ftrace test timed out on Cosmic P8

[Po-Hsu Lin]

It took about 17 minute to finish the ftrace test in ubuntu_kernel_selftests:

  [58] (instance) event trigger - test multiple histogram triggers [PASS]
  [59] (instance) trace_marker trigger - test snapshot trigger [PASS]

  # of passed: 59
  # of failed: 0
  # of unresolved: 0
  # of untested: 0
  # of unsupported: 0
  # of xfailed: 0
  # of undefined(test bug): 0
  6.26user 50.41system 16:20.26elapsed 5%CPU (0avgtext+0avgdata 6016maxresident)k

With the current setting, the test will get killed:
 [44] trace_marker trigger - test histogram with synthetic event against kernel event [PASS]
 [45] trace_marker trigger - test histogram with synthetic event [PASS]
 [46] event trigger - test traceon/off trigger [PASS]
 [47] (instance) Basic test for tracers [PASS]
 Timer expired (900 sec.), nuking pid 35498
 ERROR ubuntu_kernel_selftests.ftrace ubuntu_kernel_selftests.ftrace timestamp=1548649668 localtime=Jan 28 04:27:48 Test timeout expired, rc=15

We need to adjust the timeout setting.

[Po-Hsu Lin (cypressyew)]

We have some test disabled,

https://kernel.ubuntu.com/git/ubuntu/autotest-client-tests.git/commit/?id=a02ccfa8d9f5e311bc22b0c091ea1e26b7daf4ec

Need to retest this to see if it will still times out.

[Po-Hsu Lin (cypressyew)]

With that test disabled in comment #1, it still took about >15 minutes to run.

So yes we need to enlarge the timeout threshold.

[Po-Hsu Lin (cypressyew)]

https://kernel.ubuntu.com/git/ubuntu/autotest-client-tests.git/commit/?id=706415c41bc02b4a11964e1220496126a6f7a08a