From 687d4775db56d24c81b4704056186d6c506de30d Mon Sep 17 00:00:00 2001
From: "Paul E. McKenney" <paulmck@kernel.org>
Date: Tue, 30 Jun 2020 13:37:22 -0700
Subject: torture: Declare parse-console.sh independence from rcutorture

Currently, parse-torture.sh looks at the fifth field of torture-test
console output for the version number.  This works fine for rcutorture,
but not for scftorture, which lacks the pointer field.  This commit
therefore adjusts matching lines so that the parse-console.sh awk script
always sees the version number as the first field in the lines passed
to it.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
 tools/testing/selftests/rcutorture/bin/parse-console.sh | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

(limited to 'tools')

diff --git a/tools/testing/selftests/rcutorture/bin/parse-console.sh b/tools/testing/selftests/rcutorture/bin/parse-console.sh
index 71a9f43a3918..4e081a25761e 100755
--- a/tools/testing/selftests/rcutorture/bin/parse-console.sh
+++ b/tools/testing/selftests/rcutorture/bin/parse-console.sh
@@ -67,6 +67,7 @@ then
 	grep --binary-files=text 'torture:.*ver:' $file |
 	egrep --binary-files=text -v '\(null\)|rtc: 000000000* ' |
 	sed -e 's/^(initramfs)[^]]*] //' -e 's/^\[[^]]*] //' |
+	sed -e 's/^.*ver: //' |
 	awk '
 	BEGIN	{
 		ver = 0;
@@ -74,13 +75,13 @@ then
 		}
 
 		{
-		if (!badseq && ($5 + 0 != $5 || $5 <= ver)) {
+		if (!badseq && ($1 + 0 != $1 || $1 <= ver)) {
 			badseqno1 = ver;
-			badseqno2 = $5;
+			badseqno2 = $1;
 			badseqnr = NR;
 			badseq = 1;
 		}
-		ver = $5
+		ver = $1
 		}
 
 	END	{
-- 
cgit v1.2.3


From 80c9476e683ec37ba45fd8e6a5c5081bea207e1a Mon Sep 17 00:00:00 2001
From: "Paul E. McKenney" <paulmck@kernel.org>
Date: Wed, 24 Jun 2020 17:57:07 -0700
Subject: torture: Add scftorture to the rcutorture scripting

This commit updates the rcutorture scripting to include the new scftorture
torture-test module.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
 .../selftests/rcutorture/bin/kvm-recheck-scf.sh    | 38 ++++++++++++++++++++++
 tools/testing/selftests/rcutorture/bin/kvm.sh      |  2 +-
 .../selftests/rcutorture/configs/scf/CFLIST        |  2 ++
 .../selftests/rcutorture/configs/scf/CFcommon      |  2 ++
 .../selftests/rcutorture/configs/scf/NOPREEMPT     |  9 +++++
 .../rcutorture/configs/scf/NOPREEMPT.boot          |  1 +
 .../selftests/rcutorture/configs/scf/PREEMPT       |  9 +++++
 .../rcutorture/configs/scf/ver_functions.sh        | 30 +++++++++++++++++
 8 files changed, 92 insertions(+), 1 deletion(-)
 create mode 100755 tools/testing/selftests/rcutorture/bin/kvm-recheck-scf.sh
 create mode 100644 tools/testing/selftests/rcutorture/configs/scf/CFLIST
 create mode 100644 tools/testing/selftests/rcutorture/configs/scf/CFcommon
 create mode 100644 tools/testing/selftests/rcutorture/configs/scf/NOPREEMPT
 create mode 100644 tools/testing/selftests/rcutorture/configs/scf/NOPREEMPT.boot
 create mode 100644 tools/testing/selftests/rcutorture/configs/scf/PREEMPT
 create mode 100644 tools/testing/selftests/rcutorture/configs/scf/ver_functions.sh

