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rcutorture: Print measure of batching efficiency

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This commit adds a line giving the number of grace periods, the number
of batches, and the ratio.  The larger the ratio, the greater the
batching efficiency.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2016-01-12 17:26:35 -08:00
parent 2094c99558
commit e588f35492
1 changed files with 16 additions and 10 deletions
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26
tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh
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@ -34,33 +34,38 @@ fi
configfile=`echo $i | sed -e 's/^.*\///'`
grep -e '-perf:.*writer-duration' $i/console.log | 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 {
if (NR <= 0) {
newNR = asort(gptimes);
if (newNR <= 0) {
print "No rcuperf records found???"
exit;
}
asort(gptimes);
pct50 = int(NR * 50 / 100);
pct50 = int(newNR * 50 / 100);
if (pct50 < 1)
pct50 = 1;
pct90 = int(NR * 90 / 100);
pct90 = int(newNR * 90 / 100);
if (pct90 < 1)
pct90 = 1;
pct99 = int(NR * 99 / 100);
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 <= NR; i++) {
for (i = 1; i <= newNR; i++) {
current = div * int(gptimes[i] / div);
if (last == current) {
count++;
@ -73,10 +78,11 @@ END {
}
if (count > 0)
print last, count;
print "Average grace-period duration: " sum / NR " microseconds";
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[NR];
print "Maximum grace-period duration: " gptimes[newNR];
print "Grace periods: " ngps + 0 " Batches: " nbatches + 0 " Ratio: " ngps / nbatches;
}'