tracing/function-graph-tracer: display unified style cmdline and pid

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Impact: extend function-graph output: let one know which thread called a function

This patch implements a helper function to print the couple cmdline/pid.
Its output is provided during task switching and on each row if the new
"funcgraph-proc" defualt-off option is set through trace_options file.

The output is center aligned and never exceeds 14 characters. The cmdline
is truncated over 7 chars.
But note that if the pid exceeds 6 characters, the column will overflow (but
the situation is abnormal).

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

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Frederic Weisbecker 2008-12-03 02:30:37 +01:00 • committed by Ingo Molnar

parent 62679efe0a

commit 11e84acc40

1 changed files with 99 additions and 14 deletions

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kernel/trace/trace_functions_graph.c

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