#!/bin/bash
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#
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# Analyze a given results directory for rcuperf performance measurements.
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#
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# Usage: kvm-recheck-rcuperf.sh resdir
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, you can access it online at
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# http://www.gnu.org/licenses/gpl-2.0.html.
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#
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# Copyright (C) IBM Corporation, 2016
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#
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# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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i="$1"
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if test -d "$i" -a -r "$i"
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then
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:
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else
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echo Unreadable results directory: $i
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exit 1
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fi
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PATH=`pwd`/tools/testing/selftests/rcutorture/bin:$PATH; export PATH
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. functions.sh
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if kvm-recheck-rcuperf-ftrace.sh $i
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then
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# ftrace data was successfully analyzed, call it good!
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exit 0
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fi
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configfile=`echo $i | sed -e 's/^.*\///'`
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sed -e 's/^\[[^]]*]//' < $i/console.log |
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awk '
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/-perf: .* gps: .* batches:/ {
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ngps = $9;
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nbatches = $11;
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}
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/-perf: .*writer-duration/ {
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gptimes[++n] = $5 / 1000.;
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sum += $5 / 1000.;
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}
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END {
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newNR = asort(gptimes);
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if (newNR <= 0) {
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print "No rcuperf records found???"
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exit;
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}
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pct50 = int(newNR * 50 / 100);
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if (pct50 < 1)
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pct50 = 1;
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pct90 = int(newNR * 90 / 100);
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if (pct90 < 1)
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pct90 = 1;
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pct99 = int(newNR * 99 / 100);
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if (pct99 < 1)
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pct99 = 1;
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div = 10 ** int(log(gptimes[pct90]) / log(10) + .5) / 100;
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print "Histogram bucket size: " div;
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last = gptimes[1] - 10;
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count = 0;
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for (i = 1; i <= newNR; i++) {
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current = div * int(gptimes[i] / div);
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if (last == current) {
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count++;
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} else {
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if (count > 0)
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print last, count;
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count = 1;
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last = current;
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}
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}
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if (count > 0)
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print last, count;
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print "Average grace-period duration: " sum / newNR " microseconds";
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print "Minimum grace-period duration: " gptimes[1];
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print "50th percentile grace-period duration: " gptimes[pct50];
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print "90th percentile grace-period duration: " gptimes[pct90];
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print "99th percentile grace-period duration: " gptimes[pct99];
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print "Maximum grace-period duration: " gptimes[newNR];
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print "Grace periods: " ngps + 0 " Batches: " nbatches + 0 " Ratio: " ngps / nbatches;
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print "Computed from rcuperf printk output.";
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}'
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