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24a53652e3
linux/kernel/trace
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Frederic Weisbecker 24a53652e3 tracing: Drop the tr check from the graph tracing path 
Each time we save a function entry from the function graph
tracer, we check if the trace array is set, which is wasteful
because it is set anyway before we start the tracer. All we need
is to ensure we have good read and write orderings. When we set
the trace array, we just need to guarantee it to be visible
before starting tracing.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
LKML-Reference: <1263453795-7496-1-git-send-regression-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-17 08:06:25 +01:00
..
blktrace.c Add a tracepoint for block request remapping 2009-10-01 21:19:34 +02:00
ftrace.c function-graph: Allow writing the same val to set_graph_function 2009-12-13 18:37:26 +01:00
Kconfig tracing: Kconfig spelling fixes and cleanups 2009-12-28 10:37:54 +01:00
kmemtrace.c kmemtrace: Fix up tracer registration 2009-10-01 11:53:44 +02:00
Makefile Merge branch 'tracing/hw-breakpoints' into perf/core 2009-11-21 14:07:23 +01:00
power-traces.c tracing/power: Remove two exports 2009-12-13 18:37:28 +01:00
ring_buffer_benchmark.c ring-buffer-benchmark: Add parameters to set produce/consumer priorities 2009-11-25 14:14:15 -05:00
ring_buffer.c Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-12-16 12:02:25 -08:00
trace_boot.c tracing: add filter event logic to special, mmiotrace and boot tracers 2009-09-12 23:34:04 -04:00
trace_branch.c tracing: user local buffer variable for trace branch tracer 2009-10-07 21:53:41 -04:00
trace_clock.c locking: Convert __raw_spin* functions to arch_spin* 2009-12-14 23:55:32 +01:00
trace_entries.h hw-breakpoints: Rewrite the hw-breakpoints layer on top of perf events 2009-11-08 15:34:42 +01:00
trace_event_profile.c tracing: Change event->profile_count to be int type 2009-12-13 18:37:28 +01:00
trace_events_filter.c tracing/filters: Fix to make system filter work 2009-10-29 08:53:20 +01:00
trace_events.c tracing: Remove show_format and related macros from TRACE_EVENT 2010-01-06 12:08:46 -05:00
trace_export.c tracing: Remove show_format and related macros from TRACE_EVENT 2010-01-06 12:08:46 -05:00
trace_functions_graph.c tracing: Drop the tr check from the graph tracing path 2010-01-17 08:06:25 +01:00
trace_functions.c tracing: switch function prints from %pf to %ps 2009-09-17 15:53:40 -04:00
trace_hw_branches.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2009-12-14 09:58:24 -08:00
trace_irqsoff.c tracing: Add stack trace to irqsoff tracer 2009-12-11 13:19:51 -05:00
trace_kprobe.c tracing: Remove show_format and related macros from TRACE_EVENT 2010-01-06 12:08:46 -05:00
trace_ksym.c ksym_tracer: Remove trace_stat 2009-12-30 07:50:50 +01:00
trace_mmiotrace.c tracing: add filter event logic to special, mmiotrace and boot tracers 2009-09-12 23:34:04 -04:00
trace_nop.c tracing/ftrace: make nop-tracer use polling wait for events on pipe 2009-03-23 09:22:15 +01:00
trace_output.c tracing: Add full state to trace_seq 2009-12-09 14:05:49 -05:00
trace_output.h tracing: consolidate code between trace_output.c and trace_function_graph.c 2009-09-11 14:24:13 -04:00
trace_printk.c tracing: Remove markers 2009-09-18 21:22:08 +02:00
trace_sched_switch.c tracing: pass around ring buffer instead of tracer 2009-09-04 18:59:39 -04:00
trace_sched_wakeup.c locking: Convert __raw_spin* functions to arch_spin* 2009-12-14 23:55:32 +01:00
trace_selftest_dynamic.c
trace_selftest.c locking: Convert __raw_spin* functions to arch_spin* 2009-12-14 23:55:32 +01:00
trace_stack.c locking: Convert __raw_spin* functions to arch_spin* 2009-12-14 23:55:32 +01:00
trace_stat.c trace_stat: Fix missing entry in stat file 2009-08-17 11:25:09 +02:00
trace_stat.h tracing/stat: Add stat_release() callback 2009-07-10 12:14:05 +02:00
trace_syscalls.c tracing: Remove show_format and related macros from TRACE_EVENT 2010-01-06 12:08:46 -05:00
trace_sysprof.c perf events, x86/stacktrace: Make stack walking optional 2009-12-17 09:56:19 +01:00
trace_workqueue.c tracing/workqueues: Add refcnt to struct cpu_workqueue_stats 2009-07-10 12:14:07 +02:00
trace.c tracing: Add stack dump to trace_printk if stacktrace option is set 2010-01-06 18:09:57 -05:00
trace.h Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-12-16 12:02:25 -08:00