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[Bug kprobes/2062] Return probes does not scale well on SMP box
- From: "jkenisto at us dot ibm dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 18 Apr 2006 18:09:40 -0000
- Subject: [Bug kprobes/2062] Return probes does not scale well on SMP box
- References: <20051216010933.2062.anil.s.keshavamurthy@intel.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From jkenisto at us dot ibm dot com 2006-04-18 18:09 -------
Created an attachment (id=974)
--> (http://sourceware.org/bugzilla/attachment.cgi?id=974&action=view)
Thoughts on finer-grained locking for return probes
I don't see how we can avoid significant lock overhead, because kretprobe data
structures are much more dynamic that kprobe data structures: we're constantly
moving kretprobe_instances back and forth between the kretprobe's free list and
kretprobe_inst_table[].
I've been thinking about this issue, though. Attached are my current thoughts
on finer-grained locking.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=2062
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