* Linux 2.6.16 - SATA read performance drop ~50% on Intel 82801GB/GR/GH
@ 2006-04-11 23:36 Andreas Schnaiter
2006-04-12 3:57 ` Jeff Garzik
` (2 more replies)
0 siblings, 3 replies; 5+ messages in thread
From: Andreas Schnaiter @ 2006-04-11 23:36 UTC (permalink / raw)
To: linux-kernel
[-- Attachment #1: Type: text/plain, Size: 11952 bytes --]
Hi,
after upgrading from linux 2.6.15.7 to 2.6.16.2 I noticed an extreme slowdown
of the SATA disks on my system. Writing/reading a 8GB file showed that
reading performes with less than half the speed on 2.6.16 (strangely hdparm
shows almost no difference).
The two affected disks are connected to the Intel 82801GB/GR/GH (ICH7 Family)
Serial ATA Controller.
Disks on the Silicon Image/Intel IDE Controllers are not affected.
I didn't have the chance yet to test if this problem also exists on the
Silicon Image SATA Controller.
Please tell me if there is any other useful information I can provide =)
Linux 2.6.15.7
---
# time dd if=/dev/zero of=/benchfile bs=1M count=8192
8192+0 records in
8192+0 records out
8589934592 bytes (8.6 GB) copied, 132.224 seconds, 65.0 MB/s
real 2m12.347s
user 0m0.018s
sys 0m18.398s
# time dd if=/benchfile of=/dev/null bs=1M
8192+0 records in
8192+0 records out
8589934592 bytes (8.6 GB) copied, 130.547 seconds, 65.8 MB/s
real 2m10.670s
user 0m0.023s
sys 0m14.238s
# hdparm -tT /dev/sdb
/dev/sdb:
Timing cached reads: 4488 MB in 2.00 seconds = 2244.34 MB/sec
Timing buffered disk reads: 212 MB in 3.02 seconds = 70.30 MB/sec
Linux 2.6.16.2
---
# time dd if=/dev/zero of=/benchfile bs=1M count=8192
8192+0 records in
8192+0 records out
8589934592 bytes (8.6 GB) copied, 122.256 seconds, 70.3 MB/s
real 2m2.460s
user 0m0.013s
sys 0m17.971s
# time dd if=/benchfile of=/dev/null bs=1M
8192+0 records in
8192+0 records out
8589934592 bytes (8.6 GB) copied, 302.452 seconds, 28.4 MB/s
real 5m3.100s
user 0m0.021s
sys 0m40.521s
# hdparm -tT /dev/sdb
/dev/sdb:
Timing cached reads: 4520 MB in 2.00 seconds = 2264.99 MB/sec
Timing buffered disk reads: 212 MB in 3.03 seconds = 70.03 MB/sec
# lspci -v
00:00.0 Host bridge: Intel Corporation 955X Memory Controller Hub
Subsystem: Intel Corporation: Unknown device 4b42
Flags: bus master, fast devsel, latency 0
Capabilities: [e0] #09 [2109]
00:01.0 PCI bridge: Intel Corporation 955X PCI Express Graphics Port (prog-if
00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
Memory behind bridge: 90000000-91ffffff
Prefetchable memory behind bridge: 0000000080000000-000000008ff00000
Capabilities: [88] #0d [0000]
Capabilities: [80] Power Management version 2
Capabilities: [90] Message Signalled Interrupts: 64bit- Queue=0/0
Enable-
Capabilities: [a0] #10 [0141]
00:1b.0 Class 0403: Intel Corporation 82801G (ICH7 Family) High Definition
Audio Controller (rev 01)
Subsystem: Intel Corporation: Unknown device 0013
Flags: bus master, fast devsel, latency 0, IRQ 19
Memory at 92200000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [50] Power Management version 2
Capabilities: [60] Message Signalled Interrupts: 64bit+ Queue=0/0
Enable-
Capabilities: [70] #10 [0091]
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1
(rev 01) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
Memory behind bridge: 92300000-923fffff
Capabilities: [40] #10 [0141]
Capabilities: [80] Message Signalled Interrupts: 64bit- Queue=0/0
Enable-
Capabilities: [90] #0d [0000]
Capabilities: [a0] Power Management version 2
