Hello, Setting the required frequency in /sys/devices/system/cpu/cpu*/cpufreq/scaling_setspeed should not be in gem5 sources files. It can be done in a program (written in C, shell script or any other language) and running under Linux in FS mode.
Regards Yahia 2015-04-15 16:55 GMT+02:00 Nimish Girdhar <nimi...@tamu.edu>: > Thanks Yahia for sharing that. > > Can you explain a bit more as I don't have much experience with that. > > Let's say I have some algo to decide the cpu freq in gem5 > SRC/CPU/O3/commit_impl.hh... How can I set the file you mentioned to that > freq from here?? > > Thanks, > On Apr 15, 2015 2:53 AM, "Yahia Benmoussa" <yahia.benmou...@gmail.com> > wrote: > >> Hello, >> >> You have to enable userspace governor in your kernel then you can scale >> the CPU frequency by setting >> /sys/devices/system/cpu/cpu*/cpufreq/scaling_setspeed file. It should work. >> >> Regards. >> Yahia >> >> >> 2015-04-15 4:00 GMT+02:00 Nimish Girdhar <nimi...@tamu.edu>: >> >>> Hello all, >>> >>> I am working on a project where I have to use DVFS to change the >>> frequency of cores based on my evaluation of some counters that I inserted >>> in the gem5 o3 cpu src code. >>> >>> I followed the guidelines given on >>> http://www.m5sim.org/Running_gem5#Experimenting_with_DVFS . >>> But with these steps, the kernel will be the one who decides the >>> performance levels of the cores at different point of time. But in my case >>> I want to decide the levels based on some counters as mentioned above. >>> >>> Has anybody tried anything similar to that? I want to know how can I >>> access and update the dvfs handler registers from within the cpu src code. >>> >>> Any help will be appreciated. >>> >>> Thanks, >>> >>> -- >>> Warm regards >>> Nimish Girdhar >>> Department of Electrical and Computer Engineering >>> Texas A&M University >>> >>> _______________________________________________ >>> gem5-users mailing list >>> gem5-users@gem5.org >>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >>> >> >> >> _______________________________________________ >> gem5-users mailing list >> gem5-users@gem5.org >> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >> > > _______________________________________________ > gem5-users mailing list > gem5-users@gem5.org > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >
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