Documentation: add extractloop example output

1 files changed, 294 insertions, 0 deletions

diff --git a/Documentation/extractloop.md b/Documentation/extractloop.md
new file mode 100644
index 0000000..ee8c0ae
--- /dev/null
+++ b/Documentation/extractloop.md
@@ -0,0 +1,294 @@
+# extractloop.bash results
+
+What the extractloop stress test does is (top comment in `extractloop.bash`):
+
+```
+# Mount a gocryptfs filesystem somewhere on /tmp, then run two parallel
+# infinite loops inside that do the following:
+# 1) Extract linux-3.0.tar.gz
+# 2) Verify the md5sums
+# 3) Delete, go to (1)
+#
+# This test is good at discovering inode-related memory leaks because it creates
+# huge numbers of files.
+```
+
+Memory usage stabilises at 119MiB, we do not run of fds,
+and the interation time is stable at 37 seconds. The test
+runs slower in the beginning due to xfstests running in
+parallel on the test machine.
+
+Test output (somewhat trimmed for brevity):
+
+```
+0 jakob@brikett:~/go/src/github.com/rfjakob/gocryptfs/tests/stress_tests$ date
+Sun Jan 21 19:48:34 CET 2018
+0 jakob@brikett:~/go/src/github.com/rfjakob/gocryptfs/tests/stress_tests$ gocryptfs -version
+gocryptfs v1.4.2-71-gf63ce35; go-fuse v20170619-24-g3d30ad6; 2018-01-20 go1.9.2
+0 jakob@brikett:~/go/src/github.com/rfjakob/gocryptfs/tests/stress_tests$ ./extractloop.bash 
+Testing gocryptfs
+Test dir: /tmp/extractloop.bash.yp3
+[pid 23842] Starting loop
+[pid 23843] Starting loop
+[pid 23843] Iteration 1 done, 64 seconds, RSS 126268 kiB
+[pid 23842] Iteration 1 done, 64 seconds, RSS 126268 kiB
+[pid 23842] Iteration 2 done, 61 seconds, RSS 128512 kiB
+[pid 23843] Iteration 2 done, 62 seconds, RSS 128512 kiB
+[pid 23843] Iteration 3 done, 62 seconds, RSS 135564 kiB
+[pid 23842] Iteration 3 done, 63 seconds, RSS 135564 kiB
+[pid 23843] Iteration 4 done, 61 seconds, RSS 135564 kiB
+[pid 23842] Iteration 4 done, 63 seconds, RSS 135564 kiB
+[pid 23843] Iteration 5 done, 63 seconds, RSS 148592 kiB
+[pid 23842] Iteration 5 done, 62 seconds, RSS 148592 kiB
+[pid 23843] Iteration 6 done, 61 seconds, RSS 148592 kiB
+[pid 23842] Iteration 6 done, 62 seconds, RSS 148592 kiB
+[pid 23843] Iteration 7 done, 62 seconds, RSS 148592 kiB
+[pid 23842] Iteration 7 done, 64 seconds, RSS 148592 kiB
+[pid 23843] Iteration 8 done, 64 seconds, RSS 155412 kiB
+[pid 23842] Iteration 8 done, 65 seconds, RSS 155412 kiB
+[pid 23843] Iteration 9 done, 67 seconds, RSS 155412 kiB
+[pid 23842] Iteration 9 done, 67 seconds, RSS 155412 kiB
+[pid 23843] Iteration 10 done, 66 seconds, RSS 155412 kiB
+[pid 23842] Iteration 10 done, 65 seconds, RSS 155412 kiB
+[pid 23843] Iteration 11 done, 64 seconds, RSS 155412 kiB
+[pid 23842] Iteration 11 done, 64 seconds, RSS 155412 kiB
+[pid 23843] Iteration 12 done, 62 seconds, RSS 155412 kiB