00:1c.4 PCI bridge: Intel Corporation 82801GR/GH/GHM (ICH7 Family) PCI Express
Port 5 (rev 01) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
Memory behind bridge: 92400000-924fffff
Capabilities: [40] #10 [0141]
Capabilities: [80] Message Signalled Interrupts: 64bit- Queue=0/0
Enable-
Capabilities: [90] #0d [0000]
Capabilities: [a0] Power Management version 2
00:1c.5 PCI bridge: Intel Corporation 82801GR/GH/GHM (ICH7 Family) PCI Express
Port 6 (rev 01) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=04, subordinate=04, sec-latency=0
I/O behind bridge: 00002000-00002fff
Memory behind bridge: 92100000-921fffff
Capabilities: [40] #10 [0141]
Capabilities: [80] Message Signalled Interrupts: 64bit- Queue=0/0
Enable-
Capabilities: [90] #0d [0000]
Capabilities: [a0] Power Management version 2
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #1
(rev 01) (prog-if 00 [UHCI])
Subsystem: Intel Corporation: Unknown device 4b42
Flags: bus master, medium devsel, latency 0, IRQ 21
I/O ports at 3080 [size=32]
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #2
(rev 01) (prog-if 00 [UHCI])
Subsystem: Intel Corporation: Unknown device 4b42
Flags: bus master, medium devsel, latency 0, IRQ 20
I/O ports at 3060 [size=32]
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #3
(rev 01) (prog-if 00 [UHCI])
Subsystem: Intel Corporation: Unknown device 4b42
Flags: bus master, medium devsel, latency 0, IRQ 18
I/O ports at 3040 [size=32]
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #4
(rev 01) (prog-if 00 [UHCI])
Subsystem: Intel Corporation: Unknown device 4b42
Flags: bus master, medium devsel, latency 0, IRQ 16
I/O ports at 3020 [size=32]
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI
Controller (rev 01) (prog-if 20 [EHCI])
Subsystem: Intel Corporation: Unknown device 4b42
Flags: bus master, medium devsel, latency 0, IRQ 21
Memory at 92204400 (32-bit, non-prefetchable) [size=1K]
Capabilities: [50] Power Management version 2
Capabilities: [58] #0a [20a0]
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1) (prog-if 01
[Subtractive decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=05, subordinate=05, sec-latency=32
I/O behind bridge: 00001000-00001fff
Memory behind bridge: 92000000-920fffff
Prefetchable memory behind bridge: 0000000092500000-0000000092500000
Capabilities: [50] #0d [0000]
00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface
Bridge (rev 01)
Subsystem: Intel Corporation: Unknown device 4b42
Flags: bus master, medium devsel, latency 0
Capabilities: [e0] #09 [100c]
00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller
(rev 01) (prog-if 8a [Master SecP PriP])
Subsystem: Intel Corporation: Unknown device 4b42
Flags: bus master, medium devsel, latency 0, IRQ 18
I/O ports at <unassigned>
I/O ports at <unassigned>
I/O ports at <unassigned>
I/O ports at <unassigned>
I/O ports at 30b0 [size=16]
00:1f.2 IDE interface: Intel Corporation 82801GB/GR/GH (ICH7 Family) Serial
ATA Storage Controllers cc=IDE (rev 01) (prog-if 8f [Master SecP SecO PriP
PriO])
Subsystem: Intel Corporation: Unknown device 4b42
Flags: bus master, 66Mhz, medium devsel, latency 0, IRQ 20
I/O ports at 30c8 [size=8]
I/O ports at 30e4 [size=4]
I/O ports at 30c0 [size=8]
I/O ports at 30e0 [size=4]
I/O ports at 30a0 [size=16]
Memory at 92204000 (32-bit, non-prefetchable) [size=1K]
Capabilities: [70] Power Management version 2
