[llvm] [llvm-exegesis] Error Out If Perf Counter is Not Fully Enabled (PR #132892)

[Min-Yih Hsu via llvm-commits]

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@@ -76,6 +76,19 @@ class SnippetSignal : public SnippetExecutionFailure {
   int SignalNumber;
 };
 
+// A class representing a case where a perf counter was only partially
+// scheduled, most likely due to perf counter contention.
+class PerfCounterNotFullyEnabled
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mshockwave wrote:

nit: use struct instead as every members is public

https://github.com/llvm/llvm-project/pull/132892