I just ran a spec 2006 run on the powerpc (32-bit) last night setting the
reassociation to 2. I do see a win in bwaves, but unfortunately it is not
enough of a win, and it is still a regression to GCC 4.5. However, I see some
regressions in 3 other benchmarks (I tend to omit differences of less than 2%):
401.bzip2 97.99%
410.bwaves 113.88%
436.cactusADM 93.96%
444.namd 93.74%
The profile differences are as follows. Unfortunately, I'm not sure I can post
sample counts under Spec rules:
Bzip2:
GCC 4.7 GCC 4.7 with patches Function
======= ==================== ========
28.96% 28.39% mainSort
15.94% 15.49% BZ2_decompress
12.56% 12.35% mainGtU.part.0
11.59% 11.54% generateMTFValues
8.89% 9.04% fallbackSort
6.60% 8.28% BZ2_compressBlock
7.48% 7.21% handle_compress.isra.2
6.24% 5.95% BZ2_bzDecompress
0.55% 0.58% add_pair_to_block
0.54% 0.54% BZ2_hbMakeCodeLengths
Bwaves:
GCC 4.7 GCC 4.7 with patches Function
======= ==================== ========
78.70% 74.73% mat_times_vec_
11.68% 13.21% bi_cgstab_block_
6.72% 8.47% shell_
2.11% 2.62% jacobian_
0.79% 0.96% flux_
CactusADM:
GCC 4.7 GCC 4.7 with patches Function
======= ==================== ========
99.67% 99.69% bench_staggeredleapfrog2_
Namd:
GCC 4.7 GCC 4.7 with patches Function
======= ==================== ========
15.43% 14.71%
_ZN20ComputeNonbondedUtil26calc_pair_energy_fullelectEP9nonbonded.part.39
11.94% 11.80%
_ZN20ComputeNonbondedUtil19calc_pair_fullelectEP9nonbonded.part.40
10.18% 11.52%
_ZN20ComputeNonbondedUtil32calc_pair_energy_merge_fullelectEP9nonbonded.part.37
9.87% 9.02%
_ZN20ComputeNonbondedUtil16calc_pair_energyEP9nonbonded.part.41
9.55% 8.85%
_ZN20ComputeNonbondedUtil9calc_pairEP9nonbonded.part.42
9.52% 9.05%
_ZN20ComputeNonbondedUtil25calc_pair_merge_fullelectEP9nonbonded.part.38
7.24% 8.72%
_ZN20ComputeNonbondedUtil26calc_self_energy_fullelectEP9nonbonded.part.31
6.28% 6.42%
_ZN20ComputeNonbondedUtil19calc_self_fullelectEP9nonbonded.part.32
5.23% 6.18%
_ZN20ComputeNonbondedUtil32calc_self_energy_merge_fullelectEP9nonbonded.part.29
5.13% 4.66%
_ZN20ComputeNonbondedUtil16calc_self_energyEP9nonbonded.part.33
4.72% 4.43%
_ZN20ComputeNonbondedUtil25calc_self_merge_fullelectEP9nonbonded.part.30
4.60% 4.37%
_ZN20ComputeNonbondedUtil9calc_selfEP9nonbonded.part.34
--
Michael Meissner, IBM
5 Technology Place Drive, M/S 2757, Westford, MA 01886-3141, USA
meiss...@linux.vnet.ibm.com fax +1 (978) 399-6899
