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+# libdatachannel - client-benchmark
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+
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+This directory contains a native client to open Data Channels with WebSocket signaling using libdatachannel and benchmark functionalities. It offers two functionalities;
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+- Benchmark: Bi-directional data transfer benchmark (Also supports One-Way testing)
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+- Constant Throughput Set: Send desired amount of data per second
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+
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+## Start Signaling Server
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+- Start one of the signaling server from the examples folder. For example start `signaling-server-nodejs` like;
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+ - `cd examples/signaling-server-nodejs/`
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+ - `npm i`
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+ - `npm run start `
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+
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+## Start `client-benchmark` Applications
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+
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+Start 2 applications by using example calls below. Than copy one of the client's ID and paste to the other peer's screen to start offering process.
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+
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+## Usage Examples
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+
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+### Benchmark for 300 seconds
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+
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+> `./client-benchmark -d 300`
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+
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+Example Output (Offering Peer's Output);
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+```bash
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+Stun server is stun:stun.l.google.com:19302
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+The local ID is: EQmF
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+Url is ws://localhost:8000/EQmF
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+Waiting for signaling to be connected...
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+2021-03-25 14:21:58.045 INFO [21386] [rtc::impl::TcpTransport::connect@159] Connected to localhost:8000
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+2021-03-25 14:21:58.045 INFO [21386] [rtc::impl::TcpTransport::runLoop@327] TCP connected
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+2021-03-25 14:21:58.046 INFO [21386] [rtc::impl::WsTransport::incoming@118] WebSocket open
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+WebSocket connected, signaling ready
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+Enter a remote ID to send an offer:
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+0tDf
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+Offering to 0tDf
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+Creating DataChannel with label "benchmark"
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+2021-03-25 14:22:07.972 INFO [21379] [rtc::impl::IceTransport::IceTransport@106] Using STUN server "stun.l.google.com:19302"
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+2021-03-25 14:22:07.973 INFO [21379] [rtc::impl::PeerConnection::changeSignalingState@992] Changed signaling state to new
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+2021-03-25 14:22:07.973 INFO [21379] [rtc::impl::PeerConnection::changeGatheringState@981] Changed gathering state to in-progress
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+Gathering State: in-progress
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+2021-03-25 14:22:07.974 INFO [21379] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:787: Changing state to gathering
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+2021-03-25 14:22:07.974 WARN [21379] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:239: Local description already has the maximum number of host candidates
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+Benchmark will run for 300 seconds
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+2021-03-25 14:22:07.976 INFO [21396] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:787: Changing state to connecting
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+2021-03-25 14:22:07.976 INFO [21396] [rtc::impl::PeerConnection::changeState@964] Changed state to connecting
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+State: connecting
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+2021-03-25 14:22:08.055 INFO [21396] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:610: Using STUN server stun.l.google.com:19302
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+2021-03-25 14:22:08.055 INFO [21386] [rtc::impl::PeerConnection::changeSignalingState@992] Changed signaling state to connecting
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+2021-03-25 14:22:08.105 WARN [21396] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:426: Send failed, errno=101
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+2021-03-25 14:22:08.105 WARN [21396] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:1483: STUN message send failed, errno=101
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+2021-03-25 14:22:08.105 INFO [21396] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:843: STUN binding failed
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+2021-03-25 14:22:08.107 INFO [21396] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:1302: STUN server binding successful
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+2021-03-25 14:22:08.107 INFO [21396] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:2148: Candidate gathering done
