On Eoan, we no longer see the failure for traceon/off triggers ;  however, 

[45] Register/unregister many kprobe events	[FAIL]

Is failing, on arm64. Giving there are so many ftracetests open in the project that are stale, i'm going to close this bug as its originally intended to target against Disco, and re-open a new one for the new failure on Eoan, if in fact is does not align with any of the already existing bugs.

04/12 21:49:30 DEBUG|     utils:0153| [stdout] 1..1
04/12 21:49:30 DEBUG|     utils:0153| [stdout] # selftests: ftrace: ftracetest
04/12 21:49:30 DEBUG|     utils:0153| [stdout] # === Ftrace unit tests ===
04/12 21:49:34 DEBUG|     utils:0153| [stdout] # [1] Basic trace file check	[PASS]
04/12 21:50:35 DEBUG|     utils:0153| [stdout] # [2] Basic test for tracers	[PASS]
04/12 21:51:46 DEBUG|     utils:0153| [stdout] # [3] Basic trace clock test	[PASS]
04/12 21:51:50 DEBUG|     utils:0153| [stdout] # [4] Basic event tracing check	[PASS]
04/12 21:51:54 DEBUG|     utils:0153| [stdout] # [5] Change the ringbuffer size	[PASS]
04/12 21:52:02 DEBUG|     utils:0153| [stdout] # [6] Snapshot and tracing setting	[PASS]
04/12 21:52:09 DEBUG|     utils:0153| [stdout] # [7] trace_pipe and trace_marker	[PASS]
04/12 21:52:17 DEBUG|     utils:0153| [stdout] # [8] Generic dynamic event - add/remove kprobe events	[PASS]
04/12 21:52:24 DEBUG|     utils:0153| [stdout] # [9] Generic dynamic event - add/remove synthetic events	[PASS]
04/12 21:52:28 DEBUG|     utils:0153| [stdout] # [10] Generic dynamic event - selective clear (compatibility)	[PASS]
04/12 21:52:32 DEBUG|     utils:0153| [stdout] # [11] Generic dynamic event - generic clear event	[PASS]
04/12 21:52:44 DEBUG|     utils:0153| [stdout] # [12] event tracing - enable/disable with event level files	[PASS]
04/12 21:52:59 DEBUG|     utils:0153| [stdout] # [13] event tracing - restricts events based on pid	[PASS]
04/12 21:53:10 DEBUG|     utils:0153| [stdout] # [14] event tracing - enable/disable with subsystem level files	[PASS]
04/12 21:53:21 DEBUG|     utils:0153| [stdout] # [15] event tracing - enable/disable with top level files	[PASS]
04/12 21:53:26 DEBUG|     utils:0153| [stdout] # [16] Test trace_printk from module	[PASS]
04/12 21:53:48 DEBUG|     utils:0153| [stdout] # [17] ftrace - function graph filters with stack tracer	[PASS]
04/12 21:54:04 DEBUG|     utils:0153| [stdout] # [18] ftrace - function graph filters	[PASS]
04/12 21:54:42 DEBUG|     utils:0153| [stdout] # [19] ftrace - function pid filters	[PASS]
04/12 21:54:50 DEBUG|     utils:0153| [stdout] # [20] ftrace - stacktrace filter command	[PASS]
04/12 21:55:06 DEBUG|     utils:0153| [stdout] # [21] ftrace - function trace with cpumask	[PASS]
04/12 21:55:24 DEBUG|     utils:0153| [stdout] # [22] ftrace - test for function event triggers	[PASS]
04/12 21:55:28 DEBUG|     utils:0153| [stdout] # [23] ftrace - function trace on module	[PASS]
04/12 21:55:34 DEBUG|     utils:0153| [stdout] # [24] ftrace - function profiling	[PASS]
04/12 21:55:53 DEBUG|     utils:0153| [stdout] # [25] ftrace - function profiler with function tracing	[PASS]
04/12 21:56:02 DEBUG|     utils:0153| [stdout] # [26] ftrace - test reading of set_ftrace_filter	[PASS]
04/12 21:56:16 DEBUG|     utils:0153| [stdout] # [27] ftrace - test for function traceon/off triggers	[PASS]
04/12 21:56:20 DEBUG|     utils:0153| [stdout] # [28] ftrace - test tracing error log support	[PASS]
04/12 21:56:28 DEBUG|     utils:0153| [stdout] # [29] Test creation and deletion of trace instances while setting an event	[PASS]
