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Old 13th February 2014
drm drm is offline
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Default SSD disk speed

Hi,

i use (the latest) openbsd current on my desktop, and have a samsung 830 ssd with 256 GB as my system disk (including /home). Here's the disklabel:

Code:
# /dev/rsd0c:
type: SCSI
disk: SCSI disk
label: SAMSUNG SSD 830
duid: XXX
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 255
sectors/cylinder: 16065
cylinders: 31130
total sectors: 500118192
boundstart: 64
boundend: 335544384
drivedata: 0
16 partitions:
#                size           offset  fstype [fsize bsize  cpg]
  a:          2104448               64  4.2BSD   2048 16384    1 # /
  b:          9430158          2104512    swap                   # none
  c:        500118192                0  unused
  d:         41945696         11534688  4.2BSD   2048 16384    1 # /usr
  e:         62910528         53480384  4.2BSD   2048 16384    1 # /usr/local
  f:          4192960        116390912  4.2BSD   2048 16384    1 # /var
  g:          2088448        120583872  4.2BSD   2048 16384    1 # /tmp
  h:        212872064        122672320  4.2BSD   2048 16384    1 # /home
and MBR layout:

Code:
Disk: sd0       geometry: 31130/255/63 [500118192 Sectors]
Offset: 0       Signature: 0xAA55
            Starting         Ending         LBA Info:
 #: id      C   H   S -      C   H   S [       start:        size ]
-------------------------------------------------------------------------------
 0: 00      0   0   0 -      0   0   0 [           0:           0 ] unused
 1: 00      0   0   0 -      0   0   0 [           0:           0 ] unused
 2: 00      0   0   0 -      0   0   0 [           0:           0 ] unused
*3: A6      0   1   2 -  20886 171  21 [          64:   335544320 ] OpenBSD
Edit: forgot /etc/fstab:

Code:
XXX.b none swap sw
XXX.a / ffs rw,softdep 1 1
XXX.g /tmp ffs rw,softdep,nodev,nosuid 1 2
XXX.d /usr ffs rw,softdep,nodev 1 2
XXX.e /usr/local ffs rw,softdep,nodev 1 2
XXX.f /var ffs rw,softdep,nodev,nosuid 1 2
XXX.h /home ffs rw,softdep,nodev,nosuid 1 2
/dev/sd1d /multimedia ffs ro,nodev,nosuid,softdep 1 2
I have the impression, that the ssd is not as fast as i would expect it to be, e.g. launching libreoffice still takes 5-6 seconds (with cpu on max speed, i.e. 2,8 GHz). Granted, my hardware is from 2011, but i think it should perform a bit better. OTOH, when i upgrade to a newer snapshot, i download the files in advance to "/5.5/amd64" and run the update directly from the ssd; unpacking the tarballs then feels very fast.

Of course disk read/write speed numbers would be much better than feelings, and checking ports, i found some (old) disk benchmarking tools -- but i don't know which tool(s) is appropriate for the job. Can you recommend some? I also thought about alingment errors in my partition layout, resulting in / being fast, but /usr and /home to be slower. If you spot any obvious flaw, please let me know.

Thanks in advance,
drm

obligatory dmesg:

