Analog Devices Blackfin, Getting Started

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Benchmarks Against Other Processors
1-28 Getting Started With Blackfin Processors
I-CACHE: ON
D-CACHE: ON (write-back)
I-CACHE Size: 16KB
D-CACHE Size: 32KB
I-CACHE Setup: 4 Sub-banks/4 Ways, 32 Lines/Way
D-CACHE Setup: 2 Super-banks/4 Sub-banks/2 Ways, 64 Lines/Way
Another common representation of the Dhrystone benchmark is the
DMIPS (Dhrystone MIPS), obtained when the Dhrystone score is divided
by 1,757 (the number of Dhrystones per second obtained on the VAX
11/780, nominally a 1 MIPS machine).
The -O3 option includes function inlining which is considered “illegal”
with the Dhrystone benchmark. There are a specific set of rules to Dhrys-
tone, defined by the Embedded Benchmark Consortium (EEMBC), so
the -O3 results should be taken for informational purposes of what advan-
tage -O3 can give, not for published results of DMIPS.
Table 1-2 contains Dhrystone benchmark results.
Table 1-2. Dhrystone Benchmark Results
Compiler Flags Size in
Bytes Dhrystones per
Second Dhrystone
MIPS DMIPS/MHz
-Os -DNO_PROTOTYPES=1 13400 394011.0 224.25 0.3737
-O0 -DNO_PROTOTYPES=1 14748 336021.5 191.24 0.3187
-O1 -DNO_PROTOTYPES=1 13768 463821.9 263.98 0.4399
-O2 -DNO_PROTOTYPES=1 13872 523834.5 298.14 0.4969
-O3 -DNO_PROTOTYPES=1 13880 621890.6 353.95 0.5899
-O3 -fno-inline
-DNO_PROTOTYPES=1 13872 523834.5 298.14 0.4969