Trace compression improvements

[José Fonseca]

I haven't looked at the changes in detail yet -- I'll do it as soon as I
find the time -- but sounds good in principle. Indeed trying out LZ4 has
been in the to do for some time, so thanks for doing this.

Did you get any figures (speed r& compression ratio) on how it compares
with snappy? A good benchmark is "ipers" demo, part of mesa demos. It is
what Zack used when he was improving the compression speed w/ snappy.

Jose


On Sat, Jun 1, 2013 at 2:39 PM, evel <evel at ispras.ru> wrote:

> Hello,
>
> This patch series improves trace compression by implementing threaded
> compression offloading and providing alternative compression methods.  The
> main difference from previously implemented threaded compression is that
> locking overhead is significantly reduced thanks to using a double-buffered
> output buffer instead of a ring buffer that was locked on each call dump
> operation.
>
> https://github.com/Testiki/**apitrace/tree/threaded-file<https://github.com/Testiki/apitrace/tree/threaded-file>
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