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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2009-03-05 01:49:22 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-03-05 12:14:41 +0100 |
| commit | 0012693ad4f636c720fed3802027f9427962f540 (patch) | |
| tree | 355277518dbdcc8385f374db1a5d5e15301940e0 /kernel/trace/trace_functions_graph.c | |
| parent | c4ef144a9d0803eb0a2d4110ae87e7f34e667ded (diff) | |
| download | talos-obmc-linux-0012693ad4f636c720fed3802027f9427962f540.tar.gz talos-obmc-linux-0012693ad4f636c720fed3802027f9427962f540.zip | |
tracing/function-graph-tracer: use the more lightweight local clock
Impact: decrease hangs risks with the graph tracer on slow systems
Since the function graph tracer can spend too much time on timer
interrupts, it's better now to use the more lightweight local
clock. Anyway, the function graph traces are more reliable on a
per cpu trace.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <49af243d.06e9300a.53ad.ffff840c@mx.google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/trace_functions_graph.c')
| -rw-r--r-- | kernel/trace/trace_functions_graph.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c index c009553a8e81..e527f2f66c73 100644 --- a/kernel/trace/trace_functions_graph.c +++ b/kernel/trace/trace_functions_graph.c @@ -112,7 +112,7 @@ unsigned long ftrace_return_to_handler(void) unsigned long ret; ftrace_pop_return_trace(&trace, &ret); - trace.rettime = cpu_clock(raw_smp_processor_id()); + trace.rettime = trace_clock_local(); ftrace_graph_return(&trace); if (unlikely(!ret)) { |
