sonic:/usr/src/linux-3.8# cat /proc/cpuinfo model name : AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ sonic:/usr/src/linux-3.8# time make -j2 real 17m25.851s user 29m17.836s sys 2m44.056s sonic@virtualubuntu:~/linux-3.8$ cat /proc/cpuinfo model name : Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz flags : hypervisor sonic@virtualubuntu:~/linux-3.8$ time make -j8 real 3m6.202s user 21m14.140s sys 1m35.842s sonic@virtualubuntu:~/kernel$ time make -j8 ARCH=arm CROSS_COMPILE=../gcc-linaro-arm-linux-gnueabihf-*_linux/bin/arm-linux-gnueabihf- real 7m38.657s user 52m33.476s sys 3m11.780s