Merge remote-tracking branch 'rcu/rcu/next'

[karo-tx-linux.git] / tools / testing / selftests / rcutorture / bin / kvm-recheck-rcuperf.sh

diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh
new file mode 100755 (executable)
index 0000000..8f3121a
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh
@@ -0,0 +1,96 @@
+#!/bin/bash
+#
+# Analyze a given results directory for rcuperf performance measurements.
+#
+# Usage: kvm-recheck-rcuperf.sh resdir
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, you can access it online at
+# http://www.gnu.org/licenses/gpl-2.0.html.
+#
+# Copyright (C) IBM Corporation, 2016
+#
+# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
+
+i="$1"
+if test -d $i
+then
+       :
+else
+       echo Unreadable results directory: $i
+       exit 1
+fi
+PATH=`pwd`/tools/testing/selftests/rcutorture/bin:$PATH; export PATH
+. tools/testing/selftests/rcutorture/bin/functions.sh
+
+if kvm-recheck-rcuperf-ftrace.sh $i
+then
+       # ftrace data was successfully analyzed, call it good!
+       exit 0
+fi
+
+configfile=`echo $i | sed -e 's/^.*\///'`
+
+sed -e 's/^\[[^]]*]//' < $i/console.log |
+awk '
+/-perf: .* gps: .* batches:/ {
+       ngps = $9;
+       nbatches = $11;
+}
+
+/-perf: .*writer-duration/ {
+       gptimes[++n] = $5 / 1000.;
+       sum += $5 / 1000.;
+}
+
+END {
+       newNR = asort(gptimes);
+       if (newNR <= 0) {
+               print "No rcuperf records found???"
+               exit;
+       }
+       pct50 = int(newNR * 50 / 100);
+       if (pct50 < 1)
+               pct50 = 1;
+       pct90 = int(newNR * 90 / 100);
+       if (pct90 < 1)
+               pct90 = 1;
+       pct99 = int(newNR * 99 / 100);
+       if (pct99 < 1)
+               pct99 = 1;
+       div = 10 ** int(log(gptimes[pct90]) / log(10) + .5) / 100;
+       print "Histogram bucket size: " div;
+       last = gptimes[1] - 10;
+       count = 0;
+       for (i = 1; i <= newNR; i++) {
+               current = div * int(gptimes[i] / div);
+               if (last == current) {
+                       count++;
+               } else {
+                       if (count > 0)
+                               print last, count;
+                       count = 1;
+                       last = current;
+               }
+       }
+       if (count > 0)
+               print last, count;
+       print "Average grace-period duration: " sum / newNR " microseconds";
+       print "Minimum grace-period duration: " gptimes[1];
+       print "50th percentile grace-period duration: " gptimes[pct50];
+       print "90th percentile grace-period duration: " gptimes[pct90];
+       print "99th percentile grace-period duration: " gptimes[pct99];
+       print "Maximum grace-period duration: " gptimes[newNR];
+       print "Grace periods: " ngps + 0 " Batches: " nbatches + 0 " Ratio: " ngps / nbatches;
+       print "Computed from rcuperf printk output.";
+}'