CPU benchmark - how many GFLOPs does your multicore machine do?

**graysky** · December 7th, 2008

The primary goal of the Linpack benchmark is to measure Gigaflops of PCs or PC clusters. It has been used for Super-Computers, but also desktop machines. The software solves mathematical problem - arbitrary large set of linear equations, and displays the rate of solving, measured in Gigaflops (Floating Point Operations per Second).

It is very efficient at using multi-core processors. Here is a screen-shot of my conky during the test run:

You can download it from Intel's page: Linpack download link.

Installation is trivial:

Code:

$ cd Downloads
$ tar zxvf l_lpk_p_10.1.0.002.tgz

Before you run it, you need to know how much physical memory you have and enter the appropriate values into the software for it's problem sizes and leading dimensions variables. These tell it how much memory to use.

Here is a rough guide:

1 gig of physical memory = 7000
2 gig of physical memory = 13700
4 gig of physical memory = 20000
8 gig of physical memory = 30000

If you're running the amd64 LINUX, use the 'xlinpack_xeon64' executable. If you're running the standard i686 or below LINUX, use the 'xlinpack_xeon32' executable.

Code:

$ cd linpack_10.1.0/benchmarks/linpack/
$ ./xlinpack_xeon64

Now you'll see:

Code:

Input data or print help ? Type [data]/help :

Simply hit the <ENTER> key and enter the value you found from the table above. My system has 4 gigs, so I'll use '20000' for the first two questions, and '4' for the last two questions.

Code:

Input data or print help ? Type [data]/help :

Number of equations to solve (problem size): 20000
Leading dimension of array: 20000
Number of trials to run: 4
Data alignment value (in Kbytes): 4
Current date/time: Sun Dec 14 19:00:27 2008

CPU frequency:    3.400 GHz
Number of CPUs: 4
Number of threads: 4

Parameters are set to:

Number of tests                             : 1
Number of equations to solve (problem size) : 20000
Leading dimension of array                  : 20000
Number of trials to run                     : 4    
Data alignment value (in Kbytes)            : 4    

Maximum memory requested that can be used = 3200404096, at the size = 20000

============= Timing linear equation system solver =================

Size   LDA    Align. Time(s)    GFlops   Residual     Residual(norm)
20000  20000  4      111.673    47.7658  4.546476e-10 4.024627e-02
20000  20000  4      111.306    47.9233  4.546476e-10 4.024627e-02
20000  20000  4      111.339    47.9091  4.546476e-10 4.024627e-02
20000  20000  4      111.733    47.7400  4.546476e-10 4.024627e-02

Performance Summary (GFlops)

Size   LDA    Align.  Average  Maximal
20000  20000  4       47.8345  47.9233 

End of tests

My CPU is an X3360 @ 8.5x400=3.40 GHz by the way.

Please post your results!

**eragon100** · December 7th, 2008

My intel core 2 duo e6300 @ 1.86 GHZ:

ichigo-soul-reaper@soul-society:~/Desktop/linpack_10.1.0/benchmarks/linpack$ ./xlinpack_xeon64
Input data or print help ? Type [data]/help :
data
Number of equations to solve (problem size): 18500
Leading dimension of array: 18500
Number of trials to run: 1
Data alignment value (in Kbytes): 4
Current date/time: Sun Dec 7 14:00:58 2008

CPU frequency: 1.862 GHz
Number of CPUs: 2
Number of threads: 2

Parameters are set to:

Number of tests : 1
Number of equations to solve (problem size) : 18500
Leading dimension of array : 18500
Number of trials to run : 1
Data alignment value (in Kbytes) : 4

Maximum memory requested that can be used = 2738374096, at the size = 18500

============= Timing linear equation system solver =================

Size LDA Align. Time(s) GFlops Residual Residual(norm)
18500 18500 4 475.641 8.8760 3.158189e-10 3.270656e-02

Performance Summary (GFlops)

Size LDA Align. Average Maximal
18500 18500 4 8.8760 8.8760

End of tests

Well, ubuntu runs extremely fast on this PC, so I'
m happy

**Funnnny** · December 7th, 2008

Mine is T8300 2x2.4G

CPU frequency: 2.394 GHz
Number of CPUs: 2
Number of threads: 2

Parameters are set to:

Number of tests : 1
Number of equations to solve (problem size) : 13700
Leading dimension of array : 13700
Number of trials to run : 4
Data alignment value (in Kbytes) : 4

Maximum memory requested that can be used = 1501798096, at the size = 13700

============= Timing linear equation system solver =================

Size LDA Align. Time(s) GFlops Residual Residual(norm)
13700 13700 4 167.233 10.2528 1.865160e-10 3.518248e-02
13700 13700 4 124.721 13.7475 1.865160e-10 3.518248e-02
13700 13700 4 126.239 13.5823 1.865160e-10 3.518248e-02
13700 13700 4 119.224 14.3814 1.865160e-10 3.518248e-02

Performance Summary (GFlops)

Size LDA Align. Average Maximal
13700 13700 4 12.9910 14.3814

End of tests

**Mr.Carramba** · February 18th, 2009

This was so much fun

Thank you for posting link and info!