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+2021-03-25 14:22:08.107 INFO [21396] [rtc::impl::PeerConnection::changeGatheringState@981] Changed gathering state to complete
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+Gathering State: complete
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+2021-03-25 14:22:08.155 INFO [21396] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:787: Changing state to connected
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+2021-03-25 14:22:08.206 INFO [21396] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:787: Changing state to completed
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+#1 Received: 0 KB/s Sent: 0 KB/s BufferSize: 0
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+2021-03-25 14:22:09.059 INFO [21399] [rtc::impl::DtlsTransport::runRecvLoop@503] DTLS handshake finished
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+2021-03-25 14:22:09.069 INFO [21382] [rtc::impl::SctpTransport::processNotification@708] SCTP connected
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+2021-03-25 14:22:09.069 INFO [21382] [rtc::impl::PeerConnection::changeState@964] Changed state to connected
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+State: connected
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+DataChannel from 0tDf open
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+#2 Received: 41488 KB/s Sent: 42465 KB/s BufferSize: 65535
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+#3 Received: 43925 KB/s Sent: 43729 KB/s BufferSize: 65535
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+#4 Received: 42491 KB/s Sent: 42361 KB/s BufferSize: 65535
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+#5 Received: 45878 KB/s Sent: 45682 KB/s BufferSize: 65535
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+Stats# Received Total: 174 MB Sent Total: 175 MB RTT: 17 ms
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+
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+#6 Received: 43665 KB/s Sent: 43599 KB/s BufferSize: 65535
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+#7 Received: 45749 KB/s Sent: 45488 KB/s BufferSize: 65535
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+#8 Received: 44055 KB/s Sent: 44055 KB/s BufferSize: 65535
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+#9 Received: 21572 KB/s Sent: 58199 KB/s BufferSize: 65535
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+#10 Received: 22940 KB/s Sent: 55005 KB/s BufferSize: 65535
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+Stats# Received Total: 353 MB Sent Total: 422 MB RTT: 15 ms
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+
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+#11 Received: 27501 KB/s Sent: 53112 KB/s BufferSize: 65535
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+#12 Received: 29914 KB/s Sent: 48162 KB/s BufferSize: 65535
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+#13 Received: 31869 KB/s Sent: 45946 KB/s BufferSize: 65535
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+#14 Received: 22484 KB/s Sent: 53636 KB/s BufferSize: 65535
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+#15 Received: 16294 KB/s Sent: 56833 KB/s BufferSize: 65535
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+Stats# Received Total: 482 MB Sent Total: 682 MB RTT: 13 ms
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+```
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+
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+### Benchmark for 300 seconds (Only Send, One Way)
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+
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+Start first peer as;
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+> `./client-benchmark -d 300 -o`
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+
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+Start second peer as;
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+> `./client-benchmark -d 300`
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+
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+Example Output (Offering Peer's Output);
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+```bash
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+Stun server is stun:stun.l.google.com:19302
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+The local ID is: XLLn
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+Url is ws://localhost:8000/XLLn
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+Waiting for signaling to be connected...
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+2021-03-25 14:34:24.479 INFO [22332] [rtc::impl::TcpTransport::connect@159] Connected to localhost:8000
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+2021-03-25 14:34:24.479 INFO [22332] [rtc::impl::TcpTransport::runLoop@327] TCP connected
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+2021-03-25 14:34:24.479 INFO [22332] [rtc::impl::WsTransport::incoming@118] WebSocket open
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+WebSocket connected, signaling ready
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+Enter a remote ID to send an offer:
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+Okt4
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+Offering to Okt4
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+Creating DataChannel with label "benchmark"
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+2021-03-25 14:34:37.948 INFO [22325] [rtc::impl::IceTransport::IceTransport@106] Using STUN server "stun.l.google.com:19302"
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+2021-03-25 14:34:37.949 INFO [22325] [rtc::impl::PeerConnection::changeSignalingState@992] Changed signaling state to new
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+2021-03-25 14:34:37.949 INFO [22325] [rtc::impl::PeerConnection::changeGatheringState@981] Changed gathering state to in-progress
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+Gathering State: in-progress
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+2021-03-25 14:34:37.950 INFO [22325] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:787: Changing state to gathering
