[yocto] Yocto build is taking too long time in kernel do_package and do_populate_sysroots

[Bruce Ashfield]

On 14-07-14 11:20 AM, jags gediya wrote:
> I am a newbie to yocto. For the purpose of check in code on svn, I
> have deleted all .git, .gitignore and .repo file from yocto before
> built. Then i have checked out that code from svn and started the
> yocto built.
>
> But my compilation used to stop at below point for more than an hour.

Depending on the speed of your machine, the disk, memory, etc .. yes,
those tasks can take a long time.

We've been working on improving kernel build and packaging time for
several releases now, and are still continuing in the upcoming
1.7 release.

The sheer amount of files, i/o and packaging required for the kernel
build, sysroot, kernel modules and packages simply takes time.

For incremental development, and testing workflow. Look into only
running the single task you need (i.e. just compile), or look at using
"externalsrc" support. Both those options will significant speed up
your iterative development time.

Bruce

>
> Currently 2 running tasks (1771 of 1777):
>      0: linux-imx-3.10.17-r0 do_package (pid 4011)
>      1: linux-imx-3.10.17-r0 do_populate_sysroot (pid 19696)
> I am building the core-image-minimal for imx6sl evk.
>
> Some modification i have done for the kernel and u-boot. I am not
> taking kernel and u-boot from the git. Instead i have changed the
> SRC_URI, and i have given there the path for kernel and u-boot to take
> it from local system.
>
> Things i have modified as per below.
> originally linux-imx.inc was having,
>
> LICENSE = "GPLv2"
> LIC_FILES_CHKSUM = "file://COPYING;md5=d7810fab7487fb0aad327b76f1be7cd7"
>
> inherit kernel
>
> # Put a local version until we have a true SRCREV to point to
> LOCALVERSION ?= "+yocto"
> SCMVERSION ?= "y"
>
> SRC_URI = "git://git.freescale.com/imx/linux-2.6-imx.git;branch=${SRCBRANCH} \
>             file://defconfig \
> "
>
> S = "${WORKDIR}/git"
>
> I have changed it to,
>
> #LICENSE = "GPLv2"
> #LIC_FILES_CHKSUM = "file://COPYING;md5=d7810fab7487fb0aad327b76f1be7cd7"
> LICENSE = "CLOSED"
>
> inherit kernel
>
> SRC_URI = "file://${BSPDIR}/kernel \
>             file://defconfig \
> "
> S = "${BSPDIR}/kernel"
>
> Can anyone point me if i have done any wrong configuration.
> PS: Before chevk in on svn, Kernel compilation was taking that much
> long time while building images.
>
> Thanks,
> Jags
>