Impact of Dual Core on Object Oriented Programming Languages through UML

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1 Int. J. Advancd Ntworking and Applications 5 Volum:, Issu:, Pags: 5- (9) Impact of Dual Cor on Objct Orintd Programming Languags through UML Dr. Vipin Saxna Associat Profssor, Dpartmnt of Computr Scinc Babasasb Bhimrao Ambdkar Univrsity (Cntral Univrsity) Lucknow (U.P.), 65, INDIA vsax@rdiffmail.com Dpa Raj Assistant Profssor, Dpartmnt of Computr Scinc Babasasb Bhimrao Ambdkar Univrsity (Cntral Univrsity) Lucknow (U.P.), 65, INDIA - dpa_raj@yahoo.co.in ABSTRACT Nowadays, diffrnt kinds of procssors ar apparing in th computr markt, thrfor it is ncssary to obsrv th prformanc of ths procssors at th arly stag of computation of objct orintd programs. In this contxt, th prsnt papr dals with th valuation of th prformanc of Dual Cor and Cor Dual procssors architctur for th Objct Orintd Programming languags. Th main objctiv of this work is to propos th bst objct orintd programming languag for th softwar dvlopmnt on ths said procssors architctur. A wll known modling languag i.. Unifid Modling Languag (UML) is usd to dsign a prformanc orintd modl, consisting of UML class, UML squnc and UML activity diagrams. Exprimntal study is prformd by taking th two most popular objct orintd languags namly C++ and JAVA. Comparativ study is dpictd with th hlp of tabls and graphs. Kywords: UML, Activity diagram, C++, Dual cor, Cor dua Papr Submittd: Jun 9 Accptd: Oct Rlatd Work In th today s scnario, various rsarchrs ar dvloping th modls by th us of popular and powrful objct orintd modling languag i.. UML [5]. A lot of litratur is availabl on modling problms by th us of UML, but limits rsarch paprs ar availabl in litratur on applications of UML in th fild of Computr Architctur problms. By th us of UML, softwar and hardwar architctur problms can b asily rprsntd pictorially and prformanc can b judgd aftr modling of th problms. Complx rsarch problm can b asily solvd by dsigning th UML modls and prformanc of ths modls can b judgd by mssag passing tchniqu among th objcts. Ral tim systm through UML is dscribd by Slic and Rumbaugh []. Th first rprsntd of UML in th fild of tlcommunication sctor is dscribd by Holz [7]. This is on of th important paprs to slct th bst programming languag for distributd computing systm. Drozdowski [9] xplaind a tchniqu to find out th xcution tim for distributd application. In [5], tools and tchniqus for prformanc masurmnt of larg distributd multi agnt systm ar xplaind. A modling for architctur of Pntium IV is rportd by Alnn Hinton []. Th computr architctur modls which can b asily usd for th furthr rsarch work ar availabl in [6]. Wb basd application can also b judgd through UML and it is rportd in []. UML basd Vhicl control systm is also rportd in th litratur by Walthr t al. []. OMG is an important activ group for invnting th diffrnt vrsions of th UML. Th rsarch paprs on ths ar [,4] in which group dscribs th diffrnt typs of UML diagrams basd on XML Mta data spcification. Prformanc modling and prdiction tools for paralll and distributd programs ar dscribd by Planna t al. [8, ] and ths paprs also dscrib customizing th UML for modling prformanc orintd applications. Rcntly Saxna t al. [4] proposd th UML modl with prformanc valuation for th multiplx systm for th procsss which ar xcuting in th distributd computing nvironmnt. UML Modl of Instruction Piplin is also xplaind by Saxna & Raj [5] in which thy obsrvd th prformanc of objct orintd instructions xcuting in distributd computing nvironmnt. Java is an objct orintd platform indpndnt languag and many of th softwar dsigns ar codd with th hlp of th Java programming languag and on th othr hand C++ is also an objct orintd languag gnrally usd for softwar applications as wll as for systm programming. In th prsnt papr, th prformanc of ths two

