| Hardware | |
|---|---|
| CPU | Intel Pentium 4 3GHz Hyper Threading 2nd cache 512KB |
| Memory | 1 GBytes |
| IDE controller | on board ICH5 (ATA100) |
| HDD | E-IDE(7200rpm, 8MB cache, ATA133) |
| Software | |
| diskio version | 1.0.0 |
| filesystem | ext3 |
Sending 8192 bytes requires at LEAST (assuming Mbytes = 1024*1024 which is maximum case):
According to criterion, result on yellow shows synchronous write is not being held properly.
| kernel | journal mode | command | time(microseconds) | ||
|---|---|---|---|---|---|
| average | minimum | maximum | |||
| 2.4.21-4EL | Ordered | fdatasync | 1999.6 | 1481.7 | 15019.3 |
| fsync | 1992.9 | 1485.1 | 13316.9 | ||
| odsync | 999.6 | 622.9 | 2866.0 | ||
| osync | 998.3 | 618.9 | 1624.8 | ||
| sync | 2182.5 | 1773.8 | 13420.0 | ||
| write | 16.7 | 8.6 | 36.9 | ||
| Journal | fdatasync | 1931.4 | 1398.5 | 12376.2 | |
| fsync | 1940.9 | 1437.9 | 17944.1 | ||
| odsync | 1928.8 | 1445.3 | 11803.7 | ||
| osync | 1943.6 | 1442.4 | 17322.9 | ||
| sync | 2667.2 | 2285.9 | 14470.7 | ||
| write | 252.8 | 9.4 | 75862.1 | ||
| 2.4.21-15EL | Ordered | fdatasync | 1611.1 | 1406.1 | 12169.9 |
| fsync | 1613.5 | 1403.8 | 10625.6 | ||
| odsync | 710.1 | 587.1 | 1068.1 | ||
| osync | 705.1 | 567.3 | 885.7 | ||
| sync | 1904.1 | 1698.1 | 10646.7 | ||
| write | 13.9 | 9.0 | 633.8 | ||
| Journal | fdatasync | 1426.0 | 1357.3 | 13242.5 | |
| fsync | 1428.9 | 1358.8 | 11948.9 | ||
| odsync | 1423.3 | 1358.7 | 12278.2 | ||
| osync | 1425.0 | 1356.7 | 12638.3 | ||
| sync | 2345.5 | 2195.8 | 13218.0 | ||
| write | 177.8 | 9.2 | 56355.3 | ||
| 2.6.5 | Journal | fdatasync | 5489.1 | 1110.0 | 17446.9 |
| fsync | 5610.5 | 1109.5 | 24296.4 | ||
| odsync | 4936.1 | 1108.0 | 17008.7 | ||
| osync | 4647.9 | 1110.4 | 16825.6 | ||
| sync | 2282.8 | 2034.3 | 13107.4 | ||
| write | 9.4 | 5.9 | 28.0 | ||
| 2.6.5-bk1 | Journal | fdatasync | 5316.8 | 7.7 | 52122.6 |
| fsync | 4229.5 | 7.6 | 64134.5 | ||
| odsync | 4549.0 | 2064.5 | 56366.1 | ||
| osync | 5246.8 | 2096.9 | 90962.2 | ||
| sync | 2335.8 | 2050.3 | 115195.9 | ||
| write | 9.4 | 5.8 | 18.8 | ||
| 2.6.6 | Ordered | fdatasync | 650.6 | 552.4 | 9927.0 |
| fsync | 658.4 | 552.6 | 7945.8 | ||
| odsync | 622.2 | 551.7 | 1094.9 | ||
| osync | 634.9 | 551.4 | 1099.2 | ||
| sync | 1086.5 | 956.7 | 5806.3 | ||
| write | 8.3 | 5.1 | 24.7 | ||
| Journal | fdatasync | 4297.3 | 7.5 | 69155.9 | |
| fsync | 6439.0 | 7.9 | 22397.1 | ||
| odsync | 4566.0 | 2074.8 | 19379.8 | ||
| osync | 5325.8 | 2098.3 | 19350.2 | ||
| sync | 2298.5 | 2053.8 | 11762.9 | ||
| write | 9.0 | 5.6 | 25.4 | ||
| 2.6.7 | Ordered | fdatasync | 259.4 | 156.4 | 9677.8 |
| fsync | 258.4 | 154.7 | 7425.9 | ||
| odsync | 242.7 | 154.7 | 640.6 | ||
| osync | 240.8 | 154.4 | 910.8 | ||
| sync | 576.2 | 403.9 | 11938.6 | ||
| write | 9.2 | 5.0 | 28.9 | ||
| Journal | fdatasync | 3855.9 | 7.6 | 23151.1 | |
| fsync | 4321.6 | 8.1 | 19573.6 | ||
| odsync | 4626.8 | 1290.5 | 20780.3 | ||
| osync | 4352.2 | 1316.9 | 14235.0 | ||
| sync | 1067.8 | 687.0 | 11363.4 | ||
| write | 9.7 | 6.1 | 25.3 | ||
| 2.6.8.1 | Journal | fdatasync | 4903.7 | 7.9 | 21773.9 |
| fsync | 4985.0 | 13.8 | 18425.8 | ||
| 2.6.9-rc1 | Journal | fdatasync | 5012.4 | 8.5 | 18451.9 |
| fsync | 3331.6 | 8.7 | 24501.1 | ||