Joshua Root wrote:
Emil Lundberg wrote:
Is there documentation backing up the
claim
that 64-bit ppc code is slower on 64-bit ppc machines than 32-bit
ppc code?
I've seen benchmark numbers that show this. I'll see if I can dig
them up.
OK, I found some of the comparisons I was thinking of: a Linux-based one
with several benchmarks[1], and two Darwin-based ones using Geekbench,
on Tiger[2] and Leopard[3].
[1] <http://lixom.net/~olof/64bit-perf.pdf>
[2] <http://www.geekpatrol.ca/2006/09/32-bit-vs-64-bit-performance/>
[3]
<http://www.primatelabs.ca/blog/2007/10/leopard-performance-october-2007/>
I'll have access to a G5 in a few days' time, so if no one beats me to
it, I'll run some other comparisons.
Well, no one beat me to it. ;-)
I've added a use_64_bit variant to the nbench-byte and ubench ports, and
run them with and without the variant on a Power Mac G5 and a Mac Pro.
Results are attached.
- Josh
BYTEmark* Native Mode Benchmark ver. 2 (10/95)
Index-split by Andrew D. Balsa (11/97)
Linux/Unix* port by Uwe F. Mayer (12/96,11/97)
TEST : Iterations/sec. : Old Index : New Index
: : Pentium 90* : AMD K6/233*
--------------------:------------------:-------------:------------
NUMERIC SORT : 1016.6 : 26.07 : 8.56
STRING SORT : 336.83 : 150.50 : 23.30
BITFIELD : 5.578e+08 : 95.68 : 19.99
FP EMULATION : 131.17 : 62.94 : 14.52
FOURIER : 34338 : 39.05 : 21.93
ASSIGNMENT : 39.525 : 150.40 : 39.01
IDEA : 6300 : 96.36 : 28.61
HUFFMAN : 2314.7 : 64.19 : 20.50
NEURAL NET : 47.232 : 75.87 : 31.92
LU DECOMPOSITION : 1696.5 : 87.89 : 63.46
==========================ORIGINAL BYTEMARK RESULTS==========================
INTEGER INDEX : 80.539
FLOATING-POINT INDEX: 63.856
Baseline (MSDOS*) : Pentium* 90, 256 KB L2-cache, Watcom* compiler 10.0
==============================LINUX DATA BELOW===============================
CPU :
L2 Cache :
OS : Darwin 9.3.0
C compiler : /usr/bin/gcc-4.0
libc :
MEMORY INDEX : 26.286
INTEGER INDEX : 16.433
FLOATING-POINT INDEX: 35.417
Baseline (LINUX) : AMD K6/233*, 512 KB L2-cache, gcc 2.7.2.3, libc-5.4.38
* Trademarks are property of their respective holder.
BYTEmark* Native Mode Benchmark ver. 2 (10/95)
Index-split by Andrew D. Balsa (11/97)
Linux/Unix* port by Uwe F. Mayer (12/96,11/97)
TEST : Iterations/sec. : Old Index : New Index
: : Pentium 90* : AMD K6/233*
--------------------:------------------:-------------:------------
NUMERIC SORT : 712.54 : 18.27 : 6.00
STRING SORT : 313.06 : 139.88 : 21.65
BITFIELD : 1.4698e+08 : 25.21 : 5.27
FP EMULATION : 77.002 : 36.95 : 8.53
FOURIER : 21208 : 24.12 : 13.55
ASSIGNMENT : 14.218 : 54.10 : 14.03
IDEA : 3299.1 : 50.46 : 14.98
HUFFMAN : 1082.4 : 30.01 : 9.58
NEURAL NET : 19.188 : 30.82 : 12.97
LU DECOMPOSITION : 724.83 : 37.55 : 27.11
==========================ORIGINAL BYTEMARK RESULTS==========================
INTEGER INDEX : 41.011
FLOATING-POINT INDEX: 30.335
Baseline (MSDOS*) : Pentium* 90, 256 KB L2-cache, Watcom* compiler 10.0
==============================LINUX DATA BELOW===============================
CPU :
L2 Cache :
OS : Darwin 8.11.0
C compiler : /usr/bin/gcc-4.0
libc :
MEMORY INDEX : 11.696
INTEGER INDEX : 9.258
FLOATING-POINT INDEX: 16.825
Baseline (LINUX) : AMD K6/233*, 512 KB L2-cache, gcc 2.7.2.3, libc-5.4.38
* Trademarks are property of their respective holder.
