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List: linaro-flashbench-results
Subject: [Flashbench] Lexar Professional CF 400x 16GB
From: arnd () arndb ! de (Arnd Bergmann)
Date: 2011-08-06 22:17:02
Message-ID: 1650958.T4Tx1iZI36 () wuerfel
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arnd at wuerfel:~/flashbench$ sudo hdparm -I /dev/sde
/dev/sde:
CompactFlash ATA device
Model Number: LEXAR ATA FLASH CARD
Serial Number: 41163033400000500C93
Firmware Revision: 20100407
Standards:
Likely used: 6
Configuration:
Logical max current
cylinders 31012 31012
heads 16 16
sectors/track 63 63
--
CHS current addressable sectors: 31260096
LBA user addressable sectors: 31260096
Logical/Physical Sector size: 512 bytes
device size with M = 1024*1024: 15263 MBytes
device size with M = 1000*1000: 16005 MBytes (16 GB)
cache/buffer size = 1 KBytes (type=DualPort)
Capabilities:
LBA, IORDY(can be disabled)
bytes avail on r/w long: 4
Standby timer values: spec'd by Vendor
R/W multiple sector transfer: Max = 1 Current = 0
Advanced power management level: disabled
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5 udma6
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
Power Management feature set
Write cache
WRITE_BUFFER command
READ_BUFFER command
NOP cmd
CFA feature set
Advanced Power Management feature set
Mandatory FLUSH_CACHE
* Gen1 signaling speed (1.5Gb/s)
* Host-initiated interface power management
* CFA advanced modes: pio5 *pio6 mdma3 mdma4
* CFA Power Level 1 (max 500mA)
Integrity word not set (found 0xbb00, expected 0x89a5)
arnd at wuerfel:~/flashbench$ sudo hdparm -i /dev/sde
/dev/sde:
Model=LEXAR ATA FLASH CARD, FwRev=20100407, SerialNo=41163033400000500C93
Config={ HardSect NotMFM Removeable DTR>10Mbs nonMagnetic }
RawCHS=31012/16/63, TrkSize=0, SectSize=576, ECCbytes=4
BuffType=DualPort, BuffSize=1kB, MaxMultSect=1, MultSect=off
CurCHS=31012/16/63, CurSects=31260096, LBA=yes, LBAsects=31260096
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5 udma6
AdvancedPM=yes: disabled (255) WriteCache=disabled
arnd at wuerfel:~/flashbench$ sudo fdisk -lu /dev/sde
Disk /dev/sde: 16.0 GB, 16005169152 bytes
256 heads, 63 sectors/track, 1938 cylinders, total 31260096 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sde1 * 63 31259087 15629512+ b W95 FAT32