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+2021-03-25 14:34:37.951 WARN [22325] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:239: Local description already has the maximum number of host candidates
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+Benchmark will run for 300 seconds
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+2021-03-25 14:34:37.952 INFO [22334] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:787: Changing state to connecting
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+2021-03-25 14:34:37.952 INFO [22334] [rtc::impl::PeerConnection::changeState@964] Changed state to connecting
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+State: connecting
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+2021-03-25 14:34:37.969 INFO [22334] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:610: Using STUN server stun.l.google.com:19302
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+2021-03-25 14:34:37.969 INFO [22332] [rtc::impl::PeerConnection::changeSignalingState@992] Changed signaling state to connecting
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+2021-03-25 14:34:37.970 INFO [22334] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:787: Changing state to connected
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+2021-03-25 14:34:37.971 INFO [22337] [rtc::impl::DtlsTransport::runRecvLoop@503] DTLS handshake finished
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+2021-03-25 14:34:37.977 INFO [22327] [rtc::impl::SctpTransport::processNotification@708] SCTP connected
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+2021-03-25 14:34:37.977 INFO [22327] [rtc::impl::PeerConnection::changeState@964] Changed state to connected
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+State: connected
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+DataChannel from Okt4 open
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+2021-03-25 14:34:38.019 WARN [22334] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:426: Send failed, errno=101
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+2021-03-25 14:34:38.019 WARN [22334] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:1483: STUN message send failed, errno=101
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+2021-03-25 14:34:38.019 INFO [22334] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:843: STUN binding failed
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+2021-03-25 14:34:38.022 INFO [22334] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:1302: STUN server binding successful
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+2021-03-25 14:34:38.022 INFO [22334] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:2148: Candidate gathering done
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+2021-03-25 14:34:38.022 INFO [22334] [rtc::impl::PeerConnection::changeGatheringState@981] Changed gathering state to complete
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+Gathering State: complete
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+2021-03-25 14:34:38.069 INFO [22334] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:787: Changing state to completed
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+#1 Received: 0 KB/s Sent: 92223 KB/s BufferSize: 65535
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+#2 Received: 0 KB/s Sent: 89291 KB/s BufferSize: 65535
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+#3 Received: 0 KB/s Sent: 95087 KB/s BufferSize: 65535
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+#4 Received: 0 KB/s Sent: 101050 KB/s BufferSize: 65535
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+#5 Received: 0 KB/s Sent: 99778 KB/s BufferSize: 0
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+Stats# Received Total: 0 MB Sent Total: 480 MB RTT: 8 ms
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+
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+#6 Received: 0 KB/s Sent: 100366 KB/s BufferSize: 65535
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+#7 Received: 0 KB/s Sent: 101201 KB/s BufferSize: 65535
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+#8 Received: 0 KB/s Sent: 100892 KB/s BufferSize: 65535
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+#9 Received: 0 KB/s Sent: 101288 KB/s BufferSize: 65535
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+#10 Received: 0 KB/s Sent: 95676 KB/s BufferSize: 65535
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+Stats# Received Total: 0 MB Sent Total: 982 MB RTT: 8 ms
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+
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+#11 Received: 0 KB/s Sent: 96254 KB/s BufferSize: 65535
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+#12 Received: 0 KB/s Sent: 105473 KB/s BufferSize: 65535
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+#13 Received: 0 KB/s Sent: 95549 KB/s BufferSize: 65535
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+#14 Received: 0 KB/s Sent: 100366 KB/s BufferSize: 65535
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+#15 Received: 0 KB/s Sent: 101336 KB/s BufferSize: 65535
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+Stats# Received Total: 0 MB Sent Total: 1484 MB RTT: 8 ms
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+```
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+
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+### Constant Throughput Set 8000 byte, for 300 seconds, send buffer 10000 byte
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+
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+> `./client-benchmark -p -d 300 -r 8000 -b 10000`
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+
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+Example Output (Offering Peer's Output);
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+```bash
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+Stun server is stun:stun.l.google.com:19302
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+The local ID is: 1w9O
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+Url is ws://localhost:8000/1w9O
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+Waiting for signaling to be connected...