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev
01)
Subsystem: Intel Corporation: Unknown device 4b42
Flags: medium devsel, IRQ 9
I/O ports at 3000 [size=32]
01:00.0 VGA compatible controller: nVidia Corporation GeForce 6200
TurboCache(TM) (rev a1) (prog-if 00 [VGA])
Subsystem: nVidia Corporation: Unknown device 025d
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at 91000000 (32-bit, non-prefetchable) [size=16M]
Memory at 80000000 (64-bit, prefetchable) [size=256M]
Memory at 90000000 (64-bit, non-prefetchable) [size=16M]
Capabilities: [60] Power Management version 2
Capabilities: [68] Message Signalled Interrupts: 64bit+ Queue=0/0
Enable-
Capabilities: [78] #10 [0001]
04:00.0 Ethernet controller: Intel Corporation 82573V Gigabit Ethernet
Controller (Copper) (rev 03)
Subsystem: Intel Corporation: Unknown device 3083
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at 92100000 (32-bit, non-prefetchable) [size=128K]
I/O ports at 2000 [size=32]
Capabilities: [c8] Power Management version 2
Capabilities: [d0] Message Signalled Interrupts: 64bit+ Queue=0/0
Enable-
Capabilities: [e0] #10 [0001]
05:00.0 Multimedia audio controller: Creative Labs SB Audigy (rev 04)
Subsystem: Creative Labs SB Audigy 2 ZS (SB0350)
Flags: bus master, medium devsel, latency 32, IRQ 22
I/O ports at 1100 [size=64]
Capabilities: [dc] Power Management version 2
05:00.1 Input device controller: Creative Labs SB Audigy MIDI/Game port (rev
04)
Subsystem: Creative Labs SB Audigy MIDI/Game Port
Flags: bus master, medium devsel, latency 32
I/O ports at 1180 [size=8]
Capabilities: [dc] Power Management version 2
05:00.2 FireWire (IEEE 1394): Creative Labs SB Audigy FireWire Port (rev 04)
(prog-if 10 [OHCI])
Subsystem: Creative Labs SB Audigy FireWire Port
Flags: bus master, medium devsel, latency 32, IRQ 19
Memory at 92008800 (32-bit, non-prefetchable) [size=2K]
Memory at 92004000 (32-bit, non-prefetchable) [size=16K]
Capabilities: [44] Power Management version 2
05:01.0 RAID bus controller: Silicon Image, Inc. PCI0680 Ultra ATA-133 Host
Controller (rev 02)
Subsystem: Silicon Image, Inc. Winic W-680 (Silicon Image 680 based)
Flags: bus master, medium devsel, latency 32, IRQ 19
I/O ports at 1178 [size=8]
I/O ports at 1194 [size=4]
I/O ports at 1170 [size=8]
I/O ports at 1190 [size=4]
I/O ports at 1150 [size=16]
Memory at 92009500 (32-bit, non-prefetchable) [size=256]
Expansion ROM at fff80000 [disabled] [size=512K]
Capabilities: [60] Power Management version 2
05:02.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL-8139/8139C/8139C+ (rev 10)
Subsystem: Realtek Semiconductor Co., Ltd. RT8139
Flags: bus master, medium devsel, latency 32, IRQ 18
I/O ports at 1000 [size=256]
Memory at 92009400 (32-bit, non-prefetchable) [size=256]
Expansion ROM at 92580000 [disabled] [size=64K]
Capabilities: [50] Power Management version 2
05:04.0 FireWire (IEEE 1394): Texas Instruments TSB82AA2 IEEE-1394b Link Layer
Controller (rev 01) (prog-if 10 [OHCI])
Subsystem: Intel Corporation: Unknown device 4b42
Flags: bus master, medium devsel, latency 32, IRQ 18
Memory at 92008000 (32-bit, non-prefetchable) [size=2K]
Memory at 92000000 (32-bit, non-prefetchable) [size=16K]
Capabilities: [44] Power Management version 2
05:05.0 RAID bus controller: Silicon Image, Inc. SiI 3114 [SATALink/SATARaid]
Serial ATA Controller (rev 02)
Subsystem: Intel Corporation: Unknown device 7114
