On Tue, 5 Jul 2005 16:21:26 +0200, Jens Axboe <[email protected]> wrote:
># gcc -Wall -O2 -o oread oread.c
># time ./oread /dev/hda
Executive Summary
``````````````````
Comparing 'oread' with hdparm -tT on latest 2.4 vs 2.6 stable on
various x86 boxen. Performance drops for 2.6, sometimes:
2.4.31-hf1 2.6.12.2
peetoo: 26MB/s -> 20MB/s, oread similar 120GB + 80GB
silly: 22MB/s -> 8.5MB/s, oread similar 13GB
tosh: 35MB/s -> 23MB/s, oread similar 40GB 2.5"
pooh: 17MB/s -> 14MB/s, oread 30 -> 24 40GB
menace: 11.5MB/s -> 13MB/s, oread similar 6GB 2.5"
--Grant
The details, config, dmesg, etc from linked resources:
Intel SE440BX-2 with pII 400/100/512/2.0 CPU/FSB/L2/Vccp
512MB SDRAM on 440BX + PIIX4
http://scatter.mine.nu/test/linux-2.6/peetoo/
peetoo:~$ uname -r
2.4.31-hf1
peetoo:~$ time /home/share/install/oread /dev/hda
real 0m20.065s
user 0m0.010s
sys 0m0.810s
peetoo:~$ time /home/share/install/oread /dev/hdc
real 0m18.484s
user 0m0.000s
sys 0m0.800s
peetoo:~$ hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 444 MB in 2.00 seconds = 222.00 MB/sec
Timing buffered disk reads: 84 MB in 3.06 seconds = 27.45 MB/sec
peetoo:~$ hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 456 MB in 2.01 seconds = 226.87 MB/sec
Timing buffered disk reads: 76 MB in 3.00 seconds = 25.33 MB/sec
peetoo:~$ hdparm -tT /dev/hdc
/dev/hdc:
Timing cached reads: 464 MB in 2.01 seconds = 230.85 MB/sec
Timing buffered disk reads: 76 MB in 3.00 seconds = 25.33 MB/sec
peetoo:~$ hdparm -tT /dev/hdc
/dev/hdc:
Timing cached reads: 460 MB in 2.00 seconds = 230.00 MB/sec
Timing buffered disk reads: 82 MB in 3.00 seconds = 27.33 MB/sec
- - -
peetoo:~$ uname -r
2.6.12.2b
peetoo:~$ time /home/share/install/oread /dev/hda
real 0m21.428s
user 0m0.003s
sys 0m0.436s
peetoo:~$ time /home/share/install/oread /dev/hdc
real 0m17.588s
user 0m0.001s
sys 0m0.455s
peetoo:~$ cat /sys/block/hda/queue/scheduler
noop [deadline]
peetoo:~$ cat /sys/block/hdc/queue/scheduler
noop [deadline]
peetoo:~$ time /home/share/install/oread /dev/hda
real 0m21.417s
user 0m0.005s
sys 0m0.462s
peetoo:~$ time /home/share/install/oread /dev/hda
real 0m18.626s
user 0m0.006s
sys 0m0.440s
peetoo:~$ time /home/share/install/oread /dev/hdc
real 0m17.555s
user 0m0.005s
sys 0m0.422s
peetoo:~$ df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/hda3 2586348 563000 2023348 22% /
/dev/hdc3 2586348 1582716 1003632 62% /usr
/dev/hdc6 2586348 1217568 1368780 48% /usr/src
/dev/hda9 20562504 10821500 9741004 53% /home/install
/dev/hdc9 20562504 3634700 16927804 18% /home/public
/dev/hda10 41446344 39676256 1770088 96% /home/archive
deltree:/home/share 2064256 1042952 1021304 51% /home/share
peetoo:~$ hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 448 MB in 2.00 seconds = 223.81 MB/sec
Timing buffered disk reads: 62 MB in 3.07 seconds = 20.17 MB/sec
peetoo:~$ hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 472 MB in 2.01 seconds = 234.40 MB/sec
Timing buffered disk reads: 54 MB in 3.01 seconds = 17.97 MB/sec
peetoo:~$ hdparm -tT /dev/hdc
/dev/hdc:
Timing cached reads: 456 MB in 2.01 seconds = 226.56 MB/sec
Timing buffered disk reads: 62 MB in 3.08 seconds = 20.11 MB/sec
peetoo:~$ hdparm -tT /dev/hdc
o o o
EPoX EP-61LXA-M: Intel 440LX chipset with pentiumII/266
on 66MHz FSB (4 x 66) with 128MB SDRAM
http://scatter.mine.nu/test/linux-2.6/silly/
root@silly:~# uname -r
2.4.31-hf1
root@silly:~# time /home/share/install/oread /dev/hda
real 0m23.657s
user 0m0.000s
sys 0m1.300s
root@silly:~# hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 356 MB in 2.02 seconds = 176.24 MB/sec
Timing buffered disk reads: 68 MB in 3.04 seconds = 22.37 MB/sec
root@silly:~# hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 344 MB in 2.00 seconds = 172.00 MB/sec
Timing buffered disk reads: 68 MB in 3.03 seconds = 22.44 MB/sec
- - -
root@silly:~# uname -r
2.6.12.2a
root@silly:~# time /home/share/install/oread /dev/hda
real 0m23.569s
user 0m0.005s
sys 0m0.563s
