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 >
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