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Commit 7e643d36 authored by Bob Lantz's avatar Bob Lantz
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Removed udpbwgraph - not ready for prime time.

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examples/udpbwgraph.py deleted 100755 → 0
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#!/usr/bin/python
"""
udpbwgraph: Plot network bandwidth over time
Bob Lantz
3/27/10
"""
import re
from Tkinter import Frame, Label, Button, Scrollbar, OptionMenu, Canvas
from Tkinter import StringVar
from mininet.log import setLogLevel
from mininet.net import Mininet
from mininet.node import KernelSwitch, UserSwitch, OVSKernelSwitch
from mininet.node import Controller, NOX
from mininet.topolib import TreeTopo
from mininet.util import quietRun
# bwtest support
class Graph( Frame ):
"Graph that we can add bars to over time."
def __init__( self, master=None,
bg = 'white',
gheight=200, gwidth=500,
barwidth=10,
ymax=3.5,):
Frame.__init__( self, master )
self.bg = bg
self.gheight = gheight
self.gwidth = gwidth
self.barwidth = barwidth
self.ymax = float( ymax )
self.xpos = 0
# Create everything
self.title, self.graph, self.scale = self.createWidgets()
self.updateScrollRegions()
self.yview( 'moveto', '1.0' )
def createScale( self ):
"Create a and return a new canvas with scale markers."
height = float( self.gheight )
width = 25
ymax = self.ymax
scale = Canvas( self, width=width, height=height, background=self.bg )
fill = 'red'
# Draw scale line
scale.create_line( width - 1, height, width - 1, 0, fill=fill )
# Draw ticks and numbers
for y in range( 0, int( ymax + 1 ) ):
ypos = height * ( 1 - float( y ) / ymax )
scale.create_line( width, ypos, width - 10, ypos, fill=fill )
scale.create_text( 10, ypos, text=str( y ), fill=fill )
return scale
def updateScrollRegions( self ):
"Update graph and scale scroll regions."
ofs = 20
height = self.gheight + ofs
self.graph.configure( scrollregion=( 0, -ofs,
self.xpos * self.barwidth, height ) )
self.scale.configure( scrollregion=( 0, -ofs, 0, height ) )
def yview( self, *args ):
"Scroll both scale and graph."
self.graph.yview( *args )
self.scale.yview( *args )
def createWidgets( self ):
"Create initial widget set."
# Objects
title = Label( self, text="Bandwidth (Mb/s)", bg=self.bg )
width = self.gwidth
height = self.gheight
scale = self.createScale()
graph = Canvas( self, width=width, height=height, background=self.bg)
xbar = Scrollbar( self, orient='horizontal', command=graph.xview )
ybar = Scrollbar( self, orient='vertical', command=self.yview )
graph.configure( xscrollcommand=xbar.set, yscrollcommand=ybar.set,
scrollregion=(0, 0, width, height ) )
scale.configure( yscrollcommand=ybar.set )
# Layout
title.grid( row=0, columnspan=3, sticky='new')
scale.grid( row=1, column=0, sticky='nsew' )
graph.grid( row=1, column=1, sticky='nsew' )
ybar.grid( row=1, column=2, sticky='ns' )
xbar.grid( row=2, column=0, columnspan=2, sticky='ew' )
self.rowconfigure( 1, weight=1 )
self.columnconfigure( 1, weight=1 )
return title, graph, scale
def addBar( self, yval ):
"Add a new bar to our graph."
percent = yval / self.ymax
c = self.graph
x0 = self.xpos * self.barwidth
x1 = x0 + self.barwidth
y0 = self.gheight
y1 = ( 1 - percent ) * self.gheight
c.create_rectangle( x0 , y0, x1, y1, fill='green' )
self.xpos += 1
self.updateScrollRegions()
self.graph.xview( 'moveto', '1.0' )
def test( self ):
"Add a bar for testing purposes."
ms = 1000
if self.xpos < 10:
self.addBar( self.xpos / 10 * self.ymax )
self.after( ms, self.test )
def setTitle( self, text ):
"Set graph title"
self.title.configure( text=text, font='Helvetica 9 bold' )
class Controls( Frame ):
"Handy controls for configuring test."
