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DragonFly kernel List (threaded) for 2011-08
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Updated TRIM patches and a graph

From: Tim Bisson <bissont@xxxxxxx>
Date: Sat, 20 Aug 2011 15:34:16 -0700

Hi All,

I've updated the TRIM patches to include Sam Greear's comments. Thanks Sam.

The updated code and graph below can be found here:

I also created a graph showing the effect of "random small writes" on sequential read performance on an SSD. What I did was TRIM the device, then dirty the device for X minutes, then sequentially read through the entire device. The graph shows the average read throughput of reading the entire device.

This implies that if you end up doing a lot of small-write updates and sequential reads, you should use TRIM...

I'm trying to get numbers while using online UFS trim, but I'm still trying to debug the "fsstress & UFS" bug (appears on master w/out TRIM too):


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