arnd at wuerfel:~/flashbench$ sudo ./flashbench -a /dev/sde --blocksize=1024 \
--count=32 align 2147483648 pre 248?s on 373?s post 256?s \
diff 121?s align 1073741824 pre 248?s on 370?s post 252?s \
diff 120?s align 536870912 pre 247?s on 368?s post 251?s diff 119?s
align 268435456 pre 246?s on 368?s post 251?s diff 119?s
align 134217728 pre 246?s on 368?s post 251?s diff 120?s
align 67108864 pre 244?s on 367?s post 249?s diff 121?s
align 33554432 pre 247?s on 370?s post 253?s diff 119?s
align 16777216 pre 256?s on 378?s post 253?s diff 124?s
align 8388608 pre 263?s on 288?s post 255?s diff 28.8?s
align 4194304 pre 263?s on 289?s post 255?s diff 29.3?s
align 2097152 pre 260?s on 286?s post 254?s diff 28.4?s
align 1048576 pre 262?s on 288?s post 256?s diff 28.8?s
align 524288 pre 263?s on 289?s post 257?s diff 28.7?s
align 262144 pre 262?s on 287?s post 255?s diff 28.4?s
align 131072 pre 260?s on 285?s post 260?s diff 24.7?s
align 65536 pre 262?s on 288?s post 260?s diff 26.2?s
align 32768 pre 261?s on 287?s post 262?s diff 25.8?s
align 16384 pre 262?s on 272?s post 262?s diff 10.2?s
align 8192 pre 262?s on 265?s post 263?s diff 2.7?s
align 4096 pre 263?s on 266?s post 262?s diff 3.27?s
align 2048 pre 262?s on 264?s post 262?s diff 2.37?s
## Guessing 16 MB erase block size --> huge!
arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au /dev/sde \
--erasesize=16777216 --blocksize=1024 --open- au-nr=1
16MiB 55.9M/s
8MiB 56M/s
4MiB 56.1M/s
2MiB 56M/s
1MiB 55.7M/s
512KiB 55.9M/s
256KiB 55.6M/s
128KiB 55.8M/s
64KiB 54.4M/s
32KiB 51.9M/s
16KiB 42.6M/s
8KiB 30.6M/s
4KiB 2.97M/s
2KiB 1.5M/s
1KiB 759K/s
arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au /dev/sde \
--erasesize=16777216 --blocksize=4096 -- open-au-nr=1 --random
16MiB 56.7M/s
8MiB 44.9M/s
4MiB 23.6M/s
2MiB 22.8M/s
1MiB 22.8M/s
512KiB 22.8M/s
256KiB 22.8M/s
128KiB 22.7M/s
64KiB 20.8M/s
32KiB 16.2M/s
16KiB 8.73M/s
8KiB 3.97M/s
4KiB 2.01M/s
## random write at half speed down to 64KiB, much slower below --> 64 KB superpages?
arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au /dev/sde \
--erasesize=16777216 --blocksize=8192 -- open-au-nr=2
16MiB 56.8M/s
8MiB 56.8M/s
4MiB 56.1M/s
2MiB 55M/s
1MiB 52.9M/s
512KiB 48.9M/s
256KiB 45.3M/s
128KiB 37.9M/s
64KiB 28.7M/s
32KiB 17.4M/s
16KiB 7.67M/s
8KiB 3.78M/s
arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au /dev/sde \
--erasesize=16777216 --blocksize=8192 -- open-au-nr=2 --random
16MiB 22.7M/s
8MiB 44.3M/s
4MiB 23.1M/s
2MiB 22.8M/s
1MiB 22.6M/s
512KiB 22.2M/s
256KiB 21.6M/s
128KiB 20.5M/s
64KiB 17.3M/s
32KiB 12.2M/s
16KiB 6.47M/s
8KiB 3.01M/s
## alternating between erase blocks shows noticeable degradation anywhere below 2MB \
writes. ## enabling/disabling write cache with hdparm -W did not change this.
