From: "Joseph Malicki" <jmalicki@starbak.net>
To: "Bharath Krishnan" <bharath@mit.edu>, <linux-kernel@vger.kernel.org>
Subject: Re: Yet another disk transfer speed problem
Date: Thu, 28 Feb 2002 14:55:15 -0500 [thread overview]
Message-ID: <006401c1c091$d721ec00$5a5b903f@h90> (raw)
In-Reply-To: <1014914087.3274.22.camel@wavelets.mit.edu>
Have you considered that perhaps one of your drives is just faster than the
other?
This happens.
-joe
----- Original Message -----
From: "Bharath Krishnan" <bharath@mit.edu>
To: <linux-kernel@vger.kernel.org>
Sent: Thursday, February 28, 2002 11:34 AM
Subject: Yet another disk transfer speed problem
> Hello!
>
> Please CC: me on replies,
>
> Problem: ata disk on secondary controller of PDC20265
> gives sub-par performance.
>
> both disks have c3 and d1 set along with X69.
>
> hdparm -tT /dev/hdg:
> /dev/hdg:
> Timing buffer-cache reads: 128 MB in 0.77 seconds =166.23 MB/sec
> Timing buffered disk reads: 64 MB in 3.81 seconds = 16.80 MB/sec
>
> compared to
> hdparm -tT /dev/hde:
> /dev/hde:
> Timing buffer-cache reads: 128 MB in 0.73 seconds =175.34 MB/sec
> Timing buffered disk reads: 64 MB in 1.82 seconds = 35.16 MB/sec
>
>
> Setup:
> kernel: 2.4.17
> pdc20265 controller on asus a7v motherboard.
> kernel config options:
> CONFIG_BLK_DEV_PDC202XX=y
> CONFIG_PDC202XX_BURST=y
> # CONFIG_PDC202XX_FORCE is not set
> # CONFIG_BLK_DEV_ATARAID_PDC is not set
>
> similar behavior with redhat 7.2 updated kernel 2.4.9-21
>
> hde: IBM-DTLA-307015, ATA DISK drive
> hdg: MAXTOR 6L040J2, ATA DISK drive
>
> Interesting stuff from dmesg:
> ide2: BM-DMA at 0x8000-0x8007, BIOS settings: hde:DMA, hdf:pio
> ide3: BM-DMA at 0x8008-0x800f, BIOS settings: hdg:DMA, hdh:pio
>
> cat /proc/ide/ide2/config
> pci bus 00 device 88 vid 105a did 0d30 channel 0
> 5a 10 30 0d 07 00 10 02 02 00 80 01 00 20 00 00
> 01 94 00 00 01 90 00 00 01 88 00 00 01 84 00 00
> 01 80 00 00 00 00 00 d4 00 00 00 00 5a 10 33 4d
> 00 00 00 00 58 00 00 00 00 00 00 00 0a 01 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> be 33 00 00 00 00 00 00 01 00 01 00 00 00 00 00
> f1 24 41 00 c4 f3 4f 00 f1 24 41 00 c4 f3 4f 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>
> cat /proc/ide/ide3/config
> pci bus 00 device 88 vid 105a did 0d30 channel 1
> 5a 10 30 0d 07 00 10 02 02 00 80 01 00 20 00 00
> 01 94 00 00 01 90 00 00 01 88 00 00 01 84 00 00
> 01 80 00 00 00 00 00 d4 00 00 00 00 5a 10 33 4d
> 00 00 00 00 58 00 00 00 00 00 00 00 0a 01 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> be 33 00 00 00 00 00 00 01 00 01 00 00 00 00 00
> f1 24 41 00 c4 f3 4f 00 f1 24 41 00 c4 f3 4f 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>
> hdparm -i
> /dev/hde
> Model=IBM-DTLA-307015, FwRev=TX2OA50C, SerialNo=YF0YFFX4393
> Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
> RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=40
> BuffType=DualPortCache, BuffSize=1916kB, MaxMultSect=16, MultSect=16
> CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=30003120
> IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
> PIO modes: pio0 pio1 pio2 pio3 pio4
> DMA modes: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
> AdvancedPM=yes: disabled (255)
> Drive Supports : ATA/ATAPI-5 T13 1321D revision 1 : ATA-2 ATA-3 ATA-4
> ATA-5
>
> /dev/hdg
> Model=MAXTOR 6L040J2, FwRev=A93.0300, SerialNo=662125114610
> Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
> RawCHS=16383/16/63, TrkSize=32256, SectSize=21298, ECCbytes=4
> BuffType=DualPortCache, BuffSize=1820kB, MaxMultSect=16, MultSect=16
> CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=78177792
> IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
> PIO modes: pio0 pio1 pio2 pio3 pio4
> DMA modes: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5 udma6
> AdvancedPM=no
> Drive Supports : ATA/ATAPI-5 T13 1321D revision 1 : ATA-1 ATA-2 ATA-3
> ATA-4 ATA-5
>
> cat /proc/ide/pdc202xx
> PDC20265 Chipset.
> ------------------------------- General Status
> ---------------------------------Burst Mode :
> enabled
> Host Mode : Normal
> Bus Clocking : 33 PCI Internal
> IO pad select : 10 mA
> Status Polling Period : 8
> Interrupt Check Status Polling Delay : 11
> --------------- Primary Channel ---------------- Secondary Channel ----
> enabled enabled
> 66 Clocking enabled enabled
> Mode PCI Mode PCI
> FIFO Empty FIFO Empty
> --------------- drive0 --------- drive1 -------- drive0 ----------
> drive1 -DMA enabled: yes no
> yes no
> DMA Mode: UDMA 4 NOTSET UDMA 4
> NOTSET
> PIO Mode: PIO 4 NOTSET PIO 4
> NOTSET
>
>
> What is going on? I do have ata100 cables.
>
> Thanks,
>
> -bharath
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
>
next prev parent reply other threads:[~2002-02-28 20:06 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-02-28 16:34 Yet another disk transfer speed problem Bharath Krishnan
2002-02-28 19:55 ` Joseph Malicki [this message]
2002-02-28 20:06 ` Bharath Krishnan
2002-03-01 9:02 ` Helge Hafting
2002-03-01 19:50 ` Bharath Krishnan
2002-03-01 15:58 ` Holger Lubitz
-- strict thread matches above, loose matches on Subject: below --
2002-03-01 19:54 Bharath Krishnan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='006401c1c091$d721ec00$5a5b903f@h90' \
--to=jmalicki@starbak.net \
--cc=bharath@mit.edu \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.