On Mon, Aug 12, 2013 at 9:29 PM, Jia Zhan <[email protected]> wrote:
> Hi Paul, > > I am sorry but I don't quite get it. How do I assure the applications are > using the extra cores? > > FYI, here is what I used in the command line to run blackscholes with 4 > cores: > > %./build/ALPHA_FS/gem5.opt configs/example/ruby_fs.py > --script=./PARSEC/4-core/blackscholes/blackscholes_4c_simsmall.rcS > --cpu-type=timing --caches --l2cache --num-cpus=4 --num-dirs=4 > --num-l2caches=4 --cpu-clock=1GHz --l1d_size=64kB --l1i_size=64kB > --l1d_assoc=2 --l1i_assoc=2 --l2_size=4MB --l2_assoc=8 --cacheline_size=64 > --ruby --garnet-network=flexible --topology=Mesh --mesh-rows=2 > > Thanks, > > Jia > > > On Mon, Aug 12, 2013 at 9:00 PM, Paul Rosenfeld <[email protected]>wrote: > >> Are you certain that the applications are actually using the extra cores >> (i.e., are you setting flags for parsecmgmt like -n)? If a single thread >> runs on more simulated cores, I'd imagine that the runtime would be >> identical while the number of instructions would go up (due to idle threads >> running on the spare cores). >> >> >> On Mon, Aug 12, 2013 at 3:38 PM, Jia Zhan <[email protected]> wrote: >> >>> Hello, >>> >>> I am running a single benchmark with different number of cores to >>> observe the performance speedup. However I didn't see any reductions in >>> *sim_second*s when the number of cores increases from 1 to 16. Also, I >>> noticed that* sim_insts* (number of instructions simulated) also >>> increase as the number of cores increase. Isn't true that the number of >>> instructions should stay the same for a specific benchmark? >>> >>> Best, >>> Jia >>> >>> _______________________________________________ >>> 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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