CPU frequency: 2.327 GHz
Number of CPUs: 8
Number of threads: 8

Parameters are set to:

Number of tests : 1
Number of equations to solve (problem size) : 30000
Leading dimension of array : 30000
Number of trials to run : 4
Data alignment value (in Kbytes) : 4

Maximum memory requested that can be used = 7200604096, at the size = 30000

============= Timing linear equation system solver =================

Size LDA Align. Time(s) GFlops Residual Residual(norm)
30000 30000 4 303.953 59.2257 7.597450e-10 2.994923e-02
30000 30000 4 303.596 59.2952 7.597450e-10 2.994923e-02
30000 30000 4 303.480 59.3179 7.597450e-10 2.994923e-02
30000 30000 4 303.716 59.2718 7.597450e-10 2.994923e-02

Performance Summary (GFlops)

Size LDA Align. Average Maximal
30000 30000 4 59.2776 59.3179

End of tests

**VladTepes** · June 18th, 2009

Do we have similar test suites for AMD x86_64 machines too? The software package I found on Netlib takes ages to 'make' on my machine, and then hangs it.

-Vlad

**wapko** · July 9th, 2009

i looked everywhere for a gigaflops benchmark. then i found this thread.. was fooling with hpl and stuff..

intel q9550 goodness

Code:

CPU frequency:    3.604 GHz
Number of CPUs: 4
Number of threads: 4

Parameters are set to:

Number of tests                             : 1
Number of equations to solve (problem size) : 20000
Leading dimension of array                  : 20000
Number of trials to run                     : 4    
Data alignment value (in Kbytes)            : 4    

Maximum memory requested that can be used = 3200404096, at the size = 20000

============= Timing linear equation system solver =================

Size   LDA    Align. Time(s)    GFlops   Residual     Residual(norm)
20000  20000  4      106.650    50.0153  3.498382e-10 3.096834e-02
20000  20000  4      106.519    50.0769  3.498382e-10 3.096834e-02
20000  20000  4      106.199    50.2279  3.498382e-10 3.096834e-02
20000  20000  4      106.996    49.8535  3.498382e-10 3.096834e-02

Performance Summary (GFlops)

Size   LDA    Align.  Average  Maximal
20000  20000  4       50.0434  50.2279 

End of tests

would like to see an OC i7 do this test..

**Waly_Br** · October 16th, 2009

xlinpack_xeon32Input data or print help ? Type [data]/help :

Number of equations to solve (problem size): 20000
Leading dimension of array: 20000
Number of trials to run: 4
Data alignment value (in Kbytes): 4
Current date/time: Fri Oct 16 18:35:18 2009

CPU frequency: 2.261 GHz
Number of CPUs: 2
Number of threads: 2

Parameters are set to:

Number of tests : 1
Number of equations to solve (problem size) : 20000
Leading dimension of array : 20000
Number of trials to run : 4
Data alignment value (in Kbytes) : 4

Maximum memory requested that can be used = 3200404096, at the size = 20000

============= Timing linear equation system solver =================

Size LDA Align. Time(s) GFlops Residual Residual(norm)
20000 20000 4 343.637 15.5226 3.560856e-10 3.152138e-02
20000 20000 4 355.292 15.0134 3.560856e-10 3.152138e-02
20000 20000 4 342.751 15.5627 3.560856e-10 3.152138e-02
20000 20000 4 344.322 15.4917 3.560856e-10 3.152138e-02

Performance Summary (GFlops)

Size LDA Align. Average Maximal
20000 20000 4 15.3976 15.5627

End of tests
My laptop =)

**Sealbhach** · October 17th, 2009

Memory 2GB
2 x Intel Core2 Duo T7250 @2.00 GHz

Code:

Number of equations to solve (problem size): 13700
Leading dimension of array: 13700
Number of trials to run: 4
Data alignment value (in Kbytes): 4
Current date/time: Sat Oct 17 01:08:55 2009

CPU frequency:    1.995 GHz
Number of CPUs: 2
Number of threads: 2

Parameters are set to:

Number of tests                             : 1
Number of equations to solve (problem size) : 13700
Leading dimension of array                  : 13700
Number of trials to run                     : 4    
Data alignment value (in Kbytes)            : 4    

Maximum memory requested that can be used = 1501798096, at the size = 13700

============= Timing linear equation system solver =================

Size   LDA    Align. Time(s)    GFlops   Residual     Residual(norm)
13700  13700  4      176.729    9.7019   1.865160e-10 3.518248e-02
13700  13700  4      184.014    9.3178   1.865160e-10 3.518248e-02
13700  13700  4      192.283    8.9171   1.865160e-10 3.518248e-02
13700  13700  4      198.220    8.6500   1.865160e-10 3.518248e-02

Performance Summary (GFlops)

Size   LDA    Align.  Average  Maximal
13700  13700  4       9.1467   9.7019  

End of tests

**dalesd** · October 18th, 2009

34.2 GFlops! Woo!
Intel Q9300 Quad Core @ 2.5 GHz.

Code:

CPU frequency:    2.505 GHz
Number of CPUs: 4
Number of threads: 4

============= Timing linear equation system solver =================

Size   LDA    Align. Time(s)    GFlops   Residual     Residual(norm)
20000  20016  4      156.735    34.0329  3.625560e-10 3.209415e-02
20000  20016  4      156.792    34.0205  3.625560e-10 3.209415e-02
20000  20016  4      155.871    34.2214  3.625560e-10 3.209415e-02
20000  20016  4      155.858    34.2243  3.625560e-10 3.209415e-02

Performance Summary (GFlops)

Size   LDA    Align.  Average  Maximal
20000  20016  4       34.1248  34.2243