FreeBSD 12.0RC1 desperately slow

[Dennis Clarke]

I am seeing nearly 1980's type speeds :


eris# uname -a
FreeBSD eris 12.0-RC1 FreeBSD 12.0-RC1 r340470 GENERIC  powerpc
eris#

eris# /usr/bin/time -p /usr/sbin/portsnap fetch extract
.
.
.
Building new INDEX files... done.
real 4181.61
user 306.68
sys 2917.95
eris#


dmesg says :

ada0 at ata2 bus 0 scbus0 target 0 lun 0
ada0: <Hitachi HDS725050KLA360 K2ABC20A> ATA-7 SATA 1.x device
ada0: Serial Number KRVN23ZAHA5DBD
ada0: 150.000MB/s transfers (SATA 1.x, UDMA5, PIO 8192bytes)
ada0: 476940MB (976773168 512 byte sectors)

However performance in just about any trivial test is very very very
bad. Three "very" on purpose.  Better than serial interface speeds and
even better than old SCO ODT3 UNIX running with tape based swap. However
this is just like being back in mid 1980's on MFM/RLL disks :

eris# uname -a
FreeBSD eris 12.0-RC1 FreeBSD 12.0-RC1 r340470 GENERIC  powerpc
eris#
eris# /usr/bin/time -p dd if=/dev/urandom 
of=/var/tmp/root/random_8GB.dat bs=8192 count=1048576
1048576+0 records in
1048576+0 records out
8589934592 bytes transferred in 498.075845 secs (17246238 bytes/sec)
real 498.11
user 0.99
sys 260.24
eris#


A small x86 boxen machine nearby says :

titan#
titan# uname -a
FreeBSD titan 12.0-RC1 FreeBSD 12.0-RC1 r340470 GENERIC  amd64
titan# /usr/bin/time -p dd if=/dev/urandom 
of=/var/tmp/root/random_8GB.dat bs=8192 count=1048576
1048576+0 records in
1048576+0 records out
8589934592 bytes transferred in 116.799755 secs (73544115 bytes/sec)
real 116.80
user 0.40
sys 115.80
titan#


and ye old Solaris SPARC crate :

node000 $ uname -a
SunOS node000 5.10 Generic_150400-61 sun4u sparc SUNW,SPARC-Enterprise
node000 $ /usr/bin/time -p dd if=/dev/urandom of=random_8GB.dat bs=8192 
count=1048576
0+1048576 records in
0+1048576 records out

real 161.95
user 1.01
sys 159.46


Sure /dev/urandom should be fed as fast as the system can make up
numbers from whatever noise sources it has but even a trivial copy
of that 8GB file is terribly slow.

eris# /usr/bin/time -p cp -p random_8GB.dat /home/dclarke/
real 727.43
user 0.05
sys 46.81
eris#

eris# echo "8k 8589934592 727.43 / pq" | dc
11808606.45285457

So maybe 10 or 11MB/sec on the filesystem.
Would love ZFS but this is UFS here.

However I am running with kern.smp.disable=1 but that can't account for
  this mess .. could it ?

Dennis