Tests of I/O on various SD cards using Bonnie.

David Kuehling dvdkhlng at gmx.de
Wed Nov 2 16:46:44 EDT 2011


Hi Delbert, 

thanks for the writeup.  Maybe this should go into the qi-hw.com wiki,
many NanoNote owners will find this useful.

>>>>> "Delbert" == Delbert Franz <ddf at sonic.net> writes:

> 5.  Using Ext4 without a journal is slightly faster on writing.

Have you tried mounting ext4 with option 'nobarrier'?  Recent kernels
enable write barriers by default, reducing write performance a lot, when
the underlying device supports barriers.  Looking at dmesg you should
see whether barries were in use.

But looking over your tables, the differences between cards aren't very
noticable, anyway?

cheers,

David
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