{"id":546,"date":"2026-04-07T13:19:13","date_gmt":"2026-04-07T13:19:13","guid":{"rendered":"https:\/\/www.viz-tools.com\/vi\/uml-timing-diagram-deep-dive-activation-bars-lifelines\/"},"modified":"2026-04-07T13:19:13","modified_gmt":"2026-04-07T13:19:13","slug":"uml-timing-diagram-deep-dive-activation-bars-lifelines","status":"publish","type":"post","link":"https:\/\/www.viz-tools.com\/vi\/uml-timing-diagram-deep-dive-activation-bars-lifelines\/","title":{"rendered":"Kh\u00e1m ph\u00e1 s\u00e2u v\u1ec1 s\u01a1 \u0111\u1ed3 Th\u1eddi gian UML: Hi\u1ec3u r\u00f5 v\u1ec1 thanh K\u00edch ho\u1ea1t, c\u00e1c \u0111\u01b0\u1eddng S\u1ed1ng c\u00f2n v\u00e0 c\u00e1c K\u00edch ho\u1ea1t Th\u1eddi gian"},"content":{"rendered":"

Trong b\u1ed1i c\u1ea3nh m\u00f4 h\u00ecnh h\u00f3a h\u1ec7 th\u1ed1ng, vi\u1ec7c tr\u1ef1c quan h\u00f3a h\u00e0nh vi ch\u1ec9 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh. Hi\u1ec3u r\u00f5khi<\/strong>th\u1eddi \u0111i\u1ec3m h\u00e0nh vi \u0111\u00f3 x\u1ea3y ra l\u00e0 \u0111i\u1ec1u kh\u00f4ng k\u00e9m ph\u1ea7n quan tr\u1ecdng. Trong khi s\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 minh h\u1ecda tr\u00ecnh t\u1ef1 t\u01b0\u01a1ng t\u00e1c, ch\u00fang th\u01b0\u1eddng thi\u1ebfu \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ea7n thi\u1ebft cho c\u00e1c h\u1ec7 th\u1ed1ng th\u1eddi gian th\u1ef1c. \u0110\u00e2y ch\u00ednh l\u00e0 l\u00fac s\u01a1 \u0111\u1ed3 Th\u1eddi gian UML tr\u1edf th\u00e0nh c\u00f4ng c\u1ee5 kh\u00f4ng th\u1ec3 thi\u1ebfu \u0111\u1ed1i v\u1edbi c\u00e1c ki\u1ebfn tr\u00fac s\u01b0 v\u00e0 k\u1ef9 s\u01b0. N\u00f3 cung c\u1ea5p c\u00e1i nh\u00ecn ch\u00ednh x\u00e1c v\u1ec1 tr\u1ea1ng th\u00e1i c\u1ee7a c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng theo th\u1eddi gian, t\u1eadp trung v\u00e0o th\u1eddi \u0111i\u1ec3m x\u1ea3y ra s\u1ef1 ki\u1ec7n thay v\u00ec ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 th\u1ee9 t\u1ef1 c\u1ee7a ch\u00fang.<\/p>\n

H\u01b0\u1edbng d\u1eabn n\u00e0y kh\u00e1m ph\u00e1 c\u00e1c c\u01a1 ch\u1ebf c\u1ed1t l\u00f5i c\u1ee7a s\u01a1 \u0111\u1ed3 th\u1eddi gian. Ch\u00fang ta s\u1ebd ph\u00e2n t\u00edch c\u1ea5u t\u1ea1o c\u1ee7a c\u00e1c \u0111\u01b0\u1eddng s\u1ed1ng c\u00f2n, gi\u1ea3i th\u00edch \u00fd ngh\u0129a c\u1ee7a c\u00e1c thanh k\u00edch ho\u1ea1t, v\u00e0 ph\u00e2n t\u00edch c\u00e1ch c\u00e1c k\u00edch ho\u1ea1t th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng trong m\u00f4 h\u00ecnh. \u0110\u1ebfn cu\u1ed1i b\u00e0i kh\u00e1m ph\u00e1 s\u00e2u n\u00e0y, b\u1ea1n s\u1ebd n\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c v\u1ec1 c\u00e1ch x\u00e2y d\u1ef1ng v\u00e0 di\u1ec5n gi\u1ea3i c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y \u0111\u1ec3 ph\u00e2n t\u00edch th\u1eddi gian ph\u1ee9c t\u1ea1p.<\/p>\n

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

\ud83d\udccf N\u1ec1n t\u1ea3ng: Hi\u1ec3u r\u00f5 tr\u1ee5c Th\u1eddi gian<\/h2>\n

Tr\u01b0\u1edbc khi xem x\u00e9t t\u1eebng th\u00e0nh ph\u1ea7n ri\u00eang l\u1ebb, ng\u01b0\u1eddi d\u00f9ng c\u1ea7n n\u1eafm v\u1eefng h\u1ec7 t\u1ecda \u0111\u1ed9 c\u1ee7a s\u01a1 \u0111\u1ed3. Kh\u00e1c v\u1edbi s\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 n\u01a1i th\u1eddi gian ch\u1ea3y xu\u1ed1ng d\u01b0\u1edbi, s\u01a1 \u0111\u1ed3 th\u1eddi gian th\u01b0\u1eddng c\u00f3 tr\u1ee5c th\u1eddi gian n\u1eb1m ngang. Tuy nhi\u00ean, m\u1ed9t s\u1ed1 k\u00fd hi\u1ec7u cho ph\u00e9p bi\u1ec3u di\u1ec5n th\u1eddi gian theo chi\u1ec1u th\u1eb3ng \u0111\u1ee9ng. Quy \u01b0\u1edbc chu\u1ea9n \u0111\u1eb7t th\u1eddi gian ti\u1ebfn tri\u1ec3n t\u1eeb tr\u00e1i sang ph\u1ea3i.<\/p>\n

    \n
  • G\u1ed1c th\u1eddi gian:<\/strong> \u0110i\u1ec3m kh\u1edfi \u0111\u1ea7u c\u1ee7a \u0111\u01b0\u1eddng th\u1eddi gian, th\u01b0\u1eddng \u0111\u01b0\u1ee3c k\u00fd hi\u1ec7u l\u00e0 th\u1eddi \u0111i\u1ec3m kh\u00f4ng.<\/li>\n
  • Kho\u1ea3ng th\u1eddi gian:<\/strong> Kho\u1ea3ng c\u00e1ch gi\u1eefa hai \u0111i\u1ec3m tr\u00ean tr\u1ee5c \u0111\u1ea1i di\u1ec7n cho m\u1ed9t kho\u1ea3ng th\u1eddi gian c\u1ee5 th\u1ec3.<\/li>\n
  • T\u1ef7 l\u1ec7 th\u1eddi gian:<\/strong> \u0110\u01a1n v\u1ecb c\u00f3 th\u1ec3 thay \u0111\u1ed5i (mili gi\u00e2y, gi\u00e2y, chu k\u1ef3 \u0111\u1ed3ng h\u1ed3) t\u00f9y thu\u1ed9c v\u00e0o h\u1ec7 th\u1ed1ng \u0111ang \u0111\u01b0\u1ee3c m\u00f4 h\u00ecnh h\u00f3a.<\/li>\n<\/ul>\n

    S\u1ef1 ti\u1ebfn tri\u1ec3n theo chi\u1ec1u ngang n\u00e0y cho ph\u00e9p tr\u1ef1c quan h\u00f3a c\u00e1c qu\u00e1 tr\u00ecnh song song. Nhi\u1ec1u \u0111\u01b0\u1eddng s\u1ed1ng c\u00f2n c\u00f3 th\u1ec3 ch\u1ea1y \u0111\u1ed3ng th\u1eddi, cho th\u1ea5y c\u00e1ch c\u00e1c b\u1ed9 ph\u1eadn kh\u00e1c nhau c\u1ee7a h\u1ec7 th\u1ed1ng ph\u1ea3n \u1ee9ng trong c\u00f9ng m\u1ed9t khung th\u1eddi gian. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c \u0111i\u1ec1u ki\u1ec7n c\u1ea1nh tranh ho\u1eb7c v\u1ea5n \u0111\u1ec1 \u0111\u1ed9 tr\u1ec5.<\/p>\n

