* [Bug libdw/22252] New: Parallel parsing of CU's DIEs from libdw
@ 2017-10-04 18:23 woodard at redhat dot com
2020-09-09 13:38 ` [Bug libdw/22252] " mark at klomp dot org
2020-11-13 0:00 ` woodard at redhat dot com
0 siblings, 2 replies; 3+ messages in thread
From: woodard at redhat dot com @ 2017-10-04 18:23 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=22252
Bug ID: 22252
Summary: Parallel parsing of CU's DIEs from libdw
Product: elfutils
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: libdw
Assignee: unassigned at sourceware dot org
Reporter: woodard at redhat dot com
CC: elfutils-devel at sourceware dot org
Target Milestone: ---
To speed up the processing of large ELF files which are common in HPC please
resolve the data races which prevent parallel parsing of CU's DIEs within ELF
files. We'd like to do something like:
for(Dwarf_Off cu_off = 0;
dwarf_next_unit(dbg(), cu_off, &next_cu_header, &cu_header_length,
NULL, &abbrev_offset, &addr_size, &offset_size,
&type_signaturep, NULL) == 0;
cu_off = next_cu_header)
{
if(!dwarf_offdie_types(dbg(), cu_off + cu_header_length,
¤t_cu_die))
continue;
// Modified for parallelism: rather than a single DwarfWalker holding state,
// create a new context and clone before we spawn a thread
push();
DwarfWalker mod_walker(*this);
pop();
bool ret = cilk_spawn mod_walker.parseModule(false, fixUnknownMod);
// bool ret = parseModule(false, fixUnknownMod);
if(!ret) {
cilk_sync;
return false;
}
compile_offset = next_cu_header;
}
cilk_sync;
Code similar to this is being worked on for dyninst http://www.dyninst.org/
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* [Bug libdw/22252] Parallel parsing of CU's DIEs from libdw
2017-10-04 18:23 [Bug libdw/22252] New: Parallel parsing of CU's DIEs from libdw woodard at redhat dot com
@ 2020-09-09 13:38 ` mark at klomp dot org
2020-11-13 0:00 ` woodard at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: mark at klomp dot org @ 2020-09-09 13:38 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=22252
Mark Wielaard <mark at klomp dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |WAITING
CC| |mark at klomp dot org
--- Comment #1 from Mark Wielaard <mark at klomp dot org> ---
I believe this has been resolved since elfutils Version 0.178
libdw: Abbrevs and DIEs can now be read concurrently by multiple
threads through the same Dwarf handle.
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* [Bug libdw/22252] Parallel parsing of CU's DIEs from libdw
2017-10-04 18:23 [Bug libdw/22252] New: Parallel parsing of CU's DIEs from libdw woodard at redhat dot com
2020-09-09 13:38 ` [Bug libdw/22252] " mark at klomp dot org
@ 2020-11-13 0:00 ` woodard at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: woodard at redhat dot com @ 2020-11-13 0:00 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=22252
Ben Woodard <woodard at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Ben Woodard <woodard at redhat dot com> ---
Yea done.
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2017-10-04 18:23 [Bug libdw/22252] New: Parallel parsing of CU's DIEs from libdw woodard at redhat dot com
2020-09-09 13:38 ` [Bug libdw/22252] " mark at klomp dot org
2020-11-13 0:00 ` woodard at redhat dot com
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