04/12 21:56:34 DEBUG|     utils:0153| [stdout] # [30] Test creation and deletion of trace instances	[PASS]
04/12 21:56:38 DEBUG|     utils:0153| [stdout] # [31] Kprobe dynamic event - adding and removing	[PASS]
04/12 21:56:42 DEBUG|     utils:0153| [stdout] # [32] Kprobe dynamic event - busy event check	[PASS]
04/12 21:56:49 DEBUG|     utils:0153| [stdout] # [33] Kprobe dynamic event with arguments	[PASS]
04/12 21:56:53 DEBUG|     utils:0153| [stdout] # [34] Kprobe event with comm arguments	[PASS]
04/12 21:56:57 DEBUG|     utils:0153| [stdout] # [35] Kprobe event string type argument	[PASS]
04/12 21:57:01 DEBUG|     utils:0153| [stdout] # [36] Kprobe event symbol argument	[PASS]
04/12 21:57:06 DEBUG|     utils:0153| [stdout] # [37] Kprobe event argument syntax	[PASS]
04/12 21:57:25 DEBUG|     utils:0153| [stdout] # [38] Kprobes event arguments with types	[PASS]
04/12 21:57:29 DEBUG|     utils:0153| [stdout] # [39] Kprobe event user-memory access	[PASS]
04/12 21:57:33 DEBUG|     utils:0153| [stdout] # [40] Kprobe event auto/manual naming	[PASS]
04/12 21:58:03 DEBUG|     utils:0153| [stdout] # [41] Kprobe dynamic event with function tracer	[PASS]
04/12 21:58:08 DEBUG|     utils:0153| [stdout] # [42] Kprobe event parser error log check	[PASS]
04/12 21:58:15 DEBUG|     utils:0153| [stdout] # [43] Kretprobe dynamic event with arguments	[PASS]
04/12 21:58:19 DEBUG|     utils:0153| [stdout] # [44] Kretprobe dynamic event with maxactive	[PASS]
04/12 21:58:24 DEBUG|     utils:0153| [stdout] # [45] Register/unregister many kprobe events	[FAIL]
04/12 21:58:32 DEBUG|     utils:0153| [stdout] # [46] Kprobe dynamic event - adding and removing	[PASS]
04/12 21:58:36 DEBUG|     utils:0153| [stdout] # [47] Uprobe event parser error log check	[PASS]
04/12 21:58:39 DEBUG|     utils:0153| [stdout] # [48] test for the preemptirqsoff tracer	[UNSUPPORTED]
04/12 21:58:59 DEBUG|     utils:0153| [stdout] # [49] Meta-selftest	[PASS]
04/12 21:59:12 DEBUG|     utils:0153| [stdout] # [50] Test wakeup tracer	[PASS]
04/12 21:59:35 DEBUG|     utils:0153| [stdout] # [51] Test wakeup RT tracer	[PASS]
04/12 21:59:50 DEBUG|     utils:0153| [stdout] # [52] event trigger - test inter-event histogram trigger expected fail actions	[XFAIL]
04/12 22:00:11 DEBUG|     utils:0153| [stdout] # [53] event trigger - test field variable support	[PASS]
04/12 22:00:30 DEBUG|     utils:0153| [stdout] # [54] event trigger - test multiple actions on hist trigger	[PASS]
04/12 22:00:38 DEBUG|     utils:0153| [stdout] # [55] event trigger - test inter-event histogram trigger onchange action	[PASS]
04/12 22:01:00 DEBUG|     utils:0153| [stdout] # [56] event trigger - test inter-event histogram trigger onmatch action	[PASS]
04/12 22:01:23 DEBUG|     utils:0153| [stdout] # [57] event trigger - test inter-event histogram trigger onmatch-onmax action	[PASS]
04/12 22:01:44 DEBUG|     utils:0153| [stdout] # [58] event trigger - test inter-event histogram trigger onmax action	[PASS]
04/12 22:01:52 DEBUG|     utils:0153| [stdout] # [59] event trigger - test inter-event histogram trigger snapshot action	[PASS]
04/12 22:02:07 DEBUG|     utils:0153| [stdout] # [60] event trigger - test synthetic_events syntax parser	[PASS]
04/12 22:02:30 DEBUG|     utils:0153| [stdout] # [61] event trigger - test inter-event histogram trigger trace action	[PASS]
04/12 22:02:34 DEBUG|     utils:0153| [stdout] # [62] event trigger - test event enable/disable trigger	[PASS]
04/12 22:02:38 DEBUG|     utils:0153| [stdout] # [63] event trigger - test trigger filter	[PASS]
04/12 22:02:42 DEBUG|     utils:0153| [stdout] # [64] event trigger - test histogram modifiers	[PASS]
