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OpenBSD 6.1: kernel GENERIC.MP disk speed is very slow

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OpenBSD 6.1: kernel GENERIC.MP disk speed is very slow

Hwang, Wey
disk speed in kernel GENERIC:
=====>
# dd if=/dev/rsd0a of=/dev/null bs=1m count=128
128+0 records in
128+0 records out
134217728 bytes transferred in 0.746 secs (179873607 bytes/sec)
<=====

disk speed in kernel GENERIC.MP:
=====>
# dd if=/dev/rsd0a of=/dev/null bs=1m count=128
128+0 records in
128+0 records out
134217728 bytes transferred in 5.189 secs (25864258 bytes/sec)
<=====

can anyone tell me how to fix it? thanx!

dmesg-GENERIC.txt (10K) Download Attachment
dmesg-GENERIC.MP.txt (26K) Download Attachment
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