Unfortunately, even after new kernel build with version 1.27 of
sys/kern/vfs_biomem.c issue with `softdep' persists.
dmesg output:
OpenBSD 5.3-current (GENERIC.MP) #0: Fri Jun 28 00:20:42
...
bios0 at mainbus0: SMBIOS rev. 2.5 @ 0xe0010 (44 entries)
bios0: vendor LENOVO version 6JET93WW (1.51 ) date 03/26/2012
bios0: LENOVO 28477TG
...
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Core(TM)2 Duo CPU T6570 @ 2.10GHz, 2095.09 MHz
cpu0:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,XSAVE,NXE,LONG,LAHF,PERF
cpu0: 2MB 64b/line 8-way L2 cache
cpu0: smt 0, core 0, package 0
cpu0: apic clock running at 199MHz
cpu1 at mainbus0: apid 1 (application processor)
cpu1: Intel(R) Core(TM)2 Duo CPU T6570 @ 2.10GHz, 2094.76 MHz
cpu1:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,XSAVE,NXE,LONG,LAHF,PERF
cpu1: 2MB 64b/line 8-way L2 cache
cpu1: smt 0, core 1, package 0
ioapic0 at mainbus0: apid 2 pa 0xfec0, version 20, 24 pins
...
cpu0: Enhanced SpeedStep 2095 MHz: speeds: 2101, 2100, 1600, 1200 MHz
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 Intel GM45 Host rev 0x07
...
azalia0 at pci0 dev 27 function 0 Intel 82801I HD Audio rev 0x03: msi
azalia0: codecs: Realtek ALC269, Intel/0x2802, using Realtek ALC269
audio0 at azalia0
ppb0 at pci0 dev 28 function 0 Intel 82801I PCIE rev 0x03: msi
pci1 at ppb0 bus 2
JMicron SD/MMC rev 0x00 at pci1 dev 0 function 0 not configured
sdhc0 at pci1 dev 0 function 2 JMicron SD Host Controller rev 0x00: apic
2 int 16
sdmmc0 at sdhc0
JMicron Memory Stick rev 0x00 at pci1 dev 0 function 3 not configured
JMicron xD rev 0x00 at pci1 dev 0 function 4 not configured
ppb1 at pci0 dev 28 function 1 Intel 82801I PCIE rev 0x03: msi
pci2 at ppb1 bus 3
ppb2 at pci0 dev 28 function 2 Intel 82801I PCIE rev 0x03: msi
pci3 at ppb2 bus 4
ppb3 at pci0 dev 28 function 3 Intel 82801I PCIE rev 0x03: msi
pci4 at ppb3 bus 5
Realtek 8192SE rev 0x10 at pci4 dev 0 function 0 not configured
ppb4 at pci0 dev 28 function 4 Intel 82801I PCIE rev 0x03: msi
pci5 at ppb4 bus 6
ppb5 at pci0 dev 28 function 5 Intel 82801I PCIE rev 0x03: msi
pci6 at ppb5 bus 8
...
ppb6 at pci0 dev 30 function 0 Intel 82801BAM Hub-to-PCI rev 0x93
pci7 at ppb6 bus 9
pcib0 at pci0 dev 31 function 0 Intel 82801IBM LPC rev 0x03
ahci0 at pci0 dev 31 function 2 Intel 82801I AHCI rev 0x03: msi, AHCI 1.2
scsibus0 at ahci0: 32 targets
sd0 at scsibus0 targ 0 lun 0: ATA, Hitachi HTS54757, JE4O SCSI3 0/direct
fixed naa.5000cca63fc2c8ee
sd0: 715404MB, 512 bytes/sector, 1465149168 sectors
cd0 at scsibus0 targ 1 lun 0: HL-DT-ST, DVDRAM GT30N, LG09 ATAPI 5/cdrom
removable
ichiic0 at pci0 dev 31 function 3 Intel 82801I SMBus rev 0x03: apic 2 int
19
iic0 at ichiic0
spdmem0 at iic0 addr 0x50: 2GB DDR3 SDRAM PC3-8500 SO-DIMM
...
isa0 at pcib0
isadma0 at isa0
...
mtrr: Pentium Pro MTRR support
vscsi0 at root
scsibus1 at vscsi0: 256 targets
softraid0 at root
scsibus2 at softraid0: 256 targets
root on sd0a (0441f60ac76c6254.a) swap on sd0b dump on sd0b
- snip ---
/etc/fstab
0441f60ac76c6254.b none swap sw
0441f60ac76c6254.a / ffs rw,softdep 1 1
0441f60ac76c6254.m /home ffs rw,nodev,nosuid,softdep 1 2
0441f60ac76c6254.d /tmp ffs rw,nodev,nosuid,softdep 1 2
0441f60ac76c6254.f /usr ffs rw,nodev,softdep 1 2
0441f60ac76c6254.g /usr/X11R6 ffs rw,nodev,softdep 1 2
0441f60ac76c6254.h /usr/local ffs rw,nodev,softdep 1 2
0441f60ac76c6254.l /usr/obj ffs rw,nodev,nosuid,softdep 1 2
0441f60ac76c6254.k /usr/src ffs rw,nodev,softdep 1 2
0441f60ac76c6254.e /var ffs rw,nodev,softdep 1 2
Any idea why softdep hogs / limits simultaneous didk access ?
2013/6/27 Bob Beck b...@openbsd.org
Update to something that has version 1.27 of sys/kern/vfs_biomem.c and tell
me if you still have the issue.
On Wed, Jun 26, 2013 at 4:35 AM, Tori Mus torimus...@gmail.com wrote:
Hi,
I'm running current snapshot of OpenBSD on amd64 architecture, MP kernel
(Lenovo Thinkpad to be concrete). Based on the official docs tried to
tune
disk performance by adding `softdep' mounting option for ffs slices.
After updating of /etc/fstab and clean reboot, checked all particular
slices like /home, /usr etc. are really mounted with softdep.
The issue is about much worse performance then with the default
nosoftdep.
Now, for example, when extracting ports.tar.gz snapshot in /usr, other
process cann't open even small files without very long delays like vi
$HOME/.profile takes about 2 minutes whereas cpu usage shown with top is
about 5% only ! Turning off softdep redeems the access time of the
previous example to about 4 seconds.
I've searched mailing lists and read about softdep regression on OpenBSD
4.8 that was later fixed. Is this regression back. Does anybody else
