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| author | Clement Courbet <courbet@google.com> | 2020-02-06 12:08:02 +0100 |
|---|---|---|
| committer | Clement Courbet <courbet@google.com> | 2020-02-06 13:42:12 +0100 |
| commit | 89a66474b6c1e5843c3dbc96bde52e5a7076c6cc (patch) | |
| tree | 219dd89c10a0d4ecb9bd8c82c396e2d8f56a1d95 /llvm/docs/CommandGuide | |
| parent | e7cb374433095219069ef767f70c0c9159a65b7c (diff) | |
| download | llvm-89a66474b6c1e5843c3dbc96bde52e5a7076c6cc.zip llvm-89a66474b6c1e5843c3dbc96bde52e5a7076c6cc.tar.gz llvm-89a66474b6c1e5843c3dbc96bde52e5a7076c6cc.tar.bz2 | |
[llvm-exegesis] Document `repetition-mode`.
Reviewers: gchatelet
Subscribers: tschuett, mstojanovic, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D74114
Diffstat (limited to 'llvm/docs/CommandGuide')
| -rw-r--r-- | llvm/docs/CommandGuide/llvm-exegesis.rst | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/llvm/docs/CommandGuide/llvm-exegesis.rst b/llvm/docs/CommandGuide/llvm-exegesis.rst index 81e92e7..0a5b099 100644 --- a/llvm/docs/CommandGuide/llvm-exegesis.rst +++ b/llvm/docs/CommandGuide/llvm-exegesis.rst @@ -184,10 +184,10 @@ OPTIONS a comma-separated list. See example 1 for details. Either `opcode-index`, `opcode-name` or `snippets-file` must be set. - .. option:: -snippets-file=<filename> +.. option:: -snippets-file=<filename> - Specify the custom code snippet to measure. See example 2 for details. - Either `opcode-index`, `opcode-name` or `snippets-file` must be set. + Specify the custom code snippet to measure. See example 2 for details. + Either `opcode-index`, `opcode-name` or `snippets-file` must be set. .. option:: -mode=[latency|uops|inverse_throughput|analysis] @@ -195,6 +195,15 @@ OPTIONS to specify at least one of the `-analysis-clusters-output-file=` and `-analysis-inconsistencies-output-file=`. +.. option:: -repetition-mode=[duplicate|loop] + + Specify the repetition mode. `duplicate` will create a large, straight line + basic block with `num-repetitions` copies of the snippet. `loop` will wrap + the snippet in a loop which will be run `num-repetitions` times. The `loop` + mode tends to better hide the effects of the CPU frontend on architectures + that cache decoded instructions, but consumes a register for counting + iterations. + .. option:: -num-repetitions=<Number of repetitions> Specify the number of repetitions of the asm snippet. |