Messages in this thread | | | From | Bill Davidsen <> | Subject | Re: Linux 2.6.16 - SATA read performance drop ~50% on Intel 82801GB/GR/GH | Date | Wed, 12 Apr 2006 17:22:12 -0400 |
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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
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