From: Frederic Weisbecker <fweisbec@gmail.com>
Date: Wed, 3 Dec 2008 01:32:12 +0000 (+0100)
Subject: tracing/function-graph-tracer: improve duration output
X-Git-Tag: v2.6.29-rc1~586^2~34^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=166d3c7994d79ab3f78f420607283361ff5cce79;p=pandora-kernel.git

tracing/function-graph-tracer: improve duration output

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>
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