    \ud83d\udccd C\u00e1c \u0111\u01b0\u1eddng S\u1ed1ng c\u00f2n: C\u1ed1t l\u00f5i c\u1ee7a ph\u00e2n t\u00edch theo th\u1eddi gian<\/h2>\n

    C\u00e1c \u0111\u01b0\u1eddng s\u1ed1ng c\u00f2n \u0111\u00f3ng vai tr\u00f2 nh\u01b0 c\u00e1c \u0111\u01b0\u1eddng ch\u1ea1y d\u1ecdc ho\u1eb7c ngang n\u01a1i c\u00e1c s\u1ef1 ki\u1ec7n x\u1ea3y ra. Trong b\u1ed1i c\u1ea3nh s\u01a1 \u0111\u1ed3 th\u1eddi gian, m\u1ed9t \u0111\u01b0\u1eddng s\u1ed1ng c\u00f2n \u0111\u1ea1i di\u1ec7n cho m\u1ed9t th\u1ec3 hi\u1ec7n c\u1ee7a m\u1ed9t b\u1ed9 ph\u00e2n lo\u1ea1i. \u0110\u00f3 l\u00e0 s\u1ef1 t\u1ed3n t\u1ea1i li\u00ean t\u1ee5c c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng ho\u1eb7c th\u00e0nh ph\u1ea7n h\u1ec7 th\u1ed1ng trong m\u1ed9t kho\u1ea3ng th\u1eddi gian c\u1ee5 th\u1ec3.<\/p>\n

    \ud83d\udd39 \u0110\u1eb7c \u0111i\u1ec3m ch\u00ednh c\u1ee7a c\u00e1c \u0111\u01b0\u1eddng S\u1ed1ng c\u00f2n<\/h3>\n
      \n
    • S\u1ef1 hi\u1ec7n di\u1ec7n:<\/strong> M\u1ed9t \u0111\u01b0\u1eddng s\u1ed1ng c\u00f2n t\u1ed3n t\u1ea1i t\u1eeb l\u00fac \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c t\u1ea1o ra cho \u0111\u1ebfn khi b\u1ecb h\u1ee7y.<\/li>\n
    • S\u1ef1 thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i:<\/strong> Trong khi \u0111\u01b0\u1eddng s\u1ed1ng c\u00f2n \u0111\u1ea1i di\u1ec7n cho \u0111\u1ed1i t\u01b0\u1ee3ng, tr\u1ea1ng th\u00e1i c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u00f3 thay \u0111\u1ed5i t\u1ea1i nh\u1eefng \u0111i\u1ec3m c\u1ee5 th\u1ec3 d\u1ecdc theo \u0111\u01b0\u1eddng th\u1eddi gian.<\/li>\n
    • \u0110i\u1ec3m t\u1eadp trung ki\u1ec3m so\u00e1t:<\/strong> M\u1ed9t lo\u1ea1i \u0111\u01b0\u1eddng s\u1ed1ng c\u00f2n \u0111\u1eb7c bi\u1ec7t, g\u1ecdi l\u00e0 \u0110i\u1ec3m t\u1eadp trung ki\u1ec3m so\u00e1t, cho bi\u1ebft kho\u1ea3ng th\u1eddi gian m\u00e0 m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng \u0111ang th\u1ef1c hi\u1ec7n m\u1ed9t thao t\u00e1c.<\/li>\n<\/ul>\n

      Khi m\u00f4 h\u00ecnh h\u00f3a c\u00e1c h\u1ec7 th\u1ed1ng nh\u00fang ho\u1eb7c giao th\u1ee9c m\u1ea1ng, c\u00e1c \u0111\u01b0\u1eddng s\u1ed1ng c\u00f2n th\u01b0\u1eddng \u0111\u1ea1i di\u1ec7n cho c\u00e1c th\u00e0nh ph\u1ea7n ph\u1ea7n c\u1ee9ng, c\u00e1c m\u00f4-\u0111un ph\u1ea7n m\u1ec1m ho\u1eb7c c\u00e1c giao di\u1ec7n b\u00ean ngo\u00e0i. Vi\u1ec7c gi\u1eef cho c\u00e1c \u0111\u01b0\u1eddng s\u1ed1ng c\u00f2n r\u00f5 r\u00e0ng v\u00e0 \u0111\u01b0\u1ee3c ghi nh\u00e3n ch\u00ednh x\u00e1c l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh d\u1ec5 \u0111\u1ecdc. N\u1ebfu t\u1ed3n t\u1ea1i nhi\u1ec1u th\u1ec3 hi\u1ec7n c\u1ee7a c\u00f9ng m\u1ed9t l\u1edbp, m\u1ed7i th\u1ec3 hi\u1ec7n ph\u1ea3i c\u00f3 m\u1ed9t \u0111\u01b0\u1eddng s\u1ed1ng c\u00f2n ri\u00eang bi\u1ec7t \u0111\u1ec3 tr\u00e1nh s\u1ef1 m\u01a1 h\u1ed3 v\u1ec1 th\u1ec3 hi\u1ec7n n\u00e0o \u0111ang ph\u1ea3n h\u1ed3i v\u1edbi m\u1ed9t t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t.<\/p>\n

      \ud83d\udfe6 C\u00e1c thanh K\u00edch ho\u1ea1t: Tr\u1ef1c quan h\u00f3a qu\u00e1 tr\u00ecnh th\u1ef1c thi<\/h2>\n

      C\u00e1c thanh k\u00edch ho\u1ea1t (\u0111\u00f4i khi \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u00e1c s\u1ef1 ki\u1ec7n th\u1ef1c thi) l\u00e0 c\u00e1c v\u00f9ng h\u00ecnh ch\u1eef nh\u1eadt \u0111\u01b0\u1ee3c \u0111\u1eb7t tr\u00ean m\u1ed9t \u0111\u01b0\u1eddng s\u1ed1ng c\u00f2n. Ch\u00fang ch\u1ec9 ra kho\u1ea3ng th\u1eddi gian m\u00e0 m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng \u0111ang t\u00edch c\u1ef1c th\u1ef1c hi\u1ec7n m\u1ed9t thao t\u00e1c. \u0110i\u1ec1u n\u00e0y kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 m\u1ed9t \u0111i\u1ec3m trong th\u1eddi gian; m\u00e0 l\u00e0 m\u1ed9t kho\u1ea3ng th\u1eddi gian th\u1ef1c hi\u1ec7n c\u00f4ng vi\u1ec7c.<\/p>\n

      \ud83d\udd39 Nh\u1eefng th\u00f4ng tin m\u00e0 c\u00e1c thanh K\u00edch ho\u1ea1t truy\u1ec1n \u0111\u1ea1t<\/h3>\n
        \n
      • Th\u1eddi l\u01b0\u1ee3ng:<\/strong> Chi\u1ec1u d\u00e0i c\u1ee7a thanh t\u01b0\u01a1ng \u1ee9ng v\u1edbi th\u1eddi gian c\u1ea7n thi\u1ebft \u0111\u1ec3 ho\u00e0n th\u00e0nh thao t\u00e1c.<\/li>\n
      • T\u00ednh \u0111\u1ed3ng th\u1eddi:<\/strong> N\u1ebfu hai thanh ch\u1ed3ng l\u00ean nhau theo chi\u1ec1u ngang, \u0111i\u1ec1u \u0111\u00f3 cho th\u1ea5y c\u00e1c thao t\u00e1c \u0111ang ch\u1ea1y \u0111\u1ed3ng th\u1eddi tr\u00ean c\u00f9ng m\u1ed9t \u0111\u01b0\u1eddng s\u1ed1ng (t\u00e1i nh\u1eadp) ho\u1eb7c c\u00e1c \u0111\u01b0\u1eddng s\u1ed1ng kh\u00e1c nhau.<\/li>\n
      • Kh\u1ea3 n\u0103ng b\u1ecb ng\u1eaft:<\/strong>M\u1ed9t kho\u1ea3ng tr\u1ed1ng trong thanh k\u00edch ho\u1ea1t c\u00f3 th\u1ec3 cho th\u1ea5y s\u1ef1 ng\u1eaft qu\u00e3ng ho\u1eb7c t\u1ea1m d\u1eebng trong qu\u00e1 tr\u00ecnh th\u1ef1c thi.<\/li>\n<\/ul>\n

