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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 /arch/x86/kernel | |
| parent | c4ef144a9d0803eb0a2d4110ae87e7f34e667ded (diff) | |
| download | talos-op-linux-0012693ad4f636c720fed3802027f9427962f540.tar.gz talos-op-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 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/ftrace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c index 3925ec0184b1..a85da1764b1c 100644 --- a/arch/x86/kernel/ftrace.c +++ b/arch/x86/kernel/ftrace.c @@ -436,7 +436,7 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr) return; } - calltime = cpu_clock(raw_smp_processor_id()); + calltime = trace_clock_local(); if (ftrace_push_return_trace(old, calltime, self_addr, &trace.depth) == -EBUSY) { |
