[LU-2752] Enhance build for cross compilation for the Intel(R) Xeon Phi(TM) card

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.4.0
• Affects Version/s: Lustre 2.4.0
• Assignee: Dmitry Eremin (Inactive)
• Reporter: Dmitry Eremin (Inactive)

Description

Current Lustre build is not support cross compilation for the
Intel(R) Xeon Phi(TM) card. So, producing binaries
for MIC card is not trivial now and required manual changes of
sources. It would be very beneficial to provide an easy way to
produce client binaries for the Intel(R) Xeon Phi(TM) card
directly from GIT repository just specifying appropriate
--host and --build option for ./configure script.

For example, to produce Lustre binaries for MIC card just execute
the following:

./configure --host=x86_64-k1om-linux --build=x86_64-pc-linux

Issue Links

• links to: patchset

Comments

[Dmitry Eremin (Inactive)]

This patch is required for 2.4 because of assembly code with is not supported by Xeon Phi. Actually tag 2.3.65 also contain the patch. Therefore you can build it without problem. For earlier 2.3 versions most probably you will have a problem with configure. But if you be able to compile this path is not required for functionality.

[Jay Lan (Inactive)]

I meant to ask if the solution provided by this LU patch is needed even if I build in a chroot environment populated with those intel-mic-ofed rpms.

I built lustre-2.3.0 this way before I was aware of this LU ticket. If there was no lustre code changed, my build should be OK, right? The lustre client module was loaded OK.

[Andreas Dilger]

Jay, you will note that this patch has been marked as fixed in the 2.4.0 release, so no patch is necessary for that version.

[Jay Lan (Inactive)]

If I have a chroot environment with
intel-mic-ofed-kmod-devel
intel-mic-ofed-libibscif-devel
and other supportive intel-mic-ofed rpms installed,
and specify " --with-o2ib=/usr/src/intel-mic-ofed-kmod" as a configure parameter, do I still need this patch? I built a lustre client this way it seemed to build OK.

[Dmitry Eremin (Inactive)]

The config.log of the following command is attached (w/o the patch):

./configure --with-linux=/opt/intel/mic/src/card/kernel \
    --disable-server --without-o2ib \
    --host=x86_64-k1om-linux --build=x86_64-pc-linux