i.MX ProcessorsのトピックRe: Building LTIB on multicore CPU

Building LTIB on multicore CPU

mmaaxx — Thu, 06 Oct 2011 14:00:37 GMT

Hello,

I just upgraded my PC, to make rpmbuilder and ltib work faster. But, it seems like it's not using all the features. I can clearly see only one core gets pretty much all of the load. Just like I'm building something with "make" command.

And I know that make supports "-j6" parameter, that would enable 6 cores, and significantly speeds up the process.

Are there such parameter for LTIB? Or any other way to take advatage from a multicore cpu?

Thanks!

Re: Building LTIB on multicore CPU

fushi_peng — Wed, 19 Oct 2011 01:44:44 GMT

Hi ,

If you just want to build the kernel, you can goto the rpm/BUILD/linux , use make -j x to speed up the process.

But sometimes you compile the kernel first , then use ltib compile the whole packages, the kernel may be compiled one more time, and this time not the -j 6.

I suggest you can read the ltib file and bin/* , config/*, most configuration in there.

Peng Fushi

Re: Building LTIB on multicore CPU

chris321 — Fri, 16 Nov 2012 12:59:09 GMT

Sorry for answering to this old topic.

But which environment variables do we need for making the kernel directly?

only export arch=arm ?

Re: Building LTIB on multicore CPU

michaeldiamond — Fri, 16 Nov 2012 16:20:25 GMT

make ARCH=arm CROSS_COMPILE=arm-fsl-linux-gnueabi- uImage -j4

This makes the kerner into a uImage for uboot and uses 4 cores. you can substitute uImage for menuconfig to select the options you need in your kernal (the -j4 is not needed for menuconfig), or modules to build the kernel modules.

Re: Building LTIB on multicore CPU

chris321 — Mon, 19 Nov 2012 06:48:44 GMT

Thank you very much.