DBS: Distributed Benchmark System

Performance Evaluation on HIPPI over ATM Part I

System Structure

Data sheet

  CPU             SGI ONYX, CHALLENGE
  OS              IRIX 5.3
  ATM Switch      NEC ATOMIS7
  HIPPI ATM Codec NEC ATOMIS2
  TCP Buffer Size 512000byte
  Message Size    8192byte
  Number of Send  10000
  Start Time      0.0s: ONYX(12) -> CHALLENGE(36)

Sequence Number(Application Level)
Each Throughput and Total Throughput (Application Level)

You can see TCP Deadlock occured from 0s to 0.2s caused by Slow-Start and Delayed ACK.

Data sheet

  CPU             SGI ONYX, CHALLENGE
  OS              IRIX 5.3
  ATM Switch      NEC ATOMIS7
  HIPPI ATM Codec NEC ATOMIS2
  TCP Buffer Size 512000byte
  Message Size    8192byte
  Number of Send  10000
  Start Time      0.0s: ONYX(12) -> CHALLENGE(36)
                  0.0s: ONYX(12) -> CHALLENGE(36)

Sequence Number(Application Level)
Each Throughput and Total Throughput (Application Level)

Throughputs are terrible wrong. You can see TCP data are transfered with stopping for 5s and intermittent. This is caused by wrong design of HIPPI/ATM code/decode controler that is considered transferring only one data stream at the same time.

Data sheet

  CPU             SGI ONYX, CHALLENGE
  OS              IRIX 5.3
  ATM Switch      NEC ATOMIS7
  HIPPI ATM Codec NEC ATOMIS2
  TCP Buffer Size 512000byte
  Message Size    8192byte
  Number of Send  10000
  Start Time      0.0s: ONYX(12) -> CHALLENGE(36)
                  1.0s: ONYX(12) -> CHALLENGE(36)

Sequence Number(Application Level)
Each Throughput and Total Throughput (Application Level)

Throughputs are terrible wrong. You can see TCP data are transfered with stopping for 5s. This is caused by wrong design of HIPPI/ATM code/decode controler that is considered transferring only one data stream at the same time.

Data sheet

  CPU             SGI ONYX, CHALLENGE
  OS              IRIX 5.3
  ATM Switch      NEC ATOMIS7
  HIPPI ATM Codec NEC ATOMIS2
  TCP Buffer Size 256000byte
  Message Size    8192byte
  Number of Send  10000
  Start Time      0.0s: ONYX(20) -> CHALLENGE(36)
                  1.0s: ONYX(12) -> CHALLENGE(36)

Sequence Number(Application Level)
Each Throughput and Total Throughput (Application Level)

Very Good!

Data sheet

  CPU             SGI ONYX, CHALLENGE
  OS              IRIX 5.3
  ATM Switch      NEC ATOMIS7
  HIPPI ATM Codec NEC ATOMIS2
  TCP Buffer Size 256000byte
  Message Size    8192byte
  Number of Send  10000
  Start Time      0.0s: ONYX(20) -> CHALLENGE(36)
                  1.0s: ONYX(12) -> CHALLENGE(36)
                  2.0s: ONYX(20) -> CHALLENGE(36)
                  3.0s: ONYX(12) -> CHALLENGE(36)

Sequence Number(Application Level)
Each Throughput and Total Throughput (Application Level)

Throughputs are terrible wrong. You can see TCP data are transfered with stopping for 5s and intermittent. This is caused by wrong design of HIPPI/ATM code/decode controler that is considered transferring only one data stream at the same time.