Re: [PATCH 3/3] coccicheck: add parallel execution

[Greg Dietsche]

On 07/12/2011 09:42 PM, Joe Perches wrote:
> On Tue, 2011-07-12 at 20:26 -0500, Greg Dietsche wrote:
>    
> > For example to process 6 SmPL patches at the same time:
> > 	make coccicheck PARALLEL=6
> > Results are held in /tmp until the scripts finish. By doing this the
> > script is able to collate the results from each SmPL patch instead of
> > interleaving them in the output.
> >      
> You might try adding support for gnu parallel instead.
> http://www.gnu.org/software/parallel/
>
>    
That is a very interesting and useful tool :) I'd never heard of it 
before. The man page scares me a little bit - lots of options are marked 
as "alpha testing," but the ones i tried seemed to work fine. Anyway, 
without any modifications to Coccinelle, it is possible to do this:

ls scripts/coccinelle/*/*.cocci | parallel -j+0 make coccicheck COCCI={} 
MODE=patch

it seems to behave mostly like my patch, but doesn't cleanup quite as 
well if you decide to kill it with ctrl-c (it leaves instances of spatch 
running). On the upside, it is up to 3 seconds faster than my patch 
(because my patch waits 3 seconds before checking on the number of jobs 
that are running).

Greg
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/