Flags: bus master, 66Mhz, medium devsel, latency 32, IRQ 17
I/O ports at 1168 [size=8]
I/O ports at 118c [size=4]
I/O ports at 1160 [size=8]
I/O ports at 1188 [size=4]
I/O ports at 1140 [size=16]
Memory at 92009000 (32-bit, non-prefetchable) [size=1K]
Expansion ROM at 92500000 [disabled] [size=512K]
Capabilities: [60] Power Management version 2
---
regards,
Andreas
[-- Attachment #2: config-2.6.15.gz --]
[-- Type: application/x-gzip, Size: 10683 bytes --]
[-- Attachment #3: config-2.6.16.gz --]
[-- Type: application/x-gzip, Size: 10870 bytes --]
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Linux 2.6.16 - SATA read performance drop ~50% on Intel 82801GB/GR/GH
2006-04-11 23:36 Linux 2.6.16 - SATA read performance drop ~50% on Intel 82801GB/GR/GH Andreas Schnaiter
@ 2006-04-12 3:57 ` Jeff Garzik
2006-04-12 9:49 ` Jan Engelhardt
2006-04-12 21:22 ` Bill Davidsen
2006-04-14 23:00 ` Linda Walsh
2 siblings, 1 reply; 5+ messages in thread
From: Jeff Garzik @ 2006-04-12 3:57 UTC (permalink / raw)
To: Andreas Schnaiter; +Cc: linux-kernel
Andreas Schnaiter wrote:
> Hi,
>
> after upgrading from linux 2.6.15.7 to 2.6.16.2 I noticed an extreme slowdown
> of the SATA disks on my system. Writing/reading a 8GB file showed that
> reading performes with less than half the speed on 2.6.16 (strangely hdparm
> shows almost no difference).
> The two affected disks are connected to the Intel 82801GB/GR/GH (ICH7 Family)
> Serial ATA Controller.
> Disks on the Silicon Image/Intel IDE Controllers are not affected.
> I didn't have the chance yet to test if this problem also exists on the
> Silicon Image SATA Controller.
hdparm usually skips the usual layers, and benchmarks the ATA command
submission itself. So if hdparm didn't change, that may indicate the
problem is either in the block (scheduler?) or filesystem layers.
Tests:
1) Try with Silicon Image controller, as you mentioned. Try in same
machine with same device, if possible.
2) Eliminate the filesystem layer by doing dd directly to the block
device (dd ... of=/dev/sda1) rather than dd'ing to a file on a filesystem.
3) Try decreasing the block size to 4k or 8k.
4) Finally, the thing that will help us kernel hackers the most, use
'git bisect' to definitively discover the changeset that causes your
problems.
Jeff
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Linux 2.6.16 - SATA read performance drop ~50% on Intel 82801GB/GR/GH
2006-04-12 3:57 ` Jeff Garzik
@ 2006-04-12 9:49 ` Jan Engelhardt
0 siblings, 0 replies; 5+ messages in thread
From: Jan Engelhardt @ 2006-04-12 9:49 UTC (permalink / raw)
To: Jeff Garzik; +Cc: Andreas Schnaiter, linux-kernel
>
> hdparm usually skips the usual layers, and benchmarks the ATA command
> submission itself. So if hdparm didn't change, that may indicate the problem
> is either in the block (scheduler?) or filesystem layers.
>
> Tests:
>
> 2) Eliminate the filesystem layer by doing dd directly to the block device (dd
> ... of=/dev/sda1) rather than dd'ing to a file on a filesystem.
Use dd_rescue (dd_rescue /dev/sda /dev/null) and watch the 'cur rate'
marker. It should naturally drop over time (that is, it's less at the end
of the hard disk). If it instantly drops somewhere (and the system is not
otherwise loaded), it may indicate that the harddisk is going bad.
I have seen disks that ran previously with udma4 speeds drop down to
900KB/s making backup to CD in the last minute a real excitement.