BYTEmark* Native Mode Benchmark ver. 2 (10/95)
Index-split by Andrew D. Balsa (11/97)
Linux/Unix* port by Uwe F. Mayer (12/96,11/97)
TEST : Iterations/sec. : Old Index : New Index
: : Pentium 90* : AMD K6/233*
--------------------:------------------:-------------:------------
NUMERIC SORT : 659.58 : 16.92 : 5.56
STRING SORT : 314.64 : 140.59 : 21.76
BITFIELD : 1.3774e+08 : 23.63 : 4.94
FP EMULATION : 74.505 : 35.75 : 8.25
FOURIER : 21333 : 24.26 : 13.63
ASSIGNMENT : 13.964 : 53.14 : 13.78
IDEA : 2160.9 : 33.05 : 9.81
HUFFMAN : 991.69 : 27.50 : 8.78
NEURAL NET : 19.6 : 31.49 : 13.24
LU DECOMPOSITION : 720.07 : 37.30 : 26.94
==========================ORIGINAL BYTEMARK RESULTS==========================
INTEGER INDEX : 37.115
FLOATING-POINT INDEX: 30.544
Baseline (MSDOS*) : Pentium* 90, 256 KB L2-cache, Watcom* compiler 10.0
==============================LINUX DATA BELOW===============================
CPU :
L2 Cache :
OS : Darwin 8.11.0
C compiler : /usr/bin/gcc-4.0
libc :
MEMORY INDEX : 11.396
INTEGER INDEX : 7.927
FLOATING-POINT INDEX: 16.941
Baseline (LINUX) : AMD K6/233*, 512 KB L2-cache, gcc 2.7.2.3, libc-5.4.38
* Trademarks are property of their respective holder.
BYTEmark* Native Mode Benchmark ver. 2 (10/95)
Index-split by Andrew D. Balsa (11/97)
Linux/Unix* port by Uwe F. Mayer (12/96,11/97)
TEST : Iterations/sec. : Old Index : New Index
: : Pentium 90* : AMD K6/233*
--------------------:------------------:-------------:------------
NUMERIC SORT : 1194.3 : 30.63 : 10.06
STRING SORT : 340.05 : 151.95 : 23.52
BITFIELD : 4.8938e+08 : 83.95 : 17.53
FP EMULATION : 147.34 : 70.70 : 16.31
FOURIER : 39643 : 45.09 : 25.32
ASSIGNMENT : 35.573 : 135.36 : 35.11
IDEA : 6496.6 : 99.36 : 29.50
HUFFMAN : 2462 : 68.27 : 21.80
NEURAL NET : 57.25 : 91.97 : 38.69
LU DECOMPOSITION : 1802.5 : 93.38 : 67.43
==========================ORIGINAL BYTEMARK RESULTS==========================
INTEGER INDEX : 82.202
FLOATING-POINT INDEX: 72.882
Baseline (MSDOS*) : Pentium* 90, 256 KB L2-cache, Watcom* compiler 10.0
==============================LINUX DATA BELOW===============================
CPU :
L2 Cache :
OS : Darwin 9.3.0
C compiler : /usr/bin/gcc-4.0
libc :
MEMORY INDEX : 24.373
INTEGER INDEX : 18.025
FLOATING-POINT INDEX: 40.423
Baseline (LINUX) : AMD K6/233*, 512 KB L2-cache, gcc 2.7.2.3, libc-5.4.38
* Trademarks are property of their respective holder.
Unix Benchmark Utility v.0.3
Copyright (C) July, 1999 PhysTech, Inc.
Author: Sergei Viznyuk <[EMAIL PROTECTED]>
http://www.phystech.com/download/ubench.html
Darwin 9.3.0 Darwin Kernel Version 9.3.0: Fri May 23 00:49:16 PDT 2008;
root:xnu-1228.5.18~1/RELEASE_I386 i386
Ubench CPU: 1275777
Ubench MEM: 574584
--------------------
Ubench AVG: 925180
Unix Benchmark Utility v.0.3
Copyright (C) July, 1999 PhysTech, Inc.
Author: Sergei Viznyuk <[EMAIL PROTECTED]>
http://www.phystech.com/download/ubench.html
Darwin 8.11.0 Darwin Kernel Version 8.11.0: Wed Oct 10 18:26:00 PDT 2007;
root:xnu-792.24.17~1/RELEASE_PPC Power Macintosh
Ubench CPU: 200397
Ubench MEM: 396729
--------------------
Ubench AVG: 298563
Unix Benchmark Utility v.0.3
Copyright (C) July, 1999 PhysTech, Inc.
Author: Sergei Viznyuk <[EMAIL PROTECTED]>
http://www.phystech.com/download/ubench.html
Darwin 8.11.0 Darwin Kernel Version 8.11.0: Wed Oct 10 18:26:00 PDT 2007;
root:xnu-792.24.17~1/RELEASE_PPC Power Macintosh
Ubench CPU: 200783
Ubench MEM: 244881
--------------------
Ubench AVG: 222832
Unix Benchmark Utility v.0.3
Copyright (C) July, 1999 PhysTech, Inc.
Author: Sergei Viznyuk <[EMAIL PROTECTED]>
http://www.phystech.com/download/ubench.html
Darwin 9.3.0 Darwin Kernel Version 9.3.0: Fri May 23 00:49:16 PDT 2008;
root:xnu-1228.5.18~1/RELEASE_I386 i386
Ubench CPU: 1336511
Ubench MEM: 560924
--------------------
Ubench AVG: 948717
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