[PATCH] D147842: [Docs][llvm-exegesis] Add documentation for --use-dummy-perf-counters

[Aiden Grossman via Phabricator via llvm-commits]

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This patch adds in documentation for the --use-dummy-perf-counters
option (introduced in D146301 <https://reviews.llvm.org/D146301>).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D147842

Files:
  llvm/docs/CommandGuide/llvm-exegesis.rst


Index: llvm/docs/CommandGuide/llvm-exegesis.rst
===================================================================
--- llvm/docs/CommandGuide/llvm-exegesis.rst
+++ llvm/docs/CommandGuide/llvm-exegesis.rst
@@ -362,6 +362,13 @@
  If set,  llvm-exegesis will dump the generated code to a temporary file to
  enable code inspection. Disabled by default.
 
+.. option:: --use-dummpy-perf-counters
+
+ If set, llvm-exegesis will not read any real performance counters and
+ return a dummy value instead. This can be used to ensure a snippet doesn't
+ crash when hardware performance counters are unavailable and for
+ debugging :program:`llvm-exegesis` itself.
+
 EXIT STATUS
 -----------
 


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