dear imran, sim works very slow as compared to real-time, that 2 in a fast PC which works in GHz., anywayz as regards 2 clock, in profiler just mention clock cycle time as 1.667ns or whatever u approximate 1/600MHz as..., also this gives only an near approximate of cpu cycles. cud be 95% accurate. anywayz as a thumb rule use [clock cycle read]/0.95 to get a more realistic value. U don hav 2 mention read and write access time separately. just the 1/600MHz value. don worry real-time world is much faster yet u face realistic issues compared 2 small sim related issue. b.o.l. for ur coding cya, tirthrulz....... --- Imran Akthar <> wrote: > Hi there, > I m using DM642 simulator,600MHz,CCS ver > 2.2,WINDOWS 2000 OS. > I have a algorithmn and i want to check the time > taken by it. > I m using clock() function and getting the result > as number of > cycles taken by the algorithmn. > what i have done is > in the PROFILER->CLOCK SETUP,time taken by CPU > cycles as 1.67 ns. > Pipe line adjustments as 0(default) > my algoritmn uses lot of memory read and write > operations,that too > external memory(in the linker file,i have used SDRAM > space for .sysmem > (heap)). > my question is > 1)do i need to specify the time taken for memory > read and write > in PROFILER ->CLOCK SETUP(by default ,its 0 ns). > 2)regarding the clock() function,is the cycles > it returns is of > my PC or the DSP simulator which m using. > also,since the return value of clock() function > is in cycles,its > mentioned to use CLOCK_PER_SEC to get the time in > sec.whats the value > of CLOCK_PER_SEC(is it the clock freq. of the dsp > board,in my case m > using simultor having a freq of 600 MHz??). > 3)also,while using the simulator,its taking lot > of time,for > example,during one process,it took approximately 10 > minutes of my PC > time,but the simulator results in cycles was a value > less that <600 > MHz,taht means ..it takes less that 1 sec time,when > i want to > calculate in terms of seconds.?? > if m right,then ,y the simulator takes so long > time,?? > and what when the algo,is put into the > BOARD,will it give the > same result in terms of cycle and hence less than 1 > sec??or will it > take time as was taken by my PC..that is 10 > minutes..?? > hope my questions are clear..?? > > well..m new to this CCS studio..so need help.. > > thanks > > MA IMRAN > ------------------------ Yahoo! Groups Sponsor > > _____________________________________ > Note: If you do a simple "reply" with your email > client, only the author of this message will receive > your answer. You need to do a "reply all" if you > want your answer to be distributed to the entire > group. > > _____________________________________ > About this discussion group: > > To Join: > > To Post: > > To Leave: > > Archives: http://www.yahoogroups.com/group/code-comp > > More Groups: http://www.dsprelated.com > > Yahoo! Groups Links > ________________________________________________________________________ Yahoo! Messenger - Communicate instantly..."Ping" your friends today! Download Messenger Now http://uk.messenger.yahoo.com/download/index.html |