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Frederic Weisbecker e302cf3f96 tracing/branch-tracer: adapt to the stat tracing API ... Impact: refactor the branch tracer This patch adapts the branch tracer to the tracing API. This is a proof of concept because the branch tracer implements two "stat tracing" that were split in two files. So I added an option to the branch tracer: stat_all_branch. If it is set, then trace_stat will output all of the branches entries stats. Otherwise, it will print the annotated branches. Its is a kind of quick trick, waiting for a better solution. By default, the annotated branches stat are sorted by incorrect branch prediction percentage. Ie: correct incorrect % Function File Line ------- --------- - -------- ---- ---- 0 1 100 native_smp_prepare_cpus smpboot.c 1228 0 1 100 hpet_rtc_timer_reinit hpet.c 1057 0 18032 100 sched_info_queued sched_stats.h 223 0 684 100 yield_task_fair sched_fair.c 984 0 282 100 pre_schedule_rt sched_rt.c 1263 0 13414 100 sched_info_dequeued sched_stats.h 178 0 21724 100 sched_info_switch sched_stats.h 270 0 1 100 get_signal_to_deliver signal.c 1820 0 8 100 __cancel_work_timer workqueue.c 560 0 212 100 verify_export_symbols module.c 1509 0 17 100 __rmqueue_fallback page_alloc.c 793 0 43 100 clear_page_mlock internal.h 129 0 124 100 try_to_unmap_anon rmap.c 1021 0 53 100 try_to_unmap_anon rmap.c 1013 0 6 100 vma_address rmap.c 232 0 3301 100 try_to_unmap_file rmap.c 1082 0 466 100 try_to_unmap_file rmap.c 1077 0 1 100 mem_cgroup_create memcontrol.c 1090 0 3 100 inotify_find_update_watch inotify.c 726 2 30163 99 perf_counter_task_sched_out perf_counter.c 385 1 2935 99 percpu_free allocpercpu.c 138 1544 297672 99 dentry_lru_del_init dcache.c 153 8 1074 99 input_pass_event input.c 86 1390 76781 98 mapping_unevictable pagemap.h 50 280 6665 95 pick_next_task_rt sched_rt.c 889 750 4826 86 next_pidmap pid.c 194 2 8 80 blocking_notifier_chain_regist notifier.c 220 36 130 78 ioremap_pte_range ioremap.c 22 1093 3247 74 IS_ERR err.h 34 1023 2908 73 sched_slice sched_fair.c 445 22 60 73 disk_put_part genhd.h 206 [...] It enables a developer to quickly address the source of incorrect branch predictions. Note that this sorting would be better with a second sort on the number of incorrect predictions. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>		16 years ago
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Kconfig	trace: add a way to enable or disable the stack tracer	16 years ago
Makefile	tracing/ftrace: provide the base infrastructure for histogram tracing	16 years ago
ftrace.c	ftrace: add not to regex on filtering functions	16 years ago
ring_buffer.c	ring-buffer: prevent false positive warning	16 years ago
trace.c	tracing/ftrace: provide the base infrastructure for histogram tracing	16 years ago
trace.h	tracing/ftrace: provide the base infrastructure for histogram tracing	16 years ago
trace_boot.c	ftrace: set up trace event hash infrastructure	16 years ago
trace_branch.c	tracing/branch-tracer: adapt to the stat tracing API	16 years ago
trace_functions.c	ftrace: introduce tracing_reset_online_cpus() helper	16 years ago
trace_functions_graph.c	ftrace: set up trace event hash infrastructure	16 years ago
trace_hw_branches.c	ftrace: set up trace event hash infrastructure	16 years ago
trace_irqsoff.c	tracing/ftrace: change the type of the init() callback	16 years ago
trace_mmiotrace.c	ftrace: set up trace event hash infrastructure	16 years ago
trace_nop.c	tracing/ftrace: make nop tracer using tracer flags	16 years ago
trace_output.c	ftrace: change trace.c to use registered events	16 years ago
trace_output.h	ftrace: change trace.c to use registered events	16 years ago
trace_power.c	ftrace: set up trace event hash infrastructure	16 years ago
trace_sched_switch.c	sched, trace: update trace_sched_wakeup()	16 years ago
trace_sched_wakeup.c	sched, trace: update trace_sched_wakeup()	16 years ago
trace_selftest.c	tracing/ftrace: change the type of the init() callback	16 years ago
trace_selftest_dynamic.c	ftrace: fix dynamic ftrace selftest	17 years ago
trace_stack.c	trace: better use of stack_trace_enabled for boot up code	16 years ago
trace_stat.c	tracing/ftrace: provide the base infrastructure for histogram tracing	16 years ago
trace_sysprof.c	ftrace: introduce tracing_reset_online_cpus() helper	16 years ago