Parses the stderr from RidgeRun's Gst-Shark interlatency profiler

gst-interlatency-parser.bash

#! /usr/bin/bash

# This bash scripts takes the stderr from RidgeRun's Gst-Shark interlatency
# tracer and parses its output to build some tables averaging results.
#
# Install gst shark and wrap your pipeline as:
#   $ GST_DEBUG="GST_TRACER:7" GST_TRACERS="interlatency"  \
#       gst-launch-1.0 videotestsrc ! videoconvert ! autovideosink \
#       2> tracer.log
#
# Leave it running for an amount of time then run this script (log name hardcoded here)
# Sample output:
#  v4l2src0_src    v4l2src1_src    v4l2src2_src    v4l2src3_src    v4l2src    
#  0.071 ~ 0.055   0.068 ~ 0.056   0.069 ~ 0.091   0.072 ~ 0.054   0.070 ~ 0.066      :: m_src
#  0.088 ~ 0.038   0.089 ~ 0.049   0.093 ~ 0.093   0.091 ~ 0.035   0.090 ~ 0.058      :: nvinfer0_src
#  0.093 ~ 0.039   0.093 ~ 0.050   0.096 ~ 0.094   0.095 ~ 0.037   0.094 ~ 0.059      :: nvtracker0_src
#  0.109 ~ 0.041   0.109 ~ 0.050   0.111 ~ 0.093   0.112 ~ 0.040   0.110 ~ 0.060      :: nvmultistreamtiler0_src
#  0.111 ~ 0.040   0.110 ~ 0.050   0.113 ~ 0.093   0.113 ~ 0.040   0.112 ~ 0.060      :: nvdsosd0_src
#  0.128 ~ 0.045   0.127 ~ 0.053   0.129 ~ 0.095   0.130 ~ 0.045   0.129 ~ 0.063      :: valve-bboxes
#  0.111 ~ 0.040   0.111 ~ 0.050   0.113 ~ 0.093   0.113 ~ 0.040   0.112 ~ 0.060      :: valve-stream
#  0.112 ~ 0.040   0.111 ~ 0.050   0.113 ~ 0.093   0.114 ~ 0.039   0.113 ~ 0.060      :: valve-display
#  0.128 ~ 0.045   0.128 ~ 0.053   0.130 ~ 0.095   0.131 ~ 0.045   0.129 ~ 0.063      :: nvmsgbroker0_sink
#  0.112 ~ 0.040   0.111 ~ 0.050   0.113 ~ 0.093   0.114 ~ 0.039   0.113 ~ 0.060      :: fakesink0_sink



# Define sources as stated in logs
# Mind this will be grepped
sources=(
    v4l2src0_src \
    v4l2src1_src \
    v4l2src2_src \
    v4l2src3_src \
    v4l2src      \
    )

# Define checkpoints as stated in logs
checkpoints=(
    m_src                   \
    nvinfer0_src            \
    nvtracker0_src          \
    nvmultistreamtiler0_src \
    nvdsosd0_src            \
    valve-bboxes            \
    valve-stream            \
    valve-display           \
    nvmsgbroker0_sink       \
    fakesink0_sink          \
    )


# Print headers for result output
for SRC_HEADER in "${sources[@]}"
do printf "$SRC_HEADER    "
done
echo

# Loop and fetch results
for CKP in "${checkpoints[@]}"
do
    for SRC in "${sources[@]}"
    do
        # Mean and stddev for this combination
        var=`grep $SRC tracer.log | grep $CKP | grep -o -P '(?<=time=\(string\)0:00:).*(?=;$)'  | awk '{s+=$0; ss+=$0^2} END{printf "%.3f ~ %.3f", m=s/NR, sqrt(ss/NR-m^2)}'`
        printf "$var   "
    done
    printf "   :: $CKP"
    echo
done