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Distinct solutions after online classification (auto/crowd-tune GCC compiler flags (minimize execution time))

Scenario UID	8289e0cf24346aa7 (experiment.tune.compiler.flags.gcc.e)
Data UID	20193453da8bad47

Discuss (optimizations to improve compilers, semantic/data set/hardware features to improve predictions, etc):	GitHub wiki, Google group

Download:	[ All solutions in JSON ], [ Solutions' classification in JSON ]
Reproduce all (with reactions):	ck replay 8289e0cf24346aa7:20193453da8bad47

Compiler	GCC 4.9
CPU	hi6620oem
Objective	min

Improvement key IK1	Main kernel execution time speedup [min]
Improvement key IK2	Code size improvement

Improvements (<4% variation)

Distinct workload for highest improvement

Solution UID

IK1

IK2

New distinct optimization choices

Ref

Best species

Worst species

Touched

Iters

Program

CMD

Dataset

Dataset file

CPU freq (MHz)

Cores

Platform

Replay

76d21ea259446749

1.10

1.12

-O3 -fno-compare-elim -fcse-skip-blocks -fdata-sections -fno-devirtualize-speculatively -fno-expensive-optimizations -ffast-math -ffloat-store -fipa-pta -fira-hoist-pressure -fno-isolate-erroneous-paths-dereference -fno-ivopts -floop-interchange -floop-parallelize-all -fmerge-all-constants -fno-branch-count-reg -ftoplevel-reorder -fno-partial-inlining -fpredictive-commoning -fno-sched-spec-load-dangerous -fno-tree-builtin-call-dce -ftree-coalesce-vars -ftree-pta -ftree-vectorize -funsafe-math-optimizations -finline-limit=0 --param predictable-branch-outcome=10 --param large-stack-frame=442 --param hot-bb-frequency-fraction=1543 --param lim-expensive=29 --param iv-consider-all-candidates-bound=36 --param omega-hash-table-size=205 --param max-cselib-memory-locations=756 --param sink-frequency-threshold=21 --param max-sched-region-insns=182 --param sched-mem-true-dep-cost=0 --param max-last-value-rtl=1305 --param max-sched-ready-insns=139 --param prefetch-latency=36 --param ira-loop-reserved-regs=4 --param loop-invariant-max-bbs-in-loop=3046 --param min-insn-to-prefetch-ratio=9 --param ipa-cp-array-index-hint-bonus=58 --param asan-stack=1

-O3

cbench-network-dijkstra

default

cdataset-dijkstra-0001

data.txt

HUAWEI P7-L10

Android 4.4.2

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