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Subject: [Bug 216759] [kern] Memory speed significantly slower under QEMUKVM
 emulation according to sysbench
Date: Sat, 04 Feb 2017 18:13:24 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D216759

--- Comment #2 from andrew@azar-a.net ---
(In reply to andrew from comment #1)
# dd if=3D/root/test of=3D/dev/md1 bs=3D512
262144+0 records in
262144+0 records out
134217728 bytes transferred in 4.829553 secs (27790924 bytes/sec

# dd if=3D/root/test of=3D/dev/md1 bs=3D1K
131072+0 records in
131072+0 records out
134217728 bytes transferred in 2.478277 secs (54157674 bytes/sec)

Apparently the bug is only visible with anything smaller than 1M

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