+[pid 23842] Iteration 12 done, 64 seconds, RSS 155412 kiB
+[pid 23843] Iteration 13 done, 66 seconds, RSS 155412 kiB
+[pid 23842] Iteration 13 done, 67 seconds, RSS 155412 kiB
+[pid 23843] Iteration 14 done, 63 seconds, RSS 155412 kiB
+[pid 23842] Iteration 14 done, 63 seconds, RSS 155412 kiB
+[pid 23842] Iteration 15 done, 60 seconds, RSS 161136 kiB
+[pid 23843] Iteration 15 done, 67 seconds, RSS 161136 kiB
+[pid 23842] Iteration 16 done, 63 seconds, RSS 161136 kiB
+[pid 23843] Iteration 16 done, 64 seconds, RSS 161136 kiB
+[pid 23842] Iteration 17 done, 62 seconds, RSS 161136 kiB
+[pid 23843] Iteration 17 done, 62 seconds, RSS 161136 kiB
+[pid 23843] Iteration 18 done, 61 seconds, RSS 161136 kiB
+[pid 23842] Iteration 18 done, 63 seconds, RSS 161136 kiB
+[pid 23843] Iteration 19 done, 62 seconds, RSS 161136 kiB
+[pid 23842] Iteration 19 done, 63 seconds, RSS 161136 kiB
+[pid 23842] Iteration 20 done, 64 seconds, RSS 161136 kiB
+[pid 23843] Iteration 20 done, 68 seconds, RSS 161136 kiB
+[pid 23842] Iteration 21 done, 41 seconds, RSS 161136 kiB
+[pid 23843] Iteration 21 done, 39 seconds, RSS 161136 kiB
+[pid 23842] Iteration 22 done, 36 seconds, RSS 161380 kiB
+[pid 23843] Iteration 22 done, 37 seconds, RSS 161380 kiB
+[pid 23842] Iteration 23 done, 36 seconds, RSS 161380 kiB
+[pid 23843] Iteration 23 done, 37 seconds, RSS 161380 kiB
+[pid 23842] Iteration 24 done, 36 seconds, RSS 161380 kiB
+[pid 23843] Iteration 24 done, 36 seconds, RSS 161380 kiB
+[pid 23842] Iteration 25 done, 36 seconds, RSS 161628 kiB
+[pid 23843] Iteration 25 done, 37 seconds, RSS 161628 kiB
+[pid 23842] Iteration 26 done, 36 seconds, RSS 161628 kiB
+[pid 23843] Iteration 26 done, 36 seconds, RSS 161628 kiB
+[pid 23842] Iteration 27 done, 36 seconds, RSS 141060 kiB
+[pid 23843] Iteration 27 done, 37 seconds, RSS 141060 kiB
+[pid 23842] Iteration 28 done, 36 seconds, RSS 141060 kiB
+[pid 23843] Iteration 28 done, 36 seconds, RSS 141060 kiB
+[pid 23842] Iteration 29 done, 35 seconds, RSS 141060 kiB
+[pid 23843] Iteration 29 done, 36 seconds, RSS 141060 kiB
+[pid 23842] Iteration 30 done, 36 seconds, RSS 141060 kiB
+[pid 23843] Iteration 30 done, 37 seconds, RSS 141320 kiB
+[pid 23842] Iteration 31 done, 35 seconds, RSS 141320 kiB
+[pid 23843] Iteration 31 done, 36 seconds, RSS 141320 kiB
+[pid 23842] Iteration 32 done, 36 seconds, RSS 141320 kiB
+[pid 23843] Iteration 32 done, 37 seconds, RSS 141320 kiB
+[pid 23842] Iteration 33 done, 36 seconds, RSS 141320 kiB
+[pid 23843] Iteration 33 done, 36 seconds, RSS 141320 kiB
+[pid 23842] Iteration 34 done, 35 seconds, RSS 141320 kiB
+[pid 23843] Iteration 34 done, 37 seconds, RSS 141320 kiB
+[pid 23842] Iteration 35 done, 36 seconds, RSS 141320 kiB
+[pid 23843] Iteration 35 done, 36 seconds, RSS 141320 kiB
+[pid 23842] Iteration 36 done, 35 seconds, RSS 141320 kiB
