Lines Matching refs:trigger

312 Trace events can be made to conditionally invoke trigger 'commands'
316 with attached triggers is invoked, the set of trigger commands
317 associated with that event is invoked.  Any given trigger can
321 If no filter is associated with the trigger, it always passes.
324 trigger expressions to the 'trigger' file for the given event.
348 Triggers are added by echoing the command to the 'trigger' file:
350   # echo 'command[:count] [if filter]' > trigger
353 to the 'trigger' file:
355   # echo '!command[:count] [if filter]' > trigger
364 For ease of use, writing to the trigger file using '>' currently just
365 adds or removes a single trigger and there's no explicit '>>' support
369 6.2 Supported trigger commands
380   The event tracepoint stays in this mode as long as there's a trigger
381   in effect that can trigger it.
383   For example, the following trigger causes kmalloc events to be
388       /sys/kernel/debug/tracing/events/syscalls/sys_enter_read/trigger
390   The following trigger causes kmalloc events to stop being traced
395       /sys/kernel/debug/tracing/events/syscalls/sys_exit_read/trigger
405       /sys/kernel/debug/tracing/events/syscalls/sys_enter_read/trigger
408       /sys/kernel/debug/tracing/events/syscalls/sys_exit_read/trigger
411   per triggering event, but there can only be one trigger per
423   For example, the following trigger dumps a stacktrace every time the
427         /sys/kernel/debug/tracing/events/kmem/kmalloc/trigger
429   The following trigger dumps a stacktrace the first 5 times a kmalloc
433         /sys/kernel/debug/tracing/events/kmem/kmalloc/trigger
442         /sys/kernel/debug/tracing/events/kmem/kmalloc/trigger
445         /sys/kernel/debug/tracing/events/kmem/kmalloc/trigger
451         /sys/kernel/debug/tracing/events/kmem/kmalloc/trigger
453   Note that there can be only one stacktrace trigger per triggering
464   capture those events when the trigger event occurred:
467         /sys/kernel/debug/tracing/events/block/block_unplug/trigger
472         /sys/kernel/debug/tracing/events/block/block_unplug/trigger
477         /sys/kernel/debug/tracing/events/block/block_unplug/trigger
480         /sys/kernel/debug/tracing/events/block/block_unplug/trigger
482   Note that there can be only one snapshot trigger per triggering
495   trigger event:
498         /sys/kernel/debug/tracing/events/block/block_unplug/trigger
503         /sys/kernel/debug/tracing/events/block/block_unplug/trigger
508         /sys/kernel/debug/tracing/events/block/block_unplug/trigger
511         /sys/kernel/debug/tracing/events/block/block_unplug/trigger
513   Note that there can be only one traceon or traceoff trigger per