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[Bug target/32086] [4.3 Regression] 10% to 20% Performance Regression Between 4.1.3 and 4.3
- From: "ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 30 Nov 2007 13:20:08 -0000
- Subject: [Bug target/32086] [4.3 Regression] 10% to 20% Performance Regression Between 4.1.3 and 4.3
- References: <bug-32086-13404@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #7 from ubizjak at gmail dot com 2007-11-30 13:20 -------
This is with latest SVN:
Benchmark
Name 387 387c sse ssec
--------- ------- ------- ------- -------
ac 16.57 16.57 22.66 22.65
aermod 55.85 54.72 50.23 51.08
air 14.95 15.02 15.92 15.94
capacita 78.60 78.55 81.89 81.95
channel 9.90 9.78 9.90 9.65
doduc 59.82 59.65 67.81 68.97
fatigue 20.06 18.27 21.65 21.27
gas_dyn 11.47 11.35 10.62 10.68
induct 60.60 50.92 73.82 58.74
linpk 27.26 27.20 28.24 28.17
mdbx 30.41 30.36 33.33 33.23
nf 33.63 33.69 31.97 32.03
protein 73.16 72.87 72.67 72.76
rnflow 57.18 57.18 42.19 42.46
test_fpu 20.71 20.86 21.61 21.54
tfft 4.86 5.10 4.92 5.11
27.48 27.03 28.26 27.93
gcc version 4.3.0 20071130 (experimental) [trunk revision 130533] (GCC)
Family: 15 Model: 4 Stepping: 10 Type: 0 Brand: 0
CPU Model: Pentium 4 D (Foster) Original OEM
Processor name string: Intel(R) Xeon(TM) CPU 3.60GHz
Compile Command :
-march=opteron -ffast-math -funroll-loops -ftree-loop-linear -msse3 -O3
387 : -mfpmath=387
387c: -mfpmath=387 -fvec-cost-model
sse : -mfpmath=sse
ssec: -mfpmath=sse -fvec-cost-model
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32086