Test passed on c4.large with 5.0.0-1025-aws

 selftests: ftrace: ftracetest
 ========================================
 === Ftrace unit tests ===
 [1] Basic trace file check	[PASS]
 [2] Basic test for tracers	[PASS]
 [3] Basic trace clock test	[PASS]
 [4] Basic event tracing check	[PASS]
 [5] Change the ringbuffer size	[PASS]
 [6] Snapshot and tracing setting	[PASS]
 [7] trace_pipe and trace_marker	[PASS]
 [8] Generic dynamic event - add/remove kprobe events	[PASS]
 [9] Generic dynamic event - add/remove synthetic events	[PASS]
 [10] Generic dynamic event - selective clear (compatibility)	[PASS]
 [11] Generic dynamic event - generic clear event	[PASS]
 [12] event tracing - enable/disable with event level files	[PASS]
 [13] event tracing - restricts events based on pid	[PASS]
 [14] event tracing - enable/disable with subsystem level files	[PASS]
 [15] event tracing - enable/disable with top level files	[PASS]
 [16] Test trace_printk from module	[UNRESOLVED]
 [17] ftrace - function graph filters with stack tracer	[PASS]
 [18] ftrace - function graph filters	[PASS]
 [19] ftrace - function pid filters	[PASS]
 [20] ftrace - stacktrace filter command	[PASS]
 [21] ftrace - function trace with cpumask	[PASS]
 [22] ftrace - test for function event triggers	[PASS]
 [23] ftrace - function trace on module	[UNRESOLVED]
 [24] ftrace - function profiling	[PASS]
 [25] ftrace - function profiler with function tracing	[PASS]
 [26] ftrace - test reading of set_ftrace_filter	[PASS]
 [27] ftrace - test for function traceon/off triggers	[PASS]
 [28] Test creation and deletion of trace instances while setting an event	[PASS]
 [29] Test creation and deletion of trace instances	[PASS]
 [30] Kprobe dynamic event - adding and removing	[PASS]
 [31] Kprobe dynamic event - busy event check	[PASS]
 [32] Kprobe dynamic event with arguments	[PASS]
 [33] Kprobe event with comm arguments	[PASS]
 [34] Kprobe event string type argument	[PASS]
 [35] Kprobe event symbol argument	[PASS]
 [36] Kprobe event argument syntax	[PASS]
 [37] Kprobes event arguments with types	[PASS]
 [38] Kprobe event auto/manual naming	[PASS]
 [39] Kprobe dynamic event with function tracer	[PASS]
 [40] Kretprobe dynamic event with arguments	[PASS]
 [41] Kretprobe dynamic event with maxactive	[PASS]
 [42] Register/unregister many kprobe events	[PASS]
 [43] Kprobe dynamic event - adding and removing	[PASS]
 [44] test for the preemptirqsoff tracer	[UNSUPPORTED]
 [45] Test wakeup tracer	[PASS]
 [46] Test wakeup RT tracer	[PASS]
 [47] event trigger - test extended error support	[PASS]
 [48] event trigger - test field variable support	[PASS]
 [49] event trigger - test multiple actions on hist trigger	[PASS]
 [50] event trigger - test inter-event histogram trigger onmatch action	[PASS]
 [51] event trigger - test inter-event histogram trigger onmatch-onmax action	[PASS]
 [52] event trigger - test inter-event histogram trigger onmax action	[PASS]
 [53] event trigger - test synthetic_events syntax parser	[PASS]
 [54] event trigger - test event enable/disable trigger	[PASS]
 [55] event trigger - test trigger filter	[PASS]
 [56] event trigger - test histogram modifiers	[PASS]
 [57] event trigger - test multiple histogram triggers	[PASS]
 [58] event trigger - test snapshot-trigger	[PASS]
 [59] event trigger - test stacktrace-trigger	[PASS]
 [60] trace_marker trigger - test snapshot trigger	[PASS]
 [61] trace_marker trigger - test histogram with synthetic event against kernel event	[PASS]
 [62] trace_marker trigger - test histogram with synthetic event	[PASS]
 [63] event trigger - test traceon/off trigger	[PASS]
 [64] (instance)  Basic test for tracers	[PASS]
 [65] (instance)  Basic trace clock test	[PASS]
 [66] (instance)  Change the ringbuffer size	[PASS]
 [67] (instance)  Snapshot and tracing setting	[PASS]
 [68] (instance)  trace_pipe and trace_marker	[PASS]
 [69] (instance)  event tracing - enable/disable with event level files	[PASS]
 [70] (instance)  event tracing - restricts events based on pid	[PASS]
 [71] (instance)  event tracing - enable/disable with subsystem level files	[PASS]
 [72] (instance)  ftrace - stacktrace filter command	[PASS]
 [73] (instance)  ftrace - test for function event triggers	[PASS]
 [74] (instance)  ftrace - test for function traceon/off triggers	[PASS]
 [75] (instance)  event trigger - test event enable/disable trigger	[PASS]
 [76] (instance)  event trigger - test trigger filter	[PASS]
 [77] (instance)  event trigger - test histogram modifiers	[PASS]
 [78] (instance)  event trigger - test multiple histogram triggers	[PASS]
 [79] (instance)  trace_marker trigger - test snapshot trigger	[PASS]
 
 
 
 # of passed:  76
 # of failed:  0
 # of unresolved:  2
 # of untested:  0
 # of unsupported:  1
 # of xfailed:  0
 # of undefined(test bug):  0
 ok 1..1 selftests: ftrace: ftracetest [PASS]