--- On Thu, 4/23/09, Thomas Pfaff <tpf...@tp76.info> wrote: > From: Thomas Pfaff <tpf...@tp76.info> > Subject: Problem with slow disk I/O > To: misc@openbsd.org > Received: Thursday, April 23, 2009, 9:27 AM > I'm getting horrible disk performance > compared to Ubuntu on my system. > > I noticed this when extracting ports.tar.gz on the same > machine with > different OSs (this is something I did a while back to > check for > a possible hardware problem when OpenBSD crashed upon > extracting > ports.tar.gz). > > OpenBSD (ffs): > > $ time tar -zxf ports.tar.gz > 0m59.90s real 0m1.00s user > 0m6.95s system > > Ubuntu (ext3): > > $ time tar -zxf ports.tar.gz > real 0m18.440s > user 0m1.212s > sys 0m2.596s > > 1 minute on OpenBSD and 18.5 seconds on Ubuntu, doing the > exact same > thing on the exact same hardware! Why the huge > difference? Both are > default installations, except softdep is turned on. > > Thanks for any pointers or advice. > > Thomas > > OpenBSD 4.5-current (GENERIC.MP) #13: Thu Apr 23 13:00:36 > CEST 2009 > tpf...@ws.tp76.info:/usr/src/sys/arch/amd64/compile/GENERIC.MP > real mem = 3152609280 (3006MB) > avail mem = 3045097472 (2904MB) > mainbus0 at root > bios0 at mainbus0: SMBIOS rev. 2.4 @ 0xf06b0 (76 entries) > bios0: vendor American Megatrends Inc. version "1704" date > 11/27/2007 > bios0: ASUSTeK Computer INC. P5B-E > acpi0 at bios0: rev 2 > acpi0: tables DSDT FACP APIC MCFG OEMB HPET > acpi0: wakeup devices P0P2(S4) P0P1(S4) UAR1(S4) PS2K(S4) > PS2M(S4) EUSB(S4) USBE(S4) P0P4(S4) P0P5(S4) P0P6(S4) > P0P7(S4) P0P8(S4) P0P9(S4) USB0(S4) USB1(S4) USB2(S4) > USB3(S4) USB4(S4) USB5(S4) > acpitimer0 at acpi0: 3579545 Hz, 24 bits > acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat > cpu0 at mainbus0: apid 0 (boot processor) > cpu0: Intel(R) Core(TM)2 CPU 6400 @ 2.13GHz, 2135.29 MHz > cpu0: > FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUS H,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,SSE3,MWAIT,DS-CPL,VMX,EST,TM2,CX16, xTPR,NXE,LONG > cpu0: 2MB 64b/line 8-way L2 cache > cpu0: apic clock running at 266MHz > cpu1 at mainbus0: apid 1 (application processor) > cpu1: Intel(R) Core(TM)2 CPU 6400 @ 2.13GHz, 2135.04 MHz > cpu1: > FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUS H,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,SSE3,MWAIT,DS-CPL,VMX,EST,TM2,CX16, xTPR,NXE,LONG > cpu1: 2MB 64b/line 8-way L2 cache > ioapic0 at mainbus0 apid 2 pa 0xfec00000, version 20, 24 > pins > acpihpet0 at acpi0: 14318179 Hz > acpiprt0 at acpi0: bus 0 (PCI0) > acpiprt1 at acpi0: bus 1 (P0P2) > acpiprt2 at acpi0: bus 5 (P0P1) > acpiprt3 at acpi0: bus 4 (P0P4) > acpiprt4 at acpi0: bus -1 (P0P5) > acpiprt5 at acpi0: bus -1 (P0P6) > acpiprt6 at acpi0: bus 3 (P0P7) > acpiprt7 at acpi0: bus 2 (P0P8) > acpicpu0 at acpi0 > acpicpu1 at acpi0 > acpibtn0 at acpi0: PWRB > pci0 at mainbus0 