资源描述：
《系统级编程_lab11》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、Lab11：MemoryMountainRequirementsPlatform:ThislabassumesthatyouareusingVisualC++undera32-bitversionofWindows,usingIntelPentiumorPentium-equivalentmachines.Theexactcompilerandplatformaremostlyunimportant,asthelabisreasonablyportable.GettoknowyourCacheTh
2、isplatformofIntelPentiummachineshasamemoryhierarchy,whichincludesmultilevelofCache,suchasL1cache,L2cache,andsometimesL3Cachemaybealsoexist.Youcanusethesometools,suchaseverest.exe,tofindoutthebasicinformationofCacheofthecomputersystem,whichyouareuings.
3、Forexample,tousingeverest.exe,justdouble-clicktorunit.Afteritmakessomeinformationcollection,itwillshowalltheinformationaboutyoucomputersysteminitsframe.Thefollowingisanexampleofitsmainframe.YoucanseetheinformationabouttheCache.Now,runeverest.exetofind
4、outtheinformationofyourcomputersystem’sCache,andfilltheblank.TypeSizeinbyteL1cache64KBL2cache2ML3cacheTheprojectofmemory_mountainPleasedownloadtheprojectofmemory_mountain.rarfirst.ThisprojectiftheWindows-versionofCMUCSAPPofmountain.c,whichyoucanfindin
5、lthetextbookchapter6.6(Notes:thisisthefirstversion),lorfromhttp://csapp.cs.cmu.edu/public/1e/public/code.html/mountain.c(Notes:thisisthefirstversion)lorfromhttp://csapp.cs.cmu.edu/public/code.html/mountain.c(Notes:thisisthefirstversion)YourTask1．Readt
6、hesourcecodeinmountain.cpp,andanswerthefollowingquestions:(Notes:youdon’thavetopaytoomuchattentiononthefunctionfcyc2())1)Whatisthevariableofsizeandstrideusedfor?size是工作集的大小，即操作的数组的总大小，size越小，得到的工作集越小，时间局部性也就越好。stride是步长，表示读取的两个元素之间的间隔，stride越小，得到的空间局部
7、性越好。步长stride的范围为1~16。1)Whatisthemeaningofthereturnvalueofthefunctionrun()?Run（）是一个封装函数，对于每个工作集大小size和步长stride的组合，它调用test（）函数，并返回测量出的读吞吐率，单位为MB/s。2．Ifnecessary,makesomechangetothevalueofMINBYTES,MAXBYTES,andMAXSTRIDE.3．Buildtheprojectandrunit,theyoucan
8、getanoutputfilenamedasout.txt.4．Copythedatainout.txtintoanExcelfile.Justasshowninthefollowingfigure.5．ClickanycellinthisExcelfile,thenaddachart.ThenclickFinish.5．Thenyoucangetafigurealikethis:6.ThefollowingtwofiguresarefromCSAPPe1andCSAPPe2Fig