+[pid 23843] Iteration 36 done, 37 seconds, RSS 141320 kiB
+[pid 23842] Iteration 37 done, 36 seconds, RSS 141320 kiB
+[pid 23843] Iteration 37 done, 37 seconds, RSS 141320 kiB
+[pid 23842] Iteration 38 done, 36 seconds, RSS 141320 kiB
+[pid 23843] Iteration 38 done, 36 seconds, RSS 141320 kiB
+[pid 23842] Iteration 39 done, 35 seconds, RSS 129656 kiB
+[pid 23843] Iteration 39 done, 36 seconds, RSS 129656 kiB
+[pid 23842] Iteration 40 done, 36 seconds, RSS 129656 kiB
+[pid 23843] Iteration 40 done, 37 seconds, RSS 129656 kiB
+[pid 23842] Iteration 41 done, 36 seconds, RSS 129656 kiB
+[pid 23843] Iteration 41 done, 36 seconds, RSS 129656 kiB
+[pid 23842] Iteration 42 done, 36 seconds, RSS 129656 kiB
+[pid 23843] Iteration 42 done, 36 seconds, RSS 129656 kiB
+[pid 23842] Iteration 43 done, 36 seconds, RSS 129656 kiB
+[pid 23843] Iteration 43 done, 37 seconds, RSS 129656 kiB
+[pid 23842] Iteration 44 done, 36 seconds, RSS 129656 kiB
+[pid 23843] Iteration 44 done, 36 seconds, RSS 129656 kiB
+[pid 23842] Iteration 45 done, 36 seconds, RSS 129656 kiB
+[pid 23843] Iteration 45 done, 36 seconds, RSS 129656 kiB
+[pid 23842] Iteration 46 done, 36 seconds, RSS 129656 kiB
+[pid 23843] Iteration 46 done, 36 seconds, RSS 129656 kiB
+[pid 23842] Iteration 47 done, 36 seconds, RSS 129656 kiB
+[pid 23843] Iteration 47 done, 37 seconds, RSS 126576 kiB
+[pid 23842] Iteration 48 done, 36 seconds, RSS 126576 kiB
+[pid 23843] Iteration 48 done, 36 seconds, RSS 126820 kiB
+[pid 23842] Iteration 49 done, 36 seconds, RSS 126820 kiB
+[pid 23843] Iteration 49 done, 36 seconds, RSS 126820 kiB
+[pid 23842] Iteration 50 done, 37 seconds, RSS 126820 kiB
+[pid 23843] Iteration 50 done, 37 seconds, RSS 126820 kiB
+[pid 23842] Iteration 51 done, 36 seconds, RSS 126820 kiB
+[pid 23843] Iteration 51 done, 36 seconds, RSS 124156 kiB
+[pid 23842] Iteration 52 done, 36 seconds, RSS 124156 kiB
+[pid 23843] Iteration 52 done, 36 seconds, RSS 124156 kiB
+[pid 23842] Iteration 53 done, 36 seconds, RSS 124156 kiB
+[pid 23843] Iteration 53 done, 37 seconds, RSS 124156 kiB
+[pid 23842] Iteration 54 done, 37 seconds, RSS 124156 kiB
+[pid 23843] Iteration 54 done, 36 seconds, RSS 124156 kiB
+[pid 23842] Iteration 55 done, 36 seconds, RSS 124156 kiB
+[pid 23843] Iteration 55 done, 36 seconds, RSS 124156 kiB
+[pid 23842] Iteration 56 done, 36 seconds, RSS 122004 kiB
+[pid 23843] Iteration 56 done, 37 seconds, RSS 122004 kiB
+[pid 23842] Iteration 57 done, 36 seconds, RSS 122004 kiB
+[pid 23843] Iteration 57 done, 36 seconds, RSS 122004 kiB
+[pid 23842] Iteration 58 done, 36 seconds, RSS 122004 kiB
+[pid 23843] Iteration 58 done, 36 seconds, RSS 122004 kiB
+[pid 23842] Iteration 59 done, 36 seconds, RSS 122004 kiB
+[pid 23843] Iteration 59 done, 37 seconds, RSS 122004 kiB
