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-rw-r--r--pkg/tcpip/transport/tcp/tcp_rack_test.go6
1 files changed, 5 insertions, 1 deletions
diff --git a/pkg/tcpip/transport/tcp/tcp_rack_test.go b/pkg/tcpip/transport/tcp/tcp_rack_test.go
index 5cdd5b588..81e7dc36e 100644
--- a/pkg/tcpip/transport/tcp/tcp_rack_test.go
+++ b/pkg/tcpip/transport/tcp/tcp_rack_test.go
@@ -33,6 +33,7 @@ const (
tsOptionSize = 12
maxTCPOptionSize = 40
mtu = header.TCPMinimumSize + header.IPv4MinimumSize + maxTCPOptionSize + maxPayload
+ latency = 5 * time.Millisecond
)
func setStackRACKPermitted(t *testing.T, c *context.Context) {
@@ -182,6 +183,9 @@ func sendAndReceiveWithSACK(t *testing.T, c *context.Context, numPackets int, en
for i := 0; i < numPackets; i++ {
c.ReceiveAndCheckPacketWithOptions(data, bytesRead, maxPayload, tsOptionSize)
bytesRead += maxPayload
+ // This delay is added to increase RTT as low RTT can cause TLP
+ // before sending ACK.
+ time.Sleep(latency)
}
return data
@@ -479,7 +483,7 @@ func TestRACKOnePacketTailLoss(t *testing.T) {
}{
// #3 was retransmitted as TLP.
{tcpStats.FastRetransmit, "stats.TCP.FastRetransmit", 0},
- {tcpStats.SACKRecovery, "stats.TCP.SACKRecovery", 0},
+ {tcpStats.SACKRecovery, "stats.TCP.SACKRecovery", 1},
{tcpStats.TLPRecovery, "stats.TCP.TLPRecovery", 0},
// RTO should not have fired.
{tcpStats.Timeouts, "stats.TCP.Timeouts", 0},