qemuarm failure on autobuilder - analysis


Richard Purdie
 

Today's failure for analysis is a qemuarm failure where all the test images 
failed at the same time:

https://autobuilder.yoctoproject.org/typhoon/#/builders/53/builds/3493

We have's Randy+team's logging for this here:

https://autobuilder.yocto.io/pub/non-release/20210526-2/testresults/qemuarm/2021-05-26--08-58/host_stats_1_top.txt

What is interesting is the load average is peaked at the point the three 
qemu-system-arm are running at 300+ compared to the usual 50-80.

What is it doing at the time? In parallel to qemuarm there appears to 
be:

reproducibile-fedora 
(in stage B, non-sstate, i.e. from scratch) 
building llvm, webkitgkt, kernel-devsrc, qemu, kea
musl-x86-64
building webkitgtk, piglit, cmake, kernel-devsrc, llvm, stress-ng

which is a pretty heavy workload as those are all pretty heavy targets.

I question whether cmake's rpmbuild really should be using 7g of RES 
memory (15g VIRT).

The python bitbake-worker processes at near 100% cpu are interesting, 
I suspect those are python tasks for recipes. The code is meant to 
rename the process so we can better identify it but that is a tricky
thing under linux and hints it may not be working.

Bottom line for this one suggests it was load related.

Cheers,

Richard

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