[erlang-questions] FreeBSD dtrace-enabled builds

[Kenji Rikitake]

I've never seen the "WARNING: number of probes fixed..." message in my
environment (a kerl-built 17.4.1 with dtrace). I haven't recently tested
the dtrace build on Port lang/erlang. See
https://github.com/jj1bdx/dot-kerlrc/blob/master/dot-kerlrc-freebsd
for the .kerlrc config.

I suggest you to file a problem report at
https://bugs.freebsd.org/bugzilla/

Kenji Rikitake

++> Dave Cottlehuber <dch@REDACTED> [2015-02-11 13:36:40 +0100]:
> On Sat, 31 Jan 2015, at 10:02 AM, Dave Cottlehuber wrote:
> > Hi,
> > 
> > On FreeBSD 10.1R amd64, after building a modified lang/erlang port, the
> > following alarming warning is displayed. This is the same in the newer
> > lang/erlang-runtime17 flavour as well BTW.
> > 
> > WARNING: number of probes fixed does not match the number of defined
> > probes (1001 != 1088, respectively)
> > WARNING: some probes might not fire or your program might crash
> > Erlang/OTP 17 [erts-6.3] [source] [64-bit] [smp:8:8] [async-threads:64]
> > [hipe] [kernel-poll:true] [dtrace]
> > 
> > Eshell V6.3  (abort with ^G)
> > 1>
> > 
> > No doubt this is in reference the forthcoming zombie apocalypse…
> > 
> > How serious is this — does anybody have practical experience to relate?
> > 
> > Any idea on what the problem might be or what I might need to do to fix
> > it?
> > 
> > Assuming this is resolved, what is the practical impact of using a
> > dtrace-enabled build in production? Is there likely to be a significant
> > performance hit, or is this even foolish from a stability perspective?
> > Handwavey answers are entirely appropriate here.
> > 
> > A+, Dave
> > — sent from my Couch
> 
> Gently bumping this dtrace thread... any takers?
> 
> Thanks!
> Dave
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