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[Bug runtime/6504] change _stp_print_flush to avoid calling into kernel/relay.c
- From: "mhiramat at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 9 May 2008 21:03:08 -0000
- Subject: [Bug runtime/6504] change _stp_print_flush to avoid calling into kernel/relay.c
- References: <20080509195901.6504.fche@redhat.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From mhiramat at redhat dot com 2008-05-09 21:03 -------
(In reply to comment #0)
> I'm told lttng uses more conservative code (setting a
> flag; having a separate worker/timer thread manage data copying, or
> something like that).
AFAIK, it has a separate interval timer which just wakes reader process
up, not copying data.
I think we can do similar thing by replacing relay_reserve/relay_flush with
original utt functions which do not call __mod_timer nor relay_switch_subbuf.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=6504
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