Jan Engelhardt
--
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Linux 2.6.16 - SATA read performance drop ~50% on Intel 82801GB/GR/GH
2006-04-11 23:36 Linux 2.6.16 - SATA read performance drop ~50% on Intel 82801GB/GR/GH Andreas Schnaiter
2006-04-12 3:57 ` Jeff Garzik
@ 2006-04-12 21:22 ` Bill Davidsen
2006-04-14 23:00 ` Linda Walsh
2 siblings, 0 replies; 5+ messages in thread
From: Bill Davidsen @ 2006-04-12 21:22 UTC (permalink / raw)
To: linux-kernel
Andreas Schnaiter wrote:
> Hi,
>
> after upgrading from linux 2.6.15.7 to 2.6.16.2 I noticed an extreme slowdown
> of the SATA disks on my system. Writing/reading a 8GB file showed that
> reading performes with less than half the speed on 2.6.16 (strangely hdparm
> shows almost no difference).
> The two affected disks are connected to the Intel 82801GB/GR/GH (ICH7 Family)
> Serial ATA Controller.
> Disks on the Silicon Image/Intel IDE Controllers are not affected.
> I didn't have the chance yet to test if this problem also exists on the
> Silicon Image SATA Controller.
>
> Please tell me if there is any other useful information I can provide =)
Assuming that you reproduce this switching back to the old kernel, that
kind of lets the hardware out as the cause. I have to do measurements on
an SATA system to comment further.
>
>
> Linux 2.6.15.7
> ---
> # time dd if=/dev/zero of=/benchfile bs=1M count=8192
> 8192+0 records in
> 8192+0 records out
> 8589934592 bytes (8.6 GB) copied, 132.224 seconds, 65.0 MB/s
>
> real 2m12.347s
> user 0m0.018s
> sys 0m18.398s
>
> # time dd if=/benchfile of=/dev/null bs=1M
> 8192+0 records in
> 8192+0 records out
> 8589934592 bytes (8.6 GB) copied, 130.547 seconds, 65.8 MB/s
>
> real 2m10.670s
> user 0m0.023s
> sys 0m14.238s
>
> # hdparm -tT /dev/sdb
>
> /dev/sdb:
> Timing cached reads: 4488 MB in 2.00 seconds = 2244.34 MB/sec
> Timing buffered disk reads: 212 MB in 3.02 seconds = 70.30 MB/sec
>
>
> Linux 2.6.16.2
> ---
> # time dd if=/dev/zero of=/benchfile bs=1M count=8192
> 8192+0 records in
> 8192+0 records out
> 8589934592 bytes (8.6 GB) copied, 122.256 seconds, 70.3 MB/s
>
> real 2m2.460s
> user 0m0.013s
> sys 0m17.971s
>
> # time dd if=/benchfile of=/dev/null bs=1M
> 8192+0 records in
> 8192+0 records out
> 8589934592 bytes (8.6 GB) copied, 302.452 seconds, 28.4 MB/s
>
> real 5m3.100s
> user 0m0.021s
> sys 0m40.521s
>
> # hdparm -tT /dev/sdb
>
> /dev/sdb:
> Timing cached reads: 4520 MB in 2.00 seconds = 2264.99 MB/sec
> Timing buffered disk reads: 212 MB in 3.03 seconds = 70.03 MB/sec
>
>
> # lspci -v
> 00:00.0 Host bridge: Intel Corporation 955X Memory Controller Hub
> Subsystem: Intel Corporation: Unknown device 4b42
> Flags: bus master, fast devsel, latency 0
> Capabilities: [e0] #09 [2109]
>
> 00:01.0 PCI bridge: Intel Corporation 955X PCI Express Graphics Port (prog-if
> 00 [Normal decode])
> Flags: bus master, fast devsel, latency 0
> Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
> Memory behind bridge: 90000000-91ffffff
> Prefetchable memory behind bridge: 0000000080000000-000000008ff00000
> Capabilities: [88] #0d [0000]
> Capabilities: [80] Power Management version 2
> Capabilities: [90] Message Signalled Interrupts: 64bit- Queue=0/0
> Enable-
> Capabilities: [a0] #10 [0141]
>
> 00:1b.0 Class 0403: Intel Corporation 82801G (ICH7 Family) High Definition
> Audio Controller (rev 01)
> Subsystem: Intel Corporation: Unknown device 0013
> Flags: bus master, fast devsel, latency 0, IRQ 19
