By default, trying to profile MotionMark may sometimes result in the profile being cut off before the test finishes due to file size issues. Support for subtests was added with https://bugs.webkit.org/show_bug.cgi?id=247907, so subtests should be enabled for MotionMark and profiling support should require a subtest to be specified (to avoid the test cutting off). Also, the test should support signposting to help label generated profiles. It may be useful to label both the warmup and the test-ready phases.
<rdar://problem/103522107>
Pull request: https://github.com/WebKit/WebKit/pull/14717
Committed 264951@main (7627468cdd1d): <https://commits.webkit.org/264951@main> Reviewed commits have been landed. Closing PR #14717 and removing active labels.