1 #!/bin/bash 2 # 3 # Analyze a given results directory for rcuperf performance measurements. 4 # 5 # Usage: kvm-recheck-rcuperf.sh resdir 6 # 7 # This program is free software; you can redistribute it and/or modify 8 # it under the terms of the GNU General Public License as published by 9 # the Free Software Foundation; either version 2 of the License, or 10 # (at your option) any later version. 11 # 12 # This program is distributed in the hope that it will be useful, 13 # but WITHOUT ANY WARRANTY; without even the implied warranty of 14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 # GNU General Public License for more details. 16 # 17 # You should have received a copy of the GNU General Public License 18 # along with this program; if not, you can access it online at 19 # http://www.gnu.org/licenses/gpl-2.0.html. 20 # 21 # Copyright (C) IBM Corporation, 2016 22 # 23 # Authors: Paul E. McKenney <paulmck (at] linux.vnet.ibm.com> 24 25 i="$1" 26 if test -d $i 27 then 28 : 29 else 30 echo Unreadable results directory: $i 31 exit 1 32 fi 33 PATH=`pwd`/tools/testing/selftests/rcutorture/bin:$PATH; export PATH 34 . tools/testing/selftests/rcutorture/bin/functions.sh 35 36 if kvm-recheck-rcuperf-ftrace.sh $i 37 then 38 # ftrace data was successfully analyzed, call it good! 39 exit 0 40 fi 41 42 configfile=`echo $i | sed -e 's/^.*\///'` 43 44 sed -e 's/^\[[^]]*]//' < $i/console.log | 45 awk ' 46 /-perf: .* gps: .* batches:/ { 47 ngps = $9; 48 nbatches = $11; 49 } 50 51 /-perf: .*writer-duration/ { 52 gptimes[++n] = $5 / 1000.; 53 sum += $5 / 1000.; 54 } 55 56 END { 57 newNR = asort(gptimes); 58 if (newNR <= 0) { 59 print "No rcuperf records found???" 60 exit; 61 } 62 pct50 = int(newNR * 50 / 100); 63 if (pct50 < 1) 64 pct50 = 1; 65 pct90 = int(newNR * 90 / 100); 66 if (pct90 < 1) 67 pct90 = 1; 68 pct99 = int(newNR * 99 / 100); 69 if (pct99 < 1) 70 pct99 = 1; 71 div = 10 ** int(log(gptimes[pct90]) / log(10) + .5) / 100; 72 print "Histogram bucket size: " div; 73 last = gptimes[1] - 10; 74 count = 0; 75 for (i = 1; i <= newNR; i++) { 76 current = div * int(gptimes[i] / div); 77 if (last == current) { 78 count++; 79 } else { 80 if (count > 0) 81 print last, count; 82 count = 1; 83 last = current; 84 } 85 } 86 if (count > 0) 87 print last, count; 88 print "Average grace-period duration: " sum / newNR " microseconds"; 89 print "Minimum grace-period duration: " gptimes[1]; 90 print "50th percentile grace-period duration: " gptimes[pct50]; 91 print "90th percentile grace-period duration: " gptimes[pct90]; 92 print "99th percentile grace-period duration: " gptimes[pct99]; 93 print "Maximum grace-period duration: " gptimes[newNR]; 94 print "Grace periods: " ngps + 0 " Batches: " nbatches + 0 " Ratio: " ngps / nbatches; 95 print "Computed from rcuperf printk output."; 96 }' 97
