tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0+
   3 #
   4 # Analyze a given results directory for rcuperf performance measurements.
   5 #
   6 # Usage: kvm-recheck-rcuperf.sh resdir
   7 #
   8 # Copyright (C) IBM Corporation, 2016
   9 #
  10 # Authors: Paul E. McKenney <paulmck@linux.ibm.com>
  11
  12 i="$1"
  13 if test -d "$i" -a -r "$i"
  14 then
  15         :
  16 else
  17         echo Unreadable results directory: $i
  18         exit 1
  19 fi
  20 PATH=`pwd`/tools/testing/selftests/rcutorture/bin:$PATH; export PATH
  21 . functions.sh
  22
  23 if kvm-recheck-rcuperf-ftrace.sh $i
  24 then
  25         # ftrace data was successfully analyzed, call it good!
  26         exit 0
  27 fi
  28
  29 configfile=`echo $i | sed -e 's/^.*\///'`
  30
  31 sed -e 's/^\[[^]]*]//' < $i/console.log |
  32 awk '
  33 /-perf: .* gps: .* batches:/ {
  34         ngps = $9;
  35         nbatches = $11;
  36 }
  37
  38 /-perf: .*writer-duration/ {
  39         gptimes[++n] = $5 / 1000.;
  40         sum += $5 / 1000.;
  41 }
  42
  43 END {
  44         newNR = asort(gptimes);
  45         if (newNR <= 0) {
  46                 print "No rcuperf records found???"
  47                 exit;
  48         }
  49         pct50 = int(newNR * 50 / 100);
  50         if (pct50 < 1)
  51                 pct50 = 1;
  52         pct90 = int(newNR * 90 / 100);
  53         if (pct90 < 1)
  54                 pct90 = 1;
  55         pct99 = int(newNR * 99 / 100);
  56         if (pct99 < 1)
  57                 pct99 = 1;
  58         div = 10 ** int(log(gptimes[pct90]) / log(10) + .5) / 100;
  59         print "Histogram bucket size: " div;
  60         last = gptimes[1] - 10;
  61         count = 0;
  62         for (i = 1; i <= newNR; i++) {
  63                 current = div * int(gptimes[i] / div);
  64                 if (last == current) {
  65                         count++;
  66                 } else {
  67                         if (count > 0)
  68                                 print last, count;
  69                         count = 1;
  70                         last = current;
  71                 }
  72         }
  73         if (count > 0)
  74                 print last, count;
  75         print "Average grace-period duration: " sum / newNR " microseconds";
  76         print "Minimum grace-period duration: " gptimes[1];
  77         print "50th percentile grace-period duration: " gptimes[pct50];
  78         print "90th percentile grace-period duration: " gptimes[pct90];
  79         print "99th percentile grace-period duration: " gptimes[pct99];
  80         print "Maximum grace-period duration: " gptimes[newNR];
  81         print "Grace periods: " ngps + 0 " Batches: " nbatches + 0 " Ratio: " ngps / nbatches;
  82         print "Computed from rcuperf printk output.";
  83 }'