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| author | Hal Finkel <hfinkel@anl.gov> | 2013-11-29 07:04:59 +0000 |
|---|---|---|
| committer | Hal Finkel <hfinkel@anl.gov> | 2013-11-29 07:04:59 +0000 |
| commit | eb5a560e0026ddaa33b26675d1d70148a3c0ad82 (patch) | |
| tree | b7c0fb1b9fe8077357d7bf88f66a4d2c05ab4c09 /test/MC | |
| parent | d7d0669b4bb30f8f5e292c7e3d54d963328f2231 (diff) | |
| download | llvm-eb5a560e0026ddaa33b26675d1d70148a3c0ad82.tar.gz llvm-eb5a560e0026ddaa33b26675d1d70148a3c0ad82.tar.bz2 llvm-eb5a560e0026ddaa33b26675d1d70148a3c0ad82.tar.xz | |
Adjust PPC A2 input operand latencies
On the PPC A2, instructions are only issued after their input operands are
ready. Model this by specifying that input operands are read at dispatch (0
cycles after issue). This changes all input operand latencies from 1 to 0.
Significant test-suite performance changes (these are 99.5% confidence
intervals on 6 runs for both before and after):
speedups:
MultiSource/Benchmarks/sim/sim
-1.21915% +/- 0.175063%
MultiSource/Benchmarks/TSVC/LinearDependence-flt/LinearDependence-flt
-1.23946% +/- 1.05133%
SingleSource/Benchmarks/Misc/flops-2
-1.24237% +/- 0.681362%
MultiSource/Applications/JM/lencod/lencod
-1.33992% +/- 0.757498%
MultiSource/Benchmarks/TSVC/InductionVariable-flt/InductionVariable-flt
-1.51802% +/- 1.21468%
MultiSource/Benchmarks/TSVC/GlobalDataFlow-flt/GlobalDataFlow-flt
-2.18818% +/- 1.28605%
MultiSource/Benchmarks/TSVC/Packing-flt/Packing-flt
-2.21977% +/- 1.19499%
SingleSource/Benchmarks/BenchmarkGame/spectral-norm
-2.29822% +/- 0.671871%
MultiSource/Benchmarks/TSVC/Packing-dbl/Packing-dbl
-2.40975% +/- 0.355931%
SingleSource/Benchmarks/Misc/fp-convert
-2.41899% +/- 1.04751%
MultiSource/Benchmarks/TSVC/Searching-dbl/Searching-dbl
-2.50349% +/- 0.126765%
SingleSource/Benchmarks/Misc/flops-3
-3.00214% +/- 0.700795%
MultiSource/Benchmarks/TSVC/LoopRestructuring-flt/LoopRestructuring-flt
-3.56995% +/- 3.2929%
MultiSource/Applications/sgefa/sgefa
-4.24908% +/- 2.00413%
MultiSource/Benchmarks/ASC_Sequoia/IRSmk/IRSmk
-18.1294% +/- 3.96489%
regressions:
MultiSource/Benchmarks/TSVC/Reductions-dbl/Reductions-dbl
1.03249% +/- 0.178547%
MultiSource/Applications/hexxagon/hexxagon
1.16597% +/- 0.285235%
MultiSource/Benchmarks/TSVC/IndirectAddressing-flt/IndirectAddressing-flt
1.39576% +/- 1.07855%
SingleSource/Benchmarks/Misc-C++/stepanov_v1p2
1.71539% +/- 0.173182%
MultiSource/Benchmarks/Fhourstones-3.1/fhourstones3.1
1.90013% +/- 0.866472%
MultiSource/Benchmarks/TSVC/Recurrences-dbl/Recurrences-dbl
2.39854% +/- 1.05914%
MultiSource/Benchmarks/TSVC/ControlFlow-dbl/ControlFlow-dbl
2.4402% +/- 0.817904%
MultiSource/Benchmarks/TSVC/LoopRestructuring-dbl/LoopRestructuring-dbl
5.87997% +/- 3.3172%
MultiSource/Benchmarks/Trimaran/netbench-crc/netbench-crc
9.02643% +/- 5.79591%
MultiSource/Benchmarks/VersaBench/bmm/bmm
10.3517% +/- 1.227%
Obviously, there are data points on both sides of this; but I think, overall,
this supports making the change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195951 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/MC')
0 files changed, 0 insertions, 0 deletions