Add some performance measurements comparing 'xe sr-probe' time for re…

…gular open-iscsi (current-probe.dat) vs libiscsi (probe.dat)

Signed-off-by: David Scott <dave.scott@eu.citrix.com>

performance/LVMoISCSISR.patch

@@ -0,0 +1,16 @@
+--- /root/LVMoISCSISR	2011-07-12 17:21:39.000000000 +0100
++++ LVMoISCSISR	2011-07-12 17:33:19.000000000 +0100
+@@ -71,6 +71,13 @@
+             # This is a probe call, generate a temp sr_uuid
+             sr_uuid = util.gen_uuid()
+
++	    # Dave's new probe interface
++	    import iscsi
++	    target = self.dconf['target']
++	    iqn = self.dconf['targetIQN']
++	    print >>sys.stderr, iscsi.probe(target, iqn)
++	    raise "foo"
++
+         driver = SR.driver('iscsi')
+         if self.original_srcmd.dconf.has_key('target'):
+             self.original_srcmd.dconf['targetlist'] = self.original_srcmd.dconf['target']

performance/current-probe.dat

@@ -0,0 +1,192 @@
+# Number of LUNs, probe time
+1, 6.53
+2, 6.63
+3, 6.73
+4, 6.85
+5, 6.91
+6, 7.00
+7, 7.13
+8, 7.25
+9, 7.22
+10, 7.38
+11, 7.49
+12, 7.50
+13, 7.74
+14, 7.69
+15, 7.72
+16, 7.85
+17, 8.00
+18, 8.06
+19, 8.12
+20, 8.29
+21, 8.39
+22, 8.48
+23, 8.57
+24, 8.66
+25, 8.56
+26, 8.83
+27, 8.87
+28, 8.88
+29, 9.13
+30, 9.24
+31, 9.15
+32, 9.24
+33, 9.51
+34, 9.37
+35, 9.54
+36, 9.58
+37, 9.80
+38, 9.82
+39, 9.71
+40, 9.89
+41, 10.19
+42, 10.25
+43, 10.36
+44, 10.31
+45, 10.45
+46, 10.50
+47, 10.68
+48, 10.71
+49, 10.76
+50, 10.80
+51, 10.89
+52, 10.81
+53, 11.06
+54, 11.37
+55, 11.37
+56, 11.28
+57, 11.40
+58, 11.64
+59, 11.53
+60, 11.72
+61, 11.69
+62, 12.11
+63, 11.83
+64, 12.25
+65, 12.11
+66, 12.23
+67, 12.36
+68, 12.38
+69, 12.57
+70, 12.73
+71, 12.63
+72, 12.99
+73, 13.22
+74, 12.70
+75, 13.00
+76, 12.95
+77, 13.33
+78, 13.40
+79, 13.13
+80, 13.79
+81, 13.40
+82, 13.64
+83, 14.13
+84, 14.33
+85, 14.13
+86, 14.49
+87, 14.47
+88, 14.60
+89, 14.62
+90, 14.56
+91, 14.78
+92, 15.47
+93, 15.25
+94, 15.77
+95, 15.44
+96, 15.55
+97, 15.91
+98, 16.04
+99, 16.22
+100, 16.54
+101, 16.37
+102, 16.53
+103, 16.56
+104, 17.16
+105, 16.85
+106, 16.96
+107, 17.35
+108, 17.10
+109, 17.23
+110, 18.00
+111, 18.03
+112, 18.00
+113, 18.07
+114, 18.53
+115, 18.53
+116, 18.68
+117, 19.17
+118, 19.18
+119, 18.93
+120, 18.88
+121, 19.36
+122, 19.50
+123, 19.67
+124, 19.50
+125, 20.05
+126, 19.66
+127, 20.23
+128, 20.22
+129, 20.59
+130, 20.70
+131, 20.84
+132, 20.82
+133, 21.03
+134, 20.89
+135, 21.46
+136, 22.03
+137, 21.64
+138, 22.12
+139, 22.02
+140, 21.74
+141, 22.14
+142, 22.32
+143, 22.62
+144, 22.14
+145, 23.85
+146, 23.38
+147, 22.98
+148, 22.81
+149, 23.79
+150, 23.96
+151, 23.44
+152, 23.81
+153, 24.24
+154, 24.14
+155, 24.06
+156, 24.48
+157, 25.04
+158, 24.76
+159, 24.49
+160, 25.11
+161, 25.48
+162, 25.36
+163, 25.83
+164, 25.41
+165, 25.76
+166, 26.18
+167, 26.07
+168, 25.73
+169, 26.26
+170, 26.39
+171, 26.74
+172, 26.85
+173, 27.00
+174, 26.72
+175, 27.09
+176, 27.31
+177, 27.38
+178, 28.24
+179, 27.92
+180, 27.97
+181, 27.89
+182, 28.44
+183, 28.34
+184, 27.95
+185, 28.30
+186, 28.08
+187, 28.94
+188, 28.94
+189, 29.47
+190, 28.89
+191, 29.56

