linux-stable/kernel/trace
Tom Zanussi d0bad49bb0 tracing: Add enable_hist/disable_hist triggers
Similar to enable_event/disable_event triggers, these triggers enable
and disable the aggregation of events into maps rather than enabling
and disabling their writing into the trace buffer.

They can be used to automatically start and stop hist triggers based
on a matching filter condition.

If there's a paused hist trigger on system:event, the following would
start it when the filter condition was hit:

  # echo enable_hist:system:event [ if filter] > event/trigger

And the following would disable a running system:event hist trigger:

  # echo disable_hist:system:event [ if filter] > event/trigger

See Documentation/trace/events.txt for real examples.

Link: http://lkml.kernel.org/r/f812f086e52c8b7c8ad5443487375e03c96a601f.1457029949.git.tom.zanussi@linux.intel.com

Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Tested-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2016-04-19 18:55:57 -04:00
..
blktrace.c kernel/...: convert pr_warning to pr_warn 2016-03-22 15:36:02 -07:00
bpf_trace.c bpf: prevent kprobe+bpf deadlocks 2016-03-08 15:28:30 -05:00
ftrace.c Nothing major this round. Mostly small clean ups and fixes. 2016-03-24 10:52:25 -07:00
Kconfig tracing: Add 'hist' event trigger command 2016-04-19 12:16:14 -04:00
Makefile tracing: Add 'hist' event trigger command 2016-04-19 12:16:14 -04:00
power-traces.c cpufreq: powernv/tracing: Add powernv_throttle tracepoint 2016-02-05 02:38:02 +01:00
ring_buffer.c ring-buffer: Process commits whenever moving to a new page. 2015-11-25 15:24:05 -05:00
ring_buffer_benchmark.c ring_buffer: Remove unneeded smp_wmb() before wakeup of reader benchmark 2015-11-03 16:19:02 -05:00
rpm-traces.c
trace.c tracing: Add enable_hist/disable_hist triggers 2016-04-19 18:55:57 -04:00
trace.h tracing: Add enable_hist/disable_hist triggers 2016-04-19 18:55:57 -04:00
trace_benchmark.c tracing: Only benchmark the time tracepoints take if tracing is on 2015-11-02 13:34:58 -05:00
trace_benchmark.h
trace_branch.c tracing: Remove {start,stop}_branch_trace 2015-10-21 10:10:09 -04:00
trace_clock.c tracing: Export tracing clock functions 2015-05-12 15:56:57 -04:00
trace_entries.h
trace_event_perf.c Not much new with tracing for this release. Mostly just clean ups and 2016-01-12 20:04:15 -08:00
trace_events.c tracing: Add 'hist' event trigger command 2016-04-19 12:16:14 -04:00
trace_events_filter.c tracing: Make ftrace_event_field checking functions available 2016-03-08 11:19:29 -05:00
trace_events_filter_test.h
trace_events_hist.c tracing: Add enable_hist/disable_hist triggers 2016-04-19 18:55:57 -04:00
trace_events_trigger.c tracing: Add enable_hist/disable_hist triggers 2016-04-19 18:55:57 -04:00
trace_export.c tracing: ftrace_event_is_function() can return boolean 2015-11-02 14:28:05 -05:00
trace_functions.c tracing: Make tracer_flags use the right set_flag callback 2016-03-08 11:19:08 -05:00
trace_functions_graph.c arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections 2016-03-25 16:37:42 -07:00
trace_irqsoff.c tracing: Remove redundant reset per-CPU buff in irqsoff tracer 2016-03-18 16:39:11 -04:00
trace_kdb.c tracing: Move trace_flags from global to a trace_array field 2015-09-30 15:22:55 -04:00
trace_kprobe.c kernel/...: convert pr_warning to pr_warn 2016-03-22 15:36:02 -07:00
trace_mmiotrace.c kernel/...: convert pr_warning to pr_warn 2016-03-22 15:36:02 -07:00
trace_nop.c tracing: Fix typoes in code comment and printk in trace_nop.c 2016-03-08 11:23:57 -05:00
trace_output.c tracing: Record and show NMI state 2016-03-22 18:04:10 -04:00
trace_output.h tracing: Turn seq_print_user_ip() into a static function 2015-09-28 10:16:12 -04:00
trace_printk.c tracing: Fix trace_printk() to print when not using bprintk() 2016-03-22 18:02:40 -04:00
trace_probe.c kernel/...: convert pr_warning to pr_warn 2016-03-22 15:36:02 -07:00
trace_probe.h kernel/trace_probe: is_good_name can be boolean 2015-09-22 13:11:30 -04:00
trace_sched_switch.c sched/core: Fix trace_sched_switch() 2015-10-06 17:08:15 +02:00
trace_sched_wakeup.c Most of the changes are clean ups and small fixes. Some of them have 2015-11-06 13:30:20 -08:00
trace_selftest.c
trace_selftest_dynamic.c
trace_seq.c
trace_stack.c tracing, kasan: Silence Kasan warning in check_stack of stack_tracer 2016-02-19 12:36:44 -05:00
trace_stat.c kernel/...: convert pr_warning to pr_warn 2016-03-22 15:36:02 -07:00
trace_stat.h
trace_syscalls.c Nothing major this round. Mostly small clean ups and fixes. 2016-03-24 10:52:25 -07:00
trace_uprobe.c kernel/...: convert pr_warning to pr_warn 2016-03-22 15:36:02 -07:00
tracing_map.c tracing: Update some tracing_map constants and comments 2016-04-19 12:16:06 -04:00
tracing_map.h tracing: Update some tracing_map constants and comments 2016-04-19 12:16:06 -04:00