This table summarizes the results of benchmarking tests on various machines, obtained by calculating complex Fourier transforms of varying size. The number n (in the second through fourth column headings) represents the number of complex floats passed to the Fourier transform (1 complex float = 8 bytes of data, so, for example, 2^12 = 4096 complex floats = 32768 bytes). The results recorded here are the number of floating point operations per second (1 Mflop = 1 million operations per second), and milliseconds per transform. The greater the Mflops and the lower the milliseconds, the better. We are most concerned with the performance at n=2^20, the column highlighted in red.

For easier comparison, a graph of each machine's fastest overall results can be found here.

Manufacturer and Model

n=2^12

n=2^16

n=2^20

CPU type and MHz

Memory Cache

Bus Speed

RAM

Compiler

DEC Alpha XL300

185 Mflops

1.33 ms/fft

133 Mflops

39.4 ms/fft

77.4 Mflops

1350 ms/fft

Alpha EV5 21164
300MHz

8K data/8K instruction
96K internal/2M L2

256M

ccc

DEC Alpha PW500au

249 Mflops

0.988 ms/fft

159 Mflops

33.1 ms/fft

127 Mflops

827 ms/fft

Alpha 21164 EV56
500MHz

96K internal, 2M L3

128M

gcc version
egcs-2.91.66

DEC Alpha PW500au

328 Mflops

0.748 ms/fft

173 Mflops

30.3 ms/fft

87.6 Mflops

1200 ms/fft

Alpha 21164 EV56
500MHz

96K internal, 2M L3

128M

ccc version
6.2.9.504-2

Compaq Alpha XP1000

711 Mflops

0.346 ms/fft

192 Mflops

27.2 ms/fft

141 Mflops

742 ms/fft

Alpha 21264 EV6
500MHz

64K data/64K instruction
4M L2

83MHz

256M

gcc version
egcs-2.91.66

Compaq Alpha XP1000

715 Mflops

0.344 ms/fft

189 Mflops

27.7 ms/fft

126 Mflops

831 ms/fft

Alpha 21264 EV6
500MHz

64K data/64k instruction
4M L2

83MHz

256M

ccc version
6.2.9.504-2

Gateway Professional M1000

609 Mflops

0.403 ms/fft

380 Mflops

13.8 ms/fft

280 Mflops

374 ms/fft

Intel PIII (Coppermine)
1GHz

256K

133MHz

512M

gcc version
egcs-2.91.66

Gateway Select SB PC

1030 Mflops

0.239 ms/fft

371 Mflops

14.1 ms/fft

254 Mflops

413 ms/fft

AMD Athlon
1.2GHz

128K L1/256K L2

133MHz

512M

gcc version
egcs-2.91.66

PCWisconsin PIII

581 Mflops

0.423 ms/fft

376 Mflops

13.9 ms/fft

261 Mflops

402 ms/fft

Intel PIII (Coppermine)
933MHz

133MHz

512M

gcc version
egcs-2.91.66

Dell Dimension 8100

762 Mflops

0.322 ms/fft

231 Mflops

22.7 ms/fft

208 Mflops

504 ms/fft

Intel P4 1.4GHz

256K

100MHz

512M

gcc version
egcs-2.95.2

Dell Precision 220

634 Mflops

0.388 ms/fft

217 Mflops

24.2 ms/fft

210 Mflops

500 ms/fft

Intel PIII 1GHz

256K

133MHz

512M

gcc version
egcs-2.91.66

Compaq Alpha XP1000

927 Mflops

0.265 ms/fft

213 Mflops

24.6 ms/fft

146 Mflops

720 ms/fft

Alpha 21264 EV67 @ 667 MHz

64K inst. and data, 4MB L2

83MHz

512MB

DEC cc 3.11

Linux Networx LNXI Athlon 1.2 DDR

1038 Mflops

0.237 ms/fft

193 Mflops

27.2 ms/fft

175 Mflops

599 ms/fft

AMD Athlon 1.2GHz

256K L2

266MHz

512MB DDR

gcc version egcs-2.91.66

IBM xSeries 200

551 Mflops

0.446 ms/fft

229 Mflops

22.9 ms/fft

217 Mflops

483 ms/fft

Intel PIII 866 MHz

256K

133MHz

590MB

gcc version egcs-2.91.66

IBM xSeries 220

593 Mflops

0.414 ms/fft

259 Mflops

20.3 ms/fft

250 Mflops

420 ms/fft

Intel PIII 933 MHz

256K

133MHz

512MB

gcc version egcs-2.91.66

Intel D815EEA2L PIII

634 Mflops

0.388 ms/fft

377 Mflops

13.9 ms/fft

287 Mflops

365 ms/fft

Intel PIII 1 GHz

256K

133MHz

512MB

gcc version egcs-2.91.66

$Id: benchmarking_results.html,v 1.7 2003/01/06 23:04:07 kflasch Exp $

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