> Memory at 92200000 (64-bit, non-prefetchable) [size=16K]
> Capabilities: [50] Power Management version 2
> Capabilities: [60] Message Signalled Interrupts: 64bit+ Queue=0/0
> Enable-
> Capabilities: [70] #10 [0091]
>
> 00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1
> (rev 01) (prog-if 00 [Normal decode])
> Flags: bus master, fast devsel, latency 0
> Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
> Memory behind bridge: 92300000-923fffff
> Capabilities: [40] #10 [0141]
> Capabilities: [80] Message Signalled Interrupts: 64bit- Queue=0/0
> Enable-
> Capabilities: [90] #0d [0000]
> Capabilities: [a0] Power Management version 2
>
> 00:1c.4 PCI bridge: Intel Corporation 82801GR/GH/GHM (ICH7 Family) PCI Express
> Port 5 (rev 01) (prog-if 00 [Normal decode])
> Flags: bus master, fast devsel, latency 0
> Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
> Memory behind bridge: 92400000-924fffff
> Capabilities: [40] #10 [0141]
> Capabilities: [80] Message Signalled Interrupts: 64bit- Queue=0/0
> Enable-
> Capabilities: [90] #0d [0000]
> Capabilities: [a0] Power Management version 2
>
> 00:1c.5 PCI bridge: Intel Corporation 82801GR/GH/GHM (ICH7 Family) PCI Express
> Port 6 (rev 01) (prog-if 00 [Normal decode])
> Flags: bus master, fast devsel, latency 0
> Bus: primary=00, secondary=04, subordinate=04, sec-latency=0
> I/O behind bridge: 00002000-00002fff
> Memory behind bridge: 92100000-921fffff
> Capabilities: [40] #10 [0141]
> Capabilities: [80] Message Signalled Interrupts: 64bit- Queue=0/0
> Enable-
> Capabilities: [90] #0d [0000]
> Capabilities: [a0] Power Management version 2
>
> 00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #1
> (rev 01) (prog-if 00 [UHCI])
> Subsystem: Intel Corporation: Unknown device 4b42
> Flags: bus master, medium devsel, latency 0, IRQ 21
> I/O ports at 3080 [size=32]
>
> 00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #2
> (rev 01) (prog-if 00 [UHCI])
> Subsystem: Intel Corporation: Unknown device 4b42
> Flags: bus master, medium devsel, latency 0, IRQ 20
> I/O ports at 3060 [size=32]
>
> 00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #3
> (rev 01) (prog-if 00 [UHCI])
> Subsystem: Intel Corporation: Unknown device 4b42
> Flags: bus master, medium devsel, latency 0, IRQ 18
> I/O ports at 3040 [size=32]
>
> 00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #4
> (rev 01) (prog-if 00 [UHCI])
> Subsystem: Intel Corporation: Unknown device 4b42
> Flags: bus master, medium devsel, latency 0, IRQ 16
> I/O ports at 3020 [size=32]
>
> 00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI
> Controller (rev 01) (prog-if 20 [EHCI])
> Subsystem: Intel Corporation: Unknown device 4b42
> Flags: bus master, medium devsel, latency 0, IRQ 21
> Memory at 92204400 (32-bit, non-prefetchable) [size=1K]
> Capabilities: [50] Power Management version 2
> Capabilities: [58] #0a [20a0]
>
> 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1) (prog-if 01
> [Subtractive decode])
> Flags: bus master, fast devsel, latency 0
> Bus: primary=00, secondary=05, subordinate=05, sec-latency=32
> I/O behind bridge: 00001000-00001fff
> Memory behind bridge: 92000000-920fffff
> Prefetchable memory behind bridge: 0000000092500000-0000000092500000
> Capabilities: [50] #0d [0000]
>
> 00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface
> Bridge (rev 01)
> Subsystem: Intel Corporation: Unknown device 4b42
> Flags: bus master, medium devsel, latency 0
