[Mono-list] [Mono-dev] Mono preview 2.0 binary and DTrace
gnorton at novell.com
Sat Aug 2 14:14:48 EDT 2008
I'm fine with this on trunk, but I still think barring any compelling
reason we should leave the branch as is.
On Sat, 2008-08-02 at 19:20 +0200, Zoltan Varga wrote:
> Looking at dtrace.h, all the current probes seem to be in
> non-critical code-paths, so they
> are unlikely to have a perf impact. We could make --enable-dtrace=true
> the default in HEAD,
> so it gets some testing.
> On Sat, Aug 2, 2008 at 7:16 PM, Geoff Norton <gnorton at novell.com> wrote:
> > On Sat, 2008-08-02 at 18:30 +0200, Andreas Färber wrote:
> >> Not fully true, there is of course a minimal degradation (~5 nop
> >> instructions on Solaris), but it should be hardly noticeable. I have
> >> taken care to only call helper functions when the probe is active.
> >> Was the answer on IRC in any way official? I could think of three
> >> possible reasons:
> >> a) Worries about performance degradation.
> > Yes
> >> b) No one updated the build system.
> > True but minor
> >> c) The build machine isn't DTrace-capable.
> > d) We havn't tested it fully in our QA process, nor has it been
> > available long enough for us to feel comfortable turning it on at this
> > stage. We also would need to invesgate how to do it in our universal
> > binaries, etc. Its a lot of testing and it unfortunately will not make
> > 2.0 unless there is a compelling argument against this and support from
> > the runtime team and from the QA team.
> > -g
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