        Hi\u1ec3u r\u00f5 v\u1ec1 c\u00e1c thanh k\u00edch ho\u1ea1t l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft cho ph\u00e2n t\u00edch hi\u1ec7u su\u1ea5t. N\u1ebfu m\u1ed9t thao t\u00e1c \u0111\u01b0\u1ee3c k\u1ef3 v\u1ecdng ho\u00e0n th\u00e0nh trong 10 mili gi\u00e2y nh\u01b0ng thanh k\u00edch ho\u1ea1t k\u00e9o d\u00e0i \u0111\u1ebfn 50 mili gi\u00e2y, m\u00f4 h\u00ecnh s\u1ebd ti\u1ebft l\u1ed9 \u0111i\u1ec3m ngh\u1ebdn hi\u1ec7u su\u1ea5t. D\u1ea5u hi\u1ec7u tr\u1ef1c quan n\u00e0y gi\u00fap x\u00e1c \u0111\u1ecbnh n\u01a1i c\u00e1c \u0111\u1ed9 tr\u1ec5 \u0111ang t\u00edch t\u1ee5 trong m\u1ed9t quy tr\u00ecnh.<\/p>\n

        Ghi ch\u00fa:<\/strong>Trong m\u1ed9t s\u1ed1 k\u00fd hi\u1ec7u, c\u00e1c thanh k\u00edch ho\u1ea1t \u0111\u01b0\u1ee3c thay th\u1ebf b\u1eb1ng c\u00e1c thanh t\u1eadp trung ki\u1ec3m so\u00e1t. M\u1eb7c d\u00f9 t\u01b0\u01a1ng t\u1ef1, thanh t\u1eadp trung ki\u1ec3m so\u00e1t \u0111\u1eb7c bi\u1ec7t nh\u1ea5n m\u1ea1nh v\u00e0o ng\u1eef c\u1ea3nh th\u1ef1c thi \u0111ang ho\u1ea1t \u0111\u1ed9ng, trong khi thanh k\u00edch ho\u1ea1t ch\u1ec9 \u0111\u01a1n gi\u1ea3n \u0111\u00e1nh d\u1ea5u th\u1eddi gian th\u1ef1c hi\u1ec7n thao t\u00e1c.<\/p>\n

        \u23f1\ufe0f K\u00edch ho\u1ea1t th\u1eddi gian: C\u00e1c ch\u1ea5t x\u00fac t\u00e1c c\u1ee7a s\u1ef1 thay \u0111\u1ed5i<\/h2>\n

        C\u00e1c s\u1ef1 ki\u1ec7n kh\u00f4ng x\u1ea3y ra trong kho\u1ea3ng tr\u1ed1ng. Ch\u00fang \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t b\u1edfi t\u00edn hi\u1ec7u, tin nh\u1eafn ho\u1eb7c c\u00e1c r\u00e0ng bu\u1ed9c th\u1eddi gian c\u1ee5 th\u1ec3. Trong s\u01a1 \u0111\u1ed3 th\u1eddi gian, nh\u1eefng k\u00edch ho\u1ea1t n\u00e0y l\u00e0 c\u00e1c m\u0169i t\u00ean ho\u1eb7c ch\u00fa th\u00edch k\u1ebft n\u1ed1i c\u00e1c \u0111\u01b0\u1eddng s\u1ed1ng ho\u1eb7c \u0111\u00e1nh d\u1ea5u c\u00e1c \u0111i\u1ec3m tr\u00ean tr\u1ee5c.<\/p>\n

        \ud83d\udd39 C\u00e1c lo\u1ea1i k\u00edch ho\u1ea1t<\/h3>\n
          \n
        • Tin nh\u1eafn t\u00edn hi\u1ec7u:<\/strong>C\u00e1c s\u1ef1 ki\u1ec7n b\u1ea5t \u0111\u1ed3ng b\u1ed9 \u0111\u01b0\u1ee3c g\u1eedi t\u1eeb m\u1ed9t \u0111\u01b0\u1eddng s\u1ed1ng sang \u0111\u01b0\u1eddng s\u1ed1ng kh\u00e1c. Kh\u00e1c v\u1edbi l\u1eddi g\u1ecdi ph\u01b0\u01a1ng th\u1ee9c, t\u00edn hi\u1ec7u kh\u00f4ng ch\u1edd gi\u00e1 tr\u1ecb tr\u1ea3 v\u1ec1 ngay l\u1eadp t\u1ee9c.<\/li>\n
        • R\u00e0ng bu\u1ed9c th\u1eddi gian:<\/strong>C\u00e1c \u0111i\u1ec1u ki\u1ec7n ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u00e1p \u1ee9ng tr\u01b0\u1edbc khi h\u00e0nh \u0111\u1ed9ng ti\u1ebfp t\u1ee5c. V\u00ed d\u1ee5: \u201cCh\u1edd cho \u0111\u1ebfn khi 5 gi\u00e2y tr\u00f4i qua.\u201d<\/li>\n
        • S\u1ef1 thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i:<\/strong>C\u00e1c chuy\u1ec3n ti\u1ebfp trong tr\u1ea1ng th\u00e1i n\u1ed9i b\u1ed9 c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng, ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t k\u00edch ho\u1ea1t cho c\u00e1c h\u00e0nh \u0111\u1ed9ng ti\u1ebfp theo.<\/li>\n<\/ul>\n

          Khi m\u1ed9t t\u00edn hi\u1ec7u \u0111\u01b0\u1ee3c g\u1eedi, n\u00f3 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng m\u1ed9t \u0111\u01b0\u1eddng n\u1ed1i hai \u0111\u01b0\u1eddng s\u1ed1ng. \u0110\u01b0\u1eddng n\u00e0y c\u00f3 th\u1ec3 l\u00e0 \u0111\u01b0\u1eddng li\u1ec1n ho\u1eb7c \u0111\u01b0\u1eddng \u0111\u1ee9t \u0111o\u1ea1n. \u0110\u01b0\u1eddng li\u1ec1n th\u01b0\u1eddng bi\u1ec3u th\u1ecb m\u1ed9t l\u1eddi g\u1ecdi \u0111\u1ed3ng b\u1ed9 ho\u1eb7c m\u1ed9t t\u00edn hi\u1ec7u mong \u0111\u1ee3i ph\u1ea3n h\u1ed3i. \u0110\u01b0\u1eddng \u0111\u1ee9t \u0111o\u1ea1n th\u01b0\u1eddng bi\u1ec3u th\u1ecb m\u1ed9t t\u00edn hi\u1ec7u ho\u1eb7c tin nh\u1eafn b\u1ea5t \u0111\u1ed3ng b\u1ed9 m\u00e0 ng\u01b0\u1eddi g\u1eedi kh\u00f4ng ch\u1edd x\u00e1c nh\u1eadn.<\/p>\n

          \ud83d\udd39 \u0110\u1ed9 tr\u1ec5 th\u1eddi gian v\u00e0 \u0111\u1ed9 tr\u1ec5<\/h3>\n

          M\u1ed9t trong nh\u1eefng t\u00ednh n\u0103ng m\u1ea1nh m\u1ebd nh\u1ea5t c\u1ee7a s\u01a1 \u0111\u1ed3 th\u1eddi gian l\u00e0 kh\u1ea3 n\u0103ng m\u00f4 h\u00ecnh h\u00f3a r\u00f5 r\u00e0ng c\u00e1c \u0111\u1ed9 tr\u1ec5. N\u1ebfu m\u1ed9t tin nh\u1eafn \u0111\u01b0\u1ee3c g\u1eedi nh\u01b0ng kh\u00f4ng \u0111\u01b0\u1ee3c nh\u1eadn ngay l\u1eadp t\u1ee9c, kho\u1ea3ng c\u00e1ch gi\u1eefa ng\u01b0\u1eddi g\u1eedi v\u00e0 ng\u01b0\u1eddi nh\u1eadn tr\u00ean tr\u1ee5c th\u1eddi gian \u0111\u1ea1i di\u1ec7n cho \u0111\u1ed9 tr\u1ec5 m\u1ea1ng ho\u1eb7c th\u1eddi gian x\u1eed l\u00fd.<\/p>\n

