Output overridden cache sizes.

PiperOrigin-RevId: 741560798
Change-Id: I296b97987b04038777fde39131a0d939bff6217d

Author: andreas-abel

fleetbench/common/common.cc

@@ -268,4 +268,21 @@ bool UseExplicitIterationCounts() {
          !FindInCommandLine("--benchmark_list_tests");
 }
 
+bool FleetbenchReporter::ReportContext(
+    const benchmark::BenchmarkReporter::Context& context) {
+  reporter_->SetOutputStream(&this->GetOutputStream());
+  reporter_->SetErrorStream(&this->GetErrorStream());
+  bool result = reporter_->ReportContext(context);
+  if (absl::GetFlag(FLAGS_L1_data_size).has_value() ||
+      absl::GetFlag(FLAGS_L2_size).has_value() ||
+      absl::GetFlag(FLAGS_L3_size).has_value()) {
+    auto& err = this->GetErrorStream();
+    err << "Effective CPU Cache Sizes:\n";
+    err << "  L1 Data " << GetCacheSize(1, "Data") / 1024 << " KiB\n";
+    err << "  L2 " << GetCacheSize(2) / 1024 << " KiB\n";
+    err << "  L3 " << GetCacheSize(3) / 1024 << " KiB\n";
+  }
+  return result;
+}
+
 }  // namespace fleetbench

fleetbench/common/common.h

@@ -117,12 +117,7 @@ class FleetbenchReporter : public benchmark::BenchmarkReporter {
     reporter_->ReportRunsConfig(min_time, has_explicit_iters, iters);
   }
 
-  bool ReportContext(
-      const benchmark::BenchmarkReporter::Context& context) override {
-    reporter_->SetOutputStream(&this->GetOutputStream());
-    reporter_->SetErrorStream(&this->GetErrorStream());
-    return reporter_->ReportContext(context);
-  }
+  bool ReportContext(const benchmark::BenchmarkReporter::Context&) override;
 
   void Finalize() override { reporter_->Finalize(); }