Code:
OpenBSD 5.5-beta (GENERIC.MP) #287: Fri Feb  7 11:45:09 MST 2014
    todd@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 3738107904 (3564MB)
avail mem = 3630379008 (3462MB)
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.4 @ 0xf0100 (61 entries)
bios0: vendor Award Software International, Inc. version "F4" date 07/28/2010
bios0: Gigabyte Technology Co., Ltd. GA-880GMA-UD2H
acpi0 at bios0: rev 0
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP SSDT HPET MCFG MATS APIC
acpi0: wakeup devices USB0(S3) USB1(S3) USB2(S3) USB3(S3) USB4(S3) USB5(S3) USB6(S3) SBAZ(S4) PEX0(S5) PEX1(S5) PEX2(S5) PEX3(S5) P2P_(S5) PCE2(S4) PCE3(S4) PCE4(S4) [...]
acpitimer0 at acpi0: 3579545 Hz, 32 bits
acpihpet0 at acpi0: 14318180 Hz
acpimcfg0 at acpi0 addr 0xe0000000, bus 0-255
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: AMD Athlon(tm) II X2 240e Processor, 11252.13 MHz
cpu0: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,MWAIT,CX16,POPCNT,NXE,MMXX,FFXSR,LONG,3DNOW2,3DNOW,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,SKINIT,ITSC
cpu0: 64KB 64b/line 2-way I-cache, 64KB 64b/line 2-way D-cache, 1MB 64b/line 16-way L2 cache
cpu0: ITLB 32 4KB entries fully associative, 16 4MB entries fully associative
cpu0: DTLB 48 4KB entries fully associative, 48 4MB entries fully associative
cpu0: AMD erratum 721 detected and fixed
cpu0: smt 0, core 0, package 0
mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges
cpu0: apic clock running at 200MHz
cpu0: mwait min=64, max=64, C-substates=0.0.0.0.0, IBE
cpu1 at mainbus0: apid 1 (application processor)
cpu1: AMD Athlon(tm) II X2 240e Processor, 2812.92 MHz
cpu1: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,MWAIT,CX16,POPCNT,NXE,MMXX,FFXSR,LONG,3DNOW2,3DNOW,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,SKINIT,ITSC
cpu1: 64KB 64b/line 2-way I-cache, 64KB 64b/line 2-way D-cache, 1MB 64b/line 16-way L2 cache
cpu1: ITLB 32 4KB entries fully associative, 16 4MB entries fully associative
cpu1: DTLB 48 4KB entries fully associative, 48 4MB entries fully associative
cpu1: AMD erratum 721 detected and fixed
cpu1: smt 0, core 1, package 0
ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 21, 24 pins
ioapic0: misconfigured as apic 0, remapped to apid 2
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus 5 (PEX0)
acpiprt2 at acpi0: bus 6 (PEX1)
acpiprt3 at acpi0: bus -1 (PEX2)
acpiprt4 at acpi0: bus -1 (PEX3)
acpiprt5 at acpi0: bus 4 (P2P_)
acpiprt6 at acpi0: bus -1 (PCE2)
acpiprt7 at acpi0: bus -1 (PCE3)
acpiprt8 at acpi0: bus -1 (PCE4)
acpiprt9 at acpi0: bus -1 (PCE5)
acpiprt10 at acpi0: bus -1 (PCE6)
acpiprt11 at acpi0: bus -1 (PCE7)
acpiprt12 at acpi0: bus 2 (PCE9)
acpiprt13 at acpi0: bus 3 (PCEA)
acpiprt14 at acpi0: bus -1 (PCEB)
acpiprt15 at acpi0: bus -1 (PCEC)
acpiprt16 at acpi0: bus 1 (AGP_)
acpicpu0 at acpi0: PSS
acpicpu1 at acpi0: PSS
acpibtn0 at acpi0: PWRB
cpu0: 11252 MHz: speeds: 2800 2100 1600 800 MHz
pci0 at mainbus0 bus 0
0:0:0: mem address conflict 0xe0000000/0x20000000
pchb0 at pci0 dev 0 function 0 "AMD RS880 Host" rev 0x00
ppb0 at pci0 dev 1 function 0 "AMD RS780 PCIE" rev 0x00
pci1 at ppb0 bus 1
radeondrm0 at pci1 dev 5 function 0 "ATI Radeon HD 4250" rev 0x00
drm0 at radeondrm0
radeondrm0: apic 2 int 18
azalia0 at pci1 dev 5 function 1 "ATI Radeon HD 4200 HD Audio" rev 0x00: msi