(limited to 'tools')

diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck-scf.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck-scf.sh
new file mode 100755
index 000000000000..671bfee4fcef
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck-scf.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Analyze a given results directory for rcutorture progress.
+#
+# Usage: kvm-recheck-rcu.sh resdir
+#
+# Copyright (C) Facebook, 2020
+#
+# Authors: Paul E. McKenney <paulmck@kernel.org>
+
+i="$1"
+if test -d "$i" -a -r "$i"
+then
+	:
+else
+	echo Unreadable results directory: $i
+	exit 1
+fi
+. functions.sh
+
+configfile=`echo $i | sed -e 's/^.*\///'`
+nscfs="`grep 'scf_invoked_count ver:' $i/console.log 2> /dev/null | tail -1 | sed -e 's/^.* scf_invoked_count ver: //' -e 's/ .*$//' | tr -d '\015'`"
+if test -z "$nscfs"
+then
+	echo "$configfile ------- "
+else
+	dur="`sed -e 's/^.* scftorture.shutdown_secs=//' -e 's/ .*$//' < $i/qemu-cmd 2> /dev/null`"
+	if test -z "$dur"
+	then
+		rate=""
+	else
+		nscfss=`awk -v nscfs=$nscfs -v dur=$dur '
+			BEGIN { print nscfs / dur }' < /dev/null`
+		rate=" ($nscfss/s)"
+	fi
+	echo "${configfile} ------- ${nscfs} SCF handler invocations$rate"
+fi
diff --git a/tools/testing/selftests/rcutorture/bin/kvm.sh b/tools/testing/selftests/rcutorture/bin/kvm.sh
index e655983b7429..44dfdd9be67e 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm.sh
@@ -184,7 +184,7 @@ do
 		shift
 		;;
 	--torture)
-		checkarg --torture "(suite name)" "$#" "$2" '^\(lock\|rcu\|rcuperf\|refscale\)$' '^--'
+		checkarg --torture "(suite name)" "$#" "$2" '^\(lock\|rcu\|rcuperf\|refscale\|scf\)$' '^--'
 		TORTURE_SUITE=$2
 		shift
 		if test "$TORTURE_SUITE" = rcuperf || test "$TORTURE_SUITE" = refscale
diff --git a/tools/testing/selftests/rcutorture/configs/scf/CFLIST b/tools/testing/selftests/rcutorture/configs/scf/CFLIST
new file mode 100644
index 000000000000..4d62eb4a39f9
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/scf/CFLIST
@@ -0,0 +1,2 @@
+NOPREEMPT
+PREEMPT
diff --git a/tools/testing/selftests/rcutorture/configs/scf/CFcommon b/tools/testing/selftests/rcutorture/configs/scf/CFcommon
new file mode 100644
index 000000000000..c11ab91f49f5
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/scf/CFcommon
@@ -0,0 +1,2 @@
+CONFIG_SCF_TORTURE_TEST=y
+CONFIG_PRINTK_TIME=y
