📄 ʦ+
字号:
=CB=CE=CC=E5">=D3=E8=D2=D4=CC=D4=CC=AD=A1=A3</SPAN> </P>
<P class=3DMsoNormal><IMG height=3D151=20
src=3D"http://210.38.192.101/os/jiaoxue/touying/image/4-25.GIF" =
width=3D484=20
border=3D0></P><SPAN lang=3DEN-US> </SPAN>=A1=A1
<P></P>
<P class=3DMsoNormal style=3D"TEXT-INDENT: 120.75pt"><SPAN=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">=CD=BC</SPAN><SPAN lang=3DEN-US> =
4-25 </SPAN><SPAN=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">=C0=FB=D3=C3=D7=EE=BC=D1<B=20
style=3D"COLOR: black; BACKGROUND-COLOR: =
#ffff66">=D2=B3=C3=E6=D6=C3=BB=BB=CB=E3=B7=A8</B>=CA=B1=B5=C4=D6=C3=BB=BB=
=CD=BC</SPAN><SPAN=20
lang=3DEN-US> </SPAN></P>
<P class=3DMsoNormal style=3D"TEXT-INDENT: 21.1pt">=A1=A1</P>
<P class=3DMsoNormal style=3D"TEXT-INDENT: 21.1pt">=A1=A1</P>
<P class=3DMsoNormal style=3D"TEXT-INDENT: 21.1pt"><B><SPAN =
lang=3DEN-US>2.=20
</SPAN><SPAN style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=CF=C8=BD=F8=CF=C8=B3=F6</SPAN><SPAN=20
lang=3DEN-US>(FIFO)</SPAN><SPAN style=3D"FONT-FAMILY: =CB=CE=CC=E5"><B=20
style=3D"COLOR: black; BACKGROUND-COLOR: =
#ffff66">=D2=B3=C3=E6=D6=C3=BB=BB=CB=E3=B7=A8</B></SPAN></B></P>
<P class=3DMsoNormal style=3D"TEXT-INDENT: 21pt"><IMG height=3D157=20
src=3D"http://210.38.192.101/os/jiaoxue/touying/image/4-26.GIF" =
width=3D501=20
border=3D0></P><SPAN lang=3DEN-US> </SPAN>=A1=A1
<P></P>
<P class=3DMsoNormal><SPAN=20
lang=3DEN-US> =
&=
nbsp; &n=
bsp; =20
</SPAN><SPAN style=3D"FONT-FAMILY: =CB=CE=CC=E5">=CD=BC</SPAN><SPAN =
lang=3DEN-US> 4-26 </SPAN><SPAN=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">=C0=FB=D3=C3</SPAN><SPAN =
lang=3DEN-US>FIFO</SPAN><SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=D6=C3=BB=BB=CB=E3=B7=A8=CA=B1=B5=C4=D6=C3=BB=BB=CD=BC</SPA=
N><SPAN lang=3DEN-US> </SPAN></P>
<P class=3DMsoNormal>=A1=A1</P>
<P class=3DMsoNormal>=A1=A1</P>
<P class=3DMsoNormal><B><SPAN lang=3DEN-US>4.7.2 </SPAN><SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=D7=EE=BD=FC=D7=EE=BE=C3=CE=B4=CA=B9=D3=C3</SPAN><SPAN =
lang=3DEN-US>(LRU)</SPAN><SPAN=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">=D6=C3=BB=BB=CB=E3=B7=A8</SPAN><SPAN =
lang=3DEN-US> </SPAN></B></P>
<P class=3DMsoNormal><IMG height=3D128=20
src=3D"http://210.38.192.101/os/jiaoxue/touying/image/4-27.GIF" =
width=3D447=20
border=3D0></P>
<P class=3DMsoNormal><SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">  =
; =20
=CD=BC</SPAN><SPAN lang=3DEN-US> 4-27 LRU</SPAN><SPAN =
style=3D"FONT-FAMILY: =CB=CE=CC=E5"><B=20
style=3D"COLOR: black; BACKGROUND-COLOR: =
#ffff66">=D2=B3=C3=E6=D6=C3=BB=BB=CB=E3=B7=A8</B></SPAN><SPAN=20
lang=3DEN-US> </SPAN></P>
<P class=3DMsoNormal>=A1=A1</P>
<P class=3DMsoNormal>=A1=A1</P>
<P class=3DMsoNormal>=A1=A1</P>
<P class=3DMsoNormal><B><SPAN lang=3DEN-US>1. LRU(Least Recently =
Used)</SPAN><SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=D6=C3=BB=BB=CB=E3=B7=A8=B5=C4=C3=E8=CA=F6</SPAN> </B></P>
<P class=3DMsoNormal><SPAN=20
lang=3DEN-US> =
&=
