Performance of Some SCSI Disks Under NetBSD
I run NetBSD on a pentium 100 machine
with an ASUS P55 TP4XE motherboard and a NCR PC200 SCSI controller. I
presently use two hard drives, a Conner 1060S and a Quantum 1080S. I've
done some benchmarking with these and found that the Conner is pretty dang
slow. I've got a Seagate Barracude to plug in soon, but I need a new SCSI
cable first.
Test One: direct disk reads
dd if=DEVICE of=/dev/null bs=16k
on the Conner produces about 4489508 bytes/sec
on the Quantum produces about 5033000 bytes/sec
Bonnie
Conner 1060S
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
140 1054 27.0 1048 3.8 938 7.8 2942 74.5 3355 16.3 62.9 3.3
140 1009 33.3 1000 3.5 703 5.7 3106 77.7 3117 15.0 59.2 3.2
Quantum 1080S
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
140 3668 96.3 3773 13.5 824 5.4 2937 72.4 4040 18.0 59.8 2.8
140 2892 98.8 3811 13.9 849 5.7 2955 72.5 4051 18.0 60.3 2.8
Woah, what WAS this test?
This is supposed to test drive overhead and latency.
Conner
11100 usec; -4 x 10^9 b/s
(odd results, consistent but odd)
Quantum
800 usec; 8 x 10^6 b/s
Iozone
Quantum
MB reclen bytes/sec written bytes/sec read
1 512 6168094 2912711
1 1024 10485760 6553599
1 2048 11650844 6168094
1 4096 13107200 5825422
1 8192 17476266 5242879
2 512 8065969 3177503
2 1024 11650844 6168094
2 2048 13981013 5667978
2 4096 14979657 5667978
2 8192 19065018 5242879
4 512 8559804 3647220
4 1024 4369066 3744914
4 2048 4766254 3813003
4 4096 4993219 3847985
4 8192 5242879 3919910
8 512 5555369 3744914
8 1024 4391941 3883614
8 2048 4510004 3647220
8 4096 4934475 3975643
8 8192 4510004 4013688
16 512 4596497 3813003
16 1024 4699500 3938313
16 2048 4450189 3883614
16 4096 4052467 4072139
16 8192 4092003 4072139
Conner
MB reclen bytes/sec written bytes/sec read
1 512 4993219 1398101
1 1024 6553600 1344328
1 2048 7489828 1310719
1 4096 7489828 1294538
1 8192 8065969 1294538
2 512 6765006 1008246
2 1024 8738133 1278751
2 2048 10485760 1248304
2 4096 11037642 1240918
2 8192 13107199 1219274
4 512 1152281 2995931
4 1024 1536375 3744914
4 2048 1576806 3355443
4 4096 1600879 3410003
4 8192 1625699 3084047
8 512 1489983 3631432
8 1024 1222829 3509877
8 2048 1224614 3466366
8 4096 1226404 3554494
8 8192 1230001 3480750
16 512 1075462 3753292
16 1024 1098704 3663147
16 2048 1097985 3631432
16 4096 1099424 3600260
16 8192 1094404 3623588