2 Int. J. Advancd Ntworking and Applications 6 Volum:, Issu:, Pags: 5- (9) programming languags is obsrvd on th Dual Cor and Cor Dual procssor systm by proposing a modl through UML. Th main aim of this papr is to slct th bst Objct Orintd Programming languag for writing th softwar cods for long computations purpos which also savs th xcution tim. Th complt UML Diagram is dsignd for xcution of instructions of a program for dual cor procssor. UML class diagram, UML squnc diagram and UML activity diagram ar also givn in th papr and comparison is shown through tabls and graphs.. Background. UML Procss Dfinition Lt us first dfin th procss which may b th group or block of instructions of program, macro, sub programs and subroutins. For dfining th procss, thr is a nd of th procssing lmnt. Th procssing lmnt is dfind as a strotyp and gnrally usd to handl th concurrnt procss xcuting in th paralll and distributd nvironmnts. Th famous approach to handl th concurrnt procsss is Torus Topology. Th following Fig (a) shows th UML dfinition of procssing unit. Th UML Class Diagram of Procss is compltly dfind in Fig (b). Th instanc of th procss is dfind by th us of objct.xyz which is shown in Fig (c). Th st of th instancs of th class procss is modld by th us of multipl objcts which is also shown blow in Fig (d). Bas Class <<strotyp>> procssing_unit procss_id :intgr procss_typ :string procss_cardinality :intgr (a) Dfinition of Procssing Unit <<procssing_unit>> xyz.procss (c) Instanc of Class <<procssing_unit>> _.procss (d) Multipl Instancs of Objct Figur. UML Class Rprsntation of Procss and Procssing Unit In th abov figur procss shows th nam of multipl objcts.. Dual Cor Procssors In th today s scnario a diffrnt kinds of procssors ar apparing in th computr markt dsignd by th various hardwar companis. To incras th computing spd in rspct of singl cor procssors, dual cor procssors ar dsignd. Th dual cor is an architctur that rfrs to a cntral procssing unit (CPU) with two complt xcution cors in a singl procssor. Ths two cors, thirs cachs and cach controllr all ar built togthr on a singl intgratd circuit (IC). Prformanc of dual cor procssor is not doubl as compard to a singl cor procssor but it is significantly bttr than th singl cor procssor. Sinc thr ar two piplins, two instructions can b xcutd simultanously and two procssor cachs allow mor data on procssing unit for quick accss. Th dual cor block diagram is rprsntd in Figur which is currntly usd by most of softwar dvloprs du to its scalability and tim consuming. On th basis of this diagram, th comparativ spcifications of dual cor and cor duo procssors architctur ar rcordd in Tabl. <<procssing_unit>> CPU CORE L_ CACHE CPU CORE L_ CACHE procss_id : intgr procss_siz : intgr procss_in_tim : string procss_out_tim : string procss_priority : intgr procss_crat() procss_dlt() procss_updat() procss_join() procss_suspnd() procss_synchroniz() L_ CACHE Figur. Block Diagram of Dual Cor Procssor In a dual cor and cor duo, thr ar two CPU cors, on L_CACHE in ach cor on L_CACHE is shard by both th cors mountd on a singl chip. (b) Class Dfinition of Procss

3 Int. J. Advancd Ntworking and Applications 7 Volum:, Issu:, Pags: 5- (9) Tabl. Spcifications of Dual Cor and Cor Duo Procssor Architctur Spcification Dual Cor Cor Dua Itm Tchnology 45nm 45nm Cach MB L 6MB L Clock spd.7 GHz.GHz. Procssor No. E54 E86 Front sid Bus 8 MHz MHz :procss :cach :quu :dcod :xcut :ALU load dcod ftch ack Excut procs sav loa. UML Modling of Dual Cor Procssor Architctur. UML Class Modl Now lt us dsign UML Class modl and shown in Figur which consists of thirtn major classs namly procss, cach, L_cach, L_cach, I_cach, D_cach, ALU, Ftch, I_quu, Dcod, Excut, Branch. In this class diagram initially