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[Bug tree-optimization/50480] New: 10% performance regression on Spec2006 410.bwaves
- From: "kirill.yukhin at intel dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 22 Sep 2011 09:59:54 +0000
- Subject: [Bug tree-optimization/50480] New: 10% performance regression on Spec2006 410.bwaves
- Auto-submitted: auto-generated
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50480
Bug #: 50480
Summary: 10% performance regression on Spec2006 410.bwaves
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: kirill.yukhin@intel.com
Hi,
Recently Richard fixed this http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49957
According to my measurements, fix for that bug caused (on Spec2006):
For SandyBride CPU:
* 410.bwaves degradation is -9.54% for peak32
* 410.bwaves degradation is -6.91% for base32
* 410.bwaves improvement is 1.00% for peak64
* 410.bwaves improvement is 0.91% 3or base64
For Corei7 CPU:
* 410.bwaves degradation is -3.91% for peak32
* 410.bwaves degradation is -3.91% for base32
* 410.bwaves improvement is 1.94% for peak64
* 410.bwaves improvement is 3.23% 3or base64
For AMD (Phenom(tm) II X3 B75) CPU:
* 410.bwaves degradation is -7.32% for peak32
* 410.bwaves degradation is -6.56% for base32
* 410.bwaves improvement is 2.01% for peak64
* 410.bwaves degradation is -1.34% 3or base64