nbsp; &n=
bsp; &nb=
sp;=20
</SPAN></P>
<P class=3DMsoNormal><B><SPAN lang=3DEN-US>2. LRU</SPAN><SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=D6=C3=BB=BB=CB=E3=B7=A8=B5=C4=D3=B2=BC=FE=D6=A7=B3=D6</SPA=
N> </B></P>
<P class=3DMsoNormal><B><SPAN lang=3DEN-US>1) </SPAN><SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=BC=C4=B4=E6=C6=F7=AA=A5</SPAN></B></P>
<P class=3DMsoNormal><SPAN =
lang=3DEN-US> =20
</SPAN><SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=CE=AA=C1=CB=BC=C7=C2=BC=C4=B3=BD=F8=B3=CC=D4=DA=C4=DA=B4=E6=
=D6=D0=B8=F7=D2=B3=B5=C4=CA=B9=D3=C3=C7=E9=BF=F6=A3=AC=D0=EB=CE=AA=C3=BF=B8=
=F6=D4=DA=C4=DA=B4=E6=D6=D0=B5=C4=D2=B3=C3=E6=C5=E4=D6=C3=D2=BB=B8=F6=D2=C6=
=CE=BB=BC=C4=B4=E6=C6=F7=A3=AC=BF=C9=B1=ED=CA=BE=CE=AA</SPAN> </P>
<P class=3DMsoNormal><SPAN lang=3DEN-US>R=3DRn-1Rn-2Rn-3 =A1=AD R2R1R0 =
</SPAN></P>
<P class=3DMsoNormal><SPAN lang=3DEN-US><IMG height=3D250=20
src=3D"http://210.38.192.101/os/jiaoxue/touying/image/4-28.GIF" =
width=3D499=20
border=3D0></SPAN></P>
<P class=3DMsoNormal><SPAN lang=3DEN-US></SPAN> </P>
<P class=3DMsoNormal><SPAN=20
lang=3DEN-US> =
&=
nbsp; &n=
bsp; =20
</SPAN><SPAN style=3D"FONT-FAMILY: =CB=CE=CC=E5">=CD=BC</SPAN><SPAN =
lang=3DEN-US> 4-28 </SPAN><SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=C4=B3=BD=F8=B3=CC=BE=DF=D3=D0</SPAN><SPAN =
lang=3DEN-US>8</SPAN><SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=B8=F6=D2=B3=C3=E6=CA=B1=B5=C4</SPAN><SPAN =
lang=3DEN-US>LRU</SPAN><SPAN=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">=B7=C3=CE=CA=C7=E9=BF=F6</SPAN><SPAN =
lang=3DEN-US> </SPAN></P>
<P class=3DMsoNormal><B><SPAN lang=3DEN-US>2) </SPAN><SPAN=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">=D5=BB</SPAN><SPAN lang=3DEN-US> =
</SPAN></B></P>
<P class=3DMsoNormal><IMG height=3D114=20
src=3D"http://210.38.192.101/os/jiaoxue/touying/image/4-29.GIF" =
width=3D325=20
border=3D0></P><SPAN lang=3DEN-US> </SPAN>=A1=A1
<P></P>
<P class=3DMsoNormal><SPAN=20
lang=3DEN-US> =
&=
nbsp; =20
</SPAN><SPAN style=3D"FONT-FAMILY: =CB=CE=CC=E5">=CD=BC</SPAN><SPAN =
lang=3DEN-US> 4-29 </SPAN><SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=D3=C3=D5=BB=B1=A3=B4=E6=B5=B1=C7=B0=CA=B9=D3=C3=D2=B3=C3=E6=
=CA=B1=D5=BB=B5=C4=B1=E4=BB=AF=C7=E9=BF=F6</SPAN><SPAN lang=3DEN-US> =
</SPAN></P>
<P class=3DMsoNormal><B><SPAN lang=3DEN-US>4.7.3 Clock</SPAN><SPAN =
style=3D"FONT-FAMILY: =CB=CE=CC=E5">=D6=C3=BB=BB=CB=E3=B7=A8</SPAN><SPAN =
lang=3DEN-US> </SPAN></B></P>
<P class=3DMsoNormal><B><SPAN lang=3DEN-US>1. </SPAN><SPAN=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">=BC=F2=B5=A5=B5=C4</SPAN><SPAN =
lang=3DEN-US>Clock</SPAN><SPAN=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">=D6=C3=BB=BB=CB=E3=B7=A8</SPAN> =
</B></P>
<P class=3DMsoNormal><IMG height=3D271=20
src=3D"http://210.38.192.101/os/jiaoxue/touying/image/4-30.GIF" =
width=3D529=20
border=3D0></P><SPAN lang=3DEN-US> </SPAN>=A1=A1
<P></P>
<P class=3DMsoNormal><SPAN=20
lang=3DEN-US> =
&=
