Commit-ID: e588f35492227cc4ab2cbfe95fd5f993a5086f9f
Gitweb: http://git.kernel.org/tip/e588f35492227cc4ab2cbfe95fd5f993a5086f9f
Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
AuthorDate: Tue, 12 Jan 2016 17:26:35 -0800
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Thu, 31 Mar 2016 13:37:40 -0700
rcutorture: Print measure of batching efficiency
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@xxxxxxxxxxxxxxxxxx>
---
.../rcutorture/bin/kvm-recheck-rcuperf.sh | 26 +++++++++++++---------
1 file changed, 16 insertions(+), 10 deletions(-)
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh
index e5b2817..1f72df8 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh
@@ -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;
}'
--
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