switches = {
'Kernel Switch': KernelSwitch,
'User Switch': UserSwitch,
'Open vSwitch': OVSKernelSwitch
}
controllers = {
'Reference Controller': Controller,
'NOX': NOX
}
def __init__( self, master, startFn, stopFn, quitFn ):
Frame.__init__( self, master )
# Option menus
opts = { 'font': 'Geneva 7 bold' }
self.switch = self.optionMenu( self.switches,
KernelSwitch, opts )
self.controller = self.optionMenu( self.controllers,
Controller, opts)
# Spacer
pk = { 'fill': 'x' }
Label( self, **opts ).pack( **pk )
# Buttons
self.start = Button( self, text='Start', command=startFn, **opts )
self.stop = Button( self, text='Stop', command=stopFn, **opts )
self.quit = Button( self, text='Quit', command=quitFn, **opts )
for button in ( self.start, self.stop, self.quit ):
button.pack( **pk )
def optionMenu( self, menuItems, initval, opts ):
"Add a new option menu. Returns function to get value."
var = StringVar()
var.set( findKey( menuItems, initval ) )
menu = OptionMenu( self, var, *menuItems )
menu.config( **opts )
menu.pack( fill='x' )
return lambda: menuItems[ var.get() ]
def parsebwtest( line,
r=re.compile( r'(\d+) s: in ([\d\.]+) MB/s, out ([\d\.]+) MB/s' ) ):
"Parse udpbwtest.c output, returning seconds, inbw, outbw."
match = r.match( line )
if match:
seconds, inbw, outbw = match.group( 1, 2, 3 )
return int( seconds ), float( inbw ), float( outbw )
return None, None, None
class UdpBwTest( Frame ):
"Test and plot UDP bandwidth over time"
def __init__( self, topo, master=None ):
"Start up and monitor udpbwtest on each of our hosts."
Frame.__init__( self, master )
self.controls = Controls( self, self.start, self.stop, self.quit )
self.graph = Graph( self )
# Layout
self.controls.pack( side='left', expand=False, fill='y' )
self.graph.pack( side='right', expand=True, fill='both' )
self.pack( expand=True, fill='both' )
self.topo = topo
self.net = None
self.hosts = []
self.hostCount = 0
self.output = None
self.results = {}
self.running = False
def start( self ):
"Start test."
if self.running:
return
switch = self.controls.switch()
controller = self.controls.controller()
self.net = Mininet( self.topo, switch=switch,
controller=controller )
self.hosts = self.net.hosts
self.hostCount = len( self.hosts )
print "*** Starting network"
self.net.start()
print "*** Starting udpbwtest on hosts"
hosts = self.hosts
for host in hosts:
ips = [ h.IP() for h in hosts if h != host ]
host.cmdPrint( './udpbwtest ' + ' '.join( ips ) + ' &' )
print "*** Monitoring hosts"
self.output = self.net.monitor( hosts, timeoutms=1 )
self.results = {}
self.running = True
self.updateGraph()
# Pylint isn't smart enough to understand iterator.next()
# pylint: disable-msg=E1101
def updateGraph( self ):
"Graph input bandwidth."
print "updateGraph"
if not self.running:
return
while True:
host, line = self.output.next()
if host is None or len( line ) == 0:
break
seconds, inbw, outbw = parsebwtest( line )
if seconds is None:
break
result = self.results.get( seconds, [] ) + [
( host, inbw, outbw ) ]
self.results[ seconds ] = result
if len( result ) == self.hostCount:
# Calculate total and update graph
# We report input bandwidth, i.e. packets that made it
totalin = 0
for host, inbw, outbw in result:
totalin += inbw
self.graph.addBar( totalin * 8.0 / 1000.0 )
print totalin
# Fileevent might be better, but for now we just poll every 500ms
self.graph.after( 500, self.updateGraph )
def stop( self ):
"Stop test."
print "*** Stopping udpbwtest processes"
# We *really* don't want these things hanging around!
quietRun( 'killall -9 udpbwtest' )
if not self.running:
return
print "*** Stopping network"
self.running = False
self.net.stop()
def quit( self ):
"Quit app."
self.stop()
Frame.quit( self )
# pylint: enable-msg=E1101
# Useful utilities
def findKey( d, value ):
"Find some key where d[ key ] == value."
return [ key for key, val in d.items() if val == value ][ 0 ]
def assign( obj, **kwargs):
"Set a bunch of fields in an object."
for name, value in kwargs.items():
setattr( obj, name, value )
class Object( object ):
"Generic object you can stuff junk into."
