SD / Filesystem write lags -- test?

Daniel Drake dsd at
Wed Jun 23 19:11:27 EDT 2010

On 23 June 2010 16:08, Martin Langhoff > you've mentioned some
interesting details to our writes-to-SD-are-slow
> issues. Do we have a good scripted test that is current to the problem
> (as we understand it today)?

I wrote one, you can find it here:

It replicates a series of writes that were performed by a
multiple-second sync() on my XO-1.5 at the time. It's a destructive

But this probably isn't what you're looking for, if you're looking to
work on the VFS layer. The problem can't be fixed there, but it could
hopefully be made less painful.


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