05-29-2016, 01:32 PM
(05-11-2016, 09:15 AM)tkaiser Wrote:(05-10-2016, 12:40 PM)harpoo Wrote: I have managed as well to start in xwindow mode but the system goes really slow and gets frozen sometimes for some seconds.
Do the following to confirm the usual problem when one combines a SD card with slow random write performance and a Desktop Linux or Android:
Code:sudo apt-get install iozone3
iozone -e -I -a -s 100M -r 4k -r 16k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2
And for a better understanding what's going on/wrong just look through the specific thread: http://forum.pine64.org/showthread.php?tid=191&pid=9042
Tkaiser,
Many thanks for the info, very useful!
My Kingston card has indeed an appalling random write rate 212kb/s. I have now tried a old SanDisk I had laying around and random writes at 567kb/s. Much better but far from the 3Mb/s that the Evo+ is supposed to give you so I think I will get myself a 64Gb Evo+ which are not too expensive at the moment.
Quote:Kingston
Command line used: iozone -e -I -a -s 100M -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 4 1004 1100 6522 6516 5410 212
102400 16 4302 4104 11503 11491
Quote:SanDisk
Command line used: iozone -e -I -a -s 100M -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 4 1164 1176 5030 5032 3651 567