Ubuntu – Why doesn’t htop display the same processes as top

As suggested by Cedric Julien in the comments,

To view all the processes that are using CPU, when using System Monitor, go to the View menu and select All Processes

This link may help Set maximum CPU consumption in percentage by any process searched by : MrSeed

this script may help too , any any one wants to enter suggestions on this script to enhance it , it will be my pleasure

       #!/bin/bash -xv

read -p "Which program u want to limit its processes?" ProgrameName
read -p "Which limitation percentage u want for it ?" limitationPercentage  
read -p "Period to be sleep " sleepInterval 
dataFile="/home/ahmedubuntu/Desktop/.file.txt"
separator="######"
trap "echo \"\" > $dataFile"  SIGINT SIGTERM SIGHUP
########################################################
if [ -e $dataFile ]; then
  echo "File $dataFile already exists!"
  echo -e "" > $dataFile
else
  echo >> $dataFile
fi 
echo -e "$ProgrameName \n $limitationPercentage \n" >> $dataFile
getAllPIDRunUnderThisProgram=$( ps -e | grep "$ProgrameName" | awk '{print $1;}')
echo -e "${getAllPIDRunUnderThisProgram[@]}  \n $separator \n" >> $dataFile
for i in $getAllPIDRunUnderThisProgram
   do
    gnomeTab+=( --tab -e "cpulimit -p $i -l $limitationPercentage ")  
   done
gnome-terminal "${gnomeTab[@]}"
#echo gnome-terminal "${gnomeTab[@]}"
########################################################
while sleep $sleepInterval
do
i=0
while read line
do
if [ -n "$line" ] && ["$line" != "separator"] 
then
programeNameAndPID[i]=$line
((i++))
elif [["$line" == "separator"]] ; then
getAllPIDRunUnderThisProgram=$( ps -e | grep "$programeNameAndPID[0]" | awk '{print $1;}')
if [${#getAllPIDRunUnderThisProgram[*]} -gt ${#programeNameAndPID[*]}-2  ]
then
unset gnomeTab
newProcessNumber=${#getAllPIDRunUnderThisProgram[*]}-${#programeNameAndPID[*]}-2
index=${#getAllPIDRunUnderThisProgram[*]}-1
for (( c=$newProcessNumber ; c > 0 ; c-- ))
do
gnomeTab+=( --tab -e "cpulimit -p $getAllPIDRunUnderThisProgram[$index] -l $programeNameAndPID[1] ") 
((index--)) 
done
gnome-terminal "${gnomeTab[@]}"
fi
i=0
unset programeNameAndPID
fi
done < $dataFile
done

and by adding nice -10 will work well with no need to sudo and password