diff --git a/tools/testing/selftests/rcutorture/configs/scf/NOPREEMPT b/tools/testing/selftests/rcutorture/configs/scf/NOPREEMPT
new file mode 100644
index 000000000000..b8429d6c6ebc
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/scf/NOPREEMPT
@@ -0,0 +1,9 @@
+CONFIG_SMP=y
+CONFIG_PREEMPT_NONE=y
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=n
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=n
+CONFIG_NO_HZ_FULL=y
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_PROVE_LOCKING=n
diff --git a/tools/testing/selftests/rcutorture/configs/scf/NOPREEMPT.boot b/tools/testing/selftests/rcutorture/configs/scf/NOPREEMPT.boot
new file mode 100644
index 000000000000..d6a7fa097c2e
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/scf/NOPREEMPT.boot
@@ -0,0 +1 @@
+nohz_full=1
diff --git a/tools/testing/selftests/rcutorture/configs/scf/PREEMPT b/tools/testing/selftests/rcutorture/configs/scf/PREEMPT
new file mode 100644
index 000000000000..ae4992b141b0
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/scf/PREEMPT
@@ -0,0 +1,9 @@
+CONFIG_SMP=y
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=y
+CONFIG_NO_HZ_FULL=n
+CONFIG_DEBUG_LOCK_ALLOC=y
+CONFIG_PROVE_LOCKING=y
diff --git a/tools/testing/selftests/rcutorture/configs/scf/ver_functions.sh b/tools/testing/selftests/rcutorture/configs/scf/ver_functions.sh
new file mode 100644
index 000000000000..d3d9e35d3d55
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/scf/ver_functions.sh
@@ -0,0 +1,30 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Torture-suite-dependent shell functions for the rest of the scripts.
+#
+# Copyright (C) Facebook, 2020
+#
+# Authors: Paul E. McKenney <paulmck@kernel.org>
+
+# scftorture_param_onoff bootparam-string config-file
+#
+# Adds onoff scftorture module parameters to kernels having it.
+scftorture_param_onoff () {
+	if ! bootparam_hotplug_cpu "$1" && configfrag_hotplug_cpu "$2"
+	then
+		echo CPU-hotplug kernel, adding scftorture onoff. 1>&2
+		echo scftorture.onoff_interval=1000 scftorture.onoff_holdoff=30
+	fi
+}
+
+# per_version_boot_params bootparam-string config-file seconds
+#
+# Adds per-version torture-module parameters to kernels supporting them.
+per_version_boot_params () {
+	echo $1 `scftorture_param_onoff "$1" "$2"` \
+		scftorture.stat_interval=15 \
+		scftorture.shutdown_secs=$3 \
+		scftorture.verbose=1 \
+		scf
+}
-- 
cgit v1.2.3


