Date: Fri, 4 Feb 2005 17:44:42 -0700 From: Nick Pavlica <linicks@gmail.com> To: Jeff Roberson <jroberson@chesapeake.net> Cc: freebsd-performance@freebsd.org Subject: Re: My disk I/O testing methods for FreeBSD 5.3 ... Message-ID: <dc9ba04405020416443d9fb168@mail.gmail.com> In-Reply-To: <20050203230343.M18864@mail.chesapeake.net> References: <dc9ba044050203143647cee0c2@mail.gmail.com> <20050203175519.K18864@mail.chesapeake.net> <dc9ba0440502031548544723a1@mail.gmail.com> <20050203230343.M18864@mail.chesapeake.net>
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Jeff,
Here is the data from the same test on the exact same server with
4.11R installed.
minime# time dd bs=1024 if=/dev/zero of=tstfile count=1m
1048576+0 records in
1048576+0 records out
1073741824 bytes transferred in 25.278113 secs (42477135 bytes/sec)
------------------------------------------------------------------------------------------------------------------------
real 0m25.387s
user 0m0.719s
sys 0m6.794s
------------------------------------------------------------------------------------------------------------------------
minime# sysctl hw.ata
hw.ata.ata_dma: 1
hw.ata.wc: 1
hw.ata.tags: 0
hw.ata.suspend: 0
hw.ata.atapi_dma: 0
------------------------------------------------------------------------------------------------------------------------
minime# atacontrol list
ATA channel 0:
Master: ad0 <ST340014A/3.16> ATA/ATAPI rev 6
Slave: no device present
ATA channel 1:
Master: acd0 <Lite-On LTN486S 48x Max/YDS6> ATA/ATAPI rev 0
Slave: no device present
ATA channel 2:
Master: no device present
Slave: no device present
ATA channel 3:
Master: no device present
Slave: no device present
------------------------------------------------------------------------------------------------------------------------
minime# atacontrol mode 0
Master = UDMA100
Slave = ???
------------------------------------------------------------------------------------------------------------------------
minime# atacontrol mode 1
Master = PIO4
Slave = ???
------------------------------------------------------------------------------------------------------------------------
--Nick
On Thu, 3 Feb 2005 23:03:55 -0500 (EST), Jeff Roberson
<jroberson@chesapeake.net> wrote:
>
> On Thu, 3 Feb 2005, Nick Pavlica wrote:
>
> > Jeff,
> > One of the tests where I saw a large difference was in DD. I did a
> > quick test on a server that was brought up to RELENG_5 via cvsup on
> > 2/2/05.
>
> Can you give me the same from RELENG_4?
>
> >
> > The Test:
> > -bash-2.05b$ time dd bs=1024 if=/dev/zero of=tstfile count=1M
> > 1048576+0 records in
> > 1048576+0 records out
> > 1073741824 bytes transferred in 74.402757 secs (14431479 bytes/sec)
> >
> > real 1m14.498s
> > user 0m0.550s
> > sys 0m8.838s
> >
> >
> > The vmstat -1 info is attached.
> >
> >
> > Thanks!
> > --Nick
> >
> >
> >
> > On Thu, 3 Feb 2005 17:59:30 -0500 (EST), Jeff Roberson
> > <jroberson@chesapeake.net> wrote:
> > >
> > > On Thu, 3 Feb 2005, Nick Pavlica wrote:
> > >
> > > > All,
> > > > I would like to share the methods that I have been using in my disk
> > > > I/O testing. The detailed results of these tests have been posted to
> > > > the performance and questions mailing lists under the title " FreeBSD
> > > > 5.3 I/O Performance / Linux 2.6.10 | Continued Discussion". I
> > > > originally started this testing as due diligence in an up coming
> > > > project. As a result of this testing I discovered an elegant
> > > > operating system that I enjoy working with.
