mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-06 02:50:43 +00:00
Code Issues Releases Wiki Activity

rcutorture: Print measure of batching efficiency

Browse source 
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
Show stats Download patch file Download diff file Expand all files Collapse all files

26
tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh
View file

@ -34,33 +34,38 @@ fi
configfile=`echo $i | sed -e 's/^.*\///'` configfile=`echo $i | sed -e 's/^.*\///'`
grep -e '-perf:.*writer-duration' $i/console.log | sed -e 's/^\[[^]]*]//' | sed -e 's/^\[[^]]*]//' < $i/console.log |
awk ' awk '
{ /-perf: .* gps: .* batches:/ {
ngps = $9;
nbatches = $11;
}
/-perf: .*writer-duration/ {
gptimes[++n] = $5 / 1000.; gptimes[++n] = $5 / 1000.;
sum += $5 / 1000.; sum += $5 / 1000.;
} }
END { END {
if (NR <= 0) { newNR = asort(gptimes);
if (newNR <= 0) {
print "No rcuperf records found???" print "No rcuperf records found???"
exit; exit;
} }
asort(gptimes); pct50 = int(newNR * 50 / 100);
pct50 = int(NR * 50 / 100);
if (pct50 < 1) if (pct50 < 1)
pct50 = 1; pct50 = 1;
pct90 = int(NR * 90 / 100); pct90 = int(newNR * 90 / 100);
if (pct90 < 1) if (pct90 < 1)
pct90 = 1; pct90 = 1;
pct99 = int(NR * 99 / 100); pct99 = int(newNR * 99 / 100);
if (pct99 < 1) if (pct99 < 1)
pct99 = 1; pct99 = 1;
div = 10 ** int(log(gptimes[pct90]) / log(10) + .5) / 100; div = 10 ** int(log(gptimes[pct90]) / log(10) + .5) / 100;
print "Histogram bucket size: " div; print "Histogram bucket size: " div;
last = gptimes[1] - 10; last = gptimes[1] - 10;
count = 0; count = 0;
for (i = 1; i <= NR; i++) { for (i = 1; i <= newNR; i++) {
current = div * int(gptimes[i] / div); current = div * int(gptimes[i] / div);
if (last == current) { if (last == current) {
count++; count++;
@ -73,10 +78,11 @@ END {
} }
if (count > 0) if (count > 0)
print last, count; 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 "Minimum grace-period duration: " gptimes[1];
print "50th percentile grace-period duration: " gptimes[pct50]; print "50th percentile grace-period duration: " gptimes[pct50];
print "90th percentile grace-period duration: " gptimes[pct90]; print "90th percentile grace-period duration: " gptimes[pct90];
print "99th percentile grace-period duration: " gptimes[pct99]; 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;
}' }'