bus 0 > pchb0 at pci0 dev 0 function 0 "Intel 82G965 Host" rev > 0x02 > ppb0 at pci0 dev 1 function 0 "Intel 82G965 PCIE" rev 0x02: > apic 2 int 16 (irq 11) > pci1 at ppb0 bus 1 > mem address conflict 0xc0000000/0x10000000 > vga1 at pci1 dev 0 function 0 "NVIDIA GeForce 7600 GT" rev > 0xa1 > wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation) > wsdisplay0: screen 1-5 added (80x25, vt100 emulation) > uhci0 at pci0 dev 26 function 0 "Intel 82801H USB" rev > 0x02: apic 2 int 16 (irq 11) > uhci1 at pci0 dev 26 function 1 "Intel 82801H USB" rev > 0x02: apic 2 int 17 (irq 5) > ehci0 at pci0 dev 26 function 7 "Intel 82801H USB" rev > 0x02: apic 2 int 18 (irq 15) > usb0 at ehci0: USB revision 2.0 > uhub0 at usb0 "Intel EHCI root hub" rev 2.00/1.00 addr 1 > azalia0 at pci0 dev 27 function 0 "Intel 82801H HD Audio" > rev 0x02: apic 2 int 22 (irq 3) > azalia0: codecs: Analog Devices AD1988A > audio0 at azalia0 > ppb1 at pci0 dev 28 function 0 "Intel 82801H PCIE" rev > 0x02: apic 2 int 16 (irq 11) > pci2 at ppb1 bus 4 > ppb2 at pci0 dev 28 function 3 "Intel 82801H PCIE" rev > 0x02: apic 2 int 19 (irq 10) > pci3 at ppb2 bus 3 > age0 at pci3 dev 0 function 0 "Attansic Technology L1" rev > 0xb0: apic 2 int 19 (irq 10), address 00:18:f3:9d:7d:04 > atphy0 at age0 phy 0: F1 10/100/1000 PHY, rev. 5 > ppb3 at pci0 dev 28 function 4 "Intel 82801H PCIE" rev > 0x02: apic 2 int 16 (irq 11) > pci4 at ppb3 bus 2 > jmb0 at pci4 dev 0 function 0 "JMicron JMB363 IDE/SATA" rev > 0x02 > ahci0 at jmb0: apic 2 int 16 (irq 11), AHCI 1.0 > scsibus0 at ahci0: 32 targets > pciide0 at jmb0: DMA, channel 0 wired to native-PCI, > channel 1 wired to native-PCI > pciide0: using apic 2 int 16 (irq 11) for native-PCI > interrupt > atapiscsi0 at pciide0 channel 0 drive 0 > scsibus1 at atapiscsi0: 2 targets > cd0 at scsibus1 targ 0 lun 0: <PLEXTOR, DVDR PX-740A, > 1.00> ATAPI 5/cdrom removable > cd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2 > pciide0: channel 1 disabled (no drives) > uhci2 at pci0 dev 29 function 0 "Intel 82801H USB" rev > 0x02: apic 2 int 23 (irq 7) > uhci3 at pci0 dev 29 function 1 "Intel 82801H USB" rev > 0x02: apic 2 int 19 (irq 10) > uhci4 at pci0 dev 29 function 2 "Intel 82801H USB" rev > 0x02: apic 2 int 18 (irq 15) > ehci1 at pci0 dev 29 function 7 "Intel 82801H USB" rev > 0x02: apic 2 int 23 (irq 7) > usb1 at ehci1: USB revision 2.0 > uhub1 at usb1 "Intel EHCI root hub" rev 2.00/1.00 addr 1 > ppb4 at pci0 dev 30 function 0 "Intel 82801BA Hub-to-PCI" > rev 0xf2 > pci5 at ppb4 bus 5 > re0 at pci5 dev 2 function 0 "D-Link Systems DGE-528T" rev > 0x10: RTL8169/8110SB (0x1000), apic 2 int 23 (irq 7), > address 00:21:91:12:15:03 > rgephy0 at re0 phy 7: RTL8169S/8110S PHY, rev. 3 > pcib0 at pci0 dev 31 function 0 "Intel 82801H LPC" rev > 0x02 > pciide1 at pci0 dev 31 function 2 "Intel 82801H SATA" rev > 0x02: DMA, channel 