 ki\u1ec7n:<\/strong>Ghi ch\u00fa \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u v\u00e0 k\u1ebft th\u00fac c\u1ee7a c\u00e1c h\u00e0nh \u0111\u1ed9ng ch\u00ednh.<\/li>\n
                                  4. Th\u00eam th\u1eddi l\u01b0\u1ee3ng:<\/strong>V\u1ebd c\u00e1c thanh k\u00edch ho\u1ea1t v\u00e0 thanh \u0111\u1ed9 tr\u1ec5 d\u1ef1a tr\u00ean d\u1eef li\u1ec7u.<\/li>\n
                                  5. Ph\u00e2n t\u00edch c\u00e1c kho\u1ea3ng tr\u1ed1ng:<\/strong>T\u00ecm ki\u1ebfm th\u1eddi gian ch\u1edd ho\u1eb7c x\u1eed l\u00fd ch\u1ed3ng ch\u00e9o.<\/li>\n
                                  6. Xem x\u00e9t v\u00e0 l\u1eb7p l\u1ea1i:<\/strong>Ki\u1ec3m tra xem logic v\u1ec1 th\u1eddi gian c\u00f3 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c gi\u1edbi h\u1ea1n th\u1ef1c t\u1ebf hay kh\u00f4ng.<\/li>\n<\/ol>\n

                                    K\u1ebft lu\u1eadn v\u1ec1 m\u00f4 h\u00ecnh h\u00f3a th\u1eddi gian \ud83c\udfc1<\/h2>\n

                                    M\u00f4 h\u00ecnh h\u00f3a \u0111\u1ed9 tr\u1ec5 tin nh\u1eafn v\u00e0 th\u1eddi gian x\u1eed l\u00fd l\u00e0 m\u1ed9t l\u0129nh v\u1ef1c k\u1ebft n\u1ed1i gi\u1eefa logic v\u00e0 v\u1eadt l\u00fd. Ph\u1ea7n m\u1ec1m t\u1ed3n t\u1ea1i trong th\u1ebf gi\u1edbi v\u1eadt l\u00fd, n\u01a1i th\u1eddi gian l\u00e0 m\u1ed9t t\u00e0i nguy\u00ean. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 Th\u1eddi gian UML, b\u1ea1n c\u00f4ng nh\u1eadn th\u1ef1c t\u1ebf n\u00e0y.<\/p>\n

                                    B\u1ea1n c\u00f3 kh\u1ea3 n\u0103ng tr\u1ef1c quan h\u00f3a nh\u1eefng chi ph\u00ed v\u00f4 h\u00ecnh trong t\u00ednh to\u00e1n. B\u1ea1n th\u1ea5y \u0111\u01b0\u1ee3c \u0111\u1ed9 tr\u1ec5 trong m\u1ea1ng l\u01b0\u1edbi v\u00e0 chi ph\u00ed ph\u1ee5 trong lu\u1ed3ng x\u1eed l\u00fd. S\u1ef1 minh b\u1ea1ch n\u00e0y d\u1eabn \u0111\u1ebfn thi\u1ebft k\u1ebf t\u1ed1t h\u01a1n, h\u1ec7 th\u1ed1ng v\u1eefng ch\u1eafc h\u01a1n v\u00e0 ng\u01b0\u1eddi d\u00f9ng h\u00e0i l\u00f2ng h\u01a1n.<\/p>\n

                                    B\u1eaft \u0111\u1ea7u nh\u1ecf g\u1ecdn. M\u00f4 h\u00ecnh h\u00f3a m\u1ed9t t\u01b0\u01a1ng t\u00e1c duy nh\u1ea5t v\u1edbi th\u1eddi gian ch\u00ednh x\u00e1c. M\u1edf r\u1ed9ng t\u1eeb \u0111\u00f3. S\u1ef1 r\u00f5 r\u00e0ng b\u1ea1n thu \u0111\u01b0\u1ee3c s\u1ebd ngay l\u1eadp t\u1ee9c c\u00f3 gi\u00e1 tr\u1ecb.<\/p>\n","protected":false},"excerpt":{"rendered":"

                                    Trong c\u00e1c ki\u1ebfn tr\u00fac ph\u1ea7n m\u1ec1m ph\u1ee9c t\u1ea1p, vi\u1ec7c hi\u1ec3u r\u00f5khi n\u00e0oc\u00e1c s\u1ef1 ki\u1ec7n x\u1ea3y ra l\u00e0 \u0111i\u1ec1u kh\u00f4ng k\u00e9m ph\u1ea7n quan tr\u1ecdng so v\u1edbi vi\u1ec7c bi\u1ebftg\u00ecx\u1ea3y ra. Trong khi…<\/p>\n","protected":false},"author":1,"featured_media":615,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"H\u01b0\u1edbng d\u1eabn S\u01a1 \u0111\u1ed3 Th\u1eddi gian UML: M\u00f4 h\u00ecnh h\u00f3a \u0111\u1ed9 tr\u1ec5 v\u00e0 th\u1eddi gian \u23f1\ufe0f","_yoast_wpseo_metadesc":"H\u1ecdc c\u00e1ch m\u00f4 h\u00ecnh h\u00f3a \u0111\u1ed9 tr\u1ec5 tin nh\u1eafn v\u00e0 th\u1eddi gian x\u1eed l\u00fd b\u1eb1ng S\u01a1 \u0111\u1ed3 Th\u1eddi gian UML. M\u1ed9t h\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n d\u00e0nh cho ki\u1ebfn tr\u00fac s\u01b0 v\u00e0 nh\u00e0 ph\u00e1t tri\u1ec3n.","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[13],"tags":[39,43],"class_list":["post-614","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unified-modeling-language","tag-academic","tag-timing-diagram"],"yoast_head":"\nH\u01b0\u1edbng d\u1eabn S\u01a1 \u0111\u1ed3 Th\u1eddi gian UML: M\u00f4 h\u00ecnh h\u00f3a \u0111\u1ed9 tr\u1ec5 v\u00e0 th\u1eddi gian \u23f1\ufe0f<\/title>\n<meta name=\"description\" content=\"H\u1ecdc c\u00e1ch m\u00f4 h\u00ecnh h\u00f3a \u0111\u1ed9 tr\u1ec5 tin nh\u1eafn v\u00e0 th\u1eddi gian x\u1eed l\u00fd b\u1eb1ng S\u01a1 \u0111\u1ed3 Th\u1eddi gian UML. 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