📄 中英对照多处理技术.htm
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<TD bgColor=#6595d6 height=25><IMG height=11
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style="COLOR: white"> 主题:中英对照:多处理技术</STRONG></TD></TR>
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<TD width=64>作 者</TD>
<TD width=233>ok101</TD>
<TD width=63>阅读次数</TD>
<TD width=85>379</TD>
<TD width=63>回复次数</TD>
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<TD width=64>所属栏目</TD>
<TD width=233>基础应用与新手入门>> IT英语</TD>
<TD width=63>发表日期</TD>
<TD width=85>2006-9-1</TD>
<TD width=63>回复日期</TD>
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width=85>2006-9-29</TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>
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<DIV class=userInfoBox>积分:2768<BR>第二级</DIV>
<DIV class=userInfoBox>注册时间<BR>2003-5-12</DIV></DIV></TD>
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<DIV class=TitleInfoBox align=right>发表时间:2006-9-1 9:48:38 楼主</DIV>
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<DIV id=cont_right style="WIDTH: 495px"> 1.Multiprocessing versus
Uniprocessing<BR><BR>A uniprocessor(UP)can accomplish parallelism inside
the processor itself.For example,the fixed point unit and the floating
point unit can run several instructions within the same CPU(central
processing unit)cycle.Power,Power2 and Power PC architectures have a very
high level of instruction parallelism.However,only one task at a time can
be processed.<BR><BR>Uniprocessor designs have built-in bottlenecks.The
address and data buses restrict data transfers to a one -at-a-time flow of
traffic.[1] The program counter forces instructions to be run in strict
sequence.Even if improvements in performance are achieved by means of
faster processors and more instruction parallelism,operations are still
run in strict sequence.However,in a uniprocessor,an increase in processor
speed is not the total answer because other factors,such as the system bus
and memory,come into play.[2]<BR><BR>Adding more processors seems to be a
good solution to increase the overall performance of a system.Having more
processors in the system increases the system throughput because the
system can perform more than one task at a time.However,the increase in
performance is not directly proportional to an increase in the number of
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