+[pid 23842] Iteration 60 done, 36 seconds, RSS 120636 kiB
+[pid 23843] Iteration 60 done, 36 seconds, RSS 120636 kiB
+[pid 23842] Iteration 61 done, 37 seconds, RSS 120636 kiB
+[pid 23843] Iteration 61 done, 36 seconds, RSS 120636 kiB
+[pid 23842] Iteration 62 done, 36 seconds, RSS 120636 kiB
+[pid 23843] Iteration 62 done, 36 seconds, RSS 120636 kiB
+[pid 23842] Iteration 63 done, 36 seconds, RSS 120636 kiB
+[pid 23843] Iteration 63 done, 36 seconds, RSS 120636 kiB
+[pid 23842] Iteration 64 done, 37 seconds, RSS 120116 kiB
+[pid 23843] Iteration 64 done, 37 seconds, RSS 120116 kiB
+[pid 23842] Iteration 65 done, 36 seconds, RSS 120116 kiB
+[pid 23843] Iteration 65 done, 36 seconds, RSS 120116 kiB
+[pid 23842] Iteration 66 done, 36 seconds, RSS 120116 kiB
+[pid 23843] Iteration 66 done, 36 seconds, RSS 120116 kiB
+[pid 23842] Iteration 67 done, 36 seconds, RSS 120116 kiB
+[pid 23843] Iteration 67 done, 36 seconds, RSS 120116 kiB
+[pid 23842] Iteration 68 done, 37 seconds, RSS 120100 kiB
+[pid 23843] Iteration 68 done, 36 seconds, RSS 120100 kiB
+[pid 23842] Iteration 69 done, 36 seconds, RSS 120100 kiB
+[pid 23843] Iteration 69 done, 36 seconds, RSS 120100 kiB
+[pid 23842] Iteration 70 done, 36 seconds, RSS 120100 kiB
+[pid 23843] Iteration 70 done, 37 seconds, RSS 120100 kiB
+[pid 23842] Iteration 71 done, 36 seconds, RSS 120100 kiB
+[pid 23843] Iteration 71 done, 36 seconds, RSS 120100 kiB
+[pid 23842] Iteration 72 done, 37 seconds, RSS 120100 kiB
+[pid 23843] Iteration 72 done, 36 seconds, RSS 118964 kiB
+[pid 23842] Iteration 73 done, 36 seconds, RSS 118964 kiB
+[pid 23843] Iteration 73 done, 37 seconds, RSS 118964 kiB
+[pid 23842] Iteration 74 done, 36 seconds, RSS 118964 kiB
+[pid 23843] Iteration 74 done, 36 seconds, RSS 118964 kiB
+[pid 23842] Iteration 75 done, 36 seconds, RSS 118964 kiB
+[pid 23843] Iteration 75 done, 36 seconds, RSS 118964 kiB
+[pid 23842] Iteration 76 done, 36 seconds, RSS 118964 kiB
+[pid 23843] Iteration 76 done, 36 seconds, RSS 118956 kiB
+[pid 23842] Iteration 77 done, 36 seconds, RSS 118956 kiB
+[pid 23843] Iteration 77 done, 37 seconds, RSS 118956 kiB
+[pid 23842] Iteration 78 done, 37 seconds, RSS 118956 kiB
+[pid 23843] Iteration 78 done, 36 seconds, RSS 118956 kiB
+[pid 23842] Iteration 79 done, 36 seconds, RSS 118956 kiB
+[pid 23843] Iteration 79 done, 36 seconds, RSS 118956 kiB
+[pid 23842] Iteration 80 done, 36 seconds, RSS 118956 kiB
+[pid 23843] Iteration 80 done, 37 seconds, RSS 118812 kiB
+[pid 23842] Iteration 81 done, 36 seconds, RSS 118812 kiB
+[pid 23843] Iteration 81 done, 36 seconds, RSS 118812 kiB
+[pid 23842] Iteration 82 done, 37 seconds, RSS 118812 kiB
+[pid 23843] Iteration 82 done, 36 seconds, RSS 118812 kiB
+[pid 23842] Iteration 83 done, 36 seconds, RSS 118812 kiB
+[pid 23843] Iteration 83 done, 36 seconds, RSS 119068 kiB