def __init__( self, **kwargs ):
assign( self, **kwargs )
if __name__ == '__main__':
setLogLevel( 'info' )
app = UdpBwTest( topo=TreeTopo( depth=2, fanout=2 ) )
app.mainloop()
examples/udpbwtest.c deleted 100644 → 0
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/* udpbwtest: a simple bandwidth test
*
* To test all-to-all communication, we simply open up a
* UDP socket and repeat the following:
*
* 1. Send a packet to a random host if possible
* 2. Receive a packet if possible
* 3. Periodically report our I/O bandwidth
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <strings.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <assert.h>
#include <sys/time.h>
#include <poll.h>
#include <signal.h>
enum { Port=12345 };
/* Handy utility functions */
int bindAddr( int fd, long addr, u_short port ) {
/* Easy interface to bind */
struct sockaddr_in sa;
bzero( &sa, sizeof( sa ) );
sa.sin_family = AF_INET;
sa.sin_addr.s_addr = htonl( addr );
sa.sin_port = htons( port );
return bind( fd, ( struct sockaddr * )&sa, sizeof( sa ) );
}
int udpSocket( u_short port ) {
/* Easy interface to making a UDP socket */
int fd = socket( AF_INET, SOCK_DGRAM, 0 );
if ( fd < 0 ) { return fd; }
int err = bindAddr( fd, INADDR_ANY, port );
if ( err < 0 ) { return err; }
return fd;
}
ssize_t sendBytes( int sock, char *outbuf, size_t bufsize,
struct in_addr *addr, u_short port ) {
/* Simpler sendto */
struct sockaddr_in sa;
int err;
bzero( &sa, sizeof( sa ) );
sa.sin_family = AF_INET;
sa.sin_addr = *addr;
sa.sin_port = htons( port );
err = sendto( sock, outbuf, bufsize, 0, (const struct sockaddr *) &sa,
sizeof( sa ) );
if ( err < 0 ) { perror( "sendto:" ); }
return err;
}
ssize_t recvBytes( int sock, char *inbuf, size_t bufsize,
struct in_addr *addr) {
/* Simpler recvfrom */
struct sockaddr_in sa;
socklen_t saLen = sizeof( sa );
ssize_t len;
len = recvfrom( sock, inbuf, bufsize, 0, (struct sockaddr *) &sa, &saLen );
if ( len >= 0 ) {
assert( saLen == sizeof( sa ) );
*addr = sa.sin_addr;
}
else { perror( "recvfrom:" ); }
return len;
}
int readable( int fd ) {
/* Poll a single file descriptor for reading */
struct pollfd fds = { fd, POLLIN, POLLIN };
int result = poll( &fds, 1, 0 );
/* True if there is one readable descriptor */
return ( result == 1 );
}
int writable( int fd ) {
/* Poll a single file descriptor for writing */
struct pollfd fds = { fd, POLLOUT, POLLOUT };
int result = poll( &fds, 1, 0 );
/* True if there is one writable descriptor */
return ( result == 1 );
}
int poll1( int fd, int flags, int ms ) {
/* Call poll on a single descriptor */
struct pollfd fds[] = { { fd, flags, 0 } };
return poll( fds, 1, ms );
}
int waitReadable( int fd, int ms ) { return poll1( fd, POLLIN, ms ); }
int waitWritable( int fd, int ms ) { return poll1( fd, POLLIN, ms ); }
int waitReadableOrWritable( int fd, int ms ) {
return poll1( fd, POLLIN | POLLOUT, ms );
}
/* Timer support */
int alarm = 0;
void handleAlarm( int sig) { alarm = 1; }
void startTimer( int seconds) {
struct itimerval v;
v.it_interval.tv_sec = seconds;
v.it_interval.tv_usec = 0;
v.it_value = v.it_interval;
signal( SIGALRM, handleAlarm );
setitimer( ITIMER_REAL, &v, 0 );
}
void startOneSecondTimer() { startTimer( 1 ); }
void stopTimer() {
struct itimerval v;
bzero( &v, sizeof v );
setitimer( ITIMER_REAL, &v, 0 );
}
/* Actual program */
void bwtest( int sock, struct in_addr *hosts, int hostCount ) {
/* Test our bandwidth, by receiving whatever we get, and sending
* randomly to a set of hosts */
char outbuf[ 1024 ];
char inbuf[ 1024 ];
time_t seconds = time( 0 );
uint64_t b, bytes;
uint64_t inbytes = 0, outbytes = 0;
int i;
for ( i = 0; i < sizeof( outbuf ); i++ ) { outbuf[ i ] = i % 255; }
while ( 1 ) {
size_t addr_len;
struct in_addr addr = hosts[ random() % hostCount ];
/* Wait until we have something to do. */
waitReadableOrWritable( sock, 0 );
/* Receive some bytes */
for ( b = 0; b < 10 && readable( sock ); b += 1 ) {
bytes = recvBytes( sock, inbuf, sizeof( inbuf ), &addr );
inbytes += bytes;
}
/* Send some bytes */
for ( b = 0; b < 10 && writable(sock); b += 1 ) {
bytes = sendBytes( sock, outbuf, sizeof( outbuf ),
&addr, Port );
outbytes += bytes;
}
/* Periodically report bandwidth */
if ( alarm ) {
alarm = 0;
seconds++;
printf("%d s: in %.2f Mbps, out %.2f Mbps\n",
seconds, 8.0*inbytes/1e6, 8.0*outbytes/1e6 ); fflush( stdout );
inbytes = outbytes = 0;
}
}
}
int main( int argc, char *argv[] ) {
struct in_addr start, *hosts, addr;
int count, sock, i;
if ( argc < 2 ) {
fprintf( stderr, "usage: %s host...\n", argv[ 0 ] );
exit( 1 );
}
count = argc - 1;
hosts = (struct in_addr *) malloc( count * sizeof( struct in_addr ) );
if ( hosts == NULL ) { perror( "malloc:" ); exit( 1 ); }
for ( i = 0; i < count; i++ )
inet_aton( argv[ i + 1 ], &hosts[ i ] );
sock = udpSocket( Port );
if ( sock < 0 ) { perror( "udpSocket:" ); exit( 1 ); }
startOneSecondTimer();
bwtest( sock, hosts, count ); /* Never returns for now... */
stopTimer();
}
examples/udpbwtest.py deleted 100755 → 0
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#!/usr/bin/python
"""
Create a tree network and run udpbwtest.c on it, attempting to
saturate global bandwidth by sending constant all-to-all
udp traffic. This should be something of a stress test.
