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Commit e588f354 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

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: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent 2094c995

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

+16 −10
Original line number Diff line number Diff line
@@ -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;

}'