> > >
> > > Nick, first, I'd like to thank you for your efforts so far. I think your
> > > tests have been very informative. I'd like to see what we can do to get
> > > to the bottom of the differences. Can you perform one test which varied
> > > greatly between 5.x and 4.x and collect some data for us? To start with,
> > > the output of vmstat 1 piped to a file would be informative. Do you have
> > > any indication that 5.x is actually cpu bound in a case where 4.x is not?
> > > I'm wondering if this is a latency issue or a cpu utilization issue.
> > >
> > > I intend to backport some code that lets me graph system activity into
> > > RELENG_5. Are you setup to cvsup to this tag? Would it be convenient for
> > > you to do so?
> > >
> > > Thanks,
> > > Jeff
> > >
> > > >
> > > > Intent Of This Testing:
> > > > 1)To measure the disk I/O performance of various operating systems for
> > > > use as a production database server.
> > > > 2)Help improve the disk I/O performance of FreeBSD 5.x and greater by
> > > > assisting the FreeBSD development team in identifying possible
> > > > performance issues, and provide them with data to measure the success
> > > > of various changes to the operating system.
> > > >
> > > > Operating Systems tested:
> > > > Fedora Core 3 with EXT3, and XFS. I tested with and with out patches.
> > > > SUSE Enterprise Server 9 with Riser FS.
> > > > FreeBSD 4.11R
> > > > FreeBSD 5.3R, RELENG_5_3, RELENG_5
> > > > NetBSD 2.0R
> > > > OpenBSD 3.6R
> > > >
> > > > Test Hardware:
> > > > Compaq DeskPro, PIII 800, 384Mb Ram, 10Gb IDE HD.
> > > > Dell PE 2400, Dual PIII 550, 512Mb Ram, (2)10K,LVD SCSI, RAID 1, PERC
> > > > 2SI controller with 64Mb ram.
> > > > Dell PE SC400, 2.4Ghz P4, 256MB Ram, 40Gb IDE HD.
> > > > Dell 4600, 2.8 Ghz P4 with HT, 512MB Ram, 80GB IDE HD.
> > > >
> > > > Installation Notes:
> > > > It's my intention to test these Operating Systems using as many of
> > > > the default installation options as possible with no special tuning.
> > > > The only deviations in my previous testing were as follows: The #linux
> > > > xfs option was used when installing Fedora so that I could use XFS,
> > > > and a special test where I installed 5.3R with UFS instead of UFS2 (I
> > > > didn't see any improvement when using UFS). I installed FreeBSD using
> > > > the standard install option, and used the auto allocate features for
> > > > partitioning and slicing. I installed Fedora with the stock server
> > > > packages and created a 100Mb /boot, 512Mb swap, and allocated the
> > > > remaining space to /. I tested FreeBSD5.3R and FC3R with and without
> > > > updates. I used cvsup to update FreeBSD and yum update to update
> > > > Fedora. I didn't do any updating to FreeBSD4.11R, NetBSD2.0, and
> > > > OpenBSD3.6.