          V\u00ed d\u1ee5, trong m\u1ed9t m\u1ea1ng c\u1ea3m bi\u1ebfn, m\u1ed9t g\u00f3i d\u1eef li\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1edfi m\u1ed9t n\u00fat c\u1ea3m bi\u1ebfn. S\u01a1 \u0111\u1ed3 th\u1eddi gian cho th\u1ea5y ch\u00ednh x\u00e1c th\u1eddi \u0111i\u1ec3m d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c t\u1ea1o ra v\u00e0 ch\u00ednh x\u00e1c th\u1eddi \u0111i\u1ec3m n\u00f3 \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1edfi b\u1ed9 \u0111i\u1ec1u khi\u1ec3n trung t\u00e2m. Kho\u1ea3ng c\u00e1ch ngang gi\u1eefa hai \u0111i\u1ec3m n\u00e0y l\u00e0 \u0111\u1ed9 tr\u1ec5 h\u1ec7 th\u1ed1ng. C\u00e1c k\u1ef9 s\u01b0 s\u1eed d\u1ee5ng \u0111i\u1ec1u n\u00e0y \u0111\u1ec3 x\u00e1c minh xem h\u1ec7 th\u1ed1ng c\u00f3 \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u th\u1eddi gian th\u1ef1c hay kh\u00f4ng.<\/p>\n

          \ud83d\udcca So s\u00e1nh c\u00e1c th\u00e0nh ph\u1ea7n: G\u00f3c nh\u00ecn c\u00f3 c\u1ea5u tr\u00fac<\/h2>\n

          \u0110\u1ec3 l\u00e0m r\u00f5 m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c th\u00e0nh ph\u1ea7n kh\u00e1c nhau, b\u1ea3ng sau \u0111\u00e2y ph\u00e2n t\u00edch c\u00e1c th\u00e0nh ph\u1ea7n ti\u00eau chu\u1ea9n xu\u1ea5t hi\u1ec7n trong s\u01a1 \u0111\u1ed3 Th\u1eddi gian UML.<\/p>\n\n\n\n\n\n\n\n\n\n
          Th\u00e0nh ph\u1ea7n<\/th>\nM\u00f4 t\u1ea3<\/th>\nBi\u1ec3u di\u1ec5n tr\u1ef1c quan<\/th>\nTr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng ch\u00ednh<\/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 th\u00e0nh vi\u00ean theo th\u1eddi gian.<\/td>\n\u0110\u01b0\u1eddng th\u1eb3ng \u0111\u1ee9ng ho\u1eb7c n\u1eb1m ngang.<\/td>\nTheo d\u00f5i s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng.<\/td>\n<\/tr>\n
          Thanh k\u00edch ho\u1ea1t<\/td>\nCh\u1ec9 ra vi\u1ec7c th\u1ef1c thi ho\u1ea1t \u0111\u1ed9ng \u0111ang di\u1ec5n ra.<\/td>\nH\u1ed9p h\u00ecnh ch\u1eef nh\u1eadt tr\u00ean \u0111\u01b0\u1eddng \u0111\u1eddi s\u1ed1ng.<\/td>\n\u0110o th\u1eddi gian th\u1ef1c hi\u1ec7n ho\u1ea1t \u0111\u1ed9ng.<\/td>\n<\/tr>\n
          M\u0169i t\u00ean tin nh\u1eafn<\/td>\nHi\u1ec3n th\u1ecb s\u1ef1 giao ti\u1ebfp gi\u1eefa c\u00e1c \u0111\u01b0\u1eddng \u0111\u1eddi s\u1ed1ng.<\/td>\nM\u0169i t\u00ean k\u1ebft n\u1ed1i c\u00e1c \u0111\u01b0\u1eddng \u0111\u1eddi s\u1ed1ng.<\/td>\nCh\u1ec9 ra lu\u1ed3ng d\u1eef li\u1ec7u ho\u1eb7c t\u00edn hi\u1ec7u.<\/td>\n<\/tr>\n
          R\u00e0ng bu\u1ed9c th\u1eddi gian<\/td>\nX\u00e1c \u0111\u1ecbnh m\u1ed9t y\u00eau c\u1ea7u th\u1eddi gian c\u1ee5 th\u1ec3.<\/td>\nNh\u00e3n v\u0103n b\u1ea3n trong d\u1ea5u ngo\u1eb7c nh\u1ecdn, v\u00ed d\u1ee5: [t > 5s].<\/td>\nTh\u1ef1c thi c\u00e1c quy t\u1eafc v\u1ec1 th\u1eddi gian.<\/td>\n<\/tr>\n
          \u0110i\u1ec3m t\u1eadp trung ki\u1ec3m so\u00e1t<\/td>\nCh\u1ec9 ra \u0111\u1ed1i t\u01b0\u1ee3ng \u0111ang th\u1ef1c thi m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c.<\/td>\nH\u00ecnh ch\u1eef nh\u1eadt h\u1eb9p tr\u00ean \u0111\u01b0\u1eddng \u0111\u1eddi s\u1ed1ng.<\/td>\nNh\u1ea5n m\u1ea1nh ki\u1ec3m so\u00e1t \u0111ang ho\u1ea1t \u0111\u1ed9ng.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          \ud83d\udee0\ufe0f C\u00e1c kh\u00e1i ni\u1ec7m n\u00e2ng cao: \u0110\u01b0\u1eddng \u0111\u1eddi s\u1ed1ng l\u1ed3ng gh\u00e9p v\u00e0 r\u00e0ng bu\u1ed9c th\u1eddi gian<\/h2>\n

          Khi h\u1ec7 th\u1ed1ng ng\u00e0y c\u00e0ng ph\u1ee9c t\u1ea1p, c\u00e1c s\u01a1 \u0111\u1ed3 tuy\u1ebfn t\u00ednh \u0111\u01a1n gi\u1ea3n tr\u1edf n\u00ean kh\u00f4ng \u0111\u1ee7. C\u00e1c s\u01a1 \u0111\u1ed3 th\u1eddi gian n\u00e2ng cao s\u1eed d\u1ee5ng c\u00e1c \u0111\u01b0\u1eddng \u0111\u1eddi s\u1ed1ng l\u1ed3ng gh\u00e9p v\u00e0 c\u00e1c r\u00e0ng bu\u1ed9c th\u1eddi gian ph\u1ee9c t\u1ea1p \u0111\u1ec3 m\u00f4 h\u00ecnh h\u00f3a h\u00e0nh vi ph\u00e2n c\u1ea5p.<\/p>\n

          \ud83d\udd39 \u0110\u01b0\u1eddng \u0111\u1eddi s\u1ed1ng l\u1ed3ng gh\u00e9p<\/h3>\n

          Vi\u1ec7c l\u1ed3ng gh\u00e9p cho ph\u00e9p b\u1ea1n th\u1ec3 hi\u1ec7n r\u1eb1ng m\u1ed9t \u0111\u01b0\u1eddng \u0111\u1eddi s\u1ed1ng thu\u1ed9c v\u1ec1 m\u1ed9t \u0111\u01b0\u1eddng kh\u00e1c. \u0110i\u1ec1u n\u00e0y ph\u1ed5 bi\u1ebfn trong m\u00f4 h\u00ecnh h\u00f3a h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng, n\u01a1i m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng ch\u1ee9a \u0111\u1ef1ng qu\u1ea3n l\u00fd nhi\u1ec1u th\u00e0nh ph\u1ea7n con. V\u1ec1 m\u1eb7t tr\u1ef1c quan, \u0111\u01b0\u1eddng \u0111\u1eddi s\u1ed1ng c\u1ee7a th\u00e0nh ph\u1ea7n con \u0111\u01b0\u1ee3c v\u1ebd b\u00ean trong bi\u00ean gi\u1edbi c\u1ee7a \u0111\u01b0\u1eddng \u0111\u1eddi s\u1ed1ng cha. C\u1ea5u tr\u00fac n\u00e0y gi\u00fap hi\u1ec3u r\u00f5 ph\u1ea1m vi v\u00e0 quy\u1ec1n s\u1edf h\u1eefu t\u00e0i nguy\u00ean trong c\u00e1c kho\u1ea3ng th\u1eddi gian c\u1ee5 th\u1ec3.<\/p>\n

