lspci | grep AHCI
00:1f.2 SATA controller: Intel Corporation 82801JI (ICH10 Family) SATA AHCI Controller
uname -a
Linux finnix 2.6.30-1-amd64-finnix #1 SMP Tue Aug 4 22:38:20 PDT 2009 x86_64 GNU/Linux
egrep 'ata[0-9]\.' /var/log/dmesg
[ 74.991247] ata6.00: ATA-8: WDC WD6401AALS-00L3B2, 01.03B01, max UDMA/133
[ 74.991251] ata6.00: 1250263728 sectors, multi 0: LBA48 NCQ (depth 31/32)
[ 74.992193] ata6.00: configured for UDMA/133
dd if=/dev/sdb of=/dev/null bs=1M count=16000
16777216000 bytes (17 GB) copied, 145.542 s, 115 MB/s
dd if=/dev/zero of=/dev/sdb bs=1M count=16000
16777216000 bytes (17 GB) copied, 147.083 s, 114 MB/s
parted /dev/sdb mklabel msdos
parted /dev/sdb mkpart p 2048s 128g
mkfs.ext3 /dev/sdb1
mount -o noatime /dev/sdb1 /mnt
bonnie++ -d /mnt -u root -n 0
Version 1.96 ------Sequential Output------ --Sequential Input- --Random-
Concurrency 1 -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
finnix 12G 534 99 85924 14 47178 7 1948 98 113695 8 380.2 7
finnix 12G 523 99 86426 14 47244 7 1901 96 116232 9 374.6 8
cd /tmp; wget http://smp.if.uj.edu.pl/~baryluk/seeker_baryluk; chmod +x seeker_baryluk
cat /sys/block/sdb/queue/scheduler
noop anticipatory deadline [cfq]
cat /sys/block/sdb/device/queue_depth
31
for threads in 01 02 04 08 16 32; do echo -n "Threads: $threads "; ./seeker_baryluk /dev/sdb $threads | grep Results; sleep 1; done
Threads: 01 Results: 81 seeks/second, 12.336 ms random access time (103651691 < offsets < 639694498017)
Threads: 02 Results: 93 seeks/second, 10.714 ms random access time (270933140 < offsets < 639912513721)
Threads: 04 Results: 107 seeks/second, 9.308 ms random access time (900518 < offsets < 639371592671)
Threads: 08 Results: 125 seeks/second, 7.953 ms random access time (131833645 < offsets < 639993930574)
Threads: 16 Results: 147 seeks/second, 6.795 ms random access time (47481837 < offsets < 640075880405)
Threads: 32 Results: 171 seeks/second, 5.822 ms random access time (11695706 < offsets < 639914243812)
