[erlang-patches] DTrace patch, review draft #3

Andreas Schultz <>
Fri Nov 18 11:50:31 CET 2011

Hi Scott,

I have converted all DTrace scripts to SystemTap and added a README:

git fetch git://github.com/RoadRunnr/otp.git dtrace-systemtap



----- Original Message -----
> Björn Gustavsson <> wrote:
> bg> My final comment is that your changes are included in a single
> bg> commit, which make it harder to review and will it make it harder
> to
> bg> understand in the future. I would suggest breaking it up into
> bg> several commits (at least three): [...]
> Björn, I've split the commit from 1 -> 4 pieces.  I've also fixed a
> few
> bugs and have un-done the DTrace-related edits that I'd put in
> README.md.  Instead, that text has been moved to a new file,
> README.dtrace.md.
> I have eliminated all of the OTP test suite failures that I'm aware
> of,
> though the tests were run this afternoon prior to splitting the
> commit.
> It's possible that I un-fixed a bugfix, though I think the odds are
> low.
> I'll be re-running the tests overnight tonight with DTrace
> unconfigured,
> DTrace configured, and DTrace configured + probes enabled(*).
> git clone git://github.com/slfritchie/otp.git dtrace-review3
> https://github.com/slfritchie/otp/compare/dtrace-review3
> https://github.com/slfritchie/otp/compare/dtrace-review3.patch
> -Scott
> (*) I've encountered a odd/weird/buggy? problem with Solaris 10 where
> the Erlang OS process occasionally dumps core due to a SIGTRAP.  I
> think
> it may have to do with a race condition between starting a new
> process
> and a turn-them-all-on probe specification.  If anybody happens to
> know
> (or guess) anything about this, please contact me.

Dipl. Inform.
Andreas Schultz


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