          \ud83d\udd39 R\u00e0ng bu\u1ed9c th\u1eddi gian v\u00e0 OCL<\/h3>\n

          C\u00e1c r\u00e0ng bu\u1ed9c th\u1eddi gian th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng k\u00fd hi\u1ec7u to\u00e1n h\u1ecdc ho\u1eb7c Ng\u00f4n ng\u1eef r\u00e0ng bu\u1ed9c \u0111\u1ed1i t\u01b0\u1ee3ng (OCL). Nh\u1eefng r\u00e0ng bu\u1ed9c n\u00e0y x\u00e1c \u0111\u1ecbnh c\u00e1c gi\u1edbi h\u1ea1n m\u00e0 m\u1ed9t thao t\u00e1c ph\u1ea3i x\u1ea3y ra.<\/p>\n

            \n
          • \u0110i\u1ec1u ki\u1ec7n ti\u1ec1n nhi\u1ec7m:<\/strong>C\u00e1c y\u00eau c\u1ea7u ph\u1ea3i \u0111\u00fang tr\u01b0\u1edbc khi kho\u1ea3ng th\u1eddi gian b\u1eaft \u0111\u1ea7u.<\/li>\n
          • \u0110i\u1ec1u ki\u1ec7n h\u1eadu nhi\u1ec7m:<\/strong>C\u00e1c y\u00eau c\u1ea7u ph\u1ea3i \u0111\u00fang sau khi kho\u1ea3ng th\u1eddi gian k\u1ebft th\u00fac.<\/li>\n
          • B\u1ea5t bi\u1ebfn:<\/strong>M\u1ed9t \u0111i\u1ec1u ki\u1ec7n ph\u1ea3i lu\u00f4n \u0111\u00fang trong su\u1ed1t to\u00e0n b\u1ed9 th\u1eddi gian th\u1ef1c hi\u1ec7n thao t\u00e1c.<\/li>\n<\/ul>\n

            V\u00ed d\u1ee5, m\u1ed9t h\u1ec7 th\u1ed1ng an to\u00e0n c\u00f3 th\u1ec3 y\u00eau c\u1ea7u van ph\u1ea3i \u0111\u00f3ng trong v\u00f2ng 200 mili gi\u00e2y k\u1ec3 t\u1eeb khi ph\u00e1t hi\u1ec7n s\u1ef1 gia t\u0103ng \u00e1p su\u1ea5t. \u0110i\u1ec1u n\u00e0y \u0111\u01b0\u1ee3c m\u00f4 h\u00ecnh h\u00f3a nh\u01b0 m\u1ed9t r\u00e0ng bu\u1ed9c th\u1eddi gian tr\u00ean thanh k\u00edch ho\u1ea1t c\u1ee7a b\u1ed9 \u0111i\u1ec1u khi\u1ec3n van. N\u1ebfu thanh n\u00e0y k\u00e9o d\u00e0i v\u01b0\u1ee3t qu\u00e1 m\u1ed1c 200ms, s\u01a1 \u0111\u1ed3 s\u1ebd cho th\u1ea5y vi ph\u1ea1m quy tr\u00ecnh an to\u00e0n.<\/p>\n

            \ud83d\udd04 Th\u1eddi gian so v\u1edbi Chu\u1ed7i: Ch\u1ecdn c\u00f4ng c\u1ee5 ph\u00f9 h\u1ee3p<\/h2>\n

            R\u1ea5t ph\u1ed5 bi\u1ebfn khi nh\u1ea7m l\u1eabn s\u01a1 \u0111\u1ed3 th\u1eddi gian v\u1edbi s\u01a1 \u0111\u1ed3 chu\u1ed7i. C\u1ea3 hai \u0111\u1ec1u x\u1eed l\u00fd v\u1ec1 t\u01b0\u01a1ng t\u00e1c, nh\u01b0ng tr\u1ecdng t\u00e2m c\u1ee7a ch\u00fang kh\u00e1c nhau \u0111\u00e1ng k\u1ec3. Hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u00fap tr\u00e1nh vi\u1ec7c s\u1eed d\u1ee5ng sai c\u00f4ng c\u1ee5 m\u00f4 h\u00ecnh h\u00f3a.<\/p>\n\n\n\n\n\n\n\n\n
            T\u00ednh n\u0103ng<\/th>\nS\u01a1 \u0111\u1ed3 Th\u1eddi gian UML<\/th>\nS\u01a1 \u0111\u1ed3 Th\u1ee9 t\u1ef1 UML<\/th>\n<\/tr>\n<\/thead>\n
            Tr\u1ecdng t\u00e2m ch\u00ednh<\/strong><\/td>\nTh\u1eddi l\u01b0\u1ee3ng th\u1eddi gian v\u00e0 c\u00e1c thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i.<\/td>\nTh\u1ee9 t\u1ef1 c\u00e1c tin nh\u1eafn v\u00e0 lu\u1ed3ng logic.<\/td>\n<\/tr>\n
            Tr\u1ee5c Th\u1eddi gian<\/strong><\/td>\nR\u00f5 r\u00e0ng (ngang ho\u1eb7c d\u1ecdc).<\/td>\nNg\u1ea7m \u0111\u1ecbnh (xu\u1ed1ng d\u01b0\u1edbi).<\/td>\n<\/tr>\n
            \u0110\u1ed3ng th\u1eddi<\/strong><\/td>\nHi\u1ec3n th\u1ecb r\u00f5 r\u00e0ng c\u00e1c quy tr\u00ecnh song song.<\/td>\nBi\u1ec3u di\u1ec5n tuy\u1ebfn t\u00ednh cho c\u00e1c l\u1eddi g\u1ecdi.<\/td>\n<\/tr>\n
            M\u1ee9c \u0111\u1ed9 chi ti\u1ebft<\/strong><\/td>\n\u0110\u1ecbnh l\u01b0\u1ee3ng (L\u00e2u bao l\u00e2u?).<\/td>\n\u0110\u1ecbnh t\u00ednh (\u0110i\u1ec1u g\u00ec x\u1ea3y ra?).<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

            S\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 khi x\u00e1c \u0111\u1ecbnh lu\u1ed3ng logic c\u1ee7a m\u1ed9t t\u00ednh n\u0103ng. S\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 th\u1eddi gian khi x\u00e1c minh hi\u1ec7u su\u1ea5t, \u0111\u1ed9 tr\u1ec5 ho\u1eb7c \u0111\u1ed3ng b\u1ed9 gi\u1eefa c\u00e1c th\u00e0nh ph\u1ea7n. Th\u01b0\u1eddng xuy\u00ean, m\u1ed9t d\u1ef1 \u00e1n s\u1ebd s\u1eed d\u1ee5ng c\u1ea3 hai: s\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 x\u00e1c \u0111\u1ecbnh logic, c\u00f2n s\u01a1 \u0111\u1ed3 th\u1eddi gian x\u00e1c minh hi\u1ec7u su\u1ea5t c\u1ee7a logic \u0111\u00f3.<\/p>\n

            \ud83d\ude80 \u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf: T\u00ecnh hu\u1ed1ng m\u1ea1ng c\u1ea3m bi\u1ebfn<\/h2>\n

