123 lines
3.2 KiB
Bash
Executable file
123 lines
3.2 KiB
Bash
Executable file
#!/bin/bash
|
|
#
|
|
# Analyze a given results directory for rcuperf performance measurements,
|
|
# looking for ftrace data. Exits with 0 if data was found, analyzed, and
|
|
# printed. Intended to be invoked from kvm-recheck-rcuperf.sh after
|
|
# argument checking.
|
|
#
|
|
# Usage: kvm-recheck-rcuperf-ftrace.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"
|
|
. functions.sh
|
|
|
|
if test "`grep -c 'rcu_exp_grace_period.*start' < $i/console.log`" -lt 100
|
|
then
|
|
exit 10
|
|
fi
|
|
|
|
sed -e 's/^\[[^]]*]//' < $i/console.log |
|
|
grep 'us : rcu_exp_grace_period' |
|
|
sed -e 's/us : / : /' |
|
|
tr -d '\015' |
|
|
awk '
|
|
$8 == "start" {
|
|
if (startseq != "")
|
|
nlost++;
|
|
starttask = $1;
|
|
starttime = $3;
|
|
startseq = $7;
|
|
seqtask[startseq] = starttask;
|
|
}
|
|
|
|
$8 == "end" {
|
|
if (startseq == $7) {
|
|
curgpdur = $3 - starttime;
|
|
gptimes[++n] = curgpdur;
|
|
gptaskcnt[starttask]++;
|
|
sum += curgpdur;
|
|
if (curgpdur > 1000)
|
|
print "Long GP " starttime "us to " $3 "us (" curgpdur "us)";
|
|
startseq = "";
|
|
} else {
|
|
# Lost a message or some such, reset.
|
|
startseq = "";
|
|
nlost++;
|
|
}
|
|
}
|
|
|
|
$8 == "done" && seqtask[$7] != $1 {
|
|
piggybackcnt[$1]++;
|
|
}
|
|
|
|
END {
|
|
newNR = asort(gptimes);
|
|
if (newNR <= 0) {
|
|
print "No ftrace records found???"
|
|
exit 10;
|
|
}
|
|
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 "Distribution of grace periods across tasks:";
|
|
for (i in gptaskcnt) {
|
|
print "\t" i, gptaskcnt[i];
|
|
nbatches += gptaskcnt[i];
|
|
}
|
|
ngps = nbatches;
|
|
print "Distribution of piggybacking across tasks:";
|
|
for (i in piggybackcnt) {
|
|
print "\t" i, piggybackcnt[i];
|
|
ngps += piggybackcnt[i];
|
|
}
|
|
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 " Lost: " nlost + 0;
|
|
print "Computed from ftrace data.";
|
|
}'
|
|
exit 0
|