[ubuntu-mythtv] Performance tuning for Mythbuntu

[Michael Haas]

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Michael Haas wrote:
> * use ionice to lessen I/O load caused by mythcommflag/mythtranscode

It looks like this is already done by recent kernels if you renice the
process. Since it's already possible to re-nice mythcommflag and
mythtranscode, this step is not necessary.

Quote:

> The class data
> determines how much io bandwidth the process will get, it's directly mappable
> to the cpu nice levels just more coarsely implemented. 0 is the highest
> BE prio level, 7 is the lowest. The mapping between cpu nice level and io
> nice level is determined as: io_nice = (cpu_nice + 20) / 5.

Source:


http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.22.y.git;a=blob;f=Documentation/block/ioprio.txt;h=1b930ef5a079a9f9dcbceca52851e6c14cd722ee;hb=HEAD
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