[PATCH] D78030: [TimeProfiler] Emit clock synchronization point

[Fangrui Song via Phabricator via cfe-commits]

MaskRay added inline comments.


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Comment at: llvm/lib/Support/TimeProfiler.cpp:266
+      const auto BeginningOfTimeUs = SystemTime - ProcessLocalTime;
+      J.attribute("beginningOfTime",
+                  BeginningOfTimeUs.time_since_epoch().count());
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What is the logic here?

Two events in the same process may have different `beginningOfTime`. Is that intended?

Noe that `system_clock::now()` and `steady_clock::now()` are not measured at the same time.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D78030/new/

https://reviews.llvm.org/D78030