This is the mail archive of the
systemtap@sourceware.org
mailing list for the systemtap project.
[Bug translator/2341] New: optimize locks for read-mostly variables
- From: "fche at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 15 Feb 2006 17:20:11 -0000
- Subject: [Bug translator/2341] New: optimize locks for read-mostly variables
- Reply-to: sourceware-bugzilla at sourceware dot org
This is a good task for someone who wants to dip a toe into the translator
optimizer. They focus on the emit_locks/emit_unlocks functions in translate.cxx.
- elide all global variable lock/unlock operations from begin/end probes
- in translate_pass(), compute another varuse_collecting_visitor instance, over
all probes except begin/end probes; put it into a new c_unparser field
- within emit_locks/unlocks, elide a read lock that would be taken for a global,
if it turns out that it is not written to in any normal probe. That is, if that
newly computed semi-global varuse_collecting_visitor instance does *not* note a
global as written-to, then we don't have to lock it here to read it safely.
--
Summary: optimize locks for read-mostly variables
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: translator
AssignedTo: systemtap at sources dot redhat dot com
ReportedBy: fche at redhat dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=2341
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.