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2d00d56fbd
Summary: ^ Reviewed By: yangchi Differential Revision: D21956286 fbshipit-source-id: 305b879ad11df23aae8e0c3aac4645c0136b3012
77 lines
2.6 KiB
C++
77 lines
2.6 KiB
C++
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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*/
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#include <quic/congestion_control/CongestionControlFunctions.h>
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#include <folly/portability/GTest.h>
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#include <quic/QuicConstants.h>
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#include <quic/state/StateData.h>
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using namespace testing;
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namespace quic {
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namespace test {
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class CongestionControlFunctionsTest : public Test {};
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TEST_F(CongestionControlFunctionsTest, CalculatePacingRate) {
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QuicConnectionStateBase conn(QuicNodeType::Client);
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conn.udpSendPacketLen = 1;
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conn.transportSettings.minBurstPackets = 1;
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conn.transportSettings.pacingTimerTickInterval = 10ms;
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std::chrono::microseconds rtt(1000 * 100);
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auto result =
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calculatePacingRate(conn, 50, conn.transportSettings.minCwndInMss, rtt);
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EXPECT_EQ(10ms, result.interval);
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EXPECT_EQ(5, result.burstSize);
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conn.transportSettings.pacingTimerTickInterval = 1ms;
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auto result2 =
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calculatePacingRate(conn, 300, conn.transportSettings.minCwndInMss, rtt);
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EXPECT_EQ(1ms, result2.interval);
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EXPECT_EQ(3, result2.burstSize);
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}
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TEST_F(CongestionControlFunctionsTest, MinPacingRate) {
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QuicConnectionStateBase conn(QuicNodeType::Client);
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conn.udpSendPacketLen = 1;
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conn.transportSettings.pacingTimerTickInterval = 1ms;
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auto result = calculatePacingRate(
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conn, 100, conn.transportSettings.minCwndInMss, 100ms);
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// 100 ms rtt, 1ms tick interval, 100 mss cwnd, 5 mss min burst -> 5 mss every
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// 5ms
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EXPECT_EQ(5ms, result.interval);
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EXPECT_EQ(conn.transportSettings.minBurstPackets, result.burstSize);
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}
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TEST_F(CongestionControlFunctionsTest, SmallCwnd) {
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QuicConnectionStateBase conn(QuicNodeType::Client);
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conn.udpSendPacketLen = 1;
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conn.transportSettings.minBurstPackets = 1;
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conn.transportSettings.pacingTimerTickInterval = 1ms;
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auto result = calculatePacingRate(
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conn, 10, conn.transportSettings.minCwndInMss, 100000us);
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EXPECT_EQ(10ms, result.interval);
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EXPECT_EQ(1, result.burstSize);
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}
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TEST_F(CongestionControlFunctionsTest, RttSmallerThanInterval) {
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QuicConnectionStateBase conn(QuicNodeType::Client);
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conn.udpSendPacketLen = 1;
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conn.transportSettings.minBurstPackets = 1;
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conn.transportSettings.pacingTimerTickInterval = 10ms;
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auto result =
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calculatePacingRate(conn, 10, conn.transportSettings.minCwndInMss, 1ms);
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EXPECT_EQ(std::chrono::milliseconds::zero(), result.interval);
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EXPECT_EQ(
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conn.transportSettings.writeConnectionDataPacketsLimit, result.burstSize);
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}
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} // namespace test
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} // namespace quic
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