            \u0110\u1ec3 minh h\u1ecda c\u00e1c kh\u00e1i ni\u1ec7m n\u00e0y, h\u00e3y xem x\u00e9t m\u1ed9t t\u00ecnh hu\u1ed1ng li\u00ean quan \u0111\u1ebfn h\u1ec7 th\u1ed1ng gi\u00e1m s\u00e1t m\u00f4i tr\u01b0\u1eddng. H\u1ec7 th\u1ed1ng n\u00e0y bao g\u1ed3m m\u1ed9t N\u00fat C\u1ea3m bi\u1ebfn, m\u1ed9t C\u1ed5ng giao ti\u1ebfp v\u00e0 m\u1ed9t M\u00e1y ch\u1ee7 \u0111\u00e1m m\u00e2y.<\/p>\n

            \ud83d\udd39 B\u01b0\u1edbc 1: N\u00fat C\u1ea3m bi\u1ebfn<\/h3>\n

            N\u00fat C\u1ea3m bi\u1ebfn theo d\u00f5i nhi\u1ec7t \u0111\u1ed9. V\u00e0o th\u1eddi \u0111i\u1ec3m T=0, n\u00f3 th\u1ee9c d\u1eady. M\u1ed9t thanh k\u00edch ho\u1ea1t b\u1eaft \u0111\u1ea7u tr\u00ean \u0111\u01b0\u1eddng s\u1ed1ng c\u1ee7a N\u00fat C\u1ea3m bi\u1ebfn. N\u00f3 \u0111\u1ecdc d\u1eef li\u1ec7u, m\u1ea5t 50 mili gi\u00e2y. \u0110i\u1ec1u n\u00e0y \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n b\u1eb1ng m\u1ed9t thanh k\u00edch ho\u1ea1t ng\u1eafn.<\/p>\n

            \ud83d\udd39 B\u01b0\u1edbc 2: Truy\u1ec1n t\u1ea3i<\/h3>\n

            Sau khi \u0111\u1ecdc xong, N\u00fat C\u1ea3m bi\u1ebfn g\u1eedi m\u1ed9t t\u00edn hi\u1ec7u \u0111\u1ebfn C\u1ed5ng giao ti\u1ebfp. M\u1ed9t m\u0169i t\u00ean tin nh\u1eafn ch\u1ec9 t\u1eeb N\u00fat C\u1ea3m bi\u1ebfn \u0111\u1ebfn C\u1ed5ng giao ti\u1ebfp. Th\u1eddi gian truy\u1ec1n t\u1ea3i l\u00e0 100 mili gi\u00e2y. Trong kho\u1ea3ng th\u1eddi gian n\u00e0y, \u0111\u01b0\u1eddng s\u1ed1ng c\u1ee7a N\u00fat C\u1ea3m bi\u1ebfn v\u1eabn ho\u1ea1t \u0111\u1ed9ng, cho th\u1ea5y n\u00f3 \u0111ang ch\u1edd x\u00e1c nh\u1eadn.<\/p>\n

            \ud83d\udd39 B\u01b0\u1edbc 3: X\u1eed l\u00fd t\u1ea1i C\u1ed5ng giao ti\u1ebfp<\/h3>\n

            C\u1ed5ng giao ti\u1ebfp nh\u1eadn t\u00edn hi\u1ec7u. N\u00f3 th\u1ef1c hi\u1ec7n ki\u1ec3m tra ki\u1ec3m \u0111\u1ecbnh t\u1ed5ng. Thanh k\u00edch ho\u1ea1t n\u00e0y d\u00e0i h\u01a1n, cho th\u1ea5y x\u1eed l\u00fd ph\u1ee9c t\u1ea1p h\u01a1n. N\u1ebfu ki\u1ec3m tra ki\u1ec3m \u0111\u1ecbnh t\u1ed5ng th\u1ea5t b\u1ea1i, m\u1ed9t t\u00edn hi\u1ec7u h\u1ebft th\u1eddi gian s\u1ebd x\u1ea3y ra sau 5 gi\u00e2y, v\u00e0 tin nh\u1eafn s\u1ebd b\u1ecb lo\u1ea1i b\u1ecf.<\/p>\n

            \ud83d\udd39 B\u01b0\u1edbc 4: C\u1eadp nh\u1eadt l\u00ean \u0111\u00e1m m\u00e2y<\/h3>\n

            Cu\u1ed1i c\u00f9ng, C\u1ed5ng giao ti\u1ebfp g\u1eedi d\u1eef li\u1ec7u \u0111\u1ebfn M\u00e1y ch\u1ee7 \u0111\u00e1m m\u00e2y. M\u00e1y ch\u1ee7 \u0111\u00e1m m\u00e2y x\u1eed l\u00fd d\u1eef li\u1ec7u v\u00e0 g\u1eedi x\u00e1c nh\u1eadn tr\u1edf l\u1ea1i. Th\u1eddi gian v\u00f2ng quay t\u1ed5ng \u0111\u01b0\u1ee3c \u0111o tr\u00ean s\u01a1 \u0111\u1ed3. N\u1ebfu th\u1eddi gian t\u1ed5ng v\u01b0\u1ee3t qu\u00e1 2 gi\u00e2y, h\u1ec7 th\u1ed1ng s\u1ebd b\u1ecb \u0111\u00e1nh d\u1ea5u l\u00e0 qu\u00e1 ch\u1eadm \u0111\u1ec3 g\u1eedi c\u1ea3nh b\u00e1o th\u1eddi gian th\u1ef1c.<\/p>\n

            T\u00ecnh hu\u1ed1ng n\u00e0y minh h\u1ecda c\u00e1ch c\u00e1c thanh k\u00edch ho\u1ea1t v\u00e0 c\u00e1c s\u1ef1 ki\u1ec7n k\u00edch ho\u1ea1t ph\u1ed1i h\u1ee3p v\u1edbi nhau \u0111\u1ec3 t\u1ea1o n\u00ean b\u1ee9c tranh to\u00e0n di\u1ec7n v\u1ec1 hi\u1ec7u su\u1ea5t h\u1ec7 th\u1ed1ng. N\u00f3 v\u01b0\u1ee3t ra ngo\u00e0i c\u00e2u h\u1ecfi \u201cn\u00f3 c\u00f3 ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng?\u201d \u0111\u1ec3 chuy\u1ec3n sang \u201cn\u00f3 c\u00f3 ho\u1ea1t \u0111\u1ed9ng \u0111\u1ee7 nhanh kh\u00f4ng?\u201d<\/p>\n

            \u26a0\ufe0f Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn khi m\u00f4 h\u00ecnh h\u00f3a<\/h2>\n

            Vi\u1ec7c t\u1ea1o ra c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y l\u00e0 \u0111\u01a1n gi\u1ea3n, nh\u01b0ng vi\u1ec7c t\u1ea1o ra nh\u1eefng s\u01a1 \u0111\u1ed3 ch\u00ednh x\u00e1c \u0111\u00f2i h\u1ecfi s\u1ef1 k\u1ef7 lu\u1eadt. M\u1ed9t s\u1ed1 l\u1ed7i ph\u1ed5 bi\u1ebfn c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn hi\u1ec3u nh\u1ea7m v\u1ec1 h\u00e0nh vi c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n