+[pid 23842] Iteration 84 done, 36 seconds, RSS 119068 kiB
+[pid 23843] Iteration 84 done, 37 seconds, RSS 119044 kiB
+[pid 23842] Iteration 85 done, 37 seconds, RSS 119044 kiB
+[pid 23843] Iteration 85 done, 36 seconds, RSS 119044 kiB
+[pid 23842] Iteration 86 done, 36 seconds, RSS 119044 kiB
+[pid 23843] Iteration 86 done, 36 seconds, RSS 119044 kiB
+[pid 23842] Iteration 87 done, 36 seconds, RSS 119044 kiB
+[pid 23843] Iteration 87 done, 36 seconds, RSS 119044 kiB
+[pid 23842] Iteration 88 done, 36 seconds, RSS 119044 kiB
+[pid 23843] Iteration 88 done, 37 seconds, RSS 119044 kiB
+[pid 23842] Iteration 89 done, 37 seconds, RSS 119012 kiB
+[pid 23843] Iteration 89 done, 36 seconds, RSS 119012 kiB
+[pid 23842] Iteration 90 done, 36 seconds, RSS 119788 kiB
+[pid 23843] Iteration 90 done, 36 seconds, RSS 119788 kiB
+[pid 23842] Iteration 91 done, 36 seconds, RSS 119788 kiB
+[pid 23843] Iteration 91 done, 36 seconds, RSS 119788 kiB
+[pid 23842] Iteration 92 done, 36 seconds, RSS 119788 kiB
+[pid 23843] Iteration 92 done, 36 seconds, RSS 119788 kiB
+[pid 23842] Iteration 93 done, 36 seconds, RSS 119788 kiB
+[pid 23843] Iteration 93 done, 37 seconds, RSS 119788 kiB
+[pid 23842] Iteration 94 done, 37 seconds, RSS 119788 kiB
+[pid 23843] Iteration 94 done, 36 seconds, RSS 119788 kiB
+[pid 23842] Iteration 95 done, 36 seconds, RSS 119788 kiB
+[pid 23843] Iteration 95 done, 36 seconds, RSS 119788 kiB
+[pid 23842] Iteration 96 done, 36 seconds, RSS 119788 kiB
+[pid 23843] Iteration 96 done, 36 seconds, RSS 120052 kiB
+[pid 23842] Iteration 97 done, 37 seconds, RSS 120052 kiB
+[pid 23843] Iteration 97 done, 37 seconds, RSS 120052 kiB
+[pid 23842] Iteration 98 done, 36 seconds, RSS 120052 kiB
+[pid 23843] Iteration 98 done, 36 seconds, RSS 120052 kiB
+[pid 23842] Iteration 99 done, 36 seconds, RSS 120052 kiB
+[pid 23843] Iteration 99 done, 36 seconds, RSS 120052 kiB
+[pid 23842] Iteration 100 done, 36 seconds, RSS 120052 kiB
+[pid 23843] Iteration 100 done, 36 seconds, RSS 120052 kiB
+[pid 23842] Iteration 101 done, 36 seconds, RSS 120052 kiB
+[pid 23843] Iteration 101 done, 36 seconds, RSS 120036 kiB
+[pid 23842] Iteration 102 done, 37 seconds, RSS 120036 kiB
+[pid 23843] Iteration 102 done, 37 seconds, RSS 120036 kiB
+[pid 23842] Iteration 103 done, 36 seconds, RSS 120036 kiB
+[pid 23843] Iteration 103 done, 36 seconds, RSS 120036 kiB
+[pid 23842] Iteration 104 done, 37 seconds, RSS 120036 kiB
+[pid 23843] Iteration 104 done, 36 seconds, RSS 120036 kiB
+[pid 23842] Iteration 105 done, 36 seconds, RSS 120036 kiB
+[pid 23843] Iteration 105 done, 36 seconds, RSS 119420 kiB
+[pid 23842] Iteration 106 done, 36 seconds, RSS 119420 kiB
+[pid 23843] Iteration 106 done, 36 seconds, RSS 119420 kiB
+[pid 23842] Iteration 107 done, 36 seconds, RSS 119420 kiB
