From 0a3225b1ebb3a005886866ffd48c1260a57107c8 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Sat, 16 Jul 2016 21:18:59 +0200
Subject: tests: add RSS tracking to extractloop

This obsoletes loopback-mem.bash.
---
 tests/stress_tests/extractloop.bash       | 51 ++++++++++++++++++++++---------
 tests/stress_tests/extractloop_plot_csv.m | 11 +++++++
 tests/stress_tests/loopback-mem.bash      | 45 ---------------------------
 3 files changed, 48 insertions(+), 59 deletions(-)
 create mode 100755 tests/stress_tests/extractloop_plot_csv.m
 delete mode 100755 tests/stress_tests/loopback-mem.bash

diff --git a/tests/stress_tests/extractloop.bash b/tests/stress_tests/extractloop.bash
index 1c0d4ce..09dfec8 100755
--- a/tests/stress_tests/extractloop.bash
+++ b/tests/stress_tests/extractloop.bash
@@ -17,39 +17,50 @@ MD5="$PWD/linux-3.0.md5sums"
 # Setup dirs
 cd /tmp
 wget -nv --show-progress -c https://www.kernel.org/pub/linux/kernel/v3.0/linux-3.0.tar.gz
-DIR1=$(mktemp -d /tmp/extractloop.XXX)
-DIR2=$DIR1.mnt
-mkdir $DIR2
+CRYPT=$(mktemp -d /tmp/extractloop.XXX)
+CSV=$CRYPT.csv
+MNT=$CRYPT.mnt
+mkdir $MNT
 
 # Mount
+FSPID=0
 if [ $# -eq 1 ] && [ "$1" == "-encfs" ]; then
 	echo "Testing EncFS"
-	encfs --extpass="echo test" --standard $DIR1 $DIR2 > /dev/null
+	encfs --extpass="echo test" --standard $CRYPT $MNT > /dev/null
 elif [ $# -eq 1 ] && [ "$1" == "-loopback" ]; then
 	echo "Testing go-fuse loopback"
-	loopback -l $DIR2 $DIR1 &
-	sleep 1
+	rm -f /tmp/loopback*.memprof
+	loopback -l -memprofile=/tmp/loopback $MNT $CRYPT &
+	FSPID=$(jobs -p)
 else
-	gocryptfs -q -init -extpass="echo test" -scryptn=10 $DIR1
-	gocryptfs -q -extpass="echo test" $DIR1 $DIR2
-	#gocryptfs -q -extpass="echo test" -nosyslog -memprofile /tmp/extractloop-mem $DIR1 $DIR2
+	echo "Testing gocryptfs"
+	gocryptfs -q -init -extpass="echo test" -scryptn=10 $CRYPT
+	gocryptfs -q -extpass="echo test" -nosyslog -f $CRYPT $MNT &
+	FSPID=$(jobs -p)
+	#gocryptfs -q -extpass="echo test" -nosyslog -memprofile /tmp/extractloop-mem $CRYPT $MNT
 fi
-cd $DIR2
+echo "Test dir: $CRYPT"
+# Sleep to make sure the FS is already mounted on MNT
+sleep 1
+cd $MNT
+
+ln -sTf $CSV /tmp/extractloop.csv
 
 # Cleanup trap
 # Note: gocryptfs may have already umounted itself because bash relays SIGINT
 # Just ignore fusermount errors.
-trap "cd /; fusermount -u -z $DIR2; rm -rf $DIR1 $DIR2" EXIT
+trap "cd /; fusermount -u -z $MNT; rm -rf $CRYPT $MNT" EXIT
 
 function loop {
-	# Note: In a subshell, $$ returns the PID of the *parent* shell,
-	# we need our own, which is why we have to use $BASHPID.
+	# Note: In a subshell, $$ returns the PID of the parent shell.
+	# We need our own PID, which is why we use $BASHPID.
 	mkdir $BASHPID
 	cd $BASHPID
 
 	echo "[pid $BASHPID] Starting loop"
 
 	N=1
+	RSS=0
 	while true
 	do
 		t1=$SECONDS
@@ -58,11 +69,23 @@ function loop {
 		rm -Rf linux-3.0
 		t2=$SECONDS
 		delta=$((t2-t1))
-		echo "[pid $BASHPID] Iteration $N done, $delta seconds"
+		if [ $FSPID -gt 0 ]; then
+			RSS=$(grep VmRSS /proc/$FSPID/status | tr -s ' ' | cut -f2 -d ' ')
+			echo "$N,$SECONDS,$RSS" >> $CSV
+		fi
+		echo "[pid $BASHPID] Iteration $N done, $delta seconds, RSS $RSS kiB"
 		let N=$N+1
 	done
 }
 
+function memprof {
+	while true; do
+		kill -USR1 $FSPID
+		sleep 60
+	done
+}
+
 loop &
 loop &
+#memprof &
 wait
diff --git a/tests/stress_tests/extractloop_plot_csv.m b/tests/stress_tests/extractloop_plot_csv.m
new file mode 100755
index 0000000..d6c164e
--- /dev/null
+++ b/tests/stress_tests/extractloop_plot_csv.m
@@ -0,0 +1,11 @@
+#!/usr/bin/octave
+
+r=csvread('/tmp/extractloop.csv');
+figure('Position',[100,100,1600,800]);
+plot(r(:,2), r(:,3)/1024, '-o');
+xlabel('seconds')
+ylabel('RSS MiB')
+grid on;
+drawnow;
+disp('press enter to exit');
+input('');
diff --git a/tests/stress_tests/loopback-mem.bash b/tests/stress_tests/loopback-mem.bash
deleted file mode 100755
index fa3b0e3..0000000
--- a/tests/stress_tests/loopback-mem.bash
+++ /dev/null
@@ -1,45 +0,0 @@
-#!/bin/bash
-#
-# Mount a loopback filesystem somewhere on /tmp, then run an
-# infinite loop inside that does the following:
-# 1) Extract linux-3.0.tar.gz
-# 2) Delete
-# 3) Get memory profile
-#
-# This test is good at discovering inode-related memory leaks because it creates
-# huge numbers of files.
-
-set -eu
-
-# Setup dirs
-cd /tmp
-wget -nv --show-progress -c https://www.kernel.org/pub/linux/kernel/v3.0/linux-3.0.tar.gz
-DIR1=$(mktemp -d /tmp/loopback-mem.XXX)
-DIR2=$DIR1.mnt
-mkdir $DIR2
-
-# Mount
-loopback -l -memprofile /tmp/lmem $DIR2 $DIR1 &
-LOOPBACKPID=$(jobs -p)
-sleep 1
-cd $DIR2
-
-# Cleanup trap
-trap "cd /; fusermount -u -z $DIR2; rm -rf $DIR1 $DIR2" EXIT
-
-echo "Starting loop"
-
-N=1
-while true; do
-	t1=$SECONDS
-	tar xf /tmp/linux-3.0.tar.gz
-	rm -Rf linux-3.0
-	t2=$SECONDS
-	delta=$((t2-t1))
-	rss=$(grep VmRSS /proc/$LOOPBACKPID/status)
-	echo "Iteration $N done, $delta seconds, $rss"
-	let N=$N+1
-	sleep 1
-	kill -USR1 $LOOPBACKPID
-done
-
-- 
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