[Bug 197516] TRIM on gmirror is slow and results in inresponsive system
bugzilla-noreply at freebsd.org
bugzilla-noreply at freebsd.org
Fri Feb 13 14:02:14 UTC 2015
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=197516
Robert Schulze <rs at bytecamp.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
URL| |https://forums.freebsd.org/
| |threads/bonnie-causes-ssd-b
| |acked-gmirror-to-freeze-hig
| |h-i-o-busy-with-no-throughp
| |ut.50272/
--- Comment #3 from Robert Schulze <rs at bytecamp.net> ---
One more thing to add: the behaviour of the delete calls varies extremely. I
subsequently created and deleted a 1G file and the whole delete procedure
(monitored via iostat) took 32, 14, 10, 80 seconds to complete.
I've disabled everything except syslog and ssh.
Here is the script:
--- 8< ----------------------------------------------
#!/bin/sh
FSZ=1000
FILE=/usr/${FSZ}M
echo "creating ${FSZ}M file $FILE..."
dd if=/dev/random of=$FILE bs=1k count=${FSZ}k
sync
echo "done, hit enter to delete file..."
read noop
echo "deleting file..."
unlink $FILE
sync
echo "done"
echo "running iostat -w1 ada0 ada1"
iostat -w1 ada0 ada1
--- 8< ----------------------------------------------
And the results:
1) 00:32.231
tty ada0 ada1 cpu
tin tout KB/t tps MB/s KB/t tps MB/s us ni sy in id
1 115 52.20 591 30.13 52.13 592 30.15 0 0 8 0 91
0 343 32.00 4040 126.24 32.00 4033 126.04 0 0 22 0 78
0 223 32.00 1791 55.98 32.00 1796 56.12 0 0 24 0 76
0 203 32.00 1567 48.98 32.00 1567 48.95 0 0 19 0 81
0 184 32.00 4414 137.94 32.00 4426 138.30 0 0 21 0 79
0 333 32.00 2098 65.57 32.00 2092 65.36 0 0 24 0 75
0 168 32.00 1556 48.61 32.00 1567 48.96 0 0 24 0 76
0 177 32.00 1311 40.98 32.00 1310 40.95 0 0 24 0 76
0 191 32.00 1153 36.04 32.00 1150 35.95 0 0 23 0 77
0 182 32.00 1052 32.88 32.00 1040 32.51 0 0 21 0 78
0 178 32.00 944 29.51 32.00 971 30.33 0 0 24 0 76
0 181 32.00 889 27.78 32.00 882 27.57 0 0 23 0 77
0 179 32.00 811 25.34 32.00 829 25.90 0 0 24 0 76
0 189 32.00 778 24.33 32.00 755 23.58 0 0 24 0 76
0 191 32.00 640 19.99 32.00 624 19.49 0 0 23 0 77
0 164 32.00 469 14.67 32.00 470 14.70 0 0 21 0 79
0 177 32.00 500 15.61 32.00 596 18.64 0 0 22 0 77
0 175 32.00 605 18.90 32.00 572 17.87 0 0 24 0 76
0 183 32.00 565 17.65 32.00 523 16.35 0 0 23 0 77
0 186 32.00 701 21.92 32.00 729 22.77 0 0 23 0 77
0 189 32.00 445 13.91 32.00 491 15.35 0 0 24 0 76
0 177 32.00 467 14.58 32.00 403 12.61 0 0 24 0 76
0 313 32.00 385 12.02 32.00 437 13.65 0 0 24 0 76
0 181 32.00 419 13.11 32.00 351 10.96 0 0 24 0 76
0 175 32.00 366 11.44 32.00 361 11.29 0 0 23 0 77
0 180 32.00 300 9.39 32.00 387 12.10 0 0 25 0 75
0 187 32.00 363 11.34 32.00 285 8.91 0 0 22 0 78
0 178 32.00 310 9.67 32.00 307 9.58 0 0 24 0 76
0 191 32.00 260 8.14 32.00 320 9.99 0 0 24 0 76
0 177 32.00 319 9.96 32.00 254 7.93 0 0 18 0 82
0 194 31.95 1134 35.38 31.95 1125 35.11 0 0 17 0 83
0 210 0.00 0 0.00 0.00 0 0.00 0 0 0 0 100