procss loads th instruction from mmory to both th L_cach and L_ cach. Ftch class ftchs th instruction from both L_cach to Piplin. If thr is L_cach miss thn ftch taks plac from L_cach. Dcodr is usd to dcod th instructions on by on and thn xcution taks plac by Excut class. ALU, Branch is a componnt of Excut class usd to xcut th instructions, Branch usd to chck th branch in th instructions. Sam procdur rpats for th nxt st of instructions. Figur 4. UML Squnc Diagram for Procss Excution for Dual Cor Procssor. UML Activity Diagram For th xcution of procsss on Dual Cor and Cor Duo procssor architctur, UML activity diagram for procss xcution is also dsignd and givn blow in Fig 5. This diagram shows th stps involvd in xcuting a procss undr both th procssors. Load Procss procs s cach Ftch procss L_cac L_cac h Dcod procss D_cach I_cach Ftc h I_cach I_quu D_cach Dcod Excut Excut Stor in D_Cach AL Branch Ys Anothr Procss Figur. UML Class Diagram for Procss Excution for Dual Cor Procssor. UML Squnc Diagram For Dual cor and Cor Duo procssors architctur, xcution squncs of instructions ar arrangd by mans of a UML squnc diagram as givn in Figur 4. In this diagram on can s that how mssag passing taks plac among th diffrnt objcts. This figur also shows that how long computation tim rprsntd through objct lif lin is rquird for xcution of instructions and arrangd for procss. Figur 5. UML Activity Diagram for Procss Excution for Dual Cor Procssor 4. Exprimntal Study and Rsults To chck th prformanc of th abov UML dsignd modl, a cas study is considrd by taking th squnc of instructions to b xcutd in th fiv run by taking avrag tchniqu. Sampl programs ar dsignd in C++ and JAVA by incrasing th squnc of instructions up to 5 lins of cod. Ths two objct No

4 Int. J. Advancd Ntworking and Applications 8 Volum:, Issu:, Pags: 5- (9) orintd softwar languags for xcuting a program of diffrnt sizs undr Dual Cor and Cor Duo procssor ar spcially considrd sinc most of th softwar companis ar dvloping th applications by writing softwar cods in ths objct orintd languags. Thrfor, w compar ths two objct orintd languags on rcntly usd procssor. This architctur systm is wll accptd by most of th softwar companis and most of th applications ar don on this architctur. A comparativ study of xcution of instructions for ths two objct-orintd softwar languags is obsrvd. Th xcution tim is incrasing for ths two programming languags as th sts of instructions ar incrasing. Th computd xcution timing in sconds for ths languags is givn in Tabls -. Tabl and ar prpard for Dual Cor and Cor Duo procssor architctur, rspctivly. From th tabls, It is obsrvd that JAVA is mor suitabl objct orintd languag in comparison of C++ as a numbr of instruction ar incrasing, th computation tim is much smallr in comparison of C++. It is happning for both th procssors architctur. Thrfor, JAVA programming languag is rcommndd for long computations. In th Tabl, avrag xcution tim is also rcordd for C++ and JAVA on both th Procssor s architctur as shown in Tabl and it is obsrvd that Cor Duo procssor architctur is bttr procssor architctur in comparison of Dual Cor procssor architctur sinc for both th programming languags, th computation tim is lowr. For gtting th quick intrprtation, th abov tabulatd data is also compild in th form of graph and rprsntd blow in Figurs 6 & 7 for Dual Cor and Cor Duo Procssors architctur, rspctivly. Excution tim in sconds 5 4 lins of cod C++ Java Excution Tim (in Sconds) 5 4 Lins of cod Figur- 7 Excution Tim of C++ and JAVA on Cor Dua Procssor Excution Tim(in sconds) Lins of cod C++ Java Dual cor cor dual Figur- 8 Excution tim of C++ on Dual Cor and Cor Dua Procssor Excution tim (in sconds) Lins of cod Dual cor cor dual Figur- 9 Excution tim of JAVA on Dual cor and Cor Dua Procssor Figur 6 Excution Tim of C++ and Java on Dual Cor Procssor

