rcuperf: Change rcuperf to rcuscale

This commit further avoids conflation of rcuperf with the kernel's perf
feature by renaming kernel/rcu/rcuperf.c to kernel/rcu/rcuscale.c, and
also by similarly renaming the functions and variables inside this file.
This has the side effect of changing the names of the kernel boot
parameters, so kernel-parameters.txt and ver_functions.sh are also
updated.  The rcutorture --torture type was also updated from rcuperf
to rcuscale.

[ paulmck: Fix bugs located by Stephen Rothwell. ]
Reported-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

1 files changed, 0 insertions, 109 deletions

diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh
deleted file mode 100755
index 7d3c2be66c64..000000000000
--- a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh
+++ /dev/null
@@ -1,109 +0,0 @@
-#!/bin/bash
-# SPDX-License-Identifier: GPL-2.0+
-#
-# Analyze a given results directory for rcuperf performance measurements,
-# looking for ftrace data.  Exits with 0 if data was found, analyzed, and
-# printed.  Intended to be invoked from kvm-recheck-rcuperf.sh after
-# argument checking.
-#
-# Usage: kvm-recheck-rcuperf-ftrace.sh resdir
-#
-# Copyright (C) IBM Corporation, 2016
-#
-# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
-
-i="$1"
-. functions.sh
-
-if test "`grep -c 'rcu_exp_grace_period.*start' < $i/console.log`" -lt 100
-then
-	exit 10
-fi
-
-sed -e 's/^\[[^]]*]//' < $i/console.log |
-grep 'us : rcu_exp_grace_period' |
-sed -e 's/us : / : /' |
-tr -d '\015' |
-awk '
-$8 == "start" {
-	if (startseq != "")
-		nlost++;
-	starttask = $1;
-	starttime = $3;
-	startseq = $7;
-	seqtask[startseq] = starttask;
-}
-
-$8 == "end" {
-	if (startseq == $7) {
-		curgpdur = $3 - starttime;
-		gptimes[++n] = curgpdur;
-		gptaskcnt[starttask]++;
-		sum += curgpdur;
-		if (curgpdur > 1000)
-			print "Long GP " starttime "us to " $3 "us (" curgpdur "us)";
-		startseq = "";
-	} else {
-		# Lost a message or some such, reset.
-		startseq = "";
-		nlost++;
-	}
-}
-
-$8 == "done" && seqtask[$7] != $1 {
-	piggybackcnt[$1]++;
-}
-
-END {
-	newNR = asort(gptimes);
-	if (newNR <= 0) {
-		print "No ftrace records found???"
-		exit 10;
-	}
-	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 "Distribution of grace periods across tasks:";
-	for (i in gptaskcnt) {
-		print "\t" i, gptaskcnt[i];
-		nbatches += gptaskcnt[i];
-	}
-	ngps = nbatches;
-	print "Distribution of piggybacking across tasks:";
-	for (i in piggybackcnt) {
-		print "\t" i, piggybackcnt[i];
-		ngps += piggybackcnt[i];
-	}
-	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];
-	print "Grace periods: " ngps + 0 " Batches: " nbatches + 0 " Ratio: " ngps / nbatches " Lost: " nlost + 0;
-	print "Computed from ftrace data.";
-}'
-exit 0