timers: Make flags output in the timer_start tracepoint useful
authorThomas Gleixner <tglx@linutronix.de>
Fri, 10 Feb 2017 15:41:15 +0000 (16:41 +0100)
committerSteven Rostedt (VMware) <rostedt@goodmis.org>
Wed, 15 Feb 2017 14:02:24 +0000 (09:02 -0500)
commit8a58a34ba479d42b3ef28f8ffd9e245a81a7786f
tree39b701b37b8f050d2c54dcf73ccb797db3105dd0
parent1f9b3546cf4c273b6d809003244d05cf0460a5e9
timers: Make flags output in the timer_start tracepoint useful

The timer flags in the timer_start trace event contain lots of useful
information, but the meaning is not clear in the trace output. Making tools
rely on the bit positions is bad as they might change over time.

Decode the flags in the print out. Tools can retrieve the bits and their
meaning from the trace format file.

Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1702101639290.4036@nanos
Requested-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
include/linux/timer.h
include/trace/events/timer.h