Comment 164 for bug 595047

And some test results with clocksource=jiffies instead of hpet (non-direct only), which runs much better on my machine. The total times are added in an interval of 10s. The 15s with ext3 above should come from the two cores.

ext3
total: W: 0.018617 / D: total: 3.714917 / T: total: 3.733534
requests: 4050.191168/s
W: avg: 0.000000459 / min: 0.000000000 / max: 0.000048408
D: avg: 0.000091496 / min: 0.000000000 / max: 0.615268038
T: avg: 0.000091954 / min: 0.000000000 / max: 0.615268379
4294967296 Bytes (4,3 GB) kopiert, 213,215 s, 20,1 MB/s
4294967296 Bytes (4,3 GB) kopiert, 222,198 s, 19,3 MB/s

ext4
total: W: 0.026263 / D: 3.681891 / T: 3.708154
requests: 6006.413044/s
W: avg: 0.000000431 / min: 0.000000000 / max: 0.001003075
D: avg: 0.000060427 / min: 0.000000000 / max: 0.344179020
T: avg: 0.000060858 / min: 0.000000000 / max: 0.344179370
4294967296 Bytes (4,3 GB) kopiert, 147,343 s, 29,1 MB/s
4294967296 Bytes (4,3 GB) kopiert, 146,386 s, 29,3 MB/s