How fast is eMMC storage?


#1

Hello,
How fast is eMMC storage in Khadas Vim2 Max?

Kind regards,
Gordon


#2

not sure if this is what you ask for

 internal partition
# hdparm -Tt /dev/mmcblk1p14
/dev/mmcblk1p14:
 Timing cached reads:   1808 MB in  2.00 seconds = 904.08 MB/sec
 Timing buffered disk reads: 476 MB in  3.01 seconds = 158.17 MB/sec

 external SD partition
# hdparm -Tt /dev/mmcblk0p2 
/dev/mmcblk0p2:
 Timing cached reads:   1714 MB in  2.00 seconds = 856.76 MB/sec
 Timing buffered disk reads:  68 MB in  3.01 seconds =  22.58 MB/sec

 network block device
# hdparm -Tt /dev/nbd7
/dev/nbd7:
 Timing cached reads:   1758 MB in  2.00 seconds = 879.04 MB/sec
 Timing buffered disk reads: 288 MB in  3.00 seconds =  95.84 MB/sec

#3

I’ve got 64Gb

$ iozone -e -I -a -s 100M -r 1k -r 4k -r 16k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2
Iozone: Performance Test of File I/O
Version $Revision: 3.429 $
Compiled for 64 bit mode.
Build: linux

Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins
Al Slater, Scott Rhine, Mike Wisner, Ken Goss
Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR,
Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner,
Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone,
Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root,
Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer,
Vangel Bojaxhi, Ben England, Vikentsi Lapa.

Run began: Tue Mar 13 00:41:50 2018

Include fsync in write timing
O_DIRECT feature enabled
Auto Mode
File size set to 102400 kB
Record Size 1 kB
Record Size 4 kB
Record Size 16 kB
Record Size 512 kB
Record Size 1024 kB
Record Size 16384 kB
Command line used: iozone -e -I -a -s 100M -r 1k -r 4k -r 16k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2
Output is in kBytes/sec
Time Resolution = 0.000001 seconds.
Processor cache size set to 1024 kBytes.
Processor cache line size set to 32 bytes.
File stride size set to 17 * record size.
random random bkwd record stride
kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread
102400 1 3881 3000 5468 5487 5411 1950
102400 4 15079 17453 20149 18847 18469 15887
102400 16 30817 32803 58385 58478 56249 30911
102400 512 47035 47352 128568 129126 128634 46990
102400 1024 46474 47715 130571 130852 130687 46370
102400 16384 45473 47508 133271 134152 134230 47717

iozone test complete.