Public bug reported:

Issue found on amd64 node onibi.

Fail rate: 2 out of 3 attempts.

 Running 
'/home/ubuntu/autotest/client/tests/ubuntu_ftrace_smoke_test/ubuntu_ftrace_smoke_test.sh'
 PASSED (CONFIG_FUNCTION_TRACER=y in /boot/config-5.3.0-19-lowlatency)
 PASSED (CONFIG_FUNCTION_GRAPH_TRACER=y in /boot/config-5.3.0-19-lowlatency)
 PASSED (CONFIG_STACK_TRACER=y in /boot/config-5.3.0-19-lowlatency)
 PASSED (CONFIG_DYNAMIC_FTRACE=y in /boot/config-5.3.0-19-lowlatency)
 PASSED all expected /sys/kernel/debug/tracing files exist
 PASSED (function_graph in /sys/kernel/debug/tracing/available_tracers)
 PASSED (function in /sys/kernel/debug/tracing/available_tracers)
 PASSED (nop in /sys/kernel/debug/tracing/available_tracers)
 PASSED (function can be enabled)
 PASSED (function_graph can be enabled)
 TIMER END Mon Oct 28 06:09:18 UTC 2019
 TIMEOUT
 FAILED: aborting, timeout, took way too long to complete


Didn't see this issue with the generic kernel (only 1 attempt though)

** Affects: ubuntu-kernel-tests
     Importance: Undecided
         Status: New

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Incomplete


** Tags: 5.3 amd64 bionic sru-20190930 ubuntu-ftrace-smoke-test

** Tags added: 5.3 amd64 bionic sru-20191021 ubuntu-ftrace-smoke-test

** Tags removed: sru-20191021
** Tags added: sru-20190930

** Also affects: linux (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1850138

Title:
  ubuntu_ftrace_smoke_test is failing sporadically on B-hwe-edge
  lowlatency amd64

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