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#!/bin/bash -u

MPSTAT_LOG=mpstat_log1908
VMSTAT_LOG=vmstat_log1908
SYSINFO=sysinfo1908
PERFLOG=perf-fuse-ami.log

source gnuplotrc

function gen_cpu_data()
{
	time=0
	sum=0
	
	if [ -f times ]
	then
	        rm times
	fi
	
	for op in `cat ops`
	do
	        time=0;
	        for i in `grep -w ^$op $PERFLOG | awk '{print $2}'| cut -f1 -d'.'`
	        do
	                time=$((time+$i))
	        done;
	        time=$((time/3)) # Average over three runs
	        sum=$((sum + $time))
	        echo $sum >> times
	done
	sed -i 's/$/  200/g' times
	
	num_procs=`grep -w ^processor $SYSINFO | wc -l`
	echo `grep idle $MPSTAT_LOG | head -1 | awk '{print $NF}'` | grep -o idle
	col_tweak=$?
	for i in "all" 0 `seq $((num_procs-1))`
	do
	        egrep -v 'Linux|^$|idle' $MPSTAT_LOG | awk -v v1=$col_tweak '{print $3 " " $(NF-v1)}' | grep -w ^$i | cut -f 2 -d' '| sed 's/^/100-/g' | bc -l > cpu-$i;
	        cat -n cpu-$i > cpu-$i.new
	done
}

function plot_cpu_usage()
{
	xrange=$((`tail -1 times | awk '{print $1}'`+50))
	MPSTAT_INTERVAL=5
        plot_info=pinfo.$$
        num_procs=`grep -w ^processor $SYSINFO | wc -l`
        ltype=1
	
        for i in "all" 0 `seq $((num_procs-1))`
        do
                echo -ne "\"cpu-$i.new\" using (\$1*$MPSTAT_INTERVAL):2 title 'cpu-$i' with lines lt $ltype lw 2,\\c" >> $plot_info
                ltype=$((ltype+1))
        done
        echo "\"times\" using 1:2 title '' with impulse lt 2 lw 1 lc rgb \"#FF0000\"" >> $plot_info

	gnuplot <<EOF
	set autoscale 
	set grid
	set title "CPU utilization : All CPUs"
	set xlabel "Time"
	set ylabel "% CPU utilization"
	set xr [0:$xrange]
	set yr [0:100]
	set terminal png nocrop size 1024,768
	set output "$CPU_PLOT_OUTPUT"
        plot `cat $plot_info`
EOF
        rm $plot_info
}

function gen_vm_data()
{
	egrep -v 'memory|free' $VMSTAT_LOG  | awk '{print $4}' > vm_datafile
	totalmem=`grep -w ^MemTotal $SYSINFO | awk '{print $2}'`
	cat vm_datafile | sed "s/^/$totalmem-/g" | bc > memfile
}

function plot_vm_usage()
{
	vmstat_interval=5
	total_mem=`grep -w ^MemTotal $SYSINFO | awk '{print $2}'`
	xrange=$((`tail -1 times | awk '{print $1}'`+50))
	
	gnuplot <<EOF
	set autoscale 
	set grid
	set title "Memory utilization"
	set xlabel "Time"
	set ylabel "Memory utilization in bytes"
	set xr [0:$xrange]
	set yr [0:$total_mem]
	set terminal png nocrop size 1024,768
	set output "$VM_PLOT_OUTPUT"
	plot  "vm_datafile" using 1 title 'free-memory' with lines lt 1 lw 2, \
	      "memfile" using 1 title 'memory-usage' with lines lt 2 lw 2,\
	      "times" using 1:(\$2*$total_mem/100) title '' with impulse lt 2 lw 1 lc rgb "#FF0000"
EOF
}

function gen_cmp_data()
{
	perflog_baseline=$1
	perflog_current=$2
	
	time=0
	for op in `cat ops`
	do
	        time=0;
	        for i in `grep -w ^$op $perflog_baseline | awk '{print $2}'| cut -f1 -d'.'`
	        do
	                time=$((time+$i))
	        done;
	        time=$((time/3)) # Average over three runs
	        echo $time >> btimes.$$
	done
	
	for op in `cat ops`
	do
	        time=0;
	        for i in `grep -w ^$op $perflog_current | awk '{print $2}'| cut -f1 -d'.'`
	        do
	                time=$((time+$i))
	        done;
	        time=$((time/3)) # Average over three runs
	        echo $time >> ctimes.$$
	done
	
	paste -d " " ops btimes.$$ ctimes.$$ > $CMP_DATAFILE
	rm btimes.$$ ctimes.$$
}

function plot_comparison()
{
	a=`cat $CMP_DATAFILE | awk '{print $2"\n"$3}' | sort -n | tail -1`
	yrange=`echo $a + $a/5 | bc`
	b=`wc -l $CMP_DATAFILE | awk '{print $1}'`
	xrange=`echo $b - 0.5 | bc` 
	
	gnuplot <<EOF
	reset
	set key at graph 0.15, 0.85 horizontal samplen 0.1
	set style data histogram
	set style histogram cluster gap 1
	set style fill solid border -1
	set boxwidth 0.8
	set xtic rotate by 90 scale 0
	unset ytics
	set y2tics rotate by 90
	set terminal png nocrop size 1024,768
	set xlabel ' '
	set size 0.6, 1
	set yrange [0:$yrange]; set xrange [-0.5:$xrange]
	set y2label '$XLABEL' offset -2
	set label 1 '$YLABEL' at graph 0.5, -0.4 centre rotate by 180
	set label 2 '$LEGEND_A' at graph 0.05, 0.85 left rotate by 90
	set label 3 '$LEGEND_B' at graph 0.12, 0.85 left rotate by 90
	set label 4 '$PLOT_TITLE' at graph -0.01, 0.5 center rotate by 90
	set output "tmp.$$.png"
	p '$CMP_DATAFILE' u 2 title ' ', '' u 3 title ' ', '' u 0:(0):xticlabel(1) w l title ''
EOF
        convert tmp.$$.png -rotate 90 $CMP_PLOT_OUTPUT
        rm tmp.$$.png
}

# Generate CPU data
gen_cpu_data

# plot CPU data
plot_cpu_usage

# Generate VM data
gen_vm_data

# plot VM data
plot_vm_usage

# Generate comparison data - baseline vs current run
gen_cmp_data perf-fuse-ami.log perf-fuse-aws.log

# plot perf comparison - baseline vs current run
plot_comparison

# cleanup tmp files
rm vm_datafile memfile
rm cpu-* times

display cpu.png &
display vm.png &
display cmp.png &