[SR-6792] dispatch_group test is timing out on a fairly regular basis

[rudkx]

Previous ID	SR-6792
Radar	rdar://problem/43855026
Original Reporter	@rudkx
Type	Bug

Additional Detail from JIRA

Votes	0
Component/s	libdispatch
Labels	Bug
Assignee	dgrove-oss (JIRA)
Priority	Medium

md5: d32790732ea962b5a8df4dce61824635

is duplicated by:

• SR-8664 dispatch_group test timed out on ci.swift.org Ubuntu 14.04

Issue Description:

https://ci.swift.org/job/oss-swift-4.1-incremental-RA-linux-ubuntu-16_10/753/

Test project /home/buildnode/jenkins/workspace/oss-swift-4.1-incremental-RA-linux-ubuntu-16_10/buildbot_incremental/libdispatch-linux-x86_64 Start 1: dispatch_apply 1/21 
Test #​1: dispatch_apply ................... Passed 0.25 sec Start 2: dispatch_api 2/21 
Test #​2: dispatch_api ..................... Passed 0.17 sec Start 3: dispatch_debug 3/21 
Test #​3: dispatch_debug ................... Passed 0.15 sec Start 4: dispatch_queue_finalizer 4/21 
Test #​4: dispatch_queue_finalizer ......... Passed 1.18 sec Start 5: dispatch_group 5/21 
Test #​5: dispatch_group ...................***Timeout 30.07 sec Start 6: dispatch_overcommit 6/21 
Test #​6: dispatch_overcommit .............. Passed 0.68 sec Start 7: dispatch_context_for_key 7/21 
Test #​7: dispatch_context_for_key ......... Passed 0.20 sec Start 8: dispatch_after 8/21 
Test #​8: dispatch_after ................... Passed 9.17 sec Start 9: dispatch_timer 9/21 
Test #​9: dispatch_timer ................... Passed 2.16 sec Start 10: dispatch_timer_short 10/21 Test #​10: dispatch_timer_short ............. Passed 1.44 sec Start 11: dispatch_timer_timeout 11/21 
Test #​11: dispatch_timer_timeout ........... Passed 6.17 sec Start 12: dispatch_sema 12/21 Test #​12: dispatch_sema .................... Passed 0.18 sec Start 13: dispatch_timer_bit31 13/21 
Test #​13: dispatch_timer_bit31 ............. Passed 2.32 sec Start 14: dispatch_timer_bit63 14/21 
Test #​14: dispatch_timer_bit63 ............. Passed 1.16 sec Start 15: dispatch_timer_set_time 15/21 
Test #​15: dispatch_timer_set_time .......... Passed 2.47 sec Start 16: dispatch_starfish 16/21 Test #​16: dispatch_starfish ................ Passed 7.83 sec Start 17: dispatch_data 17/21 
Test #​17: dispatch_data .................... Passed 0.16 sec Start 18: dispatch_io_net 18/21 
Test #​18: dispatch_io_net .................. Passed 0.43 sec Start 19: dispatch_select 19/21 
Test #​19: dispatch_select .................. Passed 0.19 sec Start 20: dispatch_c99 20/21 
Test #​20: dispatch_c99 ..................... Passed 0.19 sec Start 21: dispatch_plusplus 21/21 Test #​21: dispatch_plusplus ................ Passed 0.19 sec

[belkadan]

cc ktopley-apple (JIRA User)

[swift-ci]

Comment by David Grove (JIRA)

This PR increases the test timeout to 120 seconds (from 30 seconds) under the assumption that we're seeing noise due to load on CI machines, not a real problem. #330

[swift-ci]

Comment by David Grove (JIRA)

@belkadan merged the PR to increase the timeout to 120 seconds. If we still see a timeout at 120 seconds, then it is probably a real bug (or at least a significant performance regression) that should be investigated. I wouldn't suggest raising the timeout again.

[belkadan]

Okay, it looks like in addition to the timeout there's also a failure: https://ci.swift.org/view/Dashboard/job/oss-swift-incremental-RA-linux-ubuntu-16_04/2684/ . Any ideas?

[belkadan]

This is still happening. https://ci.swift.org/view/Dashboard/job/oss-swift-4.2-package-linux-ubuntu-14_04/618/