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      1 #!/bin/sh
      2 #
      3 # stream_range
      4 #
      5 # generate a whole lot of numbers from netperf to see the effects
      6 # of send size on thruput
      7 #
      8 
      9 #
     10 # usage : tcp_stream_range hostname [CPU]
     11 #
     12 
     13 if [ $# -gt 2 ]; then
     14 	echo "try again, correctly -> tcp_stream_range hostname [CPU]"
     15 	exit 1
     16 fi
     17 
     18 if [ $# -eq 0 ]; then
     19   echo "try again, correctly -> tcp_stream_range hostname [CPU]"
     20   exit 1
     21 fi
     22 
     23 # if there are two parms, parm one it the hostname and parm two will
     24 # be a CPU indicator. actually, anything as a second parm will cause
     25 # the CPU to be measured, but we will "advertise" it should be "CPU"
     26 
     27 if [ $# -eq 2 ]; then
     28   REM_HOST=$1
     29   LOC_CPU="-c"
     30   REM_CPU="-C"
     31 fi
     32 
     33 if [ $# -eq 1 ]; then
     34   REM_HOST=$1
     35 fi
     36 
     37 # at what port will netserver be waiting? If you decide to run
     38 # netserver at a differnet port than the default of 12865, then set
     39 # the value of PORT apropriately
     40 #PORT="-p some_other_portnum"
     41 PORT=""
     42 
     43 # where is netperf, and are there any "constant" options such as 
     44 # the netserver port number
     45 #NETHOME=/usr/etc/net_perf
     46 NETHOME="."
     47 NETPERF=$NETHOME/netperf $PORT
     48 
     49 # How accurate we want the estimate of performance: 
     50 #      maximum and minimum test iterations (-i)
     51 #      confidence level (99 or 95) and interval (percent)
     52 STATS_STUFF="-i 10,2 -I 99,3"
     53 
     54 #
     55 # some stuff for the arithmetic 
     56 #
     57 # we start at start, and then multiply by MULT and add ADD. by changing
     58 # these numbers, we can double each time, or increase by a fixed
     59 # amount, or go up by 4x, whatever we like...
     60 #
     61 START=1
     62 
     63 END=65536
     64 
     65 MULT=4
     66 
     67 ADD=0
     68 
     69 # If we are measuring CPU utilization, then we can save beaucoup
     70 # time by saving the results of the CPU calibration and passing
     71 # them in during the real tests. So, we execute the new CPU "tests"
     72 # of netperf and put the values into shell vars.
     73 case $LOC_CPU in
     74 \-c) LOC_RATE=`$NETPERF -t LOC_CPU`;;
     75 *) LOC_RATE=""
     76 esac
     77 
     78 case $REM_CPU in
     79 \-C) REM_RATE=`$NETPERF -t REM_CPU -H $REM_HOST`;;
     80 *) REM_RATE=""
     81 esac
     82 
     83 TIME="60"
     84 
     85 #
     86 # the maximum socket buffer size is system dependent. for the
     87 # "cannonical" tests we use 32KB, but this can be altered
     88 #
     89 SOCKET_SIZE="-s 32768 -S 32768"
     90 
     91 MESSAGE=$START
     92 while [ $MESSAGE -le $END ]; do
     93   echo
     94   echo ------------------------------------
     95   echo Testing with the following command line:
     96   echo  $NETPERF -l $TIME -H $REM_HOST -t TCP_STREAM\
     97         $LOC_CPU $LOC_RATE $REM_CPU $REM_RATE $STATS_STUFF --\
     98         -m $MESSAGE $SOCKET_SIZE 
     99   echo
    100   $NETPERF -l $TIME -H $REM_HOST -t TCP_STREAM\
    101   $LOC_CPU $LOC_RATE $REM_CPU $REM_RATE $STATS_STUFF --\
    102   -m $MESSAGE $SOCKET_SIZE
    103 
    104   MESSAGE=`expr $MESSAGE + $ADD`
    105   MESSAGE=`expr $MESSAGE \* $MULT`
    106 
    107 done
    108 echo
    109 
    110