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[Bug runtime/11592] sdt.h should have a 'disable-semaphores' override option
- From: "fche at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 12 May 2010 15:24:25 -0000
- Subject: [Bug runtime/11592] sdt.h should have a 'disable-semaphores' override option
- References: <20100512130744.11592.fche@redhat.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From fche at redhat dot com 2010-05-12 15:24 -------
(In reply to comment #1)
> Why doesn't semaphores work like the is-enabled stuff in dtrace:
Right, that foo_IS_ENABLED() is already supported as is.
> Seems like that would be much more useful than automatically enabling it for all
> probes.
The argument has been that we've encountered cases where sdt.h macros
were called with fairly heavy-weight arguments, but without an
explicit foo_IS_ENABLED() wrapper. In these cases, it helped. But now
there is evidence that it also hurts sometimes, so we need to re-evaluate.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=11592
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