Simplify profiling and benchmarks.

- Tweak the benchmarks to work with b.N where appropriate. In many cases,
  b.N was simply being ignored. This creates an implicit dependency in the
  user passing a reasonable benchtime (less than or equal to the actual
  runtime of the test, or using the X syntax) otherwise the test runs
  forever.
- In cases where the above is impossible, explicitly set benchtime from
  the test wrapper, to prevent the above behavior (tensorflow).
- Drop the *Reverse variants, which are simply hey benchmarks. We should
  just add a hey benchmark. The platforms benchmarks already include a
  native platform, and thus these benchmarks are incredibly confusing.
  (In other words, BenchmarkNginxReverse has nothing to do with an nginx
  benchmark for runsc.)
- Remove the redunant Harness object, which contains no state, in order
  to slightly simplify the code.
- Make Block and Heap profiling actually work, but setting appropriate
  runtime parameters (and plumbing them through the config).
- Split the profiling into two phases: start and stop, since some will
  need to be started early, and others will need to happen at the end.

PiperOrigin-RevId: 349495377

1 files changed, 5 insertions, 7 deletions

diff --git a/test/benchmarks/base/startup_test.go b/test/benchmarks/base/startup_test.go
index 8ef9f99c4..05a43ad17 100644
--- a/test/benchmarks/base/startup_test.go
+++ b/test/benchmarks/base/startup_test.go
@@ -25,11 +25,9 @@ import (
 	"gvisor.dev/gvisor/test/benchmarks/harness"
 )
 
-var testHarness harness.Harness
-
 // BenchmarkStartEmpty times startup time for an empty container.
 func BenchmarkStartupEmpty(b *testing.B) {
-	machine, err := testHarness.GetMachine()
+	machine, err := harness.GetMachine()
 	if err != nil {
 		b.Fatalf("failed to get machine: %v", err)
 	}
@@ -53,7 +51,7 @@ func BenchmarkStartupEmpty(b *testing.B) {
 // Time is measured from start until the first request is served.
 func BenchmarkStartupNginx(b *testing.B) {
 	// The machine to hold Nginx and the Node Server.
-	machine, err := testHarness.GetMachine()
+	machine, err := harness.GetMachine()
 	if err != nil {
 		b.Fatalf("failed to get machine with: %v", err)
 	}
@@ -76,7 +74,7 @@ func BenchmarkStartupNginx(b *testing.B) {
 // Time is measured from start until the first request is served.
 // Note that the Node app connects to a Redis instance before serving.
 func BenchmarkStartupNode(b *testing.B) {
-	machine, err := testHarness.GetMachine()
+	machine, err := harness.GetMachine()
 	if err != nil {
 		b.Fatalf("failed to get machine with: %v", err)
 	}
@@ -126,8 +124,8 @@ func runServerWorkload(ctx context.Context, b *testing.B, args base.ServerArgs)
 				return fmt.Errorf("failed to get ip from server: %v", err)
 			}
 
-			harness.DebugLog(b, "Waiting for container to start.")
 			// Wait until the Client sees the server as up.
+			harness.DebugLog(b, "Waiting for container to start.")
 			if err := harness.WaitUntilServing(ctx, args.Machine, servingIP, args.Port); err != nil {
 				return fmt.Errorf("failed to wait for serving: %v", err)
 			}
@@ -141,6 +139,6 @@ func runServerWorkload(ctx context.Context, b *testing.B, args base.ServerArgs)
 
 // TestMain is the main method for package network.
 func TestMain(m *testing.M) {
-	testHarness.Init()
+	harness.Init()
 	os.Exit(m.Run())
 }