Re: FreeBSD 5.3 I/O Performance / Linux 2.6.10 | Continued Discussion

From: Mike Tancsa (mike_at_sentex.net)
Date: 01/28/05

  • Next message: Robert Watson: "Re: FreeBSD 5.3 I/O Performance / Linux 2.6.10 | Continued Discussion" 
    Date: Fri, 28 Jan 2005 15:02:23 -0500
To: Robert Watson <rwatson@freebsd.org>

    At 04:52 AM 28/01/2005, Robert Watson wrote:

    >Just to get started, using dd to read and write at various block sizes is
    >probably a decent start. Take a few samples, make sure there's a decent
    >sample size, etc, and don't count the first couple of runs.

    I started over and installed the OS on a separate drive, so that the RAID5
    partition was one big partition. Bonnie seems fairly equal on the 2
    platforms. I am just putting together all the IOZONE tests as well which I
    will post later tonight / over the weekend.

                   -------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
    F 2000 33789 25.8 34065 8.3 14038 3.8 47484 44.6 67316 9.5
    2873.7 5.7
    L 2000 28073 62.0 22391 4.3 12189 2.0 17577 35.5 102132 5.5
    1853.7 2.5

    F=RELENG_5
    L=2.6.10 LINUX

    However, on the postmark tests, there seems to be quite a bit more difference.

    RELENG_5 #2
    [nfs]# time dd if=/dev/zero of=/mnt/test bs=16k count=2000
    32768000 bytes transferred in 0.724865 secs (45205661 bytes/sec)
    0.000u 0.066s 0:00.73 8.2% 33+281k 0+250io 0pf+0w
    [nfs]# time dd if=/dev/zero of=/mnt/test bs=32k count=2000
    65536000 bytes transferred in 1.731888 secs (37840788 bytes/sec)
    0.000u 0.122s 0:01.74 6.8% 28+283k 0+500io 0pf+0w
    [nfs]# time dd if=/dev/zero of=/mnt/test bs=64k count=2000
    131072000 bytes transferred in 3.131403 secs (41857273 bytes/sec)
    0.000u 0.245s 0:03.14 7.6% 25+335k 0+1000io 0pf+0w
    [nfs]# time dd if=/dev/zero of=/mnt/test bs=128k count=2000
    262144000 bytes transferred in 6.973014 secs (37594073 bytes/sec)
    0.000u 0.509s 0:07.00 7.1% 26+510k 0+2000io 0pf+0w
    [nfs]# time dd if=/dev/zero of=/mnt/test bs=256k count=2000
    524288000 bytes transferred in 14.253915 secs (36782035 bytes/sec)
    0.000u 1.003s 0:14.30 6.9% 25+784k 0+4000io 0pf+0w
    [nfs]# time dd if=/dev/zero of=/mnt/test bs=512k count=2000
    1048576000 bytes transferred in 28.135716 secs (37268502 bytes/sec)
    0.008u 2.165s 0:28.21 7.6% 24+1386k 0+8000io 0pf+0w
    [nfs]#

    LINUX 2.6.10

    pm>set size 300 100000
    pm>set location /mnt
    pm>set transactions 400000
    pm>run
    Creating files...Done
    Performing transactions..........Done
    Deleting files...Done
    Time:
             1504 seconds total
             1503 seconds of transactions (266 per second)

    Files:
             200107 created (133 per second)
                     Creation alone: 500 files (500 per second)
                     Mixed with transactions: 199607 files (132 per second)
             199905 read (133 per second)
             199384 appended (132 per second)
             200107 deleted (133 per second)
                     Deletion alone: 889 files (889 per second)
                     Mixed with transactions: 199218 files (132 per second)

    Data:
             12715.55 megabytes read (8.45 megabytes per second)
             12728.92 megabytes written (8.46 megabytes per second)
    pm>

    RELENG_5.
    PostMark v1.5 : 3/27/01
    pm>set location /mnt
    pm>size 300 100000
    Eh?
    pm>set size 300 100000
    pm>set location /mnt
    pm>set transactions 400000
    pm>run
    Creating files...Done
    Performing transactions..........Done
    Deleting files...Done
    Time:
             2490 seconds total
             2487 seconds of transactions (160 per second)

    Files:
             200107 created (80 per second)
                     Creation alone: 500 files (500 per second)
                     Mixed with transactions: 199607 files (80 per second)
             199905 read (80 per second)
             199384 appended (80 per second)
             200107 deleted (80 per second)
                     Deletion alone: 889 files (444 per second)
                     Mixed with transactions: 199218 files (80 per second)

    Data:
             12715.55 megabytes read (5.11 megabytes per second)
             12728.92 megabytes written (5.11 megabytes per second)
    pm>

    RELENG_4 (Note, this was on a different partition on the RAID5 card

    pm>set size 300 100000
    pm>set location /card0-a
    pm>set transactions 400000
    pm>run
    Creating files...Done
    Performing transactions..........Done
    Deleting files...Done
    Time:
             1219 seconds total
             1219 seconds of transactions (328 per second)

    Files:
             200107 created (164 per second)
                     Creation alone: 500 files (500 per second)
                     Mixed with transactions: 199607 files (163 per second)
             199905 read (163 per second)
             199384 appended (163 per second)
             200107 deleted (164 per second)
                     Deletion alone: 889 files (889 per second)
                     Mixed with transactions: 199218 files (163 per second)

    Data:
             12715.55 megabytes read (10.43 megabytes per second)
             12728.92 megabytes written (10.44 megabytes per second)
    pm>

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