              \n
            • B\u1ecf qua \u0111\u1ed9 tr\u1ec5:<\/strong> V\u1ebd c\u00e1c tin nh\u1eafn d\u01b0\u1edbi d\u1ea1ng \u0111\u01b0\u1eddng th\u1eb3ng t\u1ee9c th\u1eddi m\u00e0 kh\u00f4ng t\u00ednh \u0111\u1ebfn th\u1eddi gian truy\u1ec1n. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn c\u00e1c m\u00f4 h\u00ecnh l\u1ea1c quan, th\u1ea5t b\u1ea1i trong m\u00f4i tr\u01b0\u1eddng s\u1ea3n xu\u1ea5t.<\/li>\n
            • Qu\u00e1 t\u1ea3i:<\/strong>Ch\u00e8n qu\u00e1 nhi\u1ec1u \u0111\u01b0\u1eddng \u0111\u1eddi v\u00e0o m\u1ed9t khung h\u00ecnh duy nh\u1ea5t. \u0110i\u1ec1u n\u00e0y khi\u1ebfn vi\u1ec7c theo d\u00f5i c\u00e1c t\u01b0\u01a1ng t\u00e1c c\u1ee5 th\u1ec3 tr\u1edf n\u00ean b\u1ea5t kh\u1ea3 thi. Chia c\u00e1c s\u01a1 \u0111\u1ed3 th\u00e0nh c\u00e1c nh\u00f3m h\u1ee3p l\u00fd n\u1ebfu c\u1ea7n thi\u1ebft.<\/li>\n
            • Thang th\u1eddi gian kh\u00f4ng nh\u1ea5t qu\u00e1n:<\/strong>Tr\u1ed9n l\u1eabn c\u00e1c \u0111\u01a1n v\u1ecb kh\u00e1c nhau (v\u00ed d\u1ee5: gi\u00e2y v\u00e0 mili gi\u00e2y) m\u00e0 kh\u00f4ng c\u00f3 nh\u00e3n r\u00f5 r\u00e0ng. Lu\u00f4n x\u00e1c \u0111\u1ecbnh thang th\u1eddi gian m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng.<\/li>\n
            • Thi\u1ebfu c\u00e1c s\u1ef1 ki\u1ec7n h\u1ee7y b\u1ecf:<\/strong>Kh\u00f4ng hi\u1ec3n th\u1ecb th\u1eddi \u0111i\u1ec3m m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng b\u1ecb h\u1ee7y. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 ng\u1ee5 \u00fd r\u1eb1ng \u0111\u1ed1i t\u01b0\u1ee3ng t\u1ed3n t\u1ea1i m\u00e3i m\u00e3i, trong khi th\u1ef1c t\u1ebf n\u00f3 n\u00ean \u0111\u01b0\u1ee3c thu gom r\u00e1c ho\u1eb7c t\u1eaft ngu\u1ed3n.<\/li>\n
            • Nh\u1ea7m l\u1eabn lu\u1ed3ng \u0111i\u1ec1u khi\u1ec3n v\u1edbi lu\u1ed3ng d\u1eef li\u1ec7u:<\/strong>S\u1eed d\u1ee5ng c\u00e1c thanh k\u00edch ho\u1ea1t \u0111\u1ec3 bi\u1ec3u di\u1ec5n l\u01b0u tr\u1eef d\u1eef li\u1ec7u thay v\u00ec x\u1eed l\u00fd t\u00edch c\u1ef1c. C\u00e1c thanh k\u00edch ho\u1ea1t ch\u1ec9 n\u00ean \u0111\u1ea1i di\u1ec7n cho t\u00ednh to\u00e1n ho\u1eb7c th\u1ef1c thi \u0111ang ho\u1ea1t \u0111\u1ed9ng.<\/li>\n<\/ul>\n

              \ud83d\udcdd C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u00f5 r\u00e0ng<\/h2>\n

              \u0110\u1ec3 \u0111\u1ea3m b\u1ea3o s\u01a1 \u0111\u1ed3 c\u1ee7a b\u1ea1n l\u00e0 c\u00f4ng c\u1ee5 giao ti\u1ebfp hi\u1ec7u qu\u1ea3, h\u00e3y tu\u00e2n theo c\u00e1c h\u01b0\u1edbng d\u1eabn n\u00e0y.<\/p>\n

                \n
              • Ghi nh\u00e3n m\u1ecdi th\u1ee9:<\/strong>M\u1ed7i \u0111\u01b0\u1eddng \u0111\u1eddi, tin nh\u1eafn v\u00e0 r\u00e0ng bu\u1ed9c \u0111\u1ec1u ph\u1ea3i c\u00f3 nh\u00e3n r\u00f5 r\u00e0ng. S\u1ef1 m\u01a1 h\u1ed3 l\u00e0 k\u1ebb th\u00f9 c\u1ee7a t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt.<\/li>\n
              • S\u1eed d\u1ee5ng nh\u00f3m:<\/strong>N\u1ebfu b\u1ea1n c\u00f3 nhi\u1ec1u th\u00e0nh ph\u1ea7n, h\u00e3y nh\u00f3m ch\u00fang theo h\u1ec7 th\u1ed1ng con. \u0110i\u1ec1u n\u00e0y gi\u00fap gi\u1ea3m ti\u1ebfng \u1ed3n th\u1ecb gi\u00e1c.<\/li>\n
              • Nh\u1ea5n m\u1ea1nh c\u00e1c \u0111\u01b0\u1eddng \u0111i quan tr\u1ecdng:<\/strong>S\u1eed d\u1ee5ng c\u00e1c \u0111\u01b0\u1eddng \u0111\u1eadm ho\u1eb7c m\u00e0u s\u1eafc kh\u00e1c bi\u1ec7t (n\u1ebfu c\u00f4ng c\u1ee5 c\u1ee7a b\u1ea1n h\u1ed7 tr\u1ee3) \u0111\u1ec3 l\u00e0m n\u1ed5i b\u1eadt \u0111\u01b0\u1eddng \u0111i quan tr\u1ecdng quy\u1ebft \u0111\u1ecbnh \u0111\u1ed9 tr\u1ec5 t\u1ed5ng th\u1ec3 c\u1ee7a h\u1ec7 th\u1ed1ng.<\/li>\n
              • T\u00e0i li\u1ec7u c\u00e1c gi\u1ea3 \u0111\u1ecbnh:<\/strong>Th\u00eam ghi ch\u00fa v\u0103n b\u1ea3n gi\u1ea3i th\u00edch \u0111\u01a1n v\u1ecb th\u1eddi gian v\u00e0 b\u1ea5t k\u1ef3 gi\u1ea3 \u0111\u1ecbnh n\u00e0o v\u1ec1 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh m\u1ea1ng ho\u1eb7c t\u1ed1c \u0111\u1ed9 ph\u1ea7n c\u1ee9ng.<\/li>\n
              • Xem x\u00e9t theo t\u1eebng b\u01b0\u1edbc:<\/strong>C\u00e1c m\u00f4 h\u00ecnh th\u1eddi gian thay \u0111\u1ed5i theo s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a h\u1ec7 th\u1ed1ng. Xem l\u1ea1i s\u01a1 \u0111\u1ed3 khi y\u00eau c\u1ea7u hi\u1ec7u su\u1ea5t thay \u0111\u1ed5i.<\/li>\n<\/ul>\n

                \ud83e\udde9 T\u00edch h\u1ee3p v\u1edbi m\u00e1y tr\u1ea1ng th\u00e1i<\/h2>\n

                S\u01a1 \u0111\u1ed3 th\u1eddi gian th\u01b0\u1eddng b\u1ed5 sung cho s\u01a1 \u0111\u1ed3 m\u00e1y tr\u1ea1ng th\u00e1i. Trong khi m\u00e1y tr\u1ea1ng th\u00e1i m\u00f4 t\u1ea3 c\u00e1c tr\u1ea1ng th\u00e1i r\u1eddi r\u1ea1c c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng, s\u01a1 \u0111\u1ed3 th\u1eddi gian m\u00f4 t\u1ea3 h\u00e0nh vi theo th\u1eddi gian c\u1ee7a c\u00e1c chuy\u1ec3n ti\u1ebfp gi\u1eefa c\u00e1c tr\u1ea1ng th\u00e1i \u0111\u00f3.<\/p>\n

