Hi Somnath, I am not an expert on how the ARM systems are configured, so I don't really know what is going on here. My advice would be to carefully trace through the configuration scripts so you can reason about how the system is configured.
The clusters may also be affected by the kernel and dtb files. I'm not sure how ARM systems are initialized. Jason On Tue, Mar 14, 2017, 4:51 AM Mukherjee, Somnath <[email protected]> wrote: > I did some experiment with the num-cpu and num-cluster command and it > appears to me this is not implemented for more than –num-cpu = 2. > > > > Jason, > > Is it possible for you to check the below result once and confirm that? > > Is there a way it can be fixed? > > > > > > *--num-cpus=2 --num-clusters=2* > > root@localhost:~# lscpu > > Architecture: aarch64 > > Byte Order: Little Endian > > CPU(s): 4 > > On-line CPU(s) list: 0,1 > > Off-line CPU(s) list: 2,3 > > Thread(s) per core: 1 > > Core(s) per socket: 1 > > Socket(s): 2 > > > > *--num-cpus=2 --num-clusters=1* > > root@localhost:~# lscpu > > Architecture: aarch64 > > Byte Order: Little Endian > > CPU(s): 4 > > On-line CPU(s) list: 0,1 > > Off-line CPU(s) list: 2,3 > > Thread(s) per core: 1 > > Core(s) per socket: 1 > > Socket(s): 2 > > > > *--num-cpus=1 --num-clusters=1* > > root@localhost:~# lscpu > > Architecture: aarch64 > > Byte Order: Little Endian > > CPU(s): 4 > > On-line CPU(s) list: 0 > > Off-line CPU(s) list: 1-3 > > Thread(s) per core: 1 > > Core(s) per socket: 1 > > Socket(s): 1 > > > > Regards, > > Somnath > > > > *From:* gem5-users [mailto:[email protected]] *On Behalf Of > *Mukherjee, > Somnath > *Sent:* Thursday, March 09, 2017 4:17 PM > *To:* gem5 users mailing list > *Subject:* Re: [gem5-users] Error in simulation of num_cluster and > num_cpu? > > > > Can I get some help on this, please? > > > > Thanks in advance. > > > > Regards, > > Somnath > > > > *From:* gem5-users [mailto:[email protected] > <[email protected]>] *On Behalf Of *Mukherjee, Somnath > *Sent:* Wednesday, March 08, 2017 4:33 PM > *To:* [email protected] > *Subject:* [gem5-users] Error in simulation of num_cluster and num_cpu? > > > > All, > > I am booting Ubutnu on A72 cores and the command is as given below. > > > > ./build/ARM/gem5.fast ./configs/example/fs.py > --kernel=${M5_PATH}/binaries/vmlinux.aarch64.20140821 > --disk-image=${M5_PATH}/disks/aarch64-ubuntu-trusty-headless.img > --dtb-filename=${M5_PATH}/binaries/vexpress.aarch64.20140821.dtb > --machine-type=VExpress_EMM64 --caches --l2cache --l3cache --l1d_size=32kB > --l1i_size=48kB *--num-cpus=2 --num-clusters=4* --cpu-type=a72_detailed > --mem-size=2048MB --mem-type=DDR3_1600_x64 --sys-clock=1100MHz > --cpu-clock=2200MHz > > > > However, once the Ubuntu is booted, lscpu command returns the following. > It appears to me the num_cpu and num_clusters are not simulated properly! > Can someone please confirm and/or let me know what’s the remedy? > > > > $lscpu > > Architecture: aarch64 > > Byte Order: Little Endian > > CPU(s): 4 > > On-line CPU(s) list: 0,1 > > Off-line CPU(s) list: 2,3 > > Thread(s) per core: 1 > > Core(s) per socket: 1 > > Socket(s): 2 > > > > Regards, > > Somnath Mukherjee > > Bangalore > > >
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