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Eric Sun authored
Register PMU resources during system bootup, so that "Perf" Command can be used to get misc performance data of a running program The "Perf" Exe should be built manually in "./tools/perf" using the following command line > make CROSS_COMPILER=... ARCH=arm CFLAGS="-static -DGElf_Nhdr=Elf32_Nhdr" then copy the "Perf" executable to rootfs/bin Usage : perf # show help content perf list # show all available statistics options perf stat ls # show all statistics of a "ls" command perf stat -e cycles tar cvfz bin.tgz /bin # show "cycles" statistics of command # "tar cvfz ...." MX6 Series Chips bound all CPUs PERFMON IRQ to one, this may cause some problems when get per-CPU statistics. Need further investigation Signed-off-by: Eric Sun <jian.sun@freescale.com>
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