idlestat tool can't be uesd in Arm Android and X86 ubuntu in the same time.

[shaojie.sun]

In TC2 android board, ftrace format is next.
<idle>-0 [002] d... 96510.575528: cpu_idle: state=1 cpu_id=2

But in my X86 ubuntu desktop, ftrace format is next.
<idle>-0 [003] 96510.599500: cpu_idle: state=1 cpu_id=3

When using this format "%*[^]]] %*s %lf:%*[^=]=%u%*[^=]=%d", It can't read the right data form X86 ubuntu desktop.
And when using this format "%*[^]]] %lf:%*[^=]=%u%*[^=]=%d", It can't read the correct data form TC2 android board.

[Daniel Lezcano (daniel-lezcano)]

That happens because the irq-info is set for TC2 and not for x86.

You should add this option on your x86 setup:

echo irq-info > trace_options

It would be worth in the future to set also the same trace options from idlestat on each running host.

[shaojie.sun (shaojie-sun)]

If using Idlestat tool to read the file which reported by trace-cmd. the condition "echo irq-info > trace_options" maybe is not set yet.

and we can use the string "%*[^]]] %*d%lf:%*[^=]=%u%*[^=]=%d" instead of "%*[^]]] %*s %lf:%*[^=]=%u%*[^=]=%d".
And I test it, It can get correct data.