Thread: SSD disk speed
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Old 13th February 2014
drm drm is offline
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Join Date: Sep 2012
Posts: 8
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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