ocean-young
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1 SLIDES
130 VUES
10 LIKES

100

DESCRIPTION

t1. 100. t2. Lock-X(A). t3. Read(A). t4. A=A-30. Lock-X(A). t5. Write(A). 70. Wait. t6. Commit( 含 Unlock-X(A)). Read(A). A=A*2. t7. t8. 140. Write(A). t9. Commit( 含 Unlock-X(A)).

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  1. t1 100 t2 Lock-X(A) t3 Read(A) t4 A=A-30 Lock-X(A) t5 Write(A) 70 Wait t6 Commit(含Unlock-X(A)) Read(A) A=A*2 t7 t8 140 Write(A) t9 Commit(含Unlock-X(A))

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