From 4e88ec4a9eb17527e640b063f79e5b875733eb53 Mon Sep 17 00:00:00 2001
From: "Paul E. McKenney" <paulmck@kernel.org>
Date: Tue, 11 Aug 2020 21:18:12 -0700
Subject: 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>
---
 .../rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh   | 109 ---------------------
 .../rcutorture/bin/kvm-recheck-rcuperf.sh          |  83 ----------------
 .../rcutorture/bin/kvm-recheck-rcuscale-ftrace.sh  | 109 +++++++++++++++++++++
 .../rcutorture/bin/kvm-recheck-rcuscale.sh         |  83 ++++++++++++++++
 tools/testing/selftests/rcutorture/bin/kvm.sh      |   8 +-
 .../selftests/rcutorture/bin/parse-console.sh      |   4 +-
 .../selftests/rcutorture/configs/rcuperf/CFLIST    |   1 -
 .../selftests/rcutorture/configs/rcuperf/CFcommon  |   2 -
 .../selftests/rcutorture/configs/rcuperf/TINY      |  16 ---
 .../selftests/rcutorture/configs/rcuperf/TREE      |  19 ----
 .../selftests/rcutorture/configs/rcuperf/TREE54    |  22 -----
 .../rcutorture/configs/rcuperf/ver_functions.sh    |  16 ---
 .../selftests/rcutorture/configs/rcuscale/CFLIST   |   1 +
 .../selftests/rcutorture/configs/rcuscale/CFcommon |   2 +
 .../selftests/rcutorture/configs/rcuscale/TINY     |  16 +++
 .../selftests/rcutorture/configs/rcuscale/TREE     |  19 ++++
 .../selftests/rcutorture/configs/rcuscale/TREE54   |  22 +++++
 .../rcutorture/configs/rcuscale/ver_functions.sh   |  16 +++
 18 files changed, 274 insertions(+), 274 deletions(-)
 delete mode 100755 tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh
 delete mode 100755 tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh
 create mode 100755 tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuscale-ftrace.sh
 create mode 100755 tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuscale.sh
 delete mode 100644 tools/testing/selftests/rcutorture/configs/rcuperf/CFLIST
 delete mode 100644 tools/testing/selftests/rcutorture/configs/rcuperf/CFcommon
 delete mode 100644 tools/testing/selftests/rcutorture/configs/rcuperf/TINY
 delete mode 100644 tools/testing/selftests/rcutorture/configs/rcuperf/TREE
 delete mode 100644 tools/testing/selftests/rcutorture/configs/rcuperf/TREE54
 delete mode 100644 tools/testing/selftests/rcutorture/configs/rcuperf/ver_functions.sh
 create mode 100644 tools/testing/selftests/rcutorture/configs/rcuscale/CFLIST
 create mode 100644 tools/testing/selftests/rcutorture/configs/rcuscale/CFcommon
 create mode 100644 tools/testing/selftests/rcutorture/configs/rcuscale/TINY
 create mode 100644 tools/testing/selftests/rcutorture/configs/rcuscale/TREE
 create mode 100644 tools/testing/selftests/rcutorture/configs/rcuscale/TREE54
 create mode 100644 tools/testing/selftests/rcutorture/configs/rcuscale/ver_functions.sh

