linux/kernel/trace/trace_selftest.c, branch v2.6.28

ftrace: remove daemon

2008-10-23T14:00:22Z

The ftrace daemon is complex and error prone. This patch strips it out of the code. Signed-off-by: Steven Rostedt Signed-off-by: Ingo Molnar

ftrace: rename FTRACE to FUNCTION_TRACER

2008-10-20T16:27:03Z

Due to confusion between the ftrace infrastructure and the gcc profiling tracer "ftrace", this patch renames the config options from FTRACE to FUNCTION_TRACER. The other two names that are offspring from FTRACE DYNAMIC_FTRACE and FTRACE_MCOUNT_RECORD will stay the same. This patch was generated mostly by script, and partially by hand. Signed-off-by: Steven Rostedt Signed-off-by: Ingo Molnar

ftrace: make work with new ring buffer

2008-10-14T08:38:57Z

This patch ports ftrace over to the new ring buffer. Signed-off-by: Steven Rostedt Signed-off-by: Ingo Molnar

ftrace: give time for wakeup test to run

2008-10-14T08:38:53Z

It is possible that the testing thread in the ftrace wakeup test does not run before we stop the trace. This will cause the trace to fail since nothing will be in the buffers. This patch adds a small wait in the wakeup test to allow for the woken task to run and be traced. Signed-off-by: Steven Rostedt Signed-off-by: Ingo Molnar

ftrace: add nop tracer

2008-10-14T08:37:43Z

A no-op tracer which can serve two purposes: 1. A template for development of a new tracer. 2. A convenient way to see ftrace_printk() calls without an irrelevant trace making the output messy. [ mingo@elte.hu: resolved conflicts ] Signed-off-by: Steven Noonan Signed-off-by: Ingo Molnar

ftrace: printk formatting infrastructure

2008-10-14T08:35:19Z

This patch adds a feature that can help kernel developers debug their code using ftrace. int ftrace_printk(const char *fmt, ...); This records into the ftrace buffer using printf formatting. The entry size in the buffers are still a fixed length. A new type has been added that allows for more entries to be used for a single recording. The start of the print is still the same as the other entries. It returns the number of characters written to the ftrace buffer. For example: Having a module with the following code: static int __init ftrace_print_test(void) { ftrace_printk("jiffies are %ld\n", jiffies); return 0; } Gives me: insmod-5441 3...1 7569us : ftrace_print_test: jiffies are 4296626666 for the latency_trace file and: insmod-5441 [03] 1959.370498: ftrace_print_test jiffies are 4296626666 for the trace file. Note: Only the infrastructure should go into the kernel. It is to help facilitate debugging for other kernel developers. Calls to ftrace_printk is not intended to be left in the kernel, and should be frowned upon just like scattering printks around in the code. But having this easily at your fingertips helps the debugging go faster and bugs be solved quicker. Maybe later on, we can hook this with markers and have their printf format be sucked into ftrace output. Signed-off-by: Steven Rostedt Signed-off-by: Ingo Molnar

Merge branch 'tracing/sysprof' into auto-ftrace-next

2008-07-10T09:43:08Z

ftrace: limit use of check pages

2008-05-26T20:39:45Z

The check_pages function is called often enough that it can cause problems with trace outputs or even bringing the system to a halt. This patch limits the check_pages to the places that are most likely to have problems. The check is made at the flip between the global array and the max save array, as well as when the size of the buffers changes and the self tests. This patch also removes the BUG_ON from check_pages and replaces it with a WARN_ON and disabling of the tracer. Signed-off-by: Steven Rostedt Cc: pq@iki.fi Cc: proski@gnu.org Cc: sandmann@redhat.com Cc: a.p.zijlstra@chello.nl Signed-off-by: Thomas Gleixner

ftrace: make sysprof dependent on x86 for now

2008-05-23T21:40:01Z

that's the only tested platform for now. If there's interest we can make it generic easily. Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner

ftrace: sysprof-plugin, add self-tests

2008-05-23T21:39:38Z

Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner