fuji246

Copa Memos

[toc]

1. It is delay-based congestion control, no react to packet loss.
2. It is window based, not rate based congestion control.
3. It relies on ACK feedback.
4. It has mode switch to compete with buffer-filling flows like TCP.
5. It uses smallest RTT in recent srtt/2 duration to filter noise (ACK compression, WiFi aggregation)
6. Compared with Copa, NADA can achieve low delay and maintain at steady state as well, and it also has mode switch to compete with TCP, and it's more easiler to try NADA with current framework/protocols. However NADA may be sensative to noise in delay/loss, which need more investigation.

fuji246

from collections import OrderedDict, Counter
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
import matplotlib

june_data = {
    'joining_or_others': 44,
    'video_delay': 29,
    'meeting_dropped': 25,

fuji246

#!/usr/bin/osascript

on getProcessName(appPath)
       set AppleScript's text item delimiters to "/"
       set filename to text item -1 of appPath
       set AppleScript's text item delimiters to "."
       set processName to text item -2 of filename
       log "processName:" & processName
       return processName
end getProcessName

fuji246

#!/bin/bash

# ./dummynet.sh -b 500 -q 1000 -i 1 -t out -f 10.22.133.53 prepare
# ./dummynet.sh -b 500 -q 1000 -i 2 -t out -f 10.22.133.25 prepare
# ./dummynet.sh start
# ./dummynet.sh stop

#
# To avoid sudo with password, adding the following into /etc/sudoers
#

fuji246

#!/usr/bin/osascript

on openCamTwist()
        tell application "CamTwist"
                activate
                delay 1
        end tell
end openCamTwist

fuji246

1. loop file with pattern

lines=$(find "$logdir" -name '*.log' -print)

while read line
do
    echo "processing \"$line\""
done <<< "$(echo -e "$lines")"

fuji246

#!/usr/bin/osascript

on play_video(recording_path)
    tell application "QuickTime Player"
        if it is not running then
            log "play video: " & recording_path
            set filepath to (recording_path as POSIX file)
            set theMovie to open file filepath
            tell theMovie
                set the presenting to true

fuji246

#!/usr/bin/osascript

on todayISOformat()
        set dateFormat to "%T"
        set theDate to current date
        set y to text -4 thru -1 of ("0000" & (year of theDate))
        set mon to text -2 thru -1 of ("00" & ((month of theDate) as integer))
        set d to text -2 thru -1 of ("00" & (day of theDate))
        set H to text -2 thru -1 of ("00" & (hours of theDate))
        set M to text -2 thru -1 of ("00" & (minutes of theDate))

fuji246

#!/usr/bin/osascript 

# helper function for command parameters
on stringSplit(str, delimiters)
        # save delimiters to restore old settings
        set oldDelimiters to AppleScript's text item delimiters
        # set delimiters to delimiter to be used
        set AppleScript's text item delimiters to delimiters
        # create the array
        set splitedArray to every text item of str

fuji246

#!/bin/bash

> mtr.log

for (( ; ; ))
do
mtr $1 -u -r >> mtr.log
done