90 lines · bash
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