04/12 22:02:46 DEBUG|     utils:0153| [stdout] # [65] event trigger - test multiple histogram triggers	[PASS]
04/12 22:02:54 DEBUG|     utils:0153| [stdout] # [66] event trigger - test snapshot-trigger	[PASS]
04/12 22:03:05 DEBUG|     utils:0153| [stdout] # [67] event trigger - test stacktrace-trigger	[PASS]
04/12 22:03:13 DEBUG|     utils:0153| [stdout] # [68] trace_marker trigger - test snapshot trigger	[PASS]
04/12 22:03:36 DEBUG|     utils:0153| [stdout] # [69] trace_marker trigger - test histogram with synthetic event against kernel event	[PASS]
04/12 22:03:55 DEBUG|     utils:0153| [stdout] # [70] trace_marker trigger - test histogram with synthetic event	[PASS]
04/12 22:03:59 DEBUG|     utils:0153| [stdout] # [71] event trigger - test traceon/off trigger	[PASS]
04/12 22:04:53 DEBUG|     utils:0153| [stdout] # [72] (instance)  Basic test for tracers	[PASS]
04/12 22:06:03 DEBUG|     utils:0153| [stdout] # [73] (instance)  Basic trace clock test	[PASS]
04/12 22:06:07 DEBUG|     utils:0153| [stdout] # [74] (instance)  Change the ringbuffer size	[PASS]
04/12 22:06:15 DEBUG|     utils:0153| [stdout] # [75] (instance)  Snapshot and tracing setting	[PASS]
04/12 22:06:19 DEBUG|     utils:0153| [stdout] # [76] (instance)  trace_pipe and trace_marker	[PASS]
04/12 22:06:31 DEBUG|     utils:0153| [stdout] # [77] (instance)  event tracing - enable/disable with event level files	[PASS]
04/12 22:06:46 DEBUG|     utils:0153| [stdout] # [78] (instance)  event tracing - restricts events based on pid	[PASS]
04/12 22:06:57 DEBUG|     utils:0153| [stdout] # [79] (instance)  event tracing - enable/disable with subsystem level files	[PASS]
04/12 22:07:03 DEBUG|     utils:0153| [stdout] # [80] (instance)  ftrace - stacktrace filter command	[PASS]
04/12 22:07:17 DEBUG|     utils:0153| [stdout] # [81] (instance)  ftrace - test for function event triggers	[PASS]
04/12 22:07:31 DEBUG|     utils:0153| [stdout] # [82] (instance)  ftrace - test for function traceon/off triggers	[PASS]
04/12 22:07:35 DEBUG|     utils:0153| [stdout] # [83] (instance)  event trigger - test event enable/disable trigger	[PASS]
04/12 22:07:39 DEBUG|     utils:0153| [stdout] # [84] (instance)  event trigger - test trigger filter	[PASS]
04/12 22:07:44 DEBUG|     utils:0153| [stdout] # [85] (instance)  event trigger - test histogram modifiers	[PASS]
04/12 22:07:48 DEBUG|     utils:0153| [stdout] # [86] (instance)  event trigger - test multiple histogram triggers	[PASS]
04/12 22:07:52 DEBUG|     utils:0153| [stdout] # [87] (instance)  trace_marker trigger - test snapshot trigger	[PASS]
04/12 22:07:53 DEBUG|     utils:0153| [stdout] # 
04/12 22:07:56 DEBUG|     utils:0153| [stdout] # 
04/12 22:07:56 DEBUG|     utils:0153| [stdout] # # of passed:  84
04/12 22:07:56 DEBUG|     utils:0153| [stdout] # # of failed:  1
04/12 22:07:56 DEBUG|     utils:0153| [stdout] # # of unresolved:  0
04/12 22:07:56 DEBUG|     utils:0153| [stdout] # # of untested:  0
04/12 22:07:56 DEBUG|     utils:0153| [stdout] # # of unsupported:  1
04/12 22:07:56 DEBUG|     utils:0153| [stdout] # # of xfailed:  1
04/12 22:07:56 DEBUG|     utils:0153| [stdout] # # of undefined(test bug):  0
04/12 22:07:56 DEBUG|     utils:0153| [stdout] not ok 1 selftests: ftrace: ftracetest # exit=1
04/12 22:07:56 DEBUG|     utils:0153| [stdout] make[1]: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/ftrace'
04/12 22:07:56 DEBUG|     utils:0153| [stdout] make: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests'
04/12 22:07:56 INFO |ubuntu_ker:0189| ========== Summary ===========