On Wed, Aug 21, 2013 at 12:01 PM, Dongsheng Song <[email protected]> wrote:
>> 1073741824 bytes (1.1 GB) copied, 2.10386 s, 510 MB/s >> 1073741824 bytes (1.1 GB) copied, 7.08881 s, 151 MB/s >> 1073741824 bytes (1.1 GB) copied, 6.85367 s, 157 MB/s > 1073741824 bytes transferred in 34.246246 secs (31353563 bytes/sec) > 1073741824 bytes transferred in 17.962520 secs (59776793 bytes/sec) > 1073741824 bytes transferred in 50.373031 secs (21315807 bytes/sec) In other operating systems, you are seeing 3-4x variations in speed in the exact same test. Something not in that virtual installation is eating up disk time; it is hard to reach any conclusion when you are seeing such variation in your 'control' tests. It's possible that DragonFly doesn't perform as well for disk I/O in emulation, and I know there's been virtio driver work that could benefit that. But - there's something else going on.
