Thanks, Jack! I am looking at it. Yuchen
On Thu, Mar 20, 2014 at 11:02 AM, Jack Harvard <[email protected]>wrote: > > http://stackoverflow.com/questions/21556051/how-to-use-aarch64-linux-gnu-objdump-to-disassemble-v7-mode-instructions-a32-t3should > help > > Jack Harvard > > > On Wed, Mar 19, 2014 at 2:41 PM, Yuchen Hou <[email protected]> wrote: > >> Hi Fernando, >> Thank you for your help. I will check rand(). When you said "the >> disassembled code", which code do you mean? >> >> Yuchen >> >> >> On Wed, Mar 19, 2014 at 1:44 AM, Fernando Endo >> <[email protected]>wrote: >> >>> Hello, >>> >>> I'm my opinion, you have to check what is done in the rand() function, >>> it may be completely integer. Usually, one should look at the disassembled >>> code to verify that gem5 stats are ok. >>> >>> Regards, >>> >>> -- >>> Fernando A. Endo, PhD student and researcher >>> >>> Université de Grenoble, UJF >>> France >>> >>> >>> >>> 2014-03-12 20:22 GMT+01:00 Yuchen Hou <[email protected]>: >>> >>>> Hi, >>>> I am using gem5 to profile a piece of C code but I am not sure if I am >>>> on the right track. >>>> >>>> I need to measure the numbers of alpha instructions executed in an >>>> experiment introduced by the following two lines C code: >>>> { >>>> r = (double)rand() / (double)RAND_MAX; // line 2 >>>> r = -log(r) / log(2.71828) / p; // line 3 >>>> } >>>> >>>> The way I setup the experiment is that I wrap the two lines like this: >>>> { >>>> m5_dumpreset_stats(0,0); /* add this before region of interest */ >>>> m5_checkpoint(0, 0); /* add this before region of interest */ >>>> r = (double)rand() / (double)RAND_MAX; >>>> r = -log(r) / log(2.71828) / p; >>>> m5_dumpreset_stats(0,0); /* add this after region of interest */ >>>> } >>>> , and then run a simulation with a run script in simple cpu, and rerun >>>> the simulation from the checkpoint with timing cpu. After that, I get these >>>> parameters out of stats.txt: >>>> ("system.switch_cpus.num_conditional_control_insts" >>>> "system.switch_cpus.num_int_insts" "system.switch_cpus.num_fp_insts" >>>> "system.switch_cpus.num_load_insts" "system.switch_cpus.num_store_insts"), >>>> with corresponding values is ( 2992 29902 263 6176 3159 ) >>>> >>>> Can anyone help me understand the reason of the huge number of >>>> instructions (especially integer instructions)? Is this experiment >>>> designed/conducted correctly at all? Thanks! >>>> >>>> >>>> Yuchen >>>> >>>> _______________________________________________ >>>> gem5-users mailing list >>>> [email protected] >>>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >>>> >>> >>> >>> _______________________________________________ >>> gem5-users mailing list >>> [email protected] >>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >>> >> >> >> _______________________________________________ >> gem5-users mailing list >> [email protected] >> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >> > > > _______________________________________________ > gem5-users mailing list > [email protected] > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >
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