blob: 5ea56d2eb51c1effc26c2b78a6f8da48575be6e3 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
#!/bin/bash
# Demonstrate >5X speed-up in using fts-based rm on ext4
# Demonstrate 1.5X speed-up in using fts-based rm on reiserfs
set -x
a=$(printf %031d 0)
b=$(printf %031d 1)
(mkdir $a \
&& cd $a \
&& seq --format=%031g 10000 |xargs touch \
&& seq --format=d%030g 10000 |xargs mkdir ) || framework_failure
cp -al $a $b || framework_failure
mkdir e || framework_failure
mv $a $b e || framework_failure
cp -a e 1
cp -a e 2
sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'
env time /p/bin/rm -rf 1
env time /cu/src/rm -rf 2
cp -a e 1
cp -a e 2
sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'
env time cu/src/rm -rf 2
env time /p/bin/rm -rf 1
########################################################################
# on ext4
# + env time /p/bin/rm -rf 1
# 0.19user 12.09system 0:14.42elapsed 85%CPU (0avgtext+0avgdata 0maxresident)k
# 0inputs+0outputs (0major+212minor)pagefaults 0swaps
# + env time /cu/src/rm -rf 2
# 0.13user 0.93system 0:01.08elapsed 98%CPU (0avgtext+0avgdata 0maxresident)k
# 0inputs+0outputs (0major+1235minor)pagefaults 0swaps
# + cp -a e 1
# + cp -a e 2
# + env time /cu/src/rm -rf 2
# 0.12user 0.94system 0:01.07elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
# 0inputs+0outputs (0major+1236minor)pagefaults 0swaps
# + env time /p/bin/rm -rf 1
# 0.19user 12.08system 0:12.33elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
# 0inputs+0outputs (0major+212minor)pagefaults 0swaps
# on reiserfs:
# + env time /p/bin/rm -rf 1
# 0.30user 4.16system 0:04.49elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
# 0inputs+0outputs (0major+168minor)pagefaults 0swaps
# + env time /cu/src/rm -rf 2
# 0.21user 2.47system 0:02.88elapsed 93%CPU (0avgtext+0avgdata 0maxresident)k
# 0inputs+80outputs (0major+1199minor)pagefaults 0swaps
# + cp -a e 1
# + cp -a e 2
# + env time /cu/src/rm -rf 2
# 0.19user 2.56system 0:02.76elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
# 0inputs+0outputs (0major+1200minor)pagefaults 0swaps
# + env time /p/bin/rm -rf 1
# 0.29user 4.17system 0:04.55elapsed 98%CPU (0avgtext+0avgdata 0maxresident)k
# 0inputs+0outputs (0major+168minor)pagefaults 0swaps
########################################################################
# on xfs, F11, slow-disk laptop: (shows slight improvement)
# iou$ bash /cu/src/README-rm-timing-2 :
# ++ printf %031d 0
# + a=0000000000000000000000000000000
# ++ printf %031d 1
# + b=0000000000000000000000000000001
# + mkdir 0000000000000000000000000000000
# + cd 0000000000000000000000000000000
# + xargs touch
# + seq --format=%031g 10000
# + seq --format=d%030g 10000
# + xargs mkdir
# + cp -al 0000000000000000000000000000000 0000000000000000000000000000001
# + mkdir e
# + mv 0000000000000000000000000000000 0000000000000000000000000000001 e
# + cp -a e 1
# + cp -a e 2
# + sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'
# + env time /p/bin/rm -rf 1
# 1.06user 12.10system 1:41.96elapsed 12%CPU (0avgtext+0avgdata 0maxresident)k
# 16368inputs+0outputs (1major+175minor)pagefaults 0swaps
# + env time /cu/src/rm -rf 2
# 0.57user 5.47system 1:32.69elapsed 6%CPU (0avgtext+0avgdata 0maxresident)k
# 20112inputs+0outputs (1major+1214minor)pagefaults 0swaps
# + cp -a e 1
# + cp -a e 2
# + sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'
# + env time /cu/src/rm -rf 2
# 0.54user 5.34system 1:28.43elapsed 6%CPU (0avgtext+0avgdata 0maxresident)k
# 19032inputs+0outputs (1major+1198minor)pagefaults 0swaps
# + env time /p/bin/rm -rf 1
# 0.99user 12.36system 1:37.36elapsed 13%CPU (0avgtext+0avgdata 0maxresident)k
# 20256inputs+0outputs (1major+174minor)pagefaults 0swaps
########################################################################
# on btrfs, F11, slow-disk laptop: (shows 7-8X speed-up)
# iou$ env time bash /cu/src/README-rm-timing-2 :
# ++ printf %031d 0
# + a=0000000000000000000000000000000
# ++ printf %031d 1
# + b=0000000000000000000000000000001
# + mkdir 0000000000000000000000000000000
# + cd 0000000000000000000000000000000
# + seq --format=%031g 10000
# + xargs touch
# + seq --format=d%030g 10000
# + xargs mkdir
# + cp -al 0000000000000000000000000000000 0000000000000000000000000000001
# + mkdir e
# + mv 0000000000000000000000000000000 0000000000000000000000000000001 e
# + cp -a e 1
# + cp -a e 2
# + sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'
# + env time /p/bin/rm -rf 1
# 0.51user 59.42system 1:09.73elapsed 85%CPU (0avgtext+0avgdata 0maxresident)k
# 43536inputs+82536outputs (1major+425minor)pagefaults 0swaps
# + env time /cu/src/rm -rf 2
# 0.26user 8.01system 0:08.50elapsed 97%CPU (0avgtext+0avgdata 0maxresident)k
# 808inputs+54984outputs (1major+1199minor)pagefaults 0swaps
# + cp -a e 1
# + cp -a e 2
# + sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'
# 0.26user 8.31system 0:09.17elapsed 93%CPU (0avgtext+0avgdata 0maxresident)k
# 976inputs+47744outputs (1major+1197minor)pagefaults 0swaps
# + env time /p/bin/rm -rf 1
# 0.48user 57.83system 1:04.81elapsed 89%CPU (0avgtext+0avgdata 0maxresident)k
# 27408inputs+75632outputs (1major+423minor)pagefaults 0swaps
# ---
# 5.60user 214.36system 4:14.11elapsed 86%CPU (0avgtext+0avgdata 0maxresident)k
# 131544inputs+551320outputs (83major+15945minor)pagefaults 0swaps
########################################################################
