ftrace: take advantage of variable length entries

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Now that the underlining ring buffer for ftrace now hold variable length
entries, we can take advantage of this by only storing the size of the
actual event into the buffer. This happens to increase the number of
entries in the buffer dramatically.

We can also get rid of the "trace_cont" operation, but I'm keeping that
until we have no more users. Some of the ftrace tracers can now change
their code to adapt to this new feature.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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This commit is contained in:

Steven Rostedt 2008-09-29 23:02:42 -04:00 • committed by Ingo Molnar

parent 3928a8a2d9

commit 777e208d40

4 changed files with 301 additions and 263 deletions

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439

kernel/trace/trace.c

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81

kernel/trace/trace.h

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13

kernel/trace/trace_boot.c

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31

kernel/trace/trace_mmiotrace.c

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