# The weird anomaly for random writes at 8 MB is reproducible.
arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au /dev/sde \
--erasesize=16777216 --blocksize=1048576 -- open-au-nr=8
16MiB 56.8M/s
8MiB 56.5M/s
4MiB 55.9M/s
2MiB 54.8M/s
1MiB 52.8M/s
arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au /dev/sde \
--erasesize=16777216 --blocksize=1048576 -- open-au-nr=9
16MiB 57.2M/s
8MiB 50M/s
4MiB 56.3M/s
2MiB 55.1M/s
1MiB 52.9M/s
arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au /dev/sde \
--erasesize=16777216 --blocksize=1048576 -- open-au-nr=10
16MiB 49.7M/s
8MiB 56.8M/s
4MiB 56.3M/s
2MiB 55.1M/s
1MiB 52.8M/s
arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au /dev/sde \
--erasesize=16777216 --blocksize=1048576 -- open-au-nr=11
16MiB 57.1M/s
8MiB 51.2M/s
4MiB 56.4M/s
2MiB 55.1M/s
1MiB 53.1M/s
## Same performance up to 11 erase blocks
arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au /dev/sde \
--erasesize=16777216 --blocksize=1048576 -- open-au-nr=12
16MiB 56.8M/s
8MiB 28.4M/s
4MiB 9.88M/s
2MiB 5.26M/s
1MiB 2.76M/s
arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au /dev/sde \
--erasesize=16777216 --blocksize=2048 -- open-au-nr=12
16MiB 57.3M/s
8MiB 31.1M/s
4MiB 9.93M/s
2MiB 5.29M/s
## At 12 Erase blocks massive degradation
arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au /dev/sde \
--erasesize=16777216 --blocksize=2048 -- open-au-nr=11
16MiB 57M/s
8MiB 56.7M/s
4MiB 56.2M/s
2MiB 55.2M/s
1MiB 53M/s
512KiB 49.1M/s
256KiB 45.1M/s
128KiB 37.8M/s
64KiB 28.5M/s
32KiB 17.3M/s
16KiB 7.61M/s
8KiB 3.76M/s
4KiB 1.99M/s
2KiB 985K/s
## 11 * 16 MB is the fastest we get.
arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au /dev/sde \
--erasesize=8388608 --blocksize=8192 --open- au-nr=11
8MiB 58.3M/s
4MiB 44.5M/s
2MiB 45M/s
1MiB 15.3M/s
512KiB 50.2M/s
256KiB 39.9M/s
128KiB 36.7M/s
64KiB 12.6M/s
32KiB 17.6M/s
16KiB 5.6M/s
8KiB 3.2M/s
## trying with 8 MB erase size shows significantly worse results due to more garbage
## collection overhead
arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au /dev/sde \
--erasesize=1677721--blocksize=8192 --open- au-nr=11 --random
16MiB 41M/s
8MiB 26.5M/s
4MiB 23.3M/s
2MiB 22.7M/s
1MiB 22.6M/s
512KiB 22.3M/s
256KiB 21.6M/s
128KiB 20.4M/s
64KiB 17.1M/s
32KiB 12.1M/s
16KiB 6.43M/s
8KiB 3M/s
arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au /dev/sde \
--erasesize=16777216 --blocksize=8192 -- open-au-nr=11 --random
16MiB 22.7M/s
8MiB 40.8M/s
4MiB 23.1M/s
2MiB 22.7M/s
1MiB 22.5M/s
512KiB 22.2M/s
256KiB 21.5M/s
128KiB 20.4M/s
64KiB 17.1M/s
32KiB 12.1M/s
16KiB 6.42M/s
8KiB 3M/s
## Random write also fine up to 11 erase blocks
arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au /dev/sde \
--erasesize=16777216 --blocksize=8192 -- open-au-nr=12 --random
16MiB 24.1M/s
8MiB 18.4M/s
4MiB 10.4M/s
2MiB 5.35M/s
1MiB 2.78M/s
512KiB 1.42M/s
256KiB 723K/s
128KiB 364K/s
64KiB 182K/s
32KiB 91.3K/s
## cannot do 12 erase blocks
^Carnd at wuerfel:~/flashbench$ sudo ./flashbench --findfat /dev/sde \
--erasesize=1677721--blocksize=512 --fat- nr=4 --random
16MiB 23M/s 23M/s 57.7M/s 23M/s
8MiB 45.2M/s 45.3M/s 45.3M/s 22.9M/s
4MiB 23M/s 23.7M/s 23.5M/s 22.9M/s
2MiB 22.8M/s 22.8M/s 22.9M/s 22.9M/s
1MiB 22.9M/s 23M/s 22.9M/s 22.8M/s
512KiB 22.9M/s 22.8M/s 22.9M/s 23M/s
256KiB 22.9M/s 23M/s 22.8M/s 22.8M/s
128KiB 22.8M/s 22.8M/s 22.8M/s 22.8M/s
64KiB 20.8M/s 20.8M/s 20.9M/s 20.8M/s
32KiB 16.2M/s 16.3M/s 16.2M/s 16.3M/s
## no fat area
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