linux/kernel/trace/trace_functions.c, branch v2.6.30

tracing/core: use appropriate waiting on trace_pipe

2009-02-18T00:40:20Z

Impact: api and pipe waiting change Currently, the waiting used in tracing_read_pipe() is done through a 100 msecs schedule_timeout() loop which periodically check if there are traces on the buffer. This can cause small latencies for programs which are reading the incoming events. This patch makes the reader waiting for the trace_wait waitqueue except for few tracers such as the sched and functions tracers which might be already hold the runqueue lock while waking up the reader. This is performed through a new callback wait_pipe() on struct tracer. If none is implemented on a specific tracer, the default waiting for trace_wait queue is attached. Signed-off-by: Frederic Weisbecker Signed-off-by: Ingo Molnar

ftrace: show unlimited when traceon or traceoff has no counter

2009-02-17T18:12:12Z

Impact: clean up The traceon and traceoff function probes are confusing to developers to what happens when a counter is not specified. This should help clear things up. # echo "*:traceoff" > set_ftrace_filter # cat /debug/tracing/set_ftrace_filter #### all functions enabled #### do_fork:traceoff:unlimited Signed-off-by: Steven Rostedt

ftrace: rename _hook to _probe

2009-02-17T17:32:04Z

Impact: clean up Ingo Molnar did not like the _hook naming convention used by the select function tracer. Luis Claudio R. Goncalves suggested using the "_probe" extension. This patch implements the change of calling the functions and variables "_hook" and replacing them with "_probe". Signed-off-by: Steven Rostedt

ftrace: clean up coding style

2009-02-17T16:20:26Z

Ingo Molnar pointed out some coding style issues with the recent ftrace updates. This patch cleans them up. Signed-off-by: Steven Rostedt

ftrace: add pretty print function for traceon and traceoff hooks

2009-02-17T04:38:13Z

This patch adds a pretty print version of traceon and traceoff output for set_ftrace_filter. # echo 'sys_open:traceon:4' > set_ftrace_filter # cat set_ftrace_filter #### all functions enabled #### sys_open:traceon:count=4 Signed-off-by: Steven Rostedt

ftrace: add traceon traceoff commands to enable/disable the buffers

2009-02-17T03:50:04Z

This patch adds the new function selection commands traceon and traceoff. traceon sets the function to enable the ring buffers while traceoff disables the ring buffers. You can pass in the number of times you want the command to be executed when the function is hit. It will only execute if the state of the buffers are not already in that state. Example: # echo do_fork:traceon:4 Will enable the ring buffers if they are disabled every time it hits do_fork, up to 4 times. # echo sys_close:traceoff This will disable the ring buffers every time (unlimited) when sys_close is called. Signed-off-by: Steven Rostedt

trace: Call tracing_reset_online_cpus before tracer->init()

2009-02-06T00:01:41Z

Impact: cleanup To make it easy for ftrace plugin writers, as this was open coded in the existing plugins Signed-off-by: Arnaldo Carvalho de Melo Acked-by: Frédéric Weisbecker Signed-off-by: Ingo Molnar

trace: Remove unused trace_array_cpu parameter

2009-02-05T13:35:47Z

Impact: cleanup Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Steven Rostedt Signed-off-by: Ingo Molnar

ftrace: remove static from function tracer functions

2009-01-16T11:17:58Z

Impact: clean up After reorganizing the functions in trace.c and trace_function.c, they no longer need to be in global context. This patch makes the functions and one variable into static. Signed-off-by: Steven Rostedt Signed-off-by: Ingo Molnar

ftrace: combine stack trace in function call

2009-01-16T11:17:46Z

Impact: less likely to interleave function and stack traces This patch does replaces the separate stack trace on function with a record function and stack trace together. This will switch between the function only recording to a function and stack recording. Also some whitespace fix ups as well. Signed-off-by: Steven Rostedt Signed-off-by: Ingo Molnar