azalia0: no supported codecs
ppb1 at pci0 dev 9 function 0 "AMD RS780 PCIE" rev 0x00: msi
pci2 at ppb1 bus 2
"NEC xHCI" rev 0x03 at pci2 dev 0 function 0 not configured
ppb2 at pci0 dev 10 function 0 "AMD RS780 PCIE" rev 0x00: msi
pci3 at ppb2 bus 3
re0 at pci3 dev 0 function 0 "Realtek 8168" rev 0x03: RTL8168D/8111D (0x2800), msi, address XXX
rgephy0 at re0 phy 7: RTL8169S/8110S PHY, rev. 2
ahci0 at pci0 dev 17 function 0 "ATI SBx00 SATA" rev 0x40: apic 2 int 19, AHCI 1.2
scsibus0 at ahci0: 32 targets
sd0 at scsibus0 targ 0 lun 0: <ATA, SAMSUNG SSD 830, CXM0> SCSI3 0/direct fixed naa.5002538043584d30
sd0: 244198MB, 512 bytes/sector, 500118192 sectors, thin
sd1 at scsibus0 targ 1 lun 0: <ATA, WDC WD10EADS-19M, 01.0> SCSI3 0/direct fixed naa.50014ee25a2d138a
sd1: 953869MB, 512 bytes/sector, 1953525168 sectors
cd0 at scsibus0 targ 4 lun 0: <Optiarc, DVD RW AD-7260S, 1.03> ATAPI 5/cdrom removable
ohci0 at pci0 dev 18 function 0 "ATI SB700 USB" rev 0x00: apic 2 int 18, version 1.0, legacy support
ehci0 at pci0 dev 18 function 2 "ATI SB700 USB2" rev 0x00: apic 2 int 17
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 "ATI EHCI root hub" rev 2.00/1.00 addr 1
ohci1 at pci0 dev 19 function 0 "ATI SB700 USB" rev 0x00: apic 2 int 18, version 1.0, legacy support
ehci1 at pci0 dev 19 function 2 "ATI SB700 USB2" rev 0x00: apic 2 int 17
usb1 at ehci1: USB revision 2.0
uhub1 at usb1 "ATI EHCI root hub" rev 2.00/1.00 addr 1
piixpm0 at pci0 dev 20 function 0 "ATI SBx00 SMBus" rev 0x41: polling
iic0 at piixpm0
spdmem0 at iic0 addr 0x50: 2GB DDR3 SDRAM PC3-10600
spdmem1 at iic0 addr 0x51: 2GB DDR3 SDRAM PC3-10600
azalia1 at pci0 dev 20 function 2 "ATI SBx00 HD Audio" rev 0x40: apic 2 int 16
azalia1: codecs: Realtek/0x0892
audio0 at azalia1
pcib0 at pci0 dev 20 function 3 "ATI SB700 ISA" rev 0x40
ppb3 at pci0 dev 20 function 4 "ATI SB600 PCI" rev 0x40
pci4 at ppb3 bus 4
ath0 at pci4 dev 6 function 0 "Atheros AR2413" rev 0x01: apic 2 int 20
ath0: AR2413 7.8 phy 4.5 rf 5.6, FCC2A*, address XXX
ohci2 at pci0 dev 20 function 5 "ATI SB700 USB" rev 0x00: apic 2 int 18, version 1.0, legacy support
ppb4 at pci0 dev 21 function 0 "ATI SB800 PCIE" rev 0x00: msi
pci5 at ppb4 bus 5
jmb0 at pci5 dev 0 function 0 "JMicron JMB368 IDE" rev 0x00
pciide0 at jmb0: DMA, channel 0 wired to native-PCI, channel 1 wired to native-PCI
pciide0: using apic 2 int 17 for native-PCI interrupt
pciide0: channel 0 disabled (no drives)
pciide0: channel 1 disabled (no drives)
ppb5 at pci0 dev 21 function 1 "ATI SB800 PCIE" rev 0x00: msi
pci6 at ppb5 bus 6
ohci3 at pci0 dev 22 function 0 "ATI SB700 USB" rev 0x00: apic 2 int 18, version 1.0, legacy support
ehci2 at pci0 dev 22 function 2 "ATI SB700 USB2" rev 0x00: apic 2 int 17
usb2 at ehci2: USB revision 2.0
uhub2 at usb2 "ATI EHCI root hub" rev 2.00/1.00 addr 1
pchb1 at pci0 dev 24 function 0 "AMD AMD64 10h HyperTransport" rev 0x00
pchb2 at pci0 dev 24 function 1 "AMD AMD64 10h Address Map" rev 0x00
pchb3 at pci0 dev 24 function 2 "AMD AMD64 10h DRAM Cfg" rev 0x00
km0 at pci0 dev 24 function 3 "AMD AMD64 10h Misc Cfg" rev 0x00
pchb4 at pci0 dev 24 function 4 "AMD AMD64 10h Link Cfg" rev 0x00
usb3 at ohci0: USB revision 1.0
uhub3 at usb3 "ATI OHCI root hub" rev 1.00/1.00 addr 1
usb4 at ohci1: USB revision 1.0
