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SubjectRe: Latest ext3 patches (extents, mballoc, delayed allocation)
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Good day all,

I've updated the patchset against 2.6.10. A bunch of bugs have been
fixed and mballoc now behaves smarter a bit. Extents and mballoc
patches collects some stats they print upon umount. NOTE: they must
not be used to store important data. A lot of things are to be done.

Please review. Any comments and suggestions are very welcome.

The patches are too big to send in a message (previous time they got
rejected). I put them in ftp://ftp.clusterfs.com/pub/people/alex/2.6.10

The following names are used:
ext3rs - ext3 mounted with data=writeback,reservation options
ext3i - ext3 mounted with extents,mballoc,delalloc options
reiser - reiserfs v3

I did some benchmarking. Two systems were used:
SMP - dual PIII-1GHz, 1GB, FC-connected to 2 disks raid0
UP - PIII-933MHz, 256MB, FC-connected to 2 disks raid0



The tests dd500 and dd1000 generate 500M and 1000M using dd on fresh fs.
Real time varies run from run because of disks, but sys.time is stable.

SMP UP
TEST / FS real sys real sys
dd500/ext2 - 9.14 2.33 19.03 2.50
dd500/ext3 - 12.23 4.06 18.99 4.19
dd500/ext3rs - 13.39 4.01 15.08 4.16
dd500/ext3i - 9.19 2.31 19.07 2.52
dd500/reiser - 7.95 2.87 21.23 3.09
dd500/xfs - 17.88 2.42 19.25 2.67

dd1000/ext2 - 37.47 4.69 44.59 5.02
dd1000/ext3 - 38.03 7.90 40.77 8.31
dd1000/ext3rs - 34.62 7.95 40.51 8.30
dd1000/ext3i - 33.73 4.65 38.74 4.93
dd1000/reiser - 29.29 5.79 44.88 6.08
dd1000/xfs - 37.11 5.03 39.98 5.27



The test untar unpacks linux-2.6.0.tar:

SMP UP
TEST / FS real sys real sys
untar/ext2 - 9.21 2.47 27.31 2.57
untar/ext3 - 15.63 3.38 34.54 3.61
untar/ext3rs - 15.91 3.27 35.98 3.65
untar/ext3i - 8.33 2.70 16.75 2.84
untar/reiser - 13.38 5.47 25.88 5.96
untar/xfs - 44.62 5.64 51.92 4.88



The next test is dbench:

SMP UP
TEST / FS real sys MB/s real sys MB/s
dbench1/ext2 - 5.87 1.43 63.7256 5.93 1.54 63.79
dbench1/ext3 - 2.46 1.75 139.794 3.60 1.85 131.372
dbench1/ext3rs - 2.46 1.73 140.378 3.55 1.85 133.071
dbench1/ext3i - 2.19 1.48 156.976 2.28 1.53 150.403
dbench1/reiser - 2.80 2.05 122.761 2.88 2.11 119.815
dbench1/xfs - 2.83 1.81 122.159 2.87 1.91 119.564

dbench4/ext2 - 4.99 7.13 274.216 9.96 6.22 137.316
dbench4/ext3 - 5.79 8.64 236.858 11.49 7.40 130.146
dbench4/ext3rs - 5.80 8.57 236.356 11.45 7.38 130.467
dbench4/ext3i - 5.16 7.16 265.621 9.25 6.31 147.872
dbench4/reiser - 7.11 10.85 192.491 11.85 8.59 115.392
dbench4/xfs - 6.60 8.88 207.599 11.98 7.69 114.177

dbench8/ext2 - 16.04 14.27 181.93 18.32 12.14 149.228
dbench8/ext3 - 18.87 17.04 165.214 23.77 14.88 119.995
dbench8/ext3rs - 11.52 17.21 237.647 23.35 15.04 123.088
dbench8/ext3i - 11.20 14.66 268.052 21.00 12.49 130.223
dbench8/reiser - 13.92 21.65 196.306 24.98 17.67 114.083
dbench8/xfs - 14.84 18.23 184.263 25.84 15.53 105.743

dbench16/ext2 - 20.39 28.79 267.979 47.37 25.13 115.582
dbench16/ext3 - 25.69 34.54 212.745 53.43 30.78 102.266
dbench16/ext3rs - 24.47 34.36 223.37 54.68 30.44 100.082
dbench16/ext3i - 22.94 29.40 238.215 44.89 25.73 121.962
dbench16/reiser - 28.56 43.86 191.407 56.48 36.41 96.9686
dbench16/xfs - 33.49 36.94 163.159 78.68 32.56 69.4764

dbench32/ext2 - 43.54 58.87 250.947 108.1 51.24 101.354
dbench32/ext3 - 61.83 70.66 176.707 139.84 63.77 78.8818
dbench32/ext3rs - 67.24 71.69 162.651 145.03 63.38 75.5155
dbench32/ext3i - 55.29 59.41 197.757 100.24 52.50 109.26
dbench32/reiser - 76.32 93.45 143.127 128.77 77.94 85.7179
dbench32/xfs - 119.4 88.09 91.4746 670.45 76.19 16.298



The followins crazy listing shows tiobench's results for SMP box:

Sequential Reads
File Blk Num Avg CPU
Identifier Size Size Thr Rate (CPU%) Latency Eff
---------------------------- ------ ----- --- ------ ------ --------- -----
ext2 512 4096 1 40.95 12.80% 0.095 320
ext3 512 4096 1 45.03 13.99% 0.086 322
ext3rs 512 4096 1 50.53 15.18% 0.077 333
ext3i 512 4096 1 49.69 14.53% 0.078 342
reiser 512 4096 1 29.56 12.08% 0.132 245
xfs 512 4096 1 44.58 15.25% 0.087 292
ext2 512 4096 2 22.36 13.21% 0.287 169
ext3 512 4096 2 45.94 23.48% 0.108 196
ext3rs 512 4096 2 46.29 23.57% 0.119 196
ext3i 512 4096 2 46.96 23.83% 0.111 197
reiser 512 4096 2 23.05 14.89% 0.252 155
xfs 512 4096 2 55.98 30.65% 0.064 183

ext2 512 4096 4 45.39 55.10% 0.155 82
ext3 512 4096 4 59.16 48.85% 0.103 121
ext3rs 512 4096 4 54.35 46.83% 0.215 116
ext3i 512 4096 4 65.81 55.53% 0.119 119
reiser 512 4096 4 26.35 32.38% 0.369 81
xfs 512 4096 4 71.81 66.22% 0.113 108

Random Reads
File Blk Num Avg CPU
Identifier Size Size Thr Rate (CPU%) Latency Eff
---------------------------- ------ ----- --- ------ ------ --------- -----
ext2 512 4096 1 119.05 40.37% 0.031 295
ext3 512 4096 1 134.78 37.08% 0.028 363
ext3rs 512 4096 1 25.18 8.377% 0.154 301
ext3i 512 4096 1 144.45 48.98% 0.026 295
reiser 512 4096 1 33.53 13.51% 0.115 248
xfs 512 4096 1 83.14 27.66% 0.045 301
ext2 512 4096 2 34.28 19.08% -0.290 180
ext3 512 4096 2 239.35 168.4% -0.549 142
ext3rs 512 4096 2 257.29 167.9% -0.376 153
ext3i 512 4096 2 174.08 126.9% -1.885 137
reiser 512 4096 2 45.32 25.80% -0.477 176
xfs 512 4096 2 26.27 16.80% -0.762 156

ext2 512 4096 4 138.70 173.9% -1.166 80
ext3 512 4096 4 159.41 141.7% -1.310 112
ext3rs 512 4096 4 89.80 87.91% -0.091 102
ext3i 512 4096 4 135.86 122.5% -3.192 111
reiser 512 4096 4 109.81 153.8% -0.673 71
xfs 512 4096 4 32.64 39.26% -1.949 83

Sequential Writes
File Blk Num Avg CPU
Identifier Size Size Thr Rate (CPU%) Latency Eff
---------------------------- ------ ----- --- ------ ------ --------- -----
ext2 512 4096 1 55.15 37.13% 0.030 149
ext3 512 4096 1 35.24 43.82% 0.106 80
ext3rs 512 4096 1 34.24 42.86% 0.125 80
ext3i 512 4096 1 43.54 32.07% 0.028 136
reiser 512 4096 1 51.67 84.37% 0.063 61
xfs 512 4096 1 27.32 21.85% 0.057 125
ext2 512 4096 2 18.76 34.45% 0.111 54
ext3 512 4096 2 28.82 88.31% 0.236 33
ext3rs 512 4096 2 30.63 91.98% 0.218 33
ext3i 512 4096 2 56.24 112.1% 0.018 50
reiser 512 4096 2 18.31 85.35% 0.173 21
xfs 512 4096 2 34.29 67.42% 0.213 51

ext2 512 4096 4 15.92 54.67% 0.559 29
ext3 512 4096 4 41.36 243.4% 0.137 17
ext3rs 512 4096 4 45.44 275.5% 0.197 16
ext3i 512 4096 4 55.94 208.8% 0.020 27
reiser 512 4096 4 20.47 176.9% 0.491 12
xfs 512 4096 4 53.60 207.4% 0.056 26

Random Writes
File Blk Num Avg CPU
Identifier Size Size Thr Rate (CPU%) Latency Eff
---------------------------- ------ ----- --- ------ ------ --------- -----
ext2 512 4096 1 0.73 0.565% 0.016 129
ext3 512 4096 1 1.01 0.733% 0.018 137
ext3rs 512 4096 1 1.01 0.742% 0.018 136
ext3i 512 4096 1 0.84 0.611% 0.015 137
reiser 512 4096 1 0.74 0.531% 0.114 138
xfs 512 4096 1 1.40 1.048% 0.018 134
ext2 512 4096 2 1.21 2.248% 0.021 54
ext3 512 4096 2 1.29 2.549% 0.021 51
ext3rs 512 4096 2 1.20 2.448% 0.021 49
ext3i 512 4096 2 0.74 1.572% 0.018 47
reiser 512 4096 2 1.28 2.325% 0.021 55
xfs 512 4096 2 1.08 2.056% 0.020 52

ext2 512 4096 4 1.04 3.760% 0.028 28
ext3 512 4096 4 0.76 2.758% 0.029 28
ext3rs 512 4096 4 0.80 3.052% 0.027 26
ext3i 512 4096 4 0.76 2.879% 0.024 26
reiser 512 4096 4 1.13 3.854% 0.023 29
xfs 512 4096 4 0.79 2.432% 0.025 32



thanks, Alex

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