performance/graph.gp

@@ -0,0 +1,148 @@
+#!/usr/bin/gnuplot -persist
+#
+#    
+#    	G N U P L O T
+#    	Version 4.2 patchlevel 6 
+#    	last modified Sep 2009
+#    	System: Linux 2.6.32-31-generic-pae
+#    
+#    	Copyright (C) 1986 - 1993, 1998, 2004, 2007 - 2009
+#    	Thomas Williams, Colin Kelley and many others
+#    
+#    	Type `help` to access the on-line reference manual.
+#    	The gnuplot FAQ is available from http://www.gnuplot.info/faq/
+#    
+#    	Send bug reports and suggestions to <http://sourceforge.net/projects/gnuplot>
+#    
+# set terminal wxt 0
+# set output
+set terminal png
+unset clip points
+set clip one
+unset clip two
+set bar 1.000000
+set border 31 front linetype -1 linewidth 1.000
+set xdata
+set ydata
+set zdata
+set x2data
+set y2data
+set timefmt x "%d/%m/%y,%H:%M"
+set timefmt y "%d/%m/%y,%H:%M"
+set timefmt z "%d/%m/%y,%H:%M"
+set timefmt x2 "%d/%m/%y,%H:%M"
+set timefmt y2 "%d/%m/%y,%H:%M"
+set timefmt cb "%d/%m/%y,%H:%M"
+set boxwidth
+set style fill  empty border
+set style rectangle back fc lt -3 fillstyle  solid 1.00 border -1
+set dummy x,y
+set format x "% g"
+set format y "% g"
+set format x2 "% g"
+set format y2 "% g"
+set format z "% g"
+set format cb "% g"
+set angles radians
+unset grid
+set key title ""
+set key inside right top vertical Right noreverse enhanced autotitles nobox
+set key noinvert samplen 4 spacing 1 width 0 height 0 
+unset label
+unset arrow
+set style increment default
+unset style line
+unset style arrow
+set style histogram clustered gap 2 title  offset character 0, 0, 0
+unset logscale
+set offsets 0, 0, 0, 0
+set pointsize 1
+set encoding default
+unset polar
+unset parametric
+unset decimalsign
+set view 60, 30, 1, 1  
+set samples 100, 100
+set isosamples 10, 10
+set surface
+unset contour
+set clabel '%8.3g'
+set mapping cartesian
+set datafile separator whitespace
+unset hidden3d
+set cntrparam order 4
+set cntrparam linear
+set cntrparam levels auto 5
+set cntrparam points 5
+set size ratio 0 1,1
+set origin 0,0
+set style data points
+set style function lines
+set xzeroaxis linetype -2 linewidth 1.000
+set yzeroaxis linetype -2 linewidth 1.000
+set zzeroaxis linetype -2 linewidth 1.000
+set x2zeroaxis linetype -2 linewidth 1.000
+set y2zeroaxis linetype -2 linewidth 1.000
+set ticslevel 0.5
+set mxtics default
+set mytics default
+set mztics default
+set mx2tics default
+set my2tics default
+set mcbtics default
+set xtics border in scale 1,0.5 mirror norotate  offset character 0, 0, 0
+set xtics autofreq  norangelimit
+set ytics border in scale 1,0.5 mirror norotate  offset character 0, 0, 0
+set ytics autofreq  norangelimit
+set ztics border in scale 1,0.5 nomirror norotate  offset character 0, 0, 0
+set ztics autofreq  norangelimit
+set nox2tics
+set noy2tics
+set cbtics border in scale 1,0.5 mirror norotate  offset character 0, 0, 0
+set cbtics autofreq  norangelimit
+set title "LVMoISCSI \"xe sr-probe\" with target, targetIQN" 
+set title  offset character 0, 0, 0 font "" norotate
+set timestamp bottom 
+set timestamp "" 
+set timestamp  offset character 0, 0, 0 font "" norotate
+set rrange [ * : * ] noreverse nowriteback  # (currently [0.00000:10.0000] )
+set trange [ * : * ] noreverse nowriteback  # (currently [-5.00000:5.00000] )
+set urange [ * : * ] noreverse nowriteback  # (currently [-5.00000:5.00000] )
+set vrange [ * : * ] noreverse nowriteback  # (currently [-5.00000:5.00000] )
+set xlabel "Number of LUNs exposed" 
+set xlabel  offset character 0, 0, 0 font "" textcolor lt -1 norotate
+set x2label "" 
+set x2label  offset character 0, 0, 0 font "" textcolor lt -1 norotate
+set xrange [ * : * ] noreverse nowriteback  # (currently [-10.0000:10.0000] )
+set x2range [ * : * ] noreverse nowriteback  # (currently [-10.0000:10.0000] )
+set ylabel "Time/seconds" 
+set ylabel  offset character 0, 0, 0 font "" textcolor lt -1 rotate by 90
+set y2label "" 
+set y2label  offset character 0, 0, 0 font "" textcolor lt -1 rotate by 90
+set yrange [ * : * ] noreverse nowriteback  # (currently [-10.0000:10.0000] )
+set y2range [ * : * ] noreverse nowriteback  # (currently [-10.0000:10.0000] )
+set zlabel "" 
+set zlabel  offset character 0, 0, 0 font "" textcolor lt -1 norotate
+set zrange [ * : * ] noreverse nowriteback  # (currently [-10.0000:10.0000] )
+set cblabel "" 
+set cblabel  offset character 0, 0, 0 font "" textcolor lt -1 rotate by 90
+set cbrange [ * : * ] noreverse nowriteback  # (currently [-10.0000:10.0000] )
+set zero 1e-08
+set lmargin  -1
+set bmargin  -1
+set rmargin  -1
+set tmargin  -1
+set locale "C"
+set pm3d explicit at s
+set pm3d scansautomatic
+set pm3d interpolate 1,1 flush begin noftriangles nohidden3d corners2color mean
+set palette positive nops_allcF maxcolors 0 gamma 1.5 color model RGB 
+set palette rgbformulae 7, 5, 15
+set colorbox default
+set colorbox vertical origin screen 0.9, 0.2, 0 size screen 0.05, 0.6, 0 front bdefault
+set loadpath 
+set fontpath 
+set fit noerrorvariables
+GNUTERM = "wxt"
+plot "current-probe.dat" title 'trunk', "probe.dat" title 'using libiscsi'
+#    EOF