> Capabilities: [e0] #09 [100c]
>
> 00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller
> (rev 01) (prog-if 8a [Master SecP PriP])
> Subsystem: Intel Corporation: Unknown device 4b42
> Flags: bus master, medium devsel, latency 0, IRQ 18
> I/O ports at <unassigned>
> I/O ports at <unassigned>
> I/O ports at <unassigned>
> I/O ports at <unassigned>
> I/O ports at 30b0 [size=16]
>
> 00:1f.2 IDE interface: Intel Corporation 82801GB/GR/GH (ICH7 Family) Serial
> ATA Storage Controllers cc=IDE (rev 01) (prog-if 8f [Master SecP SecO PriP
> PriO])
> Subsystem: Intel Corporation: Unknown device 4b42
> Flags: bus master, 66Mhz, medium devsel, latency 0, IRQ 20
> I/O ports at 30c8 [size=8]
> I/O ports at 30e4 [size=4]
> I/O ports at 30c0 [size=8]
> I/O ports at 30e0 [size=4]
> I/O ports at 30a0 [size=16]
> Memory at 92204000 (32-bit, non-prefetchable) [size=1K]
> Capabilities: [70] Power Management version 2
>
> 00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev
> 01)
> Subsystem: Intel Corporation: Unknown device 4b42
> Flags: medium devsel, IRQ 9
> I/O ports at 3000 [size=32]
>
> 01:00.0 VGA compatible controller: nVidia Corporation GeForce 6200
> TurboCache(TM) (rev a1) (prog-if 00 [VGA])
> Subsystem: nVidia Corporation: Unknown device 025d
> Flags: bus master, fast devsel, latency 0, IRQ 16
> Memory at 91000000 (32-bit, non-prefetchable) [size=16M]
> Memory at 80000000 (64-bit, prefetchable) [size=256M]
> Memory at 90000000 (64-bit, non-prefetchable) [size=16M]
> Capabilities: [60] Power Management version 2
> Capabilities: [68] Message Signalled Interrupts: 64bit+ Queue=0/0
> Enable-
> Capabilities: [78] #10 [0001]
>
> 04:00.0 Ethernet controller: Intel Corporation 82573V Gigabit Ethernet
> Controller (Copper) (rev 03)
> Subsystem: Intel Corporation: Unknown device 3083
> Flags: bus master, fast devsel, latency 0, IRQ 17
> Memory at 92100000 (32-bit, non-prefetchable) [size=128K]
> I/O ports at 2000 [size=32]
> Capabilities: [c8] Power Management version 2
> Capabilities: [d0] Message Signalled Interrupts: 64bit+ Queue=0/0
> Enable-
> Capabilities: [e0] #10 [0001]
>
> 05:00.0 Multimedia audio controller: Creative Labs SB Audigy (rev 04)
> Subsystem: Creative Labs SB Audigy 2 ZS (SB0350)
> Flags: bus master, medium devsel, latency 32, IRQ 22
> I/O ports at 1100 [size=64]
> Capabilities: [dc] Power Management version 2
>
> 05:00.1 Input device controller: Creative Labs SB Audigy MIDI/Game port (rev
> 04)
> Subsystem: Creative Labs SB Audigy MIDI/Game Port
> Flags: bus master, medium devsel, latency 32
> I/O ports at 1180 [size=8]
> Capabilities: [dc] Power Management version 2
>
> 05:00.2 FireWire (IEEE 1394): Creative Labs SB Audigy FireWire Port (rev 04)
> (prog-if 10 [OHCI])
> Subsystem: Creative Labs SB Audigy FireWire Port
> Flags: bus master, medium devsel, latency 32, IRQ 19
> Memory at 92008800 (32-bit, non-prefetchable) [size=2K]
> Memory at 92004000 (32-bit, non-prefetchable) [size=16K]
> Capabilities: [44] Power Management version 2
>
> 05:01.0 RAID bus controller: Silicon Image, Inc. PCI0680 Ultra ATA-133 Host
> Controller (rev 02)
> Subsystem: Silicon Image, Inc. Winic W-680 (Silicon Image 680 based)
> Flags: bus master, medium devsel, latency 32, IRQ 19
> I/O ports at 1178 [size=8]
> I/O ports at 1194 [size=4]
> I/O ports at 1170 [size=8]
> I/O ports at 1190 [size=4]
> I/O ports at 1150 [size=16]
> Memory at 92009500 (32-bit, non-prefetchable) [size=256]
