[Bug 653611] Re: extremely bad dm-crypt latency

[Michael Zugelder]

Ignore the performance spikes, these are caused by empty space, which the firmware of the drive handles faster.
Comparing the encrypted disk (2.6.32) with the raw disk, there seems to be virtually no performance penalty.

** Attachment added: "Raw disk benchmarked under 2.6.32, 0.2ms latency"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/653611/+attachment/1666556/+files/palimpsest-unencrypted.png

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extremely bad dm-crypt latency
https://bugs.launchpad.net/bugs/653611
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