plot.tcl

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#
# routines to perform post processing, mostly for plotting
#

Class PostProcess

PostProcess instproc init { l lf lg gf gg redqf} {
        $self instvar linkflowfile_ linkgraphfile_
        $self instvar flowfile_ graphfile_
        $self instvar redqfile_
	$self instvar label_ post_

	set label_ $l
        set linkflowfile_ $lf
        set linkgraphfile_ $lg
       set flowfile_ $gf
        set graphfile_ $gg
	set redqfile_ $redqf

	set format_ "xgraph"	; # default
}


#
# Plot the queue size and average queue size, for RED gateways.
#
PostProcess instproc plot_queue {} {

	$self instvar redqfile_
	$self instvar label_ format_

	#TestSuite instproc plotQueue file
	
	set awkCode {
		{
			if ($1 == "Q" && NF>2) {
				print $2, $3 >> "temp.q";
				set end $2
			}
			else if ($1 == "a" && NF>2)
				print $2, $3 >> "temp.a";
		}
	}

	set graphFile $redqfile_.xgr
	
	set f [open $graphFile w]
	puts $f "TitleText: $label_"
	puts $f "Device: Postscript"

	exec rm -f temp.q temp.a 
	exec touch temp.a temp.q
	
	exec awk $awkCode $redqfile_
	
	puts $f \"queue
	exec cat temp.q >@ $f  
	puts $f \n\"ave_queue
	exec cat temp.a >@ $f
	
	###puts $f \n"thresh
	###puts $f 0 [[ns link $r1 $r2] get thresh]
	###puts $f $end [[ns link $r1 $r2] get thresh]
	
	close $f
	puts "running xgraph for queue dynamics ...."
	if { $format_ == "xgraph" } {
		exec xgraph -bb -tk -x time -y queue $graphFile &
		return
	}
	puts stderr "graph format $format_ unknown"
}


#       x axis: # arrivals for this flow+category / # total arrivals [bytes]
#       y axis: # drops for this flow+category / # drops this category [pkts]

PostProcess instproc unforcedmakeawk arg {
    if { $arg == "unforced" } {
	set awkCode {
	    BEGIN { prev=-1; print "\"flow 0"; }
	    {
		if ($5 != prev) {
		    print " "; print "\"flow " $5;
		    if ($13 > 0 && $14 > 0) {
			print 100.0 * $9/$13, 100.0 * $10 / $14;
		    }
		    prev = $5;
		}
		else if ($13 > 0 && $14 > 0) {
		    print 100.0 * $9 / $13, 100.0 * $10 / $14;
		}
	    }
	}
    } elseif { $arg == "forced" } {
	set awkCode {
	    BEGIN { prev=-1; print "\"flow 0" }
	    {
		if ($5 != prev) {
		    print " "; print "\"flow " $5;
		    if ($13 > 0 && ($16-$14) > 0) {
			print 100.0 * $9/$13, 100.0 * ($18-$10) / ($16-$14);
		    }
		    prev = $5;
		}
		else if ($13 > 0 && ($16-$14) > 0) {
		    print 100.0 * $9 / $13, 100.0 * ($18-$10) / ($16-$14);
		}
	    }
	}
    } else {
	puts stderr "Error: unforcedmakeawk: arg $arg unknown."
	return {}
    }
    return $awkCode
}

#
# awk code used to produce:
#       x axis: # arrivals for this flow+category / # total arrivals [bytes]
#       y axis: # drops for this flow+category / # drops this category [pkts]
# Make sure that N > 2.3 / P^2, for N = # drops this category [pkts],
#       P = y axis value
PostProcess instproc unforcedmakeawk1 { } {
        return {
            BEGIN { print "\"flow 0" }
            {
                if ($5 != prev) {
                        print " "; 
			print "\"flow " $5;
			drops = 0; flow_drops = 0; arrivals = 0;
			flow_arrivals = 0;
			byte_arrivals = 0; flow_byte_arrivals = 0;
		}
		drops += $14;
		flow_drops += $10;
		arrivals += $12;
		byte_arrivals += $13;
		flow_arrivals += $8;
		flow_byte_arrivals += $9;
		p = flow_arrivals/arrivals;
		if (p*p*drops >= 2.3) {
		  print 100.0 * flow_byte_arrivals/byte_arrivals, 
		    100.0 * flow_drops / drops;
		  drops = 0; flow_drops = 0; arrivals = 0;
		  flow_arrivals = 0;
		  byte_arrivals = 0; flow_byte_arrivals = 0;
		} else {
		    printf "p: %8.2f drops: %d\n", p, drops
		}
		prev = $5
            }
        }
}

#printf "prev=%d,13=%d,17=%d,15=%d\n",prev,$13,$17,$15;
#
# awk code used to produce:
#       x axis: # arrivals for this flow+category / # total arrivals [bytes]
#       y axis: # drops for this flow+category / # drops this category [bytes]
PostProcess instproc forcedmakeawk arg {
    if { $arg == "forced" } {
	set awkCode {
	    BEGIN { prev=-1; print "\"flow 0"; }
	    {
		if ($5 != prev) {
		    print " "; print "\"flow " $5;
		    if ($13 > 0 && ($17-$15) > 0) {
			print 100.0 * $9/$13, 100.0 * ($19-$11) / ($17-$15);
			prev = $5;
		    }
		}
		else if ($13 > 0 && ($17-$15) > 0) {
		    print 100.0 * $9 / $13, 100.0 * ($19-$11) / ($17-$15);
		}
	    }
	}
    } elseif { $arg == "unforced" } {
	set awkCode {
	    BEGIN { prev=-1; print "\"flow 0"; }
	    {
		if ($5 != prev) {
		    print " "; print "\"flow " $5;
		    if ($13 > 0 && $15 > 0) {
			print 100.0 * $9/$13, 100.0 * $11 / $15;
			prev = $5;
		    }
		}
		else if ($13 > 0 && $15 > 0) {
		    print 100.0 * $9 / $13, 100.0 * $11 / $15;
		}
	    }
	}
    } else {
	puts stderr "Error: forcedmakeawk: arg $arg unknown."
	return {}
    }
    return $awkCode
}

