Linux Kernel Module Cheat

./run --arch arm --cpus 2 --emulator gem5

Can be checked with /proc/cpuinfo or getconf in Ubuntu 18.04:

cat /proc/cpuinfo
getconf _NPROCESSORS_CONF

Or from User mode simulation, we can use either of:

./run --cpus 2 --emulator gem5 --userland userland/linux/sysconf.c | grep _SC_NPROCESSORS_ONLN

./run --cpus 2 --emulator gem5 --userland userland/cpp/thread_hardware_concurrency.cpp

direct access to several special filesystem files that contain this information e.g. via userland/c/cat.c:
```
./run --cpus 2 --emulator gem5 --userland userland/c/cat.c --cli-args /proc/cpuinfo
```