[PATCH] D28789: [lit] Support sharding testsuites, for parallel execution.

[Graydon Hoare via Phabricator via llvm-commits]

graydon updated this revision to Diff 84797.
graydon added a comment.

Update to round-robin sharding

The previous approach would split a testsuite like [1, 2, 3, 4, 5] into 3
shards [1, 2], [3, 4], and [5]. This change will split it into 3 shards
[1, 4, [2, 5], and [3]. That is, it takes "every Nth test" rather than
"the next N tests" for each shard.

Also fixed the tests to actually run FileCheck.


https://reviews.llvm.org/D28789

Files:
  docs/CommandGuide/lit.rst
  utils/lit/lit/main.py
  utils/lit/tests/selecting.py

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