<div><span><font face="맑은 고딕" size="2">공식만 알면 되는 쉬운 문제인 것 같긴한데, 확신이 없네여 ㅠ </font></span></div> <div><span><font face="맑은 고딕" size="2"></font></span> </div> <div><font face="맑은 고딕"><font size="2"><span>문제</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">.</span><span>아래 두가지 시스템에서 벤치마크프로그램을 돌렸을 때 결과입니다</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">.</span></font></font></div> <table style="border:.28pt solid rgb(0,0,0);border-collapse:collapse;"><tbody><tr><td style="padding:1.41pt 5.1pt;border:.28pt solid rgb(0,0,0);width:104.88pt;height:2.82pt;"> <div><span><font face="맑은 고딕" size="2">프로세서</font></span></div></td> <td style="padding:1.41pt 5.1pt;border:.28pt solid rgb(0,0,0);width:104.88pt;height:2.82pt;"> <div><span><font face="맑은 고딕" size="2">클록주파수</font></span></div></td> <td style="padding:1.41pt 5.1pt;border:.28pt solid rgb(0,0,0);width:104.88pt;height:2.82pt;"> <div><span><font face="맑은 고딕" size="2">성능</font></span></div></td> <td style="padding:1.41pt 5.1pt;border:.28pt solid rgb(0,0,0);width:104.88pt;height:2.82pt;"> <div><font face="맑은 고딕"><font size="2"><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">cpu</span><span>시간</span></font></font></div></td></tr><tr><td style="padding:1.41pt 5.1pt;border:.28pt solid rgb(0,0,0);width:104.88pt;height:2.82pt;"> <div><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';"><font face="맑은 고딕" size="2">A</font></span></div></td> <td style="padding:1.41pt 5.1pt;border:.28pt solid rgb(0,0,0);width:104.88pt;height:2.82pt;"> <div><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';"><font face="맑은 고딕" size="2">5MHz</font></span></div></td> <td style="padding:1.41pt 5.1pt;border:.28pt solid rgb(0,0,0);width:104.88pt;height:2.82pt;"> <div><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';"><font face="맑은 고딕" size="2">1 MPIS</font></span></div></td> <td style="padding:1.41pt 5.1pt;border:.28pt solid rgb(0,0,0);width:104.88pt;height:2.82pt;"> <div><font face="맑은 고딕"><font size="2"><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">12x</span><span>초</span></font></font></div></td></tr><tr><td style="padding:1.41pt 5.1pt;border:.28pt solid rgb(0,0,0);width:104.88pt;height:2.82pt;"> <div><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';"><font face="맑은 고딕" size="2">B</font></span></div></td> <td style="padding:1.41pt 5.1pt;border:.28pt solid rgb(0,0,0);width:104.88pt;height:2.82pt;"> <div><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';"><font face="맑은 고딕" size="2">25MHz</font></span></div></td> <td style="padding:1.41pt 5.1pt;border:.28pt solid rgb(0,0,0);width:104.88pt;height:2.82pt;"> <div><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';"><font face="맑은 고딕" size="2">18 MPIS</font></span></div></td> <td style="padding:1.41pt 5.1pt;border:.28pt solid rgb(0,0,0);width:104.88pt;height:2.82pt;"> <div><font face="맑은 고딕"><font size="2"><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">x</span><span>초</span></font></font></div></td></tr></tbody></table><div><font face="맑은 고딕"><font size="2"><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">'cpu</span><span>시간'은 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">A</span><span>가 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">B</span><span>보다 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">12</span><span>배의 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">CPU</span><span>시간이 더 필요하다는 것입니다</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">.</span></font></font></div> <div><font face="맑은 고딕"><font size="2"> </font></font><p></p></div> <div><font face="맑은 고딕"><font size="2"><span>여기서 문제는 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">‘</span><span>이 벤치마크 프로그램이 두 기계에서 처리되었을 때 기계코드의 명령어수의 상대크기는 얼마일까</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">?’</span><span>라는건데요</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">(</span><span>컴퓨터시스템구조론</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">(9</span><span>판</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">) 2</span><span>장 연습문제 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">2.12)</span></font></font></div> <div><font face="맑은 고딕"><font size="2"> </font></font><p></p></div> <div><font face="맑은 고딕"><font size="2"><span>클록주파수는 나와있는대로 </span> <span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">f</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';vertical-align:sub;">A </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">= 5*10</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';vertical-align:super;">6 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">, f</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';vertical-align:sub;">B </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">= 25*10</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';vertical-align:super;">6</span> <span lang="en-us" style="font-family:'함초롬바탕';"> 이고 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">MPIS </span><span>유도하는 식에의해서 계산하면 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">CPI</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';vertical-align:sub;">A </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">= 5 , CPI</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';vertical-align:sub;">B </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">= 1.39</span> <span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">(</span><span>셋째자리에서 반올림</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">).</span></font></font></div> <div><font face="맑은 고딕"><font size="2"><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">‘</span><span>기계코드의 명령어수의 상대크기</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">’</span><span>를 물어봤으니까</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">, </span><span>수행시간공식 </span> <span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">T = I</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';vertical-align:sub;">c</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">*CPI*</span><span style="letter-spacing:0pt;">τ</span> <span lang="en-us" style="font-family:'함초롬바탕';"> 여기에 좌변에 각각 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">12x</span><span>하고 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">x</span><span>넣고</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">, </span><span>우변에 각 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">CPI</span><span>하고 주파수 넣어서 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">x</span><span>에 대해 정리하고</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">, </span><span>등식으로 대입해서 풀면 </span> <span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">I</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';vertical-align:sub;">cB </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">= I</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';vertical-align:sub;">cA</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">*1.49</span> <span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">(</span><span>셋째자리에서 반올림</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">) </span><span>이렇게 나옵니다</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">.(확신이 없어용 ㅠ )</span></font></font></div> <div><font face="맑은 고딕"><font size="2"><span lang="en-us" style="font-family:'함초롬바탕';"> </span><span>제가 맞았다고 생각하면 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">‘</span><span>동시간에 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">B</span><span>가 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">A</span><span>보다 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">1.49</span><span>배의 명령어를 처리하므로</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">, A</span><span>에서의 벤치마크 프로그램의 명령어 수 크기는 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">B</span><span>에 비해 상대적으로 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">1.49</span><span>배 크다</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">’ </span><span>라고 하겠는데</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">, B</span><span>가 클록스피드는 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">5</span><span>배빠르고</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">, MPIS</span><span>지수는 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">18</span><span>배 높고</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">, </span><span>처리시간도 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">12</span><span>배 빠르고</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">, CPI</span><span>도 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">3</span><span>배나 적은데 명령어규모는 </span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">1.49</span><span>배라고 하니까</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">, </span><span>뭔가 틀린 것 같은거에요</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">.</span></font></font></div> <div><font face="맑은 고딕"><font size="2"><span lang="en-us" style="font-family:'함초롬바탕';"> </span><span>제가 문제를 잘못이해하고있거나</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">, </span><span>아니면 맞는데 이부분에 대한 내용을 잘 이해하지 못해서 틀린 느낌이 드는 것 같아</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">... </span><span>질문해봅니다</span><span lang="en-us" style="letter-spacing:0pt;font-family:'함초롬바탕';">.</span></font></font></div>
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