                V\u00ed d\u1ee5, m\u1ed9t m\u00e1y tr\u1ea1ng th\u00e1i c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecb chuy\u1ec3n ti\u1ebfp t\u1eeb \u201cNg\u01b0ng ho\u1ea1t \u0111\u1ed9ng\u201d sang \u201c\u0110ang ho\u1ea1t \u0111\u1ed9ng\u201d. S\u01a1 \u0111\u1ed3 th\u1eddi gian x\u00e1c \u0111\u1ecbnh tr\u1ea1ng th\u00e1i \u201c\u0110ang ho\u1ea1t \u0111\u1ed9ng\u201d k\u00e9o d\u00e0i bao l\u00e2u tr\u01b0\u1edbc khi \u0111\u1ed1i t\u01b0\u1ee3ng quay tr\u1edf l\u1ea1i \u201cNg\u01b0ng ho\u1ea1t \u0111\u1ed9ng\u201d. S\u1ef1 t\u00edch h\u1ee3p n\u00e0y cung c\u1ea5p c\u00e1i nh\u00ecn to\u00e0n di\u1ec7n v\u1ec1 c\u1ea3 tr\u1ea1ng th\u00e1i logic v\u00e0 c\u00e1c r\u00e0ng bu\u1ed9c theo th\u1eddi gian. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch trong c\u00e1c h\u1ec7 th\u1ed1ng nh\u00fang, n\u01a1i m\u1ed9t th\u1eddi gian ch\u1edd v\u01b0\u1ee3t qu\u00e1 trong m\u1ed9t tr\u1ea1ng th\u00e1i c\u1ee5 th\u1ec3 c\u00f3 th\u1ec3 k\u00edch ho\u1ea1t vi\u1ec7c kh\u1edfi \u0111\u1ed9ng l\u1ea1i ho\u1eb7c c\u01a1 ch\u1ebf d\u1ef1 ph\u00f2ng.<\/p>\n

                \ud83d\udd0d Ph\u00e2n t\u00edch c\u00e1c \u0111i\u1ec3m ngh\u1ebdn hi\u1ec7u su\u1ea5t<\/h2>\n

                M\u1ed9t trong nh\u1eefng k\u1ebft qu\u1ea3 qu\u00fd gi\u00e1 nh\u1ea5t c\u1ee7a s\u01a1 \u0111\u1ed3 th\u1eddi gian l\u00e0 vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111i\u1ec3m ngh\u1ebdn. B\u1eb1ng c\u00e1ch quan s\u00e1t tr\u1ef1c quan c\u00e1c thanh k\u00edch ho\u1ea1t, b\u1ea1n c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n n\u01a1i th\u1eddi gian \u0111ang \u0111\u01b0\u1ee3c ti\u00eau t\u1ed1n.<\/p>\n

                  \n
                • C\u00e1c thanh k\u00edch ho\u1ea1t d\u00e0i:<\/strong>Ch\u1ec9 ra vi\u1ec7c x\u1eed l\u00fd n\u1eb7ng ho\u1eb7c c\u00e1c thu\u1eadt to\u00e1n ph\u1ee9c t\u1ea1p c\u00f3 th\u1ec3 c\u1ea7n \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a.<\/li>\n
                • Kho\u1ea3ng tr\u1ed1ng l\u1edbn:<\/strong>Ch\u1ec9 ra c\u00e1c kho\u1ea3ng th\u1eddi gian ch\u1edd, \u0111\u1ed9 tr\u1ec5 truy\u1ec1n th\u00f4ng ho\u1eb7c xung \u0111\u1ed9t t\u00e0i nguy\u00ean.<\/li>\n
                • C\u00e1c thanh ch\u1ed3ng ch\u00e9o:<\/strong>Ch\u1ec9 ra c\u00e1c v\u1ea5n \u0111\u1ec1 \u0111\u1ed3ng th\u1eddi ti\u1ec1m \u1ea9n ho\u1eb7c \u0111i\u1ec1u ki\u1ec7n c\u1ea1nh tranh n\u1ebfu t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c chia s\u1ebb.<\/li>\n<\/ul>\n

                  C\u00e1c k\u1ef9 s\u01b0 s\u1eed d\u1ee5ng d\u1eef li\u1ec7u n\u00e0y \u0111\u1ec3 t\u00e1i c\u1ea5u tr\u00fac m\u00e3 ngu\u1ed3n, t\u1ed1i \u01b0u giao th\u1ee9c m\u1ea1ng ho\u1eb7c n\u00e2ng c\u1ea5p ph\u1ea7n c\u1ee9ng. S\u01a1 \u0111\u1ed3 n\u00e0y \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t b\u1ea3n ki\u1ec3m to\u00e1n tr\u1ef1c quan v\u1ec1 t\u00ecnh tr\u1ea1ng th\u1eddi gian c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n

                  \ud83d\udcdc K\u1ebft lu\u1eadn v\u1ec1 m\u00f4 h\u00ecnh h\u00f3a th\u1eddi gian<\/h2>\n

                  Th\u00e0nh th\u1ea1o s\u01a1 \u0111\u1ed3 Th\u1eddi gian UML kh\u00f4ng ph\u1ea3i l\u00e0 vi\u1ec7c ghi nh\u1edb c\u00e1c k\u00fd hi\u1ec7u; m\u00e0 l\u00e0 hi\u1ec3u \u0111\u01b0\u1ee3c d\u00f2ng ch\u1ea3y th\u1eddi gian b\u00ean trong m\u1ed9t h\u1ec7 th\u1ed1ng. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng \u0111\u00fang c\u00e1c \u0111\u01b0\u1eddng s\u1ed1ng, thanh k\u00edch ho\u1ea1t v\u00e0 c\u00e1c s\u1ef1 ki\u1ec7n th\u1eddi gian, b\u1ea1n t\u1ea1o ra m\u1ed9t m\u00f4 h\u00ecnh n\u00f3i ng\u00f4n ng\u1eef c\u1ee7a ch\u00ednh th\u1eddi gian. S\u1ef1 ch\u00ednh x\u00e1c n\u00e0y l\u00e0 y\u1ebfu t\u1ed1 ph\u00e2n bi\u1ec7t thi\u1ebft k\u1ebf l\u00fd thuy\u1ebft v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ea7n m\u1ec1m v\u00e0 ph\u1ea7n c\u1ee9ng c\u00f3 th\u1ec3 tri\u1ec3n khai, \u0111\u00e1ng tin c\u1eady.<\/p>\n

                  H\u00e3y nh\u1edb r\u1eb1ng c\u00e1c s\u01a1 \u0111\u1ed3 l\u00e0 t\u00e0i li\u1ec7u s\u1ed1ng. Khi h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n ph\u00e1t tri\u1ec3n, hi\u1ec3u bi\u1ebft c\u1ee7a b\u1ea1n v\u1ec1 c\u00e1c \u0111\u1ed9ng l\u1ef1c th\u1eddi gian c\u1ee7a n\u00f3 c\u0169ng c\u1ea7n ph\u1ea3i ph\u00e1t tri\u1ec3n theo. H\u00e3y gi\u1eef cho m\u00f4 h\u00ecnh lu\u00f4n \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt, \u0111\u1ea3m b\u1ea3o c\u00e1c thang th\u1eddi gian ch\u00ednh x\u00e1c, v\u00e0 t\u1eadn d\u1ee5ng s\u1ee9c m\u1ea1nh tr\u1ef1c quan c\u1ee7a s\u01a1 \u0111\u1ed3 \u0111\u1ec3 d\u1eabn d\u1eaft \u0111\u1ed9i ng\u0169 c\u1ee7a b\u1ea1n \u0111\u1ebfn c\u00e1c gi\u1ea3i ph\u00e1p m\u1ea1nh m\u1ebd, th\u1eddi gian th\u1ef1c.<\/p>\n","protected":false},"excerpt":{"rendered":"

                  Trong b\u1ed1i c\u1ea3nh m\u00f4 h\u00ecnh h\u00f3a h\u1ec7 th\u1ed1ng, vi\u1ec7c tr\u1ef1c quan h\u00f3a h\u00e0nh vi ch\u1ec9 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh. Hi\u1ec3u r\u00f5khith\u1eddi \u0111i\u1ec3m h\u00e0nh vi \u0111\u00f3 x\u1ea3y ra l\u00e0…<\/p>\n","protected":false},"author":1,"featured_media":547,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"Kh\u00e1m ph\u00e1 s\u00e2u v\u1ec1 s\u01a1 \u0111\u1ed3 Th\u1eddi gian UML: Thanh k\u00edch ho\u1ea1t v\u00e0 \u0110\u01b0\u1eddng s\u1ed1ng \u23f1\ufe0f","_yoast_wpseo_metadesc":"H\u1ecdc c\u00e1ch m\u00f4 h\u00ecnh h\u00f3a h\u00e0nh vi h\u1ec7 th\u1ed1ng theo th\u1eddi gian. 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