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Re: [PATCH] kchecker: build already built directory — Semantic Matching Tool

Re: [PATCH] kchecker: build already built directory

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On Fri, Aug 14, 2015 at 11:09:17AM +0530, Sudip Mukherjee wrote:
> On Wed, Aug 12, 2015 at 05:40:28PM +0300, Dan Carpenter wrote:
> > On Wed, Aug 12, 2015 at 01:59:20PM +0530, Sudip Mukherjee wrote:
> > > Just started with it from yesterday. Initial database building took
> > > almost yesterday full day and night. Today while building it took
> > > around 1.5 hours.
> > 
> > You mean that it took 24 hours to build the DB and 1.5 to retest the
> > kernel using the database?
> Sorry, could not reply yesterday.
> First time the DB was built it took more than 13 hours to complete.
> Not exactly sure how much, i left the computer on to complete this while
> going home from work. From home I checked once and saw that it was still
> running. Then it was almost 13 hours after starting.

Way longer than I would expect.

> > 
> > Sorry for that...
> no problem. we are here for this only, :)
> And this is only for the first time. Next time I again ran
> build_kernel_data.sh , it was something around 1.5 - 2 hours. Now
> test_kernel.sh is running on another terminal, lets see how much time it
> takes.
> >What kind of a computer are you using?  RAM and
> > number of cores?  Do you have hyperthreading?
> 64bit, 4 core, 8GB ram, CPU MHz: 3000.000 hyperthreading not there.
> Just one thing, your test_kernel.sh was taking NR_CPU as 4, I hardcoded
> that to 8. Can that be the problem?

I don't think it is a good idea, but I haven't tested.  Things end up
fighting over the CPU so it could be a slow down.  Building the database
has been highly optimized by trial and error for my personal system.

Anyway, reset the NR_CPU and let me know if it's compiling or buiding
the database which is the problem.

regards,
dan carpenter

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