This is the mail archive of the
java@gcc.gnu.org
mailing list for the Java project.
Re: Synchronization cost regression
- To: "Boehm, Hans" <hans_boehm at hp dot com>
- Subject: Re: Synchronization cost regression
- From: Jeff Sturm <jsturm at one-point dot com>
- Date: Sat, 4 Aug 2001 10:40:48 -0400 (EDT)
- cc: java at gcc dot gnu dot org
On Wed, 1 Aug 2001, Boehm, Hans wrote:
> I noticed what apppears to be a regression in the synchronization cost with
> the the trunk. I recently updated my tree, and some synchronization tests
> run 10-20% slower. Looking at the X86 assembly code, a likely culprit seems
> to be that _Jv_ThreadSelf is not getting inlined into _Jv_monitorEnter and
> _Jv_MonitorExit. Unfortunately, I no longer have the old tree around to
> easily verify that this was happening before.
Inlining is achieved at -O and higher with the `inline' keyword. I don't
see a problem, however my backend is slightly out of date.
Somebody else mentioned that the c++ inliner heuristics have recently been
tweaked. That shouldn't affect an explicit inline. But if this behavior
persists it might be a good idea to file a PR.
Jeff