> Expansion ROM at fff80000 [disabled] [size=512K]
> Capabilities: [60] Power Management version 2
>
> 05:02.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
> RTL-8139/8139C/8139C+ (rev 10)
> Subsystem: Realtek Semiconductor Co., Ltd. RT8139
> Flags: bus master, medium devsel, latency 32, IRQ 18
> I/O ports at 1000 [size=256]
> Memory at 92009400 (32-bit, non-prefetchable) [size=256]
> Expansion ROM at 92580000 [disabled] [size=64K]
> Capabilities: [50] Power Management version 2
>
> 05:04.0 FireWire (IEEE 1394): Texas Instruments TSB82AA2 IEEE-1394b Link Layer
> Controller (rev 01) (prog-if 10 [OHCI])
> Subsystem: Intel Corporation: Unknown device 4b42
> Flags: bus master, medium devsel, latency 32, IRQ 18
> Memory at 92008000 (32-bit, non-prefetchable) [size=2K]
> Memory at 92000000 (32-bit, non-prefetchable) [size=16K]
> Capabilities: [44] Power Management version 2
>
> 05:05.0 RAID bus controller: Silicon Image, Inc. SiI 3114 [SATALink/SATARaid]
> Serial ATA Controller (rev 02)
> Subsystem: Intel Corporation: Unknown device 7114
> Flags: bus master, 66Mhz, medium devsel, latency 32, IRQ 17
> I/O ports at 1168 [size=8]
> I/O ports at 118c [size=4]
> I/O ports at 1160 [size=8]
> I/O ports at 1188 [size=4]
> I/O ports at 1140 [size=16]
> Memory at 92009000 (32-bit, non-prefetchable) [size=1K]
> Expansion ROM at 92500000 [disabled] [size=512K]
> Capabilities: [60] Power Management version 2
>
>
> ---
> regards,
> Andreas
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Linux 2.6.16 - SATA read performance drop ~50% on Intel 82801GB/GR/GH
2006-04-11 23:36 Linux 2.6.16 - SATA read performance drop ~50% on Intel 82801GB/GR/GH Andreas Schnaiter
2006-04-12 3:57 ` Jeff Garzik
2006-04-12 21:22 ` Bill Davidsen
@ 2006-04-14 23:00 ` Linda Walsh
2 siblings, 0 replies; 5+ messages in thread
From: Linda Walsh @ 2006-04-14 23:00 UTC (permalink / raw)
To: Andreas Schnaiter; +Cc: linux-kernel
Andreas Schnaiter wrote:
> The two affected disks are connected to the Intel 82801GB/GR/GH (ICH7 Family)
> Serial ATA Controller.
> Disks on the Silicon Image/Intel IDE Controllers are not affected.
>
> Linux 2.6.15.7
> ---
> # time dd if=/benchfile of=/dev/null bs=1M
> 8192+0 records in, 8192+0 records out
> 8589934592 bytes (8.6 GB) copied, 130.547 seconds, 65.8 MB/s
> real 2m10.670s user 0m0.023s sys 0m14.238s
>
> Linux 2.6.16.2
> ---
> # time dd if=/benchfile of=/dev/null bs=1M
> 8192+0 records in, 8192+0 records out
> 8589934592 bytes (8.6 GB) copied, 302.452 seconds, 28.4 MB/s
> real 5m3.100s user 0m0.021s sys 0m40.521s
---
Slightly echoing Jeff G's question, but rephrasing for read,
could you try a read on the actual device? I.e. without
destroying your partition, you could try a direct read
from the device:
time dd if=/dev/sda of=/dev/null bs=1M count=8192.
BTW, how much memory do you have on the system?
Not that I have know much about block-i/o, but it
might narrow things down.
Have you tried the tests in single-user or run-level 1 to
help rule out other noise?
Linda
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2006-04-14 23:00 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2006-04-11 23:36 Linux 2.6.16 - SATA read performance drop ~50% on Intel 82801GB/GR/GH Andreas Schnaiter
2006-04-12 3:57 ` Jeff Garzik
2006-04-12 9:49 ` Jan Engelhardt
2006-04-12 21:22 ` Bill Davidsen
2006-04-14 23:00 ` Linda Walsh
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox