Steven Rostedt
73c5162aa3
tracing: keep ring buffer to minimum size till used
...
Impact: less memory impact on systems not using tracer
When the kernel boots up that has tracing configured, it allocates
the default size of the ring buffer. This currently happens to be
1.4Megs per possible CPU. This is quite a bit of wasted memory if
the system is never using the tracer.
The current solution is to keep the ring buffers to a minimum size
until the user uses them. Once a tracer is piped into the current_tracer
the ring buffer will be expanded to the default size. If the user
changes the size of the ring buffer, it will take the size given
by the user immediately.
If the user adds a "ftrace=" to the kernel command line, then the ring
buffers will be set to the default size on initialization.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
2009-03-11 22:15:22 -04:00
..
blktrace.c
tracing: remove funky whitespace in the trace code
2009-03-10 14:13:14 -04:00
events.c
tracing: use generic __stringify
2009-03-10 00:35:05 -04:00
ftrace.c
tracing: fix deadlock when setting set_ftrace_pid
2009-03-06 12:07:38 +01:00
Kconfig
tracing/core: drop the old trace_printk() implementation in favour of trace_bprintk()
2009-03-06 17:59:12 +01:00
kmemtrace.c
tracing: Introduce trace_buffer_{lock_reserve,unlock_commit}
2009-02-06 01:01:41 +01:00
Makefile
tracing/core: drop the old trace_printk() implementation in favour of trace_bprintk()
2009-03-06 17:59:12 +01:00
ring_buffer.c
tracing: make all file_operations const
2009-03-05 21:46:40 -05:00
trace.c
tracing: keep ring buffer to minimum size till used
2009-03-11 22:15:22 -04:00
trace.h
tracing: new format for specialized trace points
2009-03-10 00:35:07 -04:00
trace_boot.c
tracing: Introduce trace_buffer_{lock_reserve,unlock_commit}
2009-02-06 01:01:41 +01:00
trace_branch.c
tracing: remove funky whitespace in the trace code
2009-03-10 14:13:14 -04:00
trace_clock.c
tracing: implement trace_clock_*() APIs
2009-02-26 18:44:06 +01:00
trace_event_types.h
tracing: new format for specialized trace points
2009-03-10 00:35:07 -04:00
trace_events.c
tracing: add back the available_events file
2009-03-10 12:04:02 -04:00
trace_events_stage_1.h
tracing: update comments to match event code macros
2009-03-10 13:12:58 -04:00
trace_events_stage_2.h
tracing: update comments to match event code macros
2009-03-10 13:12:58 -04:00
trace_events_stage_3.h
tracing: remove funky whitespace in the trace code
2009-03-10 14:13:14 -04:00
trace_export.c
tracing: remove funky whitespace in the trace code
2009-03-10 14:13:14 -04:00
trace_functions.c
tracing/core: use appropriate waiting on trace_pipe
2009-02-18 01:40:20 +01:00
trace_functions_graph.c
tracing: remove funky whitespace in the trace code
2009-03-10 14:13:14 -04:00
trace_hw_branches.c
tracing/hw-branch-tracing: convert bts-tracer mutex to a spinlock
2009-02-25 09:16:01 +01:00
trace_irqsoff.c
tracing: have latency tracers set the latency format
2009-03-04 22:15:30 -05:00
trace_mmiotrace.c
tracing/core: drop the old trace_printk() implementation in favour of trace_bprintk()
2009-03-06 17:59:12 +01:00
trace_nop.c
trace: Call tracing_reset_online_cpus before tracer->init()
2009-02-06 01:01:41 +01:00
trace_output.c
tracing: remove funky whitespace in the trace code
2009-03-10 14:13:14 -04:00
trace_output.h
tracing/core: drop the old trace_printk() implementation in favour of trace_bprintk()
2009-03-06 17:59:12 +01:00
trace_power.c
tracing: convert c/p state power tracer to use tracepoints
2009-02-13 09:06:18 -05:00
trace_printk.c
tracing/core: drop the old trace_printk() implementation in favour of trace_bprintk()
2009-03-06 17:59:12 +01:00
trace_sched_switch.c
tracing/core: use appropriate waiting on trace_pipe
2009-02-18 01:40:20 +01:00
trace_sched_wakeup.c
tracing: have latency tracers set the latency format
2009-03-04 22:15:30 -05:00
trace_selftest.c
tracing: use generic __stringify
2009-03-10 00:35:05 -04:00
trace_selftest_dynamic.c
trace_stack.c
trace_stat.c
tracing: fix typing mistake in hint message and comments
2009-02-17 12:38:24 -05:00
trace_stat.h
tracing/ftrace: separate events tracing and stats tracing engine
2009-01-14 12:11:37 +01:00
trace_sysprof.c
tracing: make all file_operations const
2009-03-05 21:46:40 -05:00
trace_workqueue.c
tracing: remove funky whitespace in the trace code
2009-03-10 14:13:14 -04:00