(limited to 'tools')

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
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh
deleted file mode 100755
index db0375a57f28..000000000000
--- a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh
+++ /dev/null
@@ -1,83 +0,0 @@
-#!/bin/bash
-# SPDX-License-Identifier: GPL-2.0+
-#
-# Analyze a given results directory for rcuperf performance measurements.
-#
-# Usage: kvm-recheck-rcuperf.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-rcuperf-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 '
-/-perf: .* gps: .* batches:/ {
-	ngps = $9;
-	nbatches = $11;
-}
-
-/-perf: .*writer-duration/ {
-	gptimes[++n] = $5 / 1000.;
-	sum += $5 / 1000.;
-}
-
-END {
-	newNR = asort(gptimes);
-	if (newNR <= 0) {
-		print "No rcuperf 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];
-	print "Grace periods: " ngps + 0 " Batches: " nbatches + 0 " Ratio: " ngps / nbatches;
-	print "Computed from rcuperf printk output.";
-}'
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuscale-ftrace.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuscale-ftrace.sh
new file mode 100755
index 000000000000..d4bec538086d
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuscale-ftrace.sh
@@ -0,0 +1,109 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Analyze a given results directory for rcuscale performance measurements,
+# looking for ftrace data.  Exits with 0 if data was found, analyzed, and
+# printed.  Intended to be invoked from kvm-recheck-rcuscale.sh after
+# argument checking.
+#
+# Usage: kvm-recheck-rcuscale-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
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuscale.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuscale.sh
new file mode 100755
index 000000000000..aa745152a525
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuscale.sh
@@ -0,0 +1,83 @@
+#!/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 = $11;
+}
+
+/-scale: .*writer-duration/ {
+	gptimes[++n] = $5 / 1000.;
+	sum += $5 / 1000.;
+}
+
+END {
+	newNR = asort(gptimes);
+	if (newNR <= 0) {
+		print "No rcuscale records found???"
+		exit;
+	}
+	pct50 = int(newNR * 50 / 100);
+	if (pct50 < 1)
+		pct50 = 1;
+	pct90 = int(newNR * 90 / 100);
+	if (pct90 < 1)
+		pct90 = 1;
+	pct99 = int(newNR * 99 / 100);
+	if (pct99 < 1)
+		pct99 = 1;
+	div = 10 ** int(log(gptimes[pct90]) / log(10) + .5) / 100;
+	print "Histogram bucket size: " div;
+	last = gptimes[1] - 10;
+	count = 0;
+	for (i = 1; i <= newNR; i++) {
+		current = div * int(gptimes[i] / div);
+		if (last == current) {
+			count++;
+		} else {
+			if (count > 0)
+				print last, count;
+			count = 1;
+			last = current;
+		}
+	}
+	if (count > 0)
+		print last, count;
+	print "Average grace-period duration: " sum / newNR " microseconds";
+	print "Minimum grace-period duration: " gptimes[1];
+	print "50th percentile grace-period duration: " gptimes[pct50];
+	print "90th percentile grace-period duration: " gptimes[pct90];
+	print "99th percentile grace-period duration: " gptimes[pct99];
+	print "Maximum grace-period duration: " gptimes[newNR];
+	print "Grace periods: " ngps + 0 " Batches: " nbatches + 0 " Ratio: " ngps / nbatches;
+	print "Computed from rcuscale printk output.";
+}'
diff --git a/tools/testing/selftests/rcutorture/bin/kvm.sh b/tools/testing/selftests/rcutorture/bin/kvm.sh
index 44dfdd9be67e..0489c198a72a 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm.sh
@@ -65,7 +65,7 @@ usage () {
 	echo "       --qemu-args qemu-arguments"
 	echo "       --qemu-cmd qemu-system-..."
 	echo "       --results absolute-pathname"
-	echo "       --torture rcu"
+	echo "       --torture lock|rcu|rcuscale|refscale|scf"
 	echo "       --trust-make"
 	exit 1
 }
@@ -184,13 +184,13 @@ do
 		shift
 		;;
 	--torture)
-		checkarg --torture "(suite name)" "$#" "$2" '^\(lock\|rcu\|rcuperf\|refscale\|scf\)$' '^--'
+		checkarg --torture "(suite name)" "$#" "$2" '^\(lock\|rcu\|rcuscale\|refscale\|scf\)$' '^--'
 		TORTURE_SUITE=$2
 		shift
-		if test "$TORTURE_SUITE" = rcuperf || test "$TORTURE_SUITE" = refscale
+		if test "$TORTURE_SUITE" = rcuscale || test "$TORTURE_SUITE" = refscale
 		then
 			# If you really want jitter for refscale or
-			# rcuperf, specify it after specifying the rcuperf
+			# rcuscale, specify it after specifying the rcuscale
 			# or the refscale.  (But why jitter in these cases?)
 			jitter=0
 		fi
diff --git a/tools/testing/selftests/rcutorture/bin/parse-console.sh b/tools/testing/selftests/rcutorture/bin/parse-console.sh
index 4e081a25761e..e03338091a06 100755
--- a/tools/testing/selftests/rcutorture/bin/parse-console.sh
+++ b/tools/testing/selftests/rcutorture/bin/parse-console.sh
@@ -33,8 +33,8 @@ then
 fi
 cat /dev/null > $file.diags
 