0 197 0.00 0 0.00 4.00 2 0.01 0 0 0 0 100
0 93 0.00 0 0.00 0.00 0 0.00 0 0 0 0 100
0 94 0.00 0 0.00 0.00 0 0.00 0 0 0 0 100
2) 00:14.720
tty ada0 ada1 cpu
tin tout KB/t tps MB/s KB/t tps MB/s us ni sy in id
1 113 52.12 564 28.69 52.06 565 28.71 0 0 8 0 92
0 340 32.00 4035 126.11 32.00 4035 126.11 0 0 23 0 77
0 227 32.00 1867 58.36 32.00 1868 58.38 0 0 23 0 77
0 200 32.00 1602 50.05 32.00 1600 49.99 0 0 19 0 81
0 238 31.99 4647 145.16 31.99 4629 144.60 0 0 22 0 78
0 215 32.00 2156 67.38 32.00 2187 68.35 0 0 25 0 75
0 193 32.00 1618 50.56 32.00 1687 52.71 0 0 24 0 76
0 195 32.00 1305 40.79 32.00 1401 43.77 0 0 25 0 75
0 193 32.00 1194 37.33 32.00 1178 36.80 0 0 25 0 75
0 156 32.00 1180 36.86 32.00 1035 32.34 0 0 22 0 77
0 193 32.00 5468 170.89 32.00 5085 158.89 0 0 21 0 78
0 203 32.00 3108 97.14 32.00 3496 109.24 0 0 23 0 76
0 206 32.00 1798 56.19 32.00 1797 56.16 0 0 21 0 78
0 175 32.00 768 23.99 32.00 767 23.96 0 0 7 0 92
0 165 0.00 0 0.00 0.00 0 0.00 0 0 0 0 100
0 71 0.00 0 0.00 0.00 0 0.00 0 0 0 0 100
0 58 0.00 0 0.00 0.00 0 0.00 0 0 0 0 100
3) 00:10.303
tty ada0 ada1 cpu
tin tout KB/t tps MB/s KB/t tps MB/s us ni sy in id
1 111 52.06 560 28.46 52.00 561 28.47 0 0 8 0 92
0 328 32.00 10263 320.71 32.00 10138 316.80 0 0 27 0 73
0 232 32.00 3957 123.65 32.00 3881 121.27 0 0 26 0 74
0 161 32.00 3015 94.21 32.00 2946 92.06 0 0 25 0 75
0 157 32.00 2593 81.02 32.00 2531 79.09 0 0 26 0 74
0 156 32.00 3482 108.82 32.00 3558 111.19 0 0 22 0 78
0 159 32.00 2002 62.57 32.00 1923 60.09 0 0 26 0 74
0 148 32.00 1780 55.62 32.00 1935 60.47 0 0 22 0 78
0 181 32.00 1985 62.03 32.00 2152 67.26 0 0 19 0 81
0 181 32.00 1898 59.33 32.00 1899 59.36 0 0 9 0 91
0 183 0.00 0 0.00 0.00 0 0.00 0 0 0 0 100
0 168 0.00 0 0.00 0.00 0 0.00 0 0 0 0 100
0 58 0.00 0 0.00 0.00 0 0.00 0 0 0 0 100
4) 01:20.279
tty ada0 ada1 cpu
tin tout KB/t tps MB/s KB/t tps MB/s us ni sy in id
1 110 52.00 562 28.52 51.94 563 28.54 0 0 8 0 92
0 350 32.00 4955 154.83 32.00 5004 156.39 0 0 27 0 73
0 218 32.00 1917 59.92 32.00 1934 60.45 0 0 26 0 74
0 160 32.00 1483 46.35 32.00 1477 46.14 0 0 25 0 75
0 156 32.00 1226 38.32 32.00 1269 39.67 0 0 24 0 76
0 137 32.00 1104 34.51 32.00 1097 34.28 0 0 25 0 75
0 139 32.00 998 31.19 32.00 994 31.07 0 0 26 0 74
0 138 32.00 908 28.37 32.00 920 28.75 0 0 26 0 74
0 153 32.00 832 25.99 32.00 858 26.81 0 0 25 0 75
0 153 32.00 773 24.17 32.00 786 24.55 0 0 24 0 76
0 142 32.00 721 22.54 32.00 737 23.05 0 0 25 0 75
0 161 32.00 679 21.22 32.00 670 20.95 0 0 25 0 75
0 156 32.00 646 20.20 32.00 608 18.99 0 0 26 0 74
0 183 32.00 584 18.26 32.00 565 17.65 0 0 25 0 75
0 190 32.00 551 17.23 32.00 528 16.51 0 0 26 0 74
0 167 32.00 500 15.63 32.00 496 15.50 0 0 25 0 75
0 173 32.00 460 14.37 32.00 468 14.64 0 0 24 0 76
0 169 32.00 423 13.22 32.00 444 13.87 0 0 24 0 76
0 168 32.00 393 12.29 32.00 413 12.91 0 0 25 0 75
0 172 32.00 379 11.85 32.00 375 11.73 0 0 25 0 75
0 168 32.00 341 10.67 32.00 364 11.37 0 0 26 0 74
