tracing/function-graph-tracer: improve duration output

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Impact: better trace output of duration for long calls

The old duration output didn't exceeded 9999.999 us to fit the column
and the nanosecs were always 3 numbers. As Ingo suggested, it's better
to have the whole microseconds elapsed time and shift the nanosecs precision
if needed to fit the maximum 7 numbers. And usec need more number, the case
should be rare and important enough to break a bit the column alignment to
show it.

So, depending of the duration value, we now have these patterns:

    u.nnn us
   uu.nnn us
  uuu.nnn us
 uuuu.nnn us
 uuuuu.nn us
 uuuuuu.n us
 uuuuuuuu..... us

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

...

This commit is contained in:

Frederic Weisbecker 2008-12-03 02:32:12 +01:00 • committed by Ingo Molnar

parent 11e84acc40

commit 166d3c7994

1 changed files with 43 additions and 12 deletions

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kernel/trace/trace_functions_graph.c

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