-# Check for proper termination, except for rcuperf and refscale.
-if test "$TORTURE_SUITE" != rcuperf && test "$TORTURE_SUITE" != refscale
+# Check for proper termination, except for rcuscale and refscale.
+if test "$TORTURE_SUITE" != rcuscale && test "$TORTURE_SUITE" != refscale
 then
 	# check for abject failure
 
diff --git a/tools/testing/selftests/rcutorture/configs/rcuperf/CFLIST b/tools/testing/selftests/rcutorture/configs/rcuperf/CFLIST
deleted file mode 100644
index c9f56cf20775..000000000000
--- a/tools/testing/selftests/rcutorture/configs/rcuperf/CFLIST
+++ /dev/null
@@ -1 +0,0 @@
-TREE
diff --git a/tools/testing/selftests/rcutorture/configs/rcuperf/CFcommon b/tools/testing/selftests/rcutorture/configs/rcuperf/CFcommon
deleted file mode 100644
index a09816b8c0f3..000000000000
--- a/tools/testing/selftests/rcutorture/configs/rcuperf/CFcommon
+++ /dev/null
@@ -1,2 +0,0 @@
-CONFIG_RCU_PERF_TEST=y
-CONFIG_PRINTK_TIME=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcuperf/TINY b/tools/testing/selftests/rcutorture/configs/rcuperf/TINY
deleted file mode 100644
index fb05ef5279b4..000000000000
--- a/tools/testing/selftests/rcutorture/configs/rcuperf/TINY
+++ /dev/null
@@ -1,16 +0,0 @@
-CONFIG_SMP=n
-CONFIG_PREEMPT_NONE=y
-CONFIG_PREEMPT_VOLUNTARY=n
-CONFIG_PREEMPT=n
-#CHECK#CONFIG_TINY_RCU=y
-CONFIG_HZ_PERIODIC=n
-CONFIG_NO_HZ_IDLE=y
-CONFIG_NO_HZ_FULL=n
-CONFIG_RCU_FAST_NO_HZ=n
-CONFIG_RCU_NOCB_CPU=n
-CONFIG_DEBUG_LOCK_ALLOC=n
-CONFIG_PROVE_LOCKING=n
-CONFIG_RCU_BOOST=n
-CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
-CONFIG_RCU_EXPERT=y
-CONFIG_RCU_TRACE=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcuperf/TREE b/tools/testing/selftests/rcutorture/configs/rcuperf/TREE
deleted file mode 100644
index 721cfda76ab2..000000000000
--- a/tools/testing/selftests/rcutorture/configs/rcuperf/TREE
+++ /dev/null
@@ -1,19 +0,0 @@
-CONFIG_SMP=y
-CONFIG_PREEMPT_NONE=n
-CONFIG_PREEMPT_VOLUNTARY=n
-CONFIG_PREEMPT=y
-#CHECK#CONFIG_PREEMPT_RCU=y
-CONFIG_HZ_PERIODIC=n
-CONFIG_NO_HZ_IDLE=y
-CONFIG_NO_HZ_FULL=n
-CONFIG_RCU_FAST_NO_HZ=n
-CONFIG_HOTPLUG_CPU=n
-CONFIG_SUSPEND=n
-CONFIG_HIBERNATION=n
-CONFIG_RCU_NOCB_CPU=n
-CONFIG_DEBUG_LOCK_ALLOC=n
-CONFIG_PROVE_LOCKING=n
-CONFIG_RCU_BOOST=n
-CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
-CONFIG_RCU_EXPERT=y
-CONFIG_RCU_TRACE=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcuperf/TREE54 b/tools/testing/selftests/rcutorture/configs/rcuperf/TREE54
deleted file mode 100644
index 7629f5dd73b2..000000000000
--- a/tools/testing/selftests/rcutorture/configs/rcuperf/TREE54
+++ /dev/null
@@ -1,22 +0,0 @@
-CONFIG_SMP=y
-CONFIG_NR_CPUS=54
-CONFIG_PREEMPT_NONE=n
-CONFIG_PREEMPT_VOLUNTARY=n
-CONFIG_PREEMPT=y
-#CHECK#CONFIG_PREEMPT_RCU=y
-CONFIG_HZ_PERIODIC=n
-CONFIG_NO_HZ_IDLE=y
-CONFIG_NO_HZ_FULL=n
-CONFIG_RCU_FAST_NO_HZ=n
-CONFIG_HOTPLUG_CPU=n
-CONFIG_SUSPEND=n
-CONFIG_HIBERNATION=n
-CONFIG_RCU_FANOUT=3
-CONFIG_RCU_FANOUT_LEAF=2
-CONFIG_RCU_NOCB_CPU=n
-CONFIG_DEBUG_LOCK_ALLOC=n
-CONFIG_PROVE_LOCKING=n
-CONFIG_RCU_BOOST=n
-CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
-CONFIG_RCU_EXPERT=y
-CONFIG_RCU_TRACE=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcuperf/ver_functions.sh b/tools/testing/selftests/rcutorture/configs/rcuperf/ver_functions.sh
deleted file mode 100644
index 777d5b0c190f..000000000000
--- a/tools/testing/selftests/rcutorture/configs/rcuperf/ver_functions.sh
+++ /dev/null
@@ -1,16 +0,0 @@
-#!/bin/bash
-# SPDX-License-Identifier: GPL-2.0+
-#
-# Torture-suite-dependent shell functions for the rest of the scripts.
-#
-# Copyright (C) IBM Corporation, 2015
-#
-# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
-
-# per_version_boot_params bootparam-string config-file seconds
-#