#
# awk code used to produce:
#      x axis: # arrivals for this flow+category / # total arrivals [bytes]
#      y axis: # drops for this flow / # drops [pkts and bytes combined]
PostProcess instproc allmakeawk { } {
    set awkCode {
	BEGIN { prev=-1; frac_bytes=0; frac_packets=0; frac_arrivals=0; cat0=0; cat1=0}
	{
	    if ($5 != prev) {
		print " "; print "\"flow "$5;
		prev = $5
	    }
	    if ($1 != prevtime && cat1 + cat0 > 0) {
		if (frac_packets + frac_bytes > 0) {
		    cat1_part = frac_packets * cat1 / ( cat1 + cat0 ) 
		    cat0_part = frac_bytes * cat0 / ( cat1 + cat0 ) 
		    print 100.0 * frac_arrivals, 100.0 * ( cat1_part + cat0_part )
		}
		frac_bytes = 0; frac_packets = 0; frac_arrivals = 0;
		cat1 = 0; cat0 = 0;
		prevtime = $1
	    }
	    if ($14 > 0) {
		frac_packets = $10/$14;
	    }
	    else {
		frac_packets = 0;
	    }
	    if (($17-$15) > 0) {
		frac_bytes = ($19-$11)/($17-$15);
	    }
	    else {
		frac_bytes = 0;
	    }
	    if ($13 > 0) {
		frac_arrivals = $9/$13;
	    }
	    else {
		frac_arrivals = 0;
	    }
	    cat0 = $16-$14;
	    cat1 = $14;
	    prevtime = $1
	}
	END {
	    if (frac_packets + frac_bytes > 0) {
		cat1_part = frac_packets * cat1 / ( cat1 + cat0 ) 
		cat0_part = frac_bytes * cat0 / ( cat1 + cat0 ) 
		print 100.0 * frac_arrivals, 100.0 * ( cat1_part + cat0_part )
	    }
	}
    }
    return $awkCode
}

#--------------------------------------------------------------

PostProcess instproc create_flow_graph { graphtitle in out awkprocedure } {
        puts "removing graph file: $out"
        exec rm -f $out 
        set outdesc [open $out w] 

        #       
        # this next part is xgraph specific
        #       
        puts $outdesc "TitleText: $graphtitle"
        puts $outdesc "Device: Postscript"
        puts "writing flow data to $out ..."

	catch {exec sort -n +1 -o $in $in} result
	exec awk [$awkprocedure] $in >@ $outdesc
	close $outdesc
}

# plot drops vs. arrivals
PostProcess instproc finish_flow {} {
        $self instvar format_
        $self instvar label_ linkflowfile_ linkgraphfile_

	$self create_flow_graph $label_ $linkflowfile_ $linkgraphfile_ $awkprocedure
	puts "running xgraph for comparing drops and arrivals..."
	if { $format_ == "xgraph" } {
	    exec xgraph -bb -tk -nl -m -lx 0,100 -ly 0,100 -x "% of data bytes" -y "% of discards" $linkgraphfile_ &
	} 
	puts stderr "graph format $format_ unknown"
}

# plot drops vs. arrivals, for unforced drops.
PostProcess instproc plot_dropsinpackets { name flowgraphfile } {
        $self instvar format_
        $self instvar label_ linkflowfile_ linkgraphfile_

    $self create_flow_graph $label_ $linkflowfile_ $linkgraphfile_ \
	"$self unforcedmakeawk unforced"
    puts "running xgraph for comparing drops and arrivals..."
    if { $format_ == "xgraph" } {
	exec xgraph -bb -tk -nl -m -lx 0,100 -ly 0,100 -x "% of data bytes" -y "% of discards (in packets).  Queue in SETME" $linkgraphfile_ &
    } 
    puts stderr "graph format $format_ unknown"
}

# plot drops vs. arrivals, for unforced drops.
PostProcess instproc plot_dropsinpackets1 { name flowgraphfile } {
        $self instvar format_
        $self instvar label_ linkflowfile_ linkgraphfile_

    $self create_flow_graph $label_ $linkflowfile_ $linkgraphfile_ \
	"$self unforcedmakeawk1"
    puts "running xgraph for comparing drops and arrivals..."
    if { $format_ == "xgraph" } {
	exec xgraph -bb -tk -nl -m -lx 0,100 -ly 0,100 -x "% of data bytes" -y "% of discards (in packets).  Queue in SETME" $linkgraphfile_ &
    } 
    puts stderr "graph format $format_ unknown"
}

# plot drops vs. arrivals, for forced drops.
PostProcess instproc plot_dropsinbytes { name flowgraphfile } {
        $self instvar format_
        $self instvar label_ linkflowfile_ linkgraphfile_