- 23 May, 2008 35 commits
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Ingo Molnar authored
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Ingo Molnar <mingo@elte.hu> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
now that we have a kbuild method for notrace, no need to pollute the C code with the annotations. Signed-off-by:
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Steven Rostedt authored
A new check was added in the ftrace function that wont trace if the CPU trace buffer is disabled. Unfortunately, other tracers used ftrace() to write to the buffer after they disabled it. The new disable check makes these calls into a nop. This patch changes the __ftrace that is called without the check into a new api for the other tracers to use, called "trace_function". The other tracers use this interface instead when the trace CPU buffer is already disabled. Signed-off-by:
Steven Rostedt <srostedt@redhat.com> Signed-off-by:
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Soeren Sandmann Pedersen authored
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Ingo Molnar authored
no need to backmerge, only affects ftrace-enabled kernels. (which is not the default) Signed-off-by:
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
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Steven Rostedt authored
This patch is the correct way to have tracing enabled by default. Signed-off-by:
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Steven Rostedt authored
Some fixes for better output with the trace pipe. Signed-off-by:
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Ingo Molnar authored
should be an irq-safe lock ... Signed-off-by:
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Ingo Molnar authored
for ad-hoc tracing. Signed-off-by:
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
remove idx syncing - it's expensive on SMP. Signed-off-by:
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Ingo Molnar authored
implement globally synchronized, fast and scalable time source for tracing. Signed-off-by:
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Ingo Molnar authored
rename and uninline now() to ftrace_now(). Signed-off-by:
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Ingo Molnar authored
no code changed. Signed-off-by:
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Ingo Molnar authored
we can hold all cpu trace buffer locks at once - put each into a separate lock class. Signed-off-by:
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Steven Rostedt authored
This patch creates a file called trace_pipe in the tracing debug directory. This file is a consumer of the trace buffers. This means that reads of this file consumes the entries from the trace buffers so that they will not be read a second time, as contrast to the static buffers latency_trace and trace. Reading from the trace_pipe will remove the entries from trace and latency_trace too. The advantage that trace_pipe has is that it can record live traces. It will block when there is nothing in the buffer, and read the entries as they are entered. An EOF happens when tracing is disabled (tracing_enabled = 0). Signed-off-by:
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Steven Rostedt authored
Later patches will need to print the same things as the seq output does. But those outputs will not use the seq utility. This patch adds a buffer to the iterator, that can be used by either the seq utility or other output. Signed-off-by:
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Steven Rostedt authored
This patch changes the way the CPU trace buffers are handled. Instead of always starting from the trace page head, the logic is changed to a producer consumer logic. This allows for the buffers to be drained while they are alive. Signed-off-by:
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Steven Rostedt authored
The tests may leave stuff in the buffers. This resets the buffers after each test is run. If a test fails, it does not reset the buffer to avoid touching a buffer that is corrupted. Signed-off-by:
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Ingo Molnar authored
fix time offset calculations and ordering, plus make code more consistent. Signed-off-by:
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Ingo Molnar authored
make it easier for newbies to find their way around. Signed-off-by:
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Ingo Molnar authored
factor out code and clean it up. Signed-off-by:
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Steven Rostedt authored
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Steven Rostedt authored
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Steven Rostedt authored
This patch fixes some bugs to the updating of the max trace that was caused by implementing the new buffering. Signed-off-by:
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Steven Rostedt authored
Using raw_local_irq_save/restore confuses lockdep. It's fine to use the normal ones. Signed-off-by:
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Steven Rostedt authored
Allocating large buffers for the tracer may fail easily. This patch converts the buffer from a large ordered allocation to single pages. It uses the struct page LRU field to link the pages together. Later patches may also implement dynamic increasing and decreasing of the trace buffers. Signed-off-by:
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Steven Rostedt authored
This patch adds the latency tracer infrastructure. This patch does not add anything that will select and turn it on, but will be used by later patches. If it were to be compiled, it would add the following files to the debugfs: The root tracing directory: /debugfs/tracing/ This patch also adds the following files: available_tracers list of available tracers. Currently no tracers are available. Looking into this file only shows "none" which is used to unregister all tracers. current_tracer The trace that is currently active. Empty on start up. To switch to a tracer simply echo one of the tracers that are listed in available_tracers: example: (used with later patches) echo function > /debugfs/tracing/current_tracer To disable the tracer: echo disable > /debugfs/tracing/current_tracer tracing_enabled echoing "1" into this file starts the ftrace function tracing (if sysctl kernel.ftrace_enabled=1) echoing "0" turns it off. latency_trace This file is readonly and holds the result of the trace. trace This file outputs a easier to read version of the trace. iter_ctrl Controls the way the output of traces look. So far there's two controls: echoing in "symonly" will only show the kallsyms variables without the addresses (if kallsyms was configured) echoing in "verbose" will change the output to show a lot more data, but not very easy to understand by humans. echoing in "nosymonly" turns off symonly. echoing in "noverbose" turns off verbose. Signed-off-by:Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Signed-off-by:
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