# on reiserfs, F11, slow-disk laptop: (shows ~4X speed-up)
# but notice total test time: just 51s, compared with 4:11 for btrfs above.
# iou$ env time bash /cu/src/README-rm-timing-2 :
# ++ printf %031d 0
# + a=0000000000000000000000000000000
# ++ printf %031d 1
# + b=0000000000000000000000000000001
# + mkdir 0000000000000000000000000000000
# + cd 0000000000000000000000000000000
# + seq --format=%031g 10000
# + xargs touch
# + seq --format=d%030g 10000
# + xargs mkdir
# + cp -al 0000000000000000000000000000000 0000000000000000000000000000001
# + mkdir e
# + mv 0000000000000000000000000000000 0000000000000000000000000000001 e
# + cp -a e 1
# + cp -a e 2
# + sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'
# + env time /p/bin/rm -rf 1
# 0.48user 9.79system 0:10.33elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
# 256inputs+0outputs (1major+191minor)pagefaults 0swaps
# + env time /cu/src/rm -rf 2
# 0.25user 2.15system 0:02.50elapsed 96%CPU (0avgtext+0avgdata 0maxresident)k
# 808inputs+0outputs (1major+1198minor)pagefaults 0swaps
# + cp -a e 1
# + cp -a e 2
# + sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'
# + env time /cu/src/rm -rf 2
# 0.26user 2.10system 0:02.46elapsed 95%CPU (0avgtext+0avgdata 0maxresident)k
# 808inputs+0outputs (1major+1198minor)pagefaults 0swaps
# + env time /p/bin/rm -rf 1
# 0.44user 9.89system 0:10.41elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
# 264inputs+0outputs (1major+176minor)pagefaults 0swaps
# ---
# 4.48user 42.92system 0:51.14elapsed 92%CPU (0avgtext+0avgdata 0maxresident)k
# 21680inputs+54232outputs (86major+16962minor)pagefaults 0swaps
########################################################################
# on ext2, F11, slow-disk laptop: (shows ~4X speed-up)
# iou$ env time bash /cu/src/README-rm-timing-2 :
# ++ printf %031d 0
# + a=0000000000000000000000000000000
# ++ printf %031d 1
# + b=0000000000000000000000000000001
# + mkdir 0000000000000000000000000000000
# + cd 0000000000000000000000000000000
# + seq --format=%031g 10000
# + xargs touch
# + seq --format=d%030g 10000
# + xargs mkdir
# + cp -al 0000000000000000000000000000000 0000000000000000000000000000001
# + mkdir e
# + mv 0000000000000000000000000000000 0000000000000000000000000000001 e
# + cp -a e 1
# + cp -a e 2
# + sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'
# + env time /p/bin/rm -rf 1
# 1.02user 15.25system 0:30.76elapsed 52%CPU (0avgtext+0avgdata 0maxresident)k
# 178888inputs+19144outputs (1major+423minor)pagefaults 0swaps
# + env time /cu/src/rm -rf 2
# 0.40user 2.30system 0:05.99elapsed 45%CPU (0avgtext+0avgdata 0maxresident)k
# 83088inputs+18480outputs (1major+1199minor)pagefaults 0swaps
# + cp -a e 1
# + cp -a e 2
# + sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'
# + env time /cu/src/rm -rf 2
# 0.38user 2.83system 0:08.18elapsed 39%CPU (0avgtext+0avgdata 0maxresident)k
# 85848inputs+16024outputs (1major+1199minor)pagefaults 0swaps
# + env time /p/bin/rm -rf 1
# 0.84user 15.24system 0:25.28elapsed 63%CPU (0avgtext+0avgdata 0maxresident)k
# 178656inputs+18728outputs (1major+423minor)pagefaults 0swaps
# ---
# 6.73user 263.32system 5:27.69elapsed 82%CPU (0avgtext+0avgdata 0maxresident)k
# 780296inputs+891712outputs (86major+17155minor)pagefaults 0swaps
########################################################################
# on tmpfs, F11, slow-disk laptop: (shows ~4X speed-up)
# + sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'
# + env time /p/bin/rm -rf 1
# 0.37user 2.47system 0:03.10elapsed 91%CPU (0avgtext+0avgdata 0maxresident)k
# 256inputs+0outputs (1major+175minor)pagefaults 0swaps
# + env time /cu/src/rm -rf 2
# 0.23user 0.41system 0:00.76elapsed 85%CPU (0avgtext+0avgdata 0maxresident)k
# 520inputs+0outputs (1major+2092minor)pagefaults 0swaps
# + cp -a e 1
# + cp -a e 2
# + sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'
# + env time /cu/src/rm -rf 2
# 0.24user 0.41system 0:00.73elapsed 89%CPU (0avgtext+0avgdata 0maxresident)k
# 800inputs+0outputs (1major+2090minor)pagefaults 0swaps
# + env time /p/bin/rm -rf 1
# 0.36user 2.47system 0:02.86elapsed 98%CPU (0avgtext+0avgdata 0maxresident)k
# 256inputs+0outputs (1major+175minor)pagefaults 0swaps
|
