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On Thu, 4 Mar 2021 00:42:23 -0800
Guy Harris wrote:
> On Mar 3, 2021, at 2:30 PM, Denis Ovsienko via tcpdump-workers
> wrote:
>
> > A partial replacement for that service is ci.tcpdump.org, which is a
> > buildbot instance doing Linux AArch64 builds for the github.com
> > repositories.
>
> So where is that hosted? Are you hosting it yourself or hosting it
> on some cloud service?
ci.tcpdump.org is a brand new €3/month Linux VM, it runs the buildbot
master. The linux-aarch64 buildbot worker is running on a Raspberry Pi
next to my desk. After getting the Pi setup right the time to complete
build_matrix.sh went from 18 to 7 minutes for libpcap and from 81 to 34
minutes for tcpdump.
Looking at top output on the worker, this can be further improved
because a lot of time is spent slowly making through configure or cmake
tests on a single CPU core, and the main compilation stage is fast
mainly because of ccache. So the same solution as what is currently used
for Cirrus CI Linux (build matrix split into 2 or even 4) would likely
make the process more parallel.
One simple way to do that would be to have virtual workers (e.g.
linux-aarch64-gcc and linux-aarch64-clang with MATRIX_CC nailed down to
a local constant). I considered that, but realized that would be more
difficult to maintain because this detail conceptually belongs to the
"builder" component of buildbot master. So this space for improvement
is going to remain for a bit longer.
--
Denis Ovsienko
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