I use mx6dq platform. Found below problem. Run Perf top. First column always 0, but order look like correct. 0.00% perf [.] 0x00049420 0.00% [kernel] [k] kallsyms_expand_symbol.constprop.5 0.00% [kernel] [k] vsnprintf 0.00% [kernel] [k] arch_cpu_idle 0.00% [kernel] [k] format_decode 0.00% [kernel] [k] number.isra.2 0.00% libc-2.19.so [.] strstr 0.00% libc-2.19.so [.] 0x00072498 0.00% libc-2.19.so [.] memchr 0.00% [kernel] [k] _raw_spin_unlock_irqrestore 0.00% [kernel] [k] string.isra.4 0.00% [kernel] [k] strnlen 0.00% libc-2.19.so [.] getdelim 0.00% libc-2.19.so [.] memcpy 0.00% [kernel] [k] lock_acquire 0.00% libc-2.19.so [.] strchr 0.00% libc-2.19.so [.] strcmp 0.00% [kernel] [k] _raw_spin_unlock_irq 0.00% libc-2.19.so [.] __libc_calloc 0.00% libc-2.19.so [.] _IO_feof 0.00% [kernel] [k] pointer.isra.15 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/linux-arm-kernel