+[pid 23843] Iteration 107 done, 37 seconds, RSS 119420 kiB
+[pid 23842] Iteration 108 done, 37 seconds, RSS 119420 kiB
+[pid 23843] Iteration 108 done, 36 seconds, RSS 119420 kiB
+[pid 23842] Iteration 109 done, 36 seconds, RSS 119420 kiB
+[pid 23843] Iteration 109 done, 36 seconds, RSS 119420 kiB
+[pid 23842] Iteration 110 done, 36 seconds, RSS 119420 kiB
+[pid 23843] Iteration 110 done, 37 seconds, RSS 119420 kiB
+[pid 23842] Iteration 111 done, 36 seconds, RSS 119420 kiB
+[pid 23843] Iteration 111 done, 36 seconds, RSS 119420 kiB
+[pid 23842] Iteration 112 done, 36 seconds, RSS 119420 kiB
+[pid 23843] Iteration 112 done, 36 seconds, RSS 119420 kiB
+[pid 23842] Iteration 113 done, 37 seconds, RSS 119420 kiB
+[pid 23843] Iteration 113 done, 37 seconds, RSS 119420 kiB
+[pid 23842] Iteration 114 done, 36 seconds, RSS 119420 kiB
+[pid 23843] Iteration 114 done, 36 seconds, RSS 119420 kiB
+[pid 23842] Iteration 115 done, 36 seconds, RSS 119420 kiB
+[pid 23843] Iteration 115 done, 36 seconds, RSS 119420 kiB
+[pid 23842] Iteration 116 done, 37 seconds, RSS 119420 kiB
+[pid 23843] Iteration 116 done, 36 seconds, RSS 119420 kiB
+[pid 23842] Iteration 117 done, 36 seconds, RSS 119420 kiB
+[pid 23843] Iteration 117 done, 37 seconds, RSS 119420 kiB
+[pid 23842] Iteration 118 done, 36 seconds, RSS 119420 kiB
+[pid 23843] Iteration 118 done, 36 seconds, RSS 119420 kiB
+[pid 23842] Iteration 119 done, 36 seconds, RSS 119420 kiB
+[pid 23843] Iteration 119 done, 36 seconds, RSS 119420 kiB
+[pid 23842] Iteration 120 done, 36 seconds, RSS 119420 kiB
+[pid 23843] Iteration 120 done, 36 seconds, RSS 119668 kiB
+[pid 23842] Iteration 121 done, 37 seconds, RSS 119668 kiB
+[pid 23843] Iteration 121 done, 37 seconds, RSS 119668 kiB
+[pid 23842] Iteration 122 done, 36 seconds, RSS 119668 kiB
+[...]
+[pid 23842] Iteration 1988 done, 36 seconds, RSS 119880 kiB
+[pid 23843] Iteration 1988 done, 37 seconds, RSS 119880 kiB
+[pid 23842] Iteration 1989 done, 36 seconds, RSS 119880 kiB
+[pid 23843] Iteration 1989 done, 36 seconds, RSS 119880 kiB
+[pid 23842] Iteration 1990 done, 36 seconds, RSS 119880 kiB
+[pid 23843] Iteration 1990 done, 36 seconds, RSS 119880 kiB
+[pid 23842] Iteration 1991 done, 36 seconds, RSS 119880 kiB
+[pid 23843] Iteration 1991 done, 36 seconds, RSS 119880 kiB
+[pid 23842] Iteration 1992 done, 37 seconds, RSS 119728 kiB
+[pid 23843] Iteration 1992 done, 36 seconds, RSS 119728 kiB
+[pid 23842] Iteration 1993 done, 36 seconds, RSS 119728 kiB
+[pid 23843] Iteration 1993 done, 37 seconds, RSS 119728 kiB
+[pid 23842] Iteration 1994 done, 36 seconds, RSS 119728 kiB
+[pid 23843] Iteration 1994 done, 37 seconds, RSS 119728 kiB
+^C2018/01/21 12:00:43 Unimplemented opcode INTERRUPT
+
+130 jakob@brikett:~/go/src/github.com/rfjakob/gocryptfs/tests/stress_tests$
+```