0 149 32.00 348 10.88 32.00 318 9.94 0 0 25 0 75
0 280 32.00 303 9.47 32.00 325 10.17 0 0 25 0 75
0 169 32.00 298 9.32 32.00 297 9.29 0 0 24 0 76
0 171 32.00 290 9.05 32.00 271 8.47 0 0 25 0 75
0 177 32.00 269 8.41 32.00 263 8.23 0 0 25 0 75
0 176 32.00 246 7.67 32.00 230 7.20 0 0 25 0 75
0 179 32.00 188 5.88 32.00 191 5.97 0 0 25 0 75
0 175 32.00 185 5.79 32.00 194 6.06 0 0 25 0 75
0 201 31.98 1368 42.72 31.98 1429 44.63 0 0 23 0 77
0 190 32.00 198 6.17 32.00 257 8.03 0 0 26 0 74
0 172 32.00 159 4.97 32.00 233 7.28 0 0 26 0 74
0 170 32.00 151 4.73 32.00 229 7.17 0 0 25 0 75
0 181 32.00 143 4.47 31.88 227 7.06 0 0 26 0 74
0 196 32.00 132 4.14 32.00 228 7.11 0 0 25 0 75
0 133 32.00 125 3.92 32.00 225 7.05 0 0 25 0 75
0 168 32.00 123 3.85 32.00 220 6.88 0 0 25 0 75
0 184 32.00 113 3.53 32.00 221 6.91 0 0 25 0 75
0 188 32.00 116 3.62 32.00 214 6.67 0 0 23 0 77
0 214 31.85 180 5.59 32.00 145 4.53 0 0 24 0 76
0 190 32.00 183 5.70 32.00 135 4.20 0 0 24 0 76
0 161 32.00 182 5.67 32.00 127 3.97 0 0 23 0 77
0 175 32.00 485 15.17 32.00 185 5.78 0 0 24 0 76
0 286 32.00 279 8.73 32.00 261 8.17 0 0 23 0 77
0 173 32.00 171 5.35 32.00 179 5.59 0 0 25 0 75
0 168 32.00 167 5.23 32.00 110 3.44 0 0 24 0 76
0 173 32.00 150 4.68 32.00 123 3.84 0 0 24 0 76
0 169 32.00 152 4.75 32.00 118 3.68 0 0 23 0 77
0 177 32.00 151 4.73 32.00 112 3.51 0 0 24 0 76
0 173 32.00 154 4.81 32.00 109 3.40 0 0 24 0 76
0 171 32.00 151 4.73 32.00 105 3.29 0 0 24 0 76
0 133 32.00 151 4.73 32.00 103 3.20 0 0 24 0 76
0 151 32.00 149 4.64 32.00 101 3.15 0 0 23 0 77
0 185 32.00 132 4.12 32.00 116 3.63 0 0 24 0 76
0 181 32.00 140 4.37 32.00 107 3.35 0 0 24 0 76
0 180 32.00 138 4.30 32.00 104 3.24 0 0 23 0 77
0 183 32.00 137 4.30 32.00 104 3.24 0 0 24 0 76
0 177 32.00 120 3.75 32.00 118 3.69 0 0 24 0 76
0 144 32.00 121 3.79 32.00 115 3.59 0 0 23 0 77
0 174 32.00 123 3.84 32.00 111 3.47 0 0 24 0 76
0 58 32.00 113 3.52 32.00 120 3.76 0 0 25 0 75
0 188 32.00 114 3.57 32.00 113 3.54 0 0 24 0 75
0 292 32.00 123 3.85 32.00 103 3.20 0 0 23 0 77
0 171 32.00 113 3.53 32.00 111 3.47 0 0 25 0 75
0 291 32.00 113 3.53 32.00 109 3.41 0 0 25 0 75
0 174 32.00 87 2.73 32.00 135 4.20 0 0 26 0 74
0 164 32.00 87 2.73 32.00 133 4.15 0 0 24 0 76
0 169 32.00 100 3.12 32.00 118 3.67 0 0 24 0 76
0 172 32.00 120 3.76 32.00 94 2.94 0 0 24 0 76
0 167 32.00 122 3.80 32.00 91 2.85 0 0 20 0 80
0 163 32.00 126 3.94 32.00 87 2.71 0 0 17 0 83
0 207 32.00 124 3.89 32.00 101 3.14 0 0 18 0 82
0 224 32.00 102 3.19 32.00 102 3.19 0 0 19 0 81
0 156 32.00 102 3.20 32.00 101 3.17 0 0 18 0 82
0 60 32.00 101 3.15 32.00 101 3.15 0 0 17 0 83
0 177 32.00 160 5.00 32.00 145 4.52 0 0 21 0 79
0 213 31.90 548 17.08 31.91 563 17.55 0 0 6 0 94
0 209 0.00 0 0.00 0.00 0 0.00 0 0 0 0 100
0 193 0.00 0 0.00 0.00 0 0.00 0 0 0 0 100
Please note that this issue is also mentioned in the forums.
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