0 configured to native-PCI, channel 1 > configured to native-PCI > pciide1: using apic 2 int 19 (irq 10) for native-PCI > interrupt > wd0 at pciide1 channel 0 drive 0: <SAMSUNG HD321KJ> > wd0: 16-sector PIO, LBA48, 305245MB, 625142448 sectors > wd0(pciide1:0:0): using PIO mode 4, Ultra-DMA mode 5 > ichiic0 at pci0 dev 31 function 3 "Intel 82801H SMBus" rev > 0x02: apic 2 int 18 (irq 10) > iic0 at ichiic0 > spdmem0 at iic0 addr 0x50: 1GB DDR2 SDRAM non-parity > PC2-5300CL5 > spdmem1 at iic0 addr 0x51: 1GB DDR2 SDRAM non-parity > PC2-5300CL5 > spdmem2 at iic0 addr 0x52: 1GB DDR2 SDRAM non-parity > PC2-5300CL5 > spdmem3 at iic0 addr 0x53: 1GB DDR2 SDRAM non-parity > PC2-5300CL5 > pciide2 at pci0 dev 31 function 5 "Intel 82801H SATA" rev > 0x02: DMA, channel 0 wired to native-PCI, channel 1 wired to > native-PCI > pciide2: using apic 2 int 19 (irq 10) for native-PCI > interrupt > usb2 at uhci0: USB revision 1.0 > uhub2 at usb2 "Intel UHCI root hub" rev 1.00/1.00 addr 1 > usb3 at uhci1: USB revision 1.0 > uhub3 at usb3 "Intel UHCI root hub" rev 1.00/1.00 addr 1 > usb4 at uhci2: USB revision 1.0 > uhub4 at usb4 "Intel UHCI root hub" rev 1.00/1.00 addr 1 > usb5 at uhci3: USB revision 1.0 > uhub5 at usb5 "Intel UHCI root hub" rev 1.00/1.00 addr 1 > usb6 at uhci4: USB revision 1.0 > uhub6 at usb6 "Intel UHCI root hub" rev 1.00/1.00 addr 1 > isa0 at pcib0 > isadma0 at isa0 > pckbc0 at isa0 port 0x60/5 > pckbd0 at pckbc0 (kbd slot) > pckbc0: using irq 1 for kbd slot > wskbd0 at pckbd0: console keyboard, using wsdisplay0 > pcppi0 at isa0 port 0x61 > midi0 at pcppi0: <PC speaker> > spkr0 at pcppi0 > wbsio0 at isa0 port 0x2e/2: W83627DHG rev 0x23 > lm1 at wbsio0 port 0x290/8: W83627DHG > mtrr: Pentium Pro MTRR support > uhidev0 at uhub6 port 2 configuration 1 interface 0 > "Logitech USB-PS/2 Optical Mouse" rev 2.00/20.00 addr 2 > uhidev0: iclass 3/1 > ums0 at uhidev0: 3 buttons, Z dir > wsmouse0 at ums0 mux 0 > ugen0 at uhub5 port 2 "American Power Conversion Back-UPS > CS 500 FW:808.q8.I USB FW:q8" rev 1.10/0.06 addr 2 > uscanner0 at uhub2 port 1 configuration 1 interface 0 "AGFA > SNAPSCAN 1212U" rev 1.00/1.20 addr 2 > softraid0 at root > root on wd0a swap on wd0b dump on wd0b
I assure you that this is only pointing towards the layout of the EXT3 file system in comparison to UFS/FFS and the aggressive buffer cache on the GNU/Linux system which softdep cannot compete with. On OpenBSD you are just seeing a closer representation of the actual disk I/O bottlenecks. The UBC question was interesting and I'm hoping to get an answer to it. ;) --- James A. Peltier james_a_pelt...@yahoo.ca __________________________________________________________________ Make your browsing faster, safer, and easier with the new Internet Explorer. 8. Optimized for Yahoo! Get it Now for Free! at http://downloads.yahoo.com/ca/internetexplorer/