We should also make a tcp version. :D
In addition to trying to saturate global bandwidth in
various Mininet configurations, this example:
- uses a topology, TreeTopo, from mininet.topolib
- starts up a custom test program, udpbwtest, on each host
- dynamically monitors the output of a set of hosts
"""
import os
import re
import sys
from time import time
flush = sys.stdout.flush
from mininet.log import lg
from mininet.net import Mininet
from mininet.node import KernelSwitch
from mininet.topolib import TreeTopo
from mininet.util import quietRun
# bwtest support
def parsebwtest( line,
r=re.compile( r'(\d+) s: in ([\d\.]+) MB/s, out ([\d\.]+) MB/s' ) ):
"Parse udpbwtest.c output, returning seconds, inbw, outbw."
match = r.match( line )
if match:
seconds, inbw, outbw = match.group( 1, 2, 3 )
return int( seconds ), float( inbw ), float( outbw )
return None, None, None
def printTotalHeader():
"Print header for bandwidth stats."
print
print "time(s)\thosts\ttotal in/out (MB/s)\tavg in/out (MB/s)"
# Annoyingly, pylint isn't smart enough to notice
# when an unused variable is an iteration tuple
# pylint: disable-msg=W0612
def printTotal( seconds=None, result=None ):
"Compute and print total bandwidth for given results set."
intotal = outtotal = 0.0
count = len( result )
for host, inbw, outbw in result:
intotal += inbw
outtotal += outbw
inavg = intotal / count if count > 0 else 0
outavg = outtotal / count if count > 0 else 0
print '%d\t%d\t%.2f/%.2f\t\t%.2f/%.2f' % ( seconds, count,
intotal, outtotal, inavg, outavg )
# pylint: enable-msg=W0612
# Pylint also isn't smart enough to understand iterator.next()
# pylint: disable-msg=E1101
def udpbwtest( net, seconds ):
"Start up and monitor udpbwtest on each of our hosts."
hosts = net.hosts
hostCount = len( hosts )
print "*** Starting udpbwtest on hosts"
for host in hosts:
ips = [ h.IP() for h in hosts if h != host ]
print host.name,
flush()
host.cmd( './udpbwtest ' + ' '.join( ips ) + ' &' )
print
results = {}
print "*** Monitoring hosts"
output = net.monitor( hosts )
quitTime = time() + seconds
while time() < quitTime:
host, line = output.next()
if host is None:
break
seconds, inbw, outbw = parsebwtest( line )
if seconds is not None:
result = results.get( seconds, [] ) + [ ( host, inbw, outbw ) ]
if len( result ) == hostCount:
printTotal( seconds, result )
results[ seconds ] = result
print "*** Stopping udpbwtest processes"
# We *really* don't want these things hanging around!
quietRun( 'killall -9 udpbwtest' )
print
print "*** Results:"
printTotalHeader()
times = sorted( results.keys() )
for t in times:
printTotal( t - times[ 0 ] , results[ t ] )
print
# pylint: enable-msg=E1101
if __name__ == '__main__':
lg.setLogLevel( 'info' )
if not os.path.exists( './udpbwtest' ):
raise Exception( 'Could not find udpbwtest in current directory.' )
network = Mininet( TreeTopo( depth=1, fanout=8 ), switch=KernelSwitch )
network.start()
udpbwtest( network, seconds=10 )
network.stop()
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