nbsp; &n=
bsp; =20
</SPAN><SPAN style=3D"FONT-FAMILY: =CB=CE=CC=E5">=CD=BC</SPAN><SPAN =
lang=3DEN-US> 4-30 </SPAN><SPAN=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">=BC=F2=B5=A5</SPAN><SPAN =
lang=3DEN-US>Clock</SPAN><SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=D6=C3=BB=BB=CB=E3=B7=A8=B5=C4=C1=F7=B3=CC=BA=CD=CA=BE=C0=FD=
</SPAN><SPAN lang=3DEN-US> </SPAN></P>
<P class=3DMsoNormal><B><SPAN lang=3DEN-US>2. </SPAN><SPAN=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">=B8=C4=BD=F8=D0=CD</SPAN><SPAN =
lang=3DEN-US>Clock</SPAN><SPAN=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">=D6=C3=BB=BB=CB=E3=B7=A8</SPAN> =
</B></P>
<P class=3DMsoNormal><SPAN style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=D3=C9=B7=C3=CE=CA=CE=BB</SPAN><SPAN=20
lang=3DEN-US>A</SPAN><SPAN style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=BA=CD=D0=DE=B8=C4=CE=BB</SPAN><SPAN=20
lang=3DEN-US>M</SPAN><SPAN style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=BF=C9=D2=D4=D7=E9=BA=CF=B3=C9=CF=C2=C3=E6=CB=C4=D6=D6=C0=E0=
=D0=CD=B5=C4=D2=B3=C3=E6=A3=BA</SPAN></P>
<P class=3DMsoNormal><SPAN =
lang=3DEN-US> =20
1</SPAN><SPAN style=3D"FONT-FAMILY: =CB=CE=CC=E5">=C0=E0</SPAN><SPAN =
lang=3DEN-US>(A=3D0, M=3D0):=20
</SPAN><SPAN style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=B1=ED=CA=BE=B8=C3=D2=B3=D7=EE=BD=FC=BC=C8=CE=B4=B1=BB=B7=C3=
=CE=CA=A3=AC</SPAN> <SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=D3=D6=CE=B4=B1=BB=D0=DE=B8=C4=A3=AC</SPAN> <SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=CA=C7=D7=EE=BC=D1=CC=D4=CC=AD=D2=B3=A1=A3=AA=A5</SPAN></P>=
<P class=3DMsoNormal><SPAN =
lang=3DEN-US> =20
2</SPAN><SPAN style=3D"FONT-FAMILY: =CB=CE=CC=E5">=C0=E0</SPAN><SPAN =
lang=3DEN-US>(A=3D0,=20
M=3D1)</SPAN><SPAN style=3D"FONT-FAMILY: =CB=CE=CC=E5">=A3=BA</SPAN> =
<SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=B1=ED=CA=BE=B8=C3=D2=B3=D7=EE=BD=FC=CE=B4=B1=BB=B7=C3=CE=CA=
=A3=AC</SPAN> <SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=B5=AB=D2=D1=B1=BB=D0=DE=B8=C4=A3=AC</SPAN> <SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=B2=A2=B2=BB=CA=C7=BA=DC=BA=C3=B5=C4=CC=D4=CC=AD=D2=B3=A1=A3=
=AA=A5</SPAN></P>
<P class=3DMsoNormal><SPAN =
lang=3DEN-US> =20
3</SPAN><SPAN style=3D"FONT-FAMILY: =CB=CE=CC=E5">=C0=E0</SPAN><SPAN =
lang=3DEN-US>(A=3D1,=20
M=3D0)</SPAN><SPAN style=3D"FONT-FAMILY: =CB=CE=CC=E5">=A3=BA</SPAN> =
<SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=D7=EE=BD=FC=D2=D1=B1=BB=B7=C3=CE=CA=A3=AC</SPAN> <SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=B5=AB=CE=B4=B1=BB=D0=DE=B8=C4=A3=AC</SPAN> <SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=B8=C3=D2=B3=D3=D0=BF=C9=C4=DC=D4=D9=B1=BB=B7=C3=CE=CA=A1=A3=
=AA=A5</SPAN></P>
<P class=3DMsoNormal><SPAN =
lang=3DEN-US> =20
4</SPAN><SPAN style=3D"FONT-FAMILY: =CB=CE=CC=E5">=C0=E0</SPAN><SPAN =
lang=3DEN-US>(A=3D1, M=3D1):=20
</SPAN><SPAN style=3D"FONT-FAMILY: =
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