[RFC/PATCH 2/3] NAND multiple plane feature

Jörn Engel joern at logfs.org
Thu Jun 5 17:09:29 EDT 2008

On Tue, 3 June 2008 17:57:35 +0100, Alexey Korolev wrote:
> We did some performance testing for this feature: we did not find a test
> case where JFFS2 on NAND with dual-plane has lower performance than
> JFFS2 on NAND without dual-plane features. (note: subpage read feature
> was enabled for both cases)

Maybe I have a testcase for you.  The "evil workload".

1. Write a file until you get -ENOSPC.
2. Replace 1000 page-sized page-aligned blocks at random offsets.

The time for 2 should roughly double with bigger eraseblocks.

[ And yes, I originally got this testcase from you. ;) ]


Time? What's that? Time is only worth what you do with it.
-- Theo de Raadt

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