commit f0feebbe609f77290677b71e2152331d834dc5e7
author Oystein Eftevaag <oysteine@google.com> Wed Mar 20 12:48:50 2024 -0700
committer Oystein Eftevaag <oysteine@google.com> Tue Apr 09 13:54:30 2024 -0700
tree efdf5a6322fdf71485f07531d7554b9353b4bf1d
parent 17624a369fe8fa1f635be5fabbfd69053be8cefe

Upstreamed BUILTIN_CLOCK_TSC clocksource

Change-Id: If9f863585bfe787607c74aea08a8a1be9fb55d46

src/tracing/core/clock_snapshots.cc

diff --git a/src/tracing/core/clock_snapshots.cc b/src/tracing/core/clock_snapshots.cc
index 98fe7c5..a4fe6c0 100644
--- a/src/tracing/core/clock_snapshots.cc
+++ b/src/tracing/core/clock_snapshots.cc
@@ -66,6 +66,12 @@
       ClockReading(protos::pbzero::BUILTIN_CLOCK_MONOTONIC, wall_time_ns));
 #endif
 
+#if PERFETTO_BUILDFLAG(PERFETTO_ARCH_CPU_X86_64)
+  // X86-specific but OS-independent TSC clocksource
+  snapshot_data.push_back(
+      ClockReading(protos::pbzero::BUILTIN_CLOCK_TSC, base::Rdtsc()));
+#endif  // PERFETTO_BUILDFLAG(PERFETTO_ARCH_CPU_X86_64)
+
   return snapshot_data;
 }