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[Bug kprobes/2062] Return probes does not scale well on SMP box
- From: "fche at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 19 Apr 2006 21:56:55 -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 fche at redhat dot com 2006-04-19 21:56 -------
If it were a matter only of accelerating *allocation* and *deallocation* of the
kretprobe_instances, sure, per-cpu free_instances pools would be handy. But the
code also needs to deal with *lookup*, which needs to search cross-cpus thus a
shared used_instances.
Perhaps the single global kretprobe_lock could be replaced with per-kretprobe locks?
--
http://sourceware.org/bugzilla/show_bug.cgi?id=2062
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