AM335X linux context switch time

justin wang1

Expert 1085 points

Hello

I want to know the every process run time and context switch time as following figure

P/S : I use TI Linux SDK 6.0

over 11 years ago

0 Miroslav Kiradzhiyski XID over 11 years ago

TI__Mastermind 25235 points

Hi Justin,

I'm not sure our SDK comes with that functionality implemented. You may try the pidstat command if you cross compile it or find it for arm linux.

http://linux.die.net/man/1/pidstat

Best regards,
Miroslav

0 Jeff L over 11 years ago

TI__Expert 5960 points

Hello Justin,

You may want to look at ftrace which is part of the mainline linux kernel and comes with SDK6.0. You do have to enable some of the ftrace features in the kernel, such as CONFIG_FUNCTION_GRAPH_TRACER. The following article covers what kernel options to use: http://lwn.net/Articles/365835/

The ftrace data is pretty low level and raw, so you may want to also look at trace-cmd and kernel shark. I've seen a nice presentation by Steven Rostedt called "Ftrace - Linux Kernel Tracing" which covers how to utilize Ftrace you can google.

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AM335X linux context switch time