Messages in this thread Patch in this message | | | Date | Wed, 9 Dec 2009 14:40:35 -0800 | From | Tim Bird <> | Subject | [PATCH 1/4] ftrace - expose tracing_thresh and global_trace |
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Make tracing_thresh and global_trace available for function_duration tracer.
Signed-off-by: Tim Bird <tim.bird@am.sony.com> --- kernel/trace/trace.c | 7 ++++--- kernel/trace/trace.h | 5 ++++- 2 files changed, 8 insertions(+), 4 deletions(-)
--- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -165,7 +165,7 @@ unsigned long long ns2usecs(cycle_t nsec * pages for the buffer for that CPU. Each CPU has the same number * of pages allocated for its buffer. */ -static struct trace_array global_trace; +struct trace_array global_trace;
static DEFINE_PER_CPU(struct trace_array_cpu, global_trace_cpu);
@@ -503,9 +503,10 @@ static ssize_t trace_seq_to_buffer(struc static raw_spinlock_t ftrace_max_lock = (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
+unsigned long __read_mostly tracing_thresh; + #ifdef CONFIG_TRACER_MAX_TRACE unsigned long __read_mostly tracing_max_latency; -unsigned long __read_mostly tracing_thresh;
/* * Copy the new maximum trace into the separate maximum-trace @@ -4177,9 +4178,9 @@ static __init int tracer_init_debugfs(vo trace_create_file("tracing_max_latency", 0644, d_tracer, &tracing_max_latency, &tracing_max_lat_fops);
+#endif trace_create_file("tracing_thresh", 0644, d_tracer, &tracing_thresh, &tracing_max_lat_fops); -#endif
trace_create_file("README", 0444, d_tracer, NULL, &tracing_readme_fops); --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -157,6 +157,8 @@ struct trace_array { struct trace_array_cpu *data[NR_CPUS]; };
+extern struct trace_array global_trace; + #define FTRACE_CMP_TYPE(var, type) \ __builtin_types_compatible_p(typeof(var), type *)
@@ -366,9 +368,10 @@ int is_tracing_stopped(void);
extern unsigned long nsecs_to_usecs(unsigned long nsecs);
+extern unsigned long tracing_thresh; + #ifdef CONFIG_TRACER_MAX_TRACE extern unsigned long tracing_max_latency; -extern unsigned long tracing_thresh;
void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu); void update_max_tr_single(struct trace_array *tr,
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