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+2021-03-25 14:29:38.697 INFO [21844] [rtc::impl::TcpTransport::connect@159] Connected to localhost:8000
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+2021-03-25 14:29:38.697 INFO [21844] [rtc::impl::TcpTransport::runLoop@327] TCP connected
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+2021-03-25 14:29:38.698 INFO [21844] [rtc::impl::WsTransport::incoming@118] WebSocket open
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+WebSocket connected, signaling ready
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+Enter a remote ID to send an offer:
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+zi4B
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+Offering to zi4B
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+Creating DataChannel with label "benchmark"
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+2021-03-25 14:29:48.729 INFO [21837] [rtc::impl::IceTransport::IceTransport@106] Using STUN server "stun.l.google.com:19302"
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+2021-03-25 14:29:48.729 INFO [21837] [rtc::impl::PeerConnection::changeSignalingState@992] Changed signaling state to new
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+2021-03-25 14:29:48.729 INFO [21837] [rtc::impl::PeerConnection::changeGatheringState@981] Changed gathering state to in-progress
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+Gathering State: in-progress
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+2021-03-25 14:29:48.729 INFO [21837] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:787: Changing state to gathering
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+2021-03-25 14:29:48.730 WARN [21837] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:239: Local description already has the maximum number of host candidates
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+Benchmark will run for 300 seconds
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+2021-03-25 14:29:48.730 INFO [21866] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:787: Changing state to connecting
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+2021-03-25 14:29:48.731 INFO [21866] [rtc::impl::PeerConnection::changeState@964] Changed state to connecting
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+State: connecting
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+2021-03-25 14:29:48.732 INFO [21866] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:610: Using STUN server stun.l.google.com:19302
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+2021-03-25 14:29:48.732 INFO [21844] [rtc::impl::PeerConnection::changeSignalingState@992] Changed signaling state to connecting
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+2021-03-25 14:29:48.782 WARN [21866] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:426: Send failed, errno=101
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+2021-03-25 14:29:48.782 WARN [21866] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:1483: STUN message send failed, errno=101
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+2021-03-25 14:29:48.782 INFO [21866] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:843: STUN binding failed
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+2021-03-25 14:29:48.787 INFO [21866] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:1302: STUN server binding successful
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+2021-03-25 14:29:48.787 INFO [21866] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:2148: Candidate gathering done
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+2021-03-25 14:29:48.787 INFO [21866] [rtc::impl::PeerConnection::changeGatheringState@981] Changed gathering state to complete
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+Gathering State: complete
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+2021-03-25 14:29:48.832 INFO [21866] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:787: Changing state to connected
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+2021-03-25 14:29:48.882 INFO [21866] [rtc::impl::IceTransport::LogCallback@339] juice: agent.c:787: Changing state to completed
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+2021-03-25 14:29:49.735 INFO [21869] [rtc::impl::DtlsTransport::runRecvLoop@503] DTLS handshake finished
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+2021-03-25 14:29:49.742 INFO [21841] [rtc::impl::SctpTransport::processNotification@708] SCTP connected
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+2021-03-25 14:29:49.742 INFO [21841] [rtc::impl::PeerConnection::changeState@964] Changed state to connected
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+State: connected
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+DataChannel from zi4B open
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+#1 Received: 0 KB/s Sent: 78 KB/s BufferSize: 0
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+#2 Received: 8002 KB/s Sent: 7999 KB/s BufferSize: 0
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+#3 Received: 8002 KB/s Sent: 7998 KB/s BufferSize: 0
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+#4 Received: 7995 KB/s Sent: 8000 KB/s BufferSize: 0
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+#5 Received: 8000 KB/s Sent: 8001 KB/s BufferSize: 0
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+Stats# Received Total: 33 MB Sent Total: 33 MB RTT: 0 ms
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+
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+#6 Received: 8001 KB/s Sent: 7999 KB/s BufferSize: 0
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+#7 Received: 7997 KB/s Sent: 7998 KB/s BufferSize: 0
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+#8 Received: 8001 KB/s Sent: 7999 KB/s BufferSize: 0
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+#9 Received: 7998 KB/s Sent: 8001 KB/s BufferSize: 0
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+#10 Received: 8003 KB/s Sent: 7998 KB/s BufferSize: 0
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+Stats# Received Total: 74 MB Sent Total: 74 MB RTT: 0 ms
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+
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+#11 Received: 7990 KB/s Sent: 7998 KB/s BufferSize: 0
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+#12 Received: 7999 KB/s Sent: 8000 KB/s BufferSize: 0
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+#13 Received: 8001 KB/s Sent: 8002 KB/s BufferSize: 0
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+#14 Received: 7998 KB/s Sent: 7999 KB/s BufferSize: 0
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+#15 Received: 8000 KB/s Sent: 7998 KB/s BufferSize: 0
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+Stats# Received Total: 115 MB Sent Total: 115 MB RTT: 0 ms
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+```
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Paul-Louis Ageneau