tree bf490d104276142e914f1245bbc9f44cb0d2bc9b
parent 6409c4da289d6905f7ae2bd0630438368439bda2
author Ingo Molnar <mingo@elte.hu> 1235670431 +0100
committer Ingo Molnar <mingo@elte.hu> 1235670246 +0100

tracing: implement trace_clock_*() APIs

Impact: implement new tracing timestamp APIs

Add three trace clock variants, with differing scalability/precision
tradeoffs:

 -   local: CPU-local trace clock
 -  medium: scalable global clock with some jitter
 -  global: globally monotonic, serialized clock

Make the ring-buffer use the local trace clock internally.

Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>