[theora-dev] GSoC - Theora multithread decoder
giles at xiph.org
Fri Aug 15 00:21:53 PDT 2008
On 14-Aug-08, at 5:49 PM, Leonardo de Paula Rosa Piga wrote:
> This email is to inform what I have been doing since the mid-term.
Thanks, it's great to hear a report. A few comments/questions below.
> As I said before I did a pipelined implementation of these functions:
> (c_dec_dc_unpredict_mcu_plane + oc_dec_frags_recon_mcu_plane) and
> (oc_state_loop_filter_frag_rows + oc_state_borders_fill_rows) as
> explained in my previous email.
> But the results were not good. They were equal the implementation
> without pipeline.
That's too bad. Do you have any hope that explicit threading would do
Why are the error bars so large on three points on this plot? There
data doesn't distinguish anything in that mcu range.
> My project is with few code, I tried to do my best. When I proposed
> this project I knew that it would be very difficult. It was
> challenging and I have learned a lot, specially about the OpenMP
You shouldn't be so discouraged. We were all aware this was a
difficult proposal, but actually trying things is still useful work.
You should also commit all the code for these tests. That way others
can reproduce and build on your work. One advantage of open source
code repositories is that you can publish negative results. Google
also wants all your code at the end of the program, and it's easier
if they can pull it from our repository.
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