uhub4 at usb4 "ATI OHCI root hub" rev 1.00/1.00 addr 1
isa0 at pcib0
isadma0 at isa0
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
it0 at isa0 port 0x2e/2: IT8720F rev 8, EC port 0x228
usb5 at ohci2: USB revision 1.0
uhub5 at usb5 "ATI OHCI root hub" rev 1.00/1.00 addr 1
usb6 at ohci3: USB revision 1.0
uhub6 at usb6 "ATI OHCI root hub" rev 1.00/1.00 addr 1
umass0 at uhub1 port 5 configuration 1 interface 0 "Generic Mass Storage Device" rev 2.00/1.00 addr 2
umass0: using SCSI over Bulk-Only
scsibus1 at umass0: 2 targets, initiator 0
sd2 at scsibus1 targ 1 lun 0: <Generic-, SD/MMC, 1.00> SCSI0 0/direct removable
sd3 at scsibus1 targ 1 lun 1: <Generic-, Compact Flash, 1.01> SCSI0 0/direct removable
sd4 at scsibus1 targ 1 lun 2: <Generic-, SM/xD-Picture, 1.02> SCSI0 0/direct removable
sd5 at scsibus1 targ 1 lun 3: <Generic-, MS/MS-Pro, 1.03> SCSI0 0/direct removable
uhidev0 at uhub4 port 1 configuration 1 interface 0 "Logitech USB-PS/2 Optical Mouse" rev 2.00/21.00 addr 2
uhidev0: iclass 3/1
ums0 at uhidev0: 8 buttons, Z dir
wsmouse0 at ums0 mux 0
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
root on sd0a (6de79c244a03d47a.a) swap on sd0b dump on sd0b
drm: initializing kernel modesetting (RS880 0x1002:0x9715 0x1458:0xD000).
radeondrm0: VRAM: 512M 0x00000000C0000000 - 0x00000000DFFFFFFF (512M used)
radeondrm0: GTT: 512M 0x00000000A0000000 - 0x00000000BFFFFFFF
ttm_pool_mm_shrink_init stub
drm: PCIE GART of 512M enabled (table at 0x00000000C0040000).
radeondrm0: 1680x1050
wsdisplay0 at radeondrm0 mux 1: console (std, vt100 emulation), using wskbd0
wsdisplay0: screen 1-5 added (std, vt100 emulation)
acpi0: PM1 stuck (en 0x121 st 0x1), clearing
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Old 14th February 2014
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Oko Oko is offline
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I installed OpenBSD 5.4 amd64 about 3-4 months ago on new computing node we got at work with 64 cores, 256GB RAM and of course SSD. The disk performance was abysmal. It took literally 5 minutes to move ports tar ball from tmp to /usr. Since the server had to go quickly into production I had no stamina to do anything OpenBSD related so I just put RedHat on it. For the record entire core network infrastructure in my Lab runs OpenBSD.
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Old 14th February 2014
J65nko J65nko is offline
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softdep is not the only mount option that can speed up disk access. There is also an option called noatime.
From mount(8)
Code:
noatime
        Do not update atime on files in the system unless the
        mtime or ctime is being changed as well.  This option is
        useful for laptops and news servers where one does not
        want the extra disk activity associated with updating the
        atime.
With an SSD disk it probably will not make much difference, but with "spinning rust" disks it makes a difference.
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Old 14th February 2014
drm drm is offline
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Thank you both for your answers.

So i guess it's the fault of ffs then? Are there any reliable tools for access speed measuring?

drm
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