brintos

brintos / linux-shallow public Read only

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1#!/bin/bash2# SPDX-License-Identifier: GPL-2.0+3#4# Analyze a given results directory for rcuscale scalability measurements.5#6# Usage: kvm-recheck-rcuscale.sh resdir7#8# Copyright (C) IBM Corporation, 20169#10# Authors: Paul E. McKenney <paulmck@linux.ibm.com>11 12i="$1"13if test -d "$i" -a -r "$i"14then15	:16else17	echo Unreadable results directory: $i18	exit 119fi20PATH=`pwd`/tools/testing/selftests/rcutorture/bin:$PATH; export PATH21. functions.sh22 23if kvm-recheck-rcuscale-ftrace.sh $i24then25	# ftrace data was successfully analyzed, call it good!26	exit 027fi28 29configfile=`echo $i | sed -e 's/^.*\///'`30 31sed -e 's/^\[[^]]*]//' < $i/console.log |32awk '33/-scale: .* gps: .* batches:/ {34	ngps = $9;35	nbatches = 1;36}37 38/-scale: .*writer-duration/ {39	gptimes[++n] = $5 / 1000.;40	sum += $5 / 1000.;41}42 43/rcu_scale: Grace-period kthread CPU time/ {44	cputime = $6;45}46 47END {48	newNR = asort(gptimes);49	if (newNR <= 0) {50		print "No rcuscale records found???"51		exit;52	}53	pct50 = int(newNR * 50 / 100);54	if (pct50 < 1)55		pct50 = 1;56	pct90 = int(newNR * 90 / 100);57	if (pct90 < 1)58		pct90 = 1;59	pct99 = int(newNR * 99 / 100);60	if (pct99 < 1)61		pct99 = 1;62	div = 10 ** int(log(gptimes[pct90]) / log(10) + .5) / 100;63	print "Histogram bucket size: " div;64	last = gptimes[1] - 10;65	count = 0;66	for (i = 1; i <= newNR; i++) {67		current = div * int(gptimes[i] / div);68		if (last == current) {69			count++;70		} else {71			if (count > 0)72				print last, count;73			count = 1;74			last = current;75		}76	}77	if (count > 0)78		print last, count;79	print "Average grace-period duration: " sum / newNR " microseconds";80	print "Minimum grace-period duration: " gptimes[1];81	print "50th percentile grace-period duration: " gptimes[pct50];82	print "90th percentile grace-period duration: " gptimes[pct90];83	print "99th percentile grace-period duration: " gptimes[pct99];84	print "Maximum grace-period duration: " gptimes[newNR];85	if (cputime != "")86		cpustr = " CPU: " cputime;87	print "Grace periods: " ngps + 0 " Batches: " nbatches + 0 " Ratio: " ngps / nbatches cpustr;88	print "Computed from rcuscale printk output.";89}'90