5 Int. J. Advancd Ntworking and Applications 9 Volum:, Issu:, Pags: 5- (9) Tabl : Excution Tim of C++ and Java on Dual Cor Procssor Architctur Lins of 4 5 Cod P/L C++ Java C++ Java C++ Java C++ Java C++ Java Excution Tim in Sconds Tabl. Excution Tim of C++ and Java on Cor Duo Procssor Architctur Lins of Cod 4 5 P/L C++ Java C++ Java C++ Java C++ Java C++ Java Excution Tim in Sconds Tabl 4: Comparison of Excution Tim of C++ & Java on Dual Cor and Cor Duo Procssors Lins of Cod 4 5 P/L C++ Java C++ Java C++ Java C++ Java C++ Java Dual Cor Procssor Cor Duo Procssor

6 Int. J. Advancd Ntworking and Applications Volum:, Issu:, Pags: 5- (9) 5. Concluding Rmarks From th abov work it is concludd that UML modling is a powrful modling languag to rprsnt softwar architctur and rsarch work visually. Prformanc of Dual Cor and Cor Duo procssors architctur for two most popular objct-orintd softwar languags by taking th variation in lins of cod, is obsrvd. It is concludd that Java programming languag taks lss xcution tim as compard to C++ for both th procssors. It is also found that Cor Duo Procssor is much fastr than th Dual Cor procssor architctur. Thrfor Cor Duo procssor is vry powrful and rcommndd for long computations rlatd to th Java objctorintd Programming languag. 6. Acknowldgmnts Authors ar vry thankful to Prof. B. Hanumaiah, Vic Chancllor, Babasahb Bhimrao Ambdkar Univrsity (A Cntral Univrsity), Vidya Vihar, Rai Barli Road, Lucknow, India, for providing th xcllnt computation facilitis in th Univrsity Campus. Thanks also du to th Univrsity Grant Commission, India for providing financial assistanc to th Univrsity for this Rsarch Work. Rfrncs []. J. Conalln,"Modling Wb Application Architcturs with UML", Communication of th ACM 4(), 6-7, (999). []. B. Slic, and J. Rumbaugh., "UML for Modling Complx Ral Tim Systms", Availabl Onlin Via Whitpaprs/.Jsp. []. OMG, Unifid Modling Languag Spcification, Availabl Onlin Via (). [4]. OMG, XML Mtadata Intrchang (XMI) Spcification, Availabl Onlin Via. (). [5] G. Booch, J. Rumbaugh, and I. Jacobson, "Th Unifid Modling Languag Usr Guid ", Addison Wsly, Rading, MA (999). [6]. K. Hwang. "Advancd Computr Architctur", McGraw Hill Sris in Computr Enginring, Inc Publishing, (99). [7] E. Holz. "Application of UML within th Scop of Nw Tlcommunication Architcturs", In GROOM Workshop on UML, Mannhim : Physicavrlag, (997). [8]. S. Pllana and T. Fahringr, "UML basd Modling Prformanc Orintd Applications in <<UML>>",Modl Enginring Concpts and Tools, Springr-Vrlag., Drsdn, Grmany, (). [9]. M. Drozowski, Estimating Excution Tim of Distributd Application, Paralll Procssing and Applid Mathmatics: 4th Intrnational confrnc PPAM, LNCS 8, Springr Vrlag, pp 7-4, (). []. A. Hlsingr, R. Lazarus, W. Wright & J. Zinnky, Tools and Tchniqus for rformanc Masurmnt of Larg Distributd Multi Agnt Systm", Procdings of AAMAS Confrnc, Australia. p (). []. H. Alln, Microarchitctur of Pntium IV procssor, Dsktop Platform Group, Intl Corporation []. M. Walthr, J. Schirmr, P.T. Flors, A. Lapp, T. Brtram and J. Ptrson, "Intgration of th Ordring Concpt for Vhicl Control Systm CARTRONIC into th Softwar Dvlopmnt Procss using UML Modling Mthods", In SAI World Congrss Dtroit, Michigan, USA, (). []. S. Pllana, and T. Fahringr, "UML basd Modling of Prformanc Orintd Applications", Wintr Simulation Confrnc (). [4].V. Saxna, D. Arora and S. Ahmad, "Objct Orintd Distributd Architctur Systm through UML". IEEE Intrnational Confrnc procdings on Advancd in Computr Vision and Information Tchnology, Novmbr 8- (Sponsord by IEEE Transactions, U.S.A.), 5-, ISBN: (7). [5]. V. Saxna, D. Raj, " UML Modling for Instruction Piplin Dsign, Intrnational Confrnc on Softwar Enginring 8,organizd by from Aug. 9-, Spt., pp. 9-96, SINGAPORE (8).