Developer Guide

  • 2022.1
  • 09/08/2022
  • Public
Contents

Analyze the Demo Results

The results shown here may not be identically reproduced because the inter-packet latency is very sensitive and may vary because of the duration of the test, and the health and state of the platform. The format of the graph may differ depending on the version of
matplotlib
on your system and the system specifications.
The transmitter measures workload execution time and dumps the data in the log file
tcc.stat
. To measure workload execution time, the transmitter uses the Measurement Library.
Demo tools measure transmission latency and dump the data in the log files,
log_e2e.log
and
log-roundtrip.log
. The receiver collects the first log for the
basic
profile, and the second log for the
single-input single-output (SISO)
profile.
The following graph for
log_e2e-noopt.log
and
log_e2e-opt.log
shows transmission latency example for the
basic
profile in the optimized and non-optimized modes. To measure transmission latency, receiver on Board B gets the time when a packet from transmitter is received and calculates the difference between the timestamp in the packet set by the transmitter on Board A and the current timestamp on the system.
The left panel of the following figure shows the histogram of a transmission latency, where the x-axis shows transmission count and the y-axis shows time in microseconds. The right panel shows the transmission latency of each packet.
The following graph for
log-roundtrip-noopt.log
and
log-roundtrip-opt.log
shows an example of the roundtrip transmission latency for the
SISO
profile in the optimized and non-optimized modes. In this case, the transmitter sends a packet to the receiver and receives the response packet from the receiver. The transmitter calculates the full roundtrip time based on the original timestamp measured on Board A before sending the packet, and the timestamp measured when the response packet was received.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.