SLIDE 1
strt r r r - - PowerPoint PPT Presentation
strt r r r - - PowerPoint PPT Presentation
strt r r r r r strt sr r r
SLIDE 2
SLIDE 3
❖✈❡r✈✐❡✇✿ ❉✐str✐❜✉t❡❞ s❤❛r❡❞ ♠❡♠♦r② ✕ ✷
❚r❛❞✐t✐♦♥❛❧ ✏s❡q✉❡♥t✐❛❧✑ ♠❡♠♦r② ❛t♦♠✐❝ r❡❛❞s ❛♥❞ ✇r✐t❡s r❡❛❞ r❡t✉r♥s ❧❛st ✇r✐t❡✬s ✈❛❧✉❡ ♣♦♦r ♣❡r❢♦r♠❛♥❝❡ ♦♥ ❞✐str✐❜✉t❡❞ ♣❧❛t❢♦r♠ ❉✐str✐❜✉t❡❞ ♠❡♠♦r② ❛❧❧♦✇ r❡❛❞s t♦ r❡t✉r♥ ❡❛r❧✐❡r ✈❛❧✉❡s ✐♠♣r♦✈❡❞ ♣❡r❢♦r♠❛♥❝❡✱ ❜✉t ✇❡❛❦❡r ❝♦rr❡❝t♥❡ss s❡q✉❡♥t✐❛❧✲❝♦♥s✐st❡♥❝②✿ ❡q✉✐✈❛❧❡♥t t♦ s❡q✉❡♥t✐❛❧ ✇rt ❝♦rr❡❝t♥❡ss r❡❧❡❛s❡ ❝♦♥s✐st❡♥❝②✿ ✇❡❛❦❡r t❤❛♥ s❡q✉❡♥t✐❛❧ · · · ❉❡✜♥❡ s❡q✉❡♥t✐❛❧❧②✲❝♦♥s✐st❡♥t ♠❡♠♦r② s❡r✈✐❝❡
DsmSeqConService ( ADDR, PNO, PVAL )
SLIDE 4
❉s♠❙❡q❈♦♥❙❡r✈✐❝❡ ✕ ✶
P❛r❛♠❡t❡rs
ADDR✿ ❛❞❞r❡ss❡s PNO✿ ♣❛❣❡ ♥✉♠❜❡rs PVAL✿ ♣♦ss✐❜❧❡ ✈❛❧✉❡s ♦❢ ❛ ♣❛❣❡
■♥♣✉t ❢✉♥❝t✐♦♥s ❛t ❛❞❞r j
j✳r❡❛❞(♣♥) ❛♥❞ j✳✇r✐t❡(♣♥✱ ♣✈)
▼❛✐♥ ❙❡q α ← []
// s❡q ♦❢ ✏✇r✐t❡✲❝❛❧❧✑ ❛♥❞ ✏r❡❛❞✲r❡t✑ ❡♥tr✐❡s [WCALL✱ j✱ ♣♥✱ ♣✈] // ✇r✐t❡✲❝❛❧❧ [RRET✱ j✱ ♣♥✱ ♣✈] // r❡❛❞✲r❡t
r❡t✉r♥ {vj ← sid()}
// ❛❝❝❡ss s②st❡♠ ❛t j
SLIDE 5
❉s♠❙❡q❈♦♥❙❡r✈✐❝❡ ✕ ✷
❇❡❧♦✇ h ✐s ❛ s❡q ♦❢ WCALL ❛♥❞ RRET ❡♥tr✐❡s ❍❡❧♣❡r ❢♥ lastWrite ( h, pn )
// ❧❛st ✈❛❧ ✇r✐tt❡♥ t♦ pn ✐♥ h
①❤ ← [ [ WCALL✱ · ✱ ♣♥✱ ✳ ] ✐♥ h ] r❡t✉r♥ xh.last.pv ❍❡❧♣❡r ❢♥ s❡q✉❡♥t✐❛❧ (❤)
// tr✉❡ ✐✛ ❡✈❡r② r❡❛❞ r❡t✉r♥s ❧❛st ✇r✐t❡
r❡t✉r♥ ❢♦r❛❧❧(i ✐♥ h✳❦❡②s✱ hi = [RRET✱ ✳ ✱♣♥✱ ♣✈]✿
hi = lastWrite( h0..i−1✱ ♣♥))
❍❡❧♣❡r ❢♥ s❡q❈♦♥s✐st❡♥t (❤) r❡t✉r♥ ❢♦rs♦♠❡( ❙❡q ①❤✿ s❡q✉❡♥t✐❛❧(①❤) ❛♥❞ ❢♦r❛❧❧(j✿ [[., j, ., .] ✐♥ ①❤] = [[., j, ., .] ✐♥ ❤]) )
SLIDE 6
❉s♠❙❡q❈♦♥❙❡r✈✐❝❡ ✕ ✸
vj.read(pn)
✐❝ { ♥♦ ♦♥❣♦✐♥❣ vj✳r❡❛❞(.) ♦r vj✳✇r✐t❡(.) } ♦✉t♣✉t pv ♦❝ { seqconsistent ( α◦ [[RRET
, j✱ ♣♥✱ ♣✈]])}
α✳❛♣♣❡♥❞([RRET
, j✱ ♣♥✱ ♣✈]
r❡t✉r♥ pv
vj.write(pn, pv)
✐❝ { ♥♦ ♦♥❣♦✐♥❣ vj✳r❡❛❞(.) ♦r vj✳✇r✐t❡(.) } α✳❛♣♣❡♥❞([RRET
, j✱ ♣♥✱ ♣✈]
♦❝ { tr✉❡ } r❡t✉r♥
SLIDE 7
❉s♠❙❡q❈♦♥❙❡r✈✐❝❡ ✕ ✹
❛t♦♠✐❝✐t② ❛ss✉♠♣t✐♦♥✿ ✐♥♣✉t ♣❛rts ❛♥❞ ♦✉t♣✉t ♣❛rts ♣r♦❣r❡ss ❛ss✉♠♣t✐♦♥✿ ♦♥❣♦✐♥❣ j✳r❡❛❞(.) ❧❡❛❞s✲t♦ ♥♦ ♦♥❣♦✐♥❣ j✳r❡❛❞(.) ♦♥❣♦✐♥❣ j✳✇r✐t❡(.) ❧❡❛❞s✲t♦ ♥♦ ♦♥❣♦✐♥❣ j✳✇r✐t❡(.)
SLIDE 8