name : kvm-recheck-rcuscale.sh #!/bin/bash # SPDX-License-Identifier: GPL-2.0+ # # Analyze a given results directory for rcuscale scalability measurements. # # Usage: kvm-recheck-rcuscale.sh resdir # # Copyright (C) IBM Corporation, 2016 # # Authors: Paul E. McKenney <paulmck@linux.ibm.com> i="$1" if test -d "$i" -a -r "$i" then : else echo Unreadable results directory: $i exit 1 fi PATH=`pwd`/tools/testing/selftests/rcutorture/bin:$PATH; export PATH . functions.sh if kvm-recheck-rcuscale-ftrace.sh $i then # ftrace data was successfully analyzed, call it good! exit 0 fi configfile=`echo $i | sed -e 's/^.*\///'` sed -e 's/^\[[^]]*]//' < $i/console.log | awk ' /-scale: .* gps: .* batches:/ { ngps = $9; nbatches = 1; } /-scale: .*writer-duration/ { gptimes[++n] = $5 / 1000.; sum += $5 / 1000.; } /rcu_scale: Grace-period kthread CPU time/ { cputime = $6; } END { newNR = asort(gptimes); if (newNR <= 0) { print "No rcuscale records found???" exit; } pct50 = int(newNR * 50 / 100); if (pct50 < 1) pct50 = 1; pct90 = int(newNR * 90 / 100); if (pct90 < 1) pct90 = 1; 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 <= newNR; i++) { current = div * int(gptimes[i] / div); if (last == current) { count++; } else { if (count > 0) print last, count; count = 1; last = current; } } if (count > 0) print last, count; 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[newNR]; if (cputime != "") cpustr = " CPU: " cputime; print "Grace periods: " ngps + 0 " Batches: " nbatches + 0 " Ratio: " ngps / nbatches cpustr; print "Computed from rcuscale printk output."; }'