3 # Analyze a given results directory for rcuperf performance measurements.
5 # Usage: kvm-recheck-rcuperf.sh resdir
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.
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.
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.
21 # Copyright (C) IBM Corporation, 2016
23 # Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
30 echo Unreadable results directory
: $i
33 PATH
=`pwd`/tools
/testing
/selftests
/rcutorture
/bin
:$PATH; export PATH
34 . tools
/testing
/selftests
/rcutorture
/bin
/functions.sh
36 if kvm-recheck-rcuperf-ftrace.sh
$i
38 # ftrace data was successfully analyzed, call it good!
42 configfile
=`echo $i | sed -e 's/^.*\///'`
44 sed -e 's/^\[[^]]*]//' < $i/console.log |
46 /-perf: .* gps: .* batches:/ {
51 /-perf: .*writer-duration/ {
52 gptimes[++n] = $5 / 1000.;
57 newNR = asort(gptimes);
59 print "No rcuperf records found???"
62 pct50 = int(newNR * 50 / 100);
65 pct90 = int(newNR * 90 / 100);
68 pct99 = int(newNR * 99 / 100);
71 div = 10 ** int(log(gptimes[pct90]) / log(10) + .5) / 100;
72 print "Histogram bucket size: " div;
73 last = gptimes[1] - 10;
75 for (i = 1; i <= newNR; i++) {
76 current = div * int(gptimes[i] / div);
77 if (last == current) {
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.";