-# Adds per-version torture-module parameters to kernels supporting them.
-per_version_boot_params () {
-	echo $1 rcuperf.shutdown=1 \
-		rcuperf.verbose=1
-}
diff --git a/tools/testing/selftests/rcutorture/configs/rcuscale/CFLIST b/tools/testing/selftests/rcutorture/configs/rcuscale/CFLIST
new file mode 100644
index 000000000000..c9f56cf20775
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcuscale/CFLIST
@@ -0,0 +1 @@
+TREE
diff --git a/tools/testing/selftests/rcutorture/configs/rcuscale/CFcommon b/tools/testing/selftests/rcutorture/configs/rcuscale/CFcommon
new file mode 100644
index 000000000000..87caa0e932c7
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcuscale/CFcommon
@@ -0,0 +1,2 @@
+CONFIG_RCU_SCALE_TEST=y
+CONFIG_PRINTK_TIME=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcuscale/TINY b/tools/testing/selftests/rcutorture/configs/rcuscale/TINY
new file mode 100644
index 000000000000..fb05ef5279b4
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcuscale/TINY
@@ -0,0 +1,16 @@
+CONFIG_SMP=n
+CONFIG_PREEMPT_NONE=y
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=n
+#CHECK#CONFIG_TINY_RCU=y
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=y
+CONFIG_NO_HZ_FULL=n
+CONFIG_RCU_FAST_NO_HZ=n
+CONFIG_RCU_NOCB_CPU=n
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_PROVE_LOCKING=n
+CONFIG_RCU_BOOST=n
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+CONFIG_RCU_EXPERT=y
+CONFIG_RCU_TRACE=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcuscale/TREE b/tools/testing/selftests/rcutorture/configs/rcuscale/TREE
new file mode 100644
index 000000000000..721cfda76ab2
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcuscale/TREE
@@ -0,0 +1,19 @@
+CONFIG_SMP=y
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
+#CHECK#CONFIG_PREEMPT_RCU=y
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=y
+CONFIG_NO_HZ_FULL=n
+CONFIG_RCU_FAST_NO_HZ=n
+CONFIG_HOTPLUG_CPU=n
+CONFIG_SUSPEND=n
+CONFIG_HIBERNATION=n
+CONFIG_RCU_NOCB_CPU=n
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_PROVE_LOCKING=n
+CONFIG_RCU_BOOST=n
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+CONFIG_RCU_EXPERT=y
+CONFIG_RCU_TRACE=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcuscale/TREE54 b/tools/testing/selftests/rcutorture/configs/rcuscale/TREE54
new file mode 100644
index 000000000000..7629f5dd73b2
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcuscale/TREE54
@@ -0,0 +1,22 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=54
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
+#CHECK#CONFIG_PREEMPT_RCU=y
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=y
+CONFIG_NO_HZ_FULL=n
+CONFIG_RCU_FAST_NO_HZ=n
+CONFIG_HOTPLUG_CPU=n
+CONFIG_SUSPEND=n
+CONFIG_HIBERNATION=n
+CONFIG_RCU_FANOUT=3
+CONFIG_RCU_FANOUT_LEAF=2
+CONFIG_RCU_NOCB_CPU=n
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_PROVE_LOCKING=n
+CONFIG_RCU_BOOST=n
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+CONFIG_RCU_EXPERT=y
+CONFIG_RCU_TRACE=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcuscale/ver_functions.sh b/tools/testing/selftests/rcutorture/configs/rcuscale/ver_functions.sh
new file mode 100644
index 000000000000..0333e9b18522
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcuscale/ver_functions.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Torture-suite-dependent shell functions for the rest of the scripts.
+#
+# Copyright (C) IBM Corporation, 2015
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+# per_version_boot_params bootparam-string config-file seconds
+#
+# Adds per-version torture-module parameters to kernels supporting them.
+per_version_boot_params () {
+	echo $1 rcuscale.shutdown=1 \
+		rcuscale.verbose=1
+}
-- 
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