root@silly:~# hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 336 MB in 2.00 seconds = 167.77 MB/sec
Timing buffered disk reads: 50 MB in 3.05 seconds = 16.37 MB/sec
root@silly:~# hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 340 MB in 2.01 seconds = 169.01 MB/sec
Timing buffered disk reads: 28 MB in 3.22 seconds = 8.70 MB/sec
root@silly:~# hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 336 MB in 2.01 seconds = 167.44 MB/sec
Timing buffered disk reads: 26 MB in 3.05 seconds = 8.52 MB/sec
root@silly:~# echo deadline > /sys/block/hda/queue/scheduler
root@silly:~# hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 336 MB in 2.01 seconds = 166.77 MB/sec
Timing buffered disk reads: 26 MB in 3.19 seconds = 8.14 MB/sec
root@silly:~#
o o o
Intel Celeron (coppermine pIII) 500MHz with 192MB SDRAM
on Intel 440BX/ZX + PIIX4E (Toshiba laptop)
http://scatter.mine.nu/test/linux-2.6/tosh/
root@tosh:~# uname -r
2.4.31-hf1
root@tosh:~# time /home/share/install/oread /dev/hda
real 0m18.079s
user 0m0.000s
sys 0m0.680s
root@tosh:~# hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 516 MB in 2.00 seconds = 258.00 MB/sec
Timing buffered disk reads: 74 MB in 3.02 seconds = 24.50 MB/sec
root@tosh:~# hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 520 MB in 2.01 seconds = 258.71 MB/sec
Timing buffered disk reads: 84 MB in 3.03 seconds = 27.72 MB/sec
- - -
root@tosh:~# uname -r
2.6.12.2a
root@tosh:~# time /home/share/install/oread /dev/hda
real 0m17.692s
user 0m0.004s
sys 0m0.319s
root@tosh:~# hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 500 MB in 2.00 seconds = 249.54 MB/sec
Timing buffered disk reads: 70 MB in 3.03 seconds = 23.11 MB/sec
root@tosh:~# echo deadline > /sys/block/hda/queue/scheduler
root@tosh:~# hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 520 MB in 2.01 seconds = 258.75 MB/sec
Timing buffered disk reads: 70 MB in 3.06 seconds = 22.88 MB/sec
o o o
Gigabyte GA-5AA Ali Aladdin V AGPset (1542/1543C) with AMD K6-2/500
on 100MHz FSB with 192MB SDRAM
http://scatter.mine.nu/test/linux-2.6/pooh/
root@pooh:~# uname -r
2.4.31-hf1
root@pooh:~# time /home/share/install/oread /dev/hda
real 0m29.786s
user 0m0.000s
sys 0m0.910s
root@pooh:~# hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 248 MB in 2.00 seconds = 124.00 MB/sec
Timing buffered disk reads: 54 MB in 3.11 seconds = 17.36 MB/sec
- - -
root@pooh:~# uname -r
2.6.12.2a
root@pooh:~# time /home/share/install/oread /dev/hda
real 0m23.566s
user 0m0.004s
sys 0m0.370s
root@pooh:~# hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 236 MB in 2.02 seconds = 117.02 MB/sec
Timing buffered disk reads: 44 MB in 3.10 seconds = 14.20 MB/sec
o o o
Gigabyte GA-586TX3: Intel 430TX chipset with AMD K6-2/400
on 66MHz FSB (6 x 66) with 64MB SDRAM
http://scatter.mine.nu/test/boxen/menace/
root@menace:~# uname -r
2.4.31-hf1
root@menace:~# time /home/share/install/oread /dev/hda
real 0m39.490s
user 0m0.010s
sys 0m1.090s
root@menace:~# time /home/share/install/oread /dev/hda
real 0m39.329s
user 0m0.010s
sys 0m1.090s
root@menace:~# hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 176 MB in 2.03 seconds = 86.70 MB/sec
Timing buffered disk reads: 36 MB in 3.14 seconds = 11.46 MB/sec
root@menace:~# hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 172 MB in 2.02 seconds = 85.15 MB/sec
Timing buffered disk reads: 36 MB in 3.13 seconds = 11.50 MB/sec
- - -
root@menace:~# uname -r
2.6.12.2a
root@menace:~# time /home/share/install/oread /dev/hda
real 0m38.861s
user 0m0.004s
sys 0m0.515s
root@menace:~# time /home/share/install/oread /dev/hda
real 0m39.391s
user 0m0.005s
sys 0m0.522s
root@menace:~# hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 172 MB in 2.01 seconds = 85.42 MB/sec
Timing buffered disk reads: 40 MB in 3.03 seconds = 13.20 MB/sec
root@menace:~# hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 168 MB in 2.04 seconds = 82.16 MB/sec
Timing buffered disk reads: 40 MB in 3.03 seconds = 13.21 MB/sec
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