> > > >
> > > > I used the following utilities/tools in my testing:
> > > > DD
> > > > CP
> > > > IOSTAT (iostat -d 2)
> > > > Bonnie++
> > > > TOP
> > > > SQL,PL, PSQL
> > > > Postgresql 8.0
> > > >
> > > > DD Example Tests:
> > > > - #time dd bs=1024 if=/dev/zero of=tstfile count=1M
> > > > - #time dd bs=1024 if=/dev/zero of=tstfile count=2M
> > > > - #time dd bs=1024 if=/dev/zero of=tstfile count=3M
> > > >
> > > > Bonnie++ Example Tests:
> > > > #bonnie++ -u root -s 1024 -r 512 -n 5
> > > > #bonnie++ -u root -s 2048 -r 512 -n 5
> > > > #bonnie++ -u root -s 3072 -r 512 -n 5
> > > >
> > > > CP Example Tests:
> > > > #time cp tstfile tstfile2
> > > >
> > > > SQL, PL, PSQL Example Tests:
> > > >
> > > > CREATE TABLE test1 (
> > > > thedate TIMESTAMP,
> > > > astring VARCHAR(200),
> > > > anumber INTEGER
> > > > );
> > > >
> > > > CREATE FUNCTION build_data() RETURNS integer AS '
> > > > DECLARE
> > > > i INTEGER DEFAULT 0;
> > > > curtime TIMESTAMP;
> > > > BEGIN
> > > > FOR i IN 1..1000000 LOOP
> > > > curtime := ''now'';
> > > > INSERT INTO test1 VALUES (curtime, ''test string'', i);
> > > > END LOOP;
> > > > RETURN 1;
> > > > END;
> > > > ' LANGUAGE 'plpgsql';
> > > >
> > > > SELECT build_data();
> > > > Then the following script is run under the time program to ascertain
> > > > how long it takes to run:
> > > > CREATE TABLE test2 (
> > > > thedate TIMESTAMP,
> > > > astring VARCHAR(200),
> > > > anumber INTEGER
> > > > );
> > > > CREATE TABLE test3 AS SELECT * FROM test1;
> > > > INSERT INTO test2 SELECT * FROM test1 WHERE ((anumber % 2) = 0);
> > > > DELETE FROM test3 WHERE ((anumber % 2) = 0);
> > > > DELETE FROM test3 WHERE ((anumber % 13) = 0);
> > > > CREATE TABLE test4 AS
> > > > SELECT test1.thedate AS t1date,
> > > > test2.thedate AS t2date,
> > > > test1.astring AS t1string,
> > > > test2.astring AS t2string,
> > > > test1.anumber AS t1number,
> > > > test2.anumber AS t2number
> > > > FROM test1 JOIN test2 ON test1.anumber=test2.anumber;
> > > > UPDATE test3 SET thedate='now' WHERE ((anumber % 5) = 0);
> > > > DROP TABLE test4;
> > > > CREATE TABLE test4 AS SELECT * FROM test1;
> > > > DELETE FROM test4 WHERE ((anumber % 27) = 0);
> > > > VACUUM ANALYZE;
> > > > VACUUM FULL;
> > > > DROP TABLE test4;
> > > > DROP TABLE test3;
> > > > DROP TABLE test2;
> > > > VACUUM FULL;
> > > >
> > > > Example FS TAB:
> > > >
> > > > minime# cat /etc/fstab
> > > > # Device Mountpoint FStype Options Dump Pass#
> > > > /dev/ad0s1b none swap sw 0 0
> > > > /dev/ad0s1a / ufs rw 1 1
> > > > /dev/ad0s1e /tmp ufs rw 2 2
> > > > /dev/ad0s1f /usr ufs rw 2 2
> > > > /dev/ad0s1d /var ufs rw 2 2
> > > > /dev/acd0 /cdrom cd9660 ro,noauto 0 0
> > > >
> > > > Verification Of Test:
> > > > I have been able to get consistent results in all of my testing.
> > > > However, I think the best verification would be to have as many people
> > > > as possible test the disk I/O performance on a range of hardware,
> > > > testing methods, and configurations.
> > > >
> > > > Summary Of Results:
> > > > The results of my testing have consistently demonstrated that
> > > > FreeBSD5.3+ has dramatically slower disk I/O performance than all of
> > > > the other operating systems that were tested. FreeBSD 4.11R was the
> > > > performance leader followed by Fedora C3 with XFS. All of the BSD
> > > > distributions, with the exception of 5.3+, were able to consistently
> > > > demonstrate a throughput of 56-58Mb/s sustained throughput, while 5.3+
> > > > consistently demonstrated a throughput of 12-15Mb/s (58 -15 = 43 ?).
> > > >
> > > > Please let me know if you need any additional details.
> > > >
> > > > Thanks!
> > > > --Nick Pavlica
> > > > _______________________________________________
> > > > freebsd-performance@freebsd.org mailing list
> > > > http://lists.freebsd.org/mailman/listinfo/freebsd-performance
> > > > To unsubscribe, send any mail to "freebsd-performance-unsubscribe@freebsd.org"
> > > >
> > >
> >
>
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