xref: /linux/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuscale.sh (revision 26fbb4c8c7c3ee9a4c3b4de555a8587b5a19154e) 
1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0+
3#
4# Analyze a given results directory for rcuscale scalability measurements.
5#
6# Usage: kvm-recheck-rcuscale.sh resdir
7#
8# Copyright (C) IBM Corporation, 2016
9#
10# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
11
12i="$1"
13if test -d "$i" -a -r "$i"
14then
15	:
16else
17	echo Unreadable results directory: $i
18	exit 1
19fi
20PATH=`pwd`/tools/testing/selftests/rcutorture/bin:$PATH; export PATH
21. functions.sh
22
23if kvm-recheck-rcuscale-ftrace.sh $i
24then
25	# ftrace data was successfully analyzed, call it good!
26	exit 0
27fi
28
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
43END {
44	newNR = asort(gptimes);
45	if (newNR <= 0) {
46		print "No rcuscale records found???"
47		exit;
48	}
49	pct50 = int(newNR * 50 / 100);
50	if (pct50 < 1)
51		pct50 = 1;
52	pct90 = int(newNR * 90 / 100);
53	if (pct90 < 1)
54		pct90 = 1;
55	pct99 = int(newNR * 99 / 100);
56	if (pct99 < 1)
57		pct99 = 1;
58	div = 10 ** int(log(gptimes[pct90]) / log(10) + .5) / 100;
59	print "Histogram bucket size: " div;
60	last = gptimes[1] - 10;
61	count = 0;
62	for (i = 1; i <= newNR; i++) {
63		current = div * int(gptimes[i] / div);
64		if (last == current) {
65			count++;
66		} else {
67			if (count > 0)
68				print last, count;
69			count = 1;
70			last = current;
71		}
72	}
73	if (count > 0)
74		print last, count;
75	print "Average grace-period duration: " sum / newNR " microseconds";
76	print "Minimum grace-period duration: " gptimes[1];
77	print "50th percentile grace-period duration: " gptimes[pct50];
78	print "90th percentile grace-period duration: " gptimes[pct90];
79	print "99th percentile grace-period duration: " gptimes[pct99];
80	print "Maximum grace-period duration: " gptimes[newNR];
81	print "Grace periods: " ngps + 0 " Batches: " nbatches + 0 " Ratio: " ngps / nbatches;
82	print "Computed from rcuscale printk output.";
83}'
84