Hi,
here is a result of your benchmark on an SGI Indigo2 with a 195MHz
R10000 CPU running IRIX 6.5.11m and SGI compilers - so to say: the
fastest Indigo2 possible.
$ hinv
FPU: MIPS R10010 Floating Point Chip Revision: 0.0
CPU: MIPS R10000 Processor Chip Revision: 2.5
1 195 MHZ IP28 Processor
Main memory size: 448 Mbytes
Secondary unified instruction/data cache size: 1 Mbyte
Instruction cache size: 32 Kbytes
Data cache size: 32 Kbytes
[...]
$ uname -sR
IRIX64 6.5 6.5.11m
$ cc -ipa -Ofast -mips4 stream_d.c second_cpu.c -o stream_d_cpu
$ ./stream_d_cpu
-------------------------------------------------------------
This system uses 8 bytes per DOUBLE PRECISION word.
-------------------------------------------------------------
Array size = 1000000, Offset = 0
Total memory required = 22.9 MB.
Each test is run 10 times, but only
the *best* time for each is used.
-------------------------------------------------------------
Your clock granularity/precision appears to be 9999 microseconds.
Each test below will take on the order of 99999 microseconds.
(= 10 clock ticks)
Increase the size of the arrays if this shows that
you are not getting at least 20 clock ticks per test.
-------------------------------------------------------------
WARNING -- The above is only a rough guideline.
For best results, please be sure you know the
precision of your system timer.
-------------------------------------------------------------
Function Rate (MB/s) RMS time Min time Max time
Copy: 100.0001 0.1733 0.1600 0.1900
Scale: 100.0001 0.1703 0.1600 0.1900
Add: 104.3479 0.2424 0.2300 0.2700
Triad: 109.0909 0.2363 0.2200 0.2600
Function Rate (MB/s) RMS time Min time Max time
Copy: 100.0001 0.1735 0.1600 0.2000
Scale: 100.0001 0.1704 0.1600 0.2000
Add: 109.0908 0.2425 0.2200 0.2700
Triad: 109.0909 0.2363 0.2200 0.2600
Function Rate (MB/s) RMS time Min time Max time
Copy: 99.9999 0.1693 0.1600 0.1900
Scale: 100.0000 0.1756 0.1600 0.2100
Add: 104.3479 0.2392 0.2300 0.2600
Triad: 109.0909 0.2355 0.2200 0.2700
Function Rate (MB/s) RMS time Min time Max time
Copy: 100.0000 0.1714 0.1600 0.1900
Scale: 99.9998 0.1712 0.1600 0.1900
Add: 109.0910 0.2414 0.2200 0.2700
Triad: 109.0909 0.2353 0.2200 0.2600
Function Rate (MB/s) RMS time Min time Max time
Copy: 100.0000 0.1714 0.1600 0.1900
Scale: 99.9998 0.1712 0.1600 0.1900
Add: 109.0910 0.2414 0.2200 0.2700
Triad: 109.0909 0.2353 0.2200 0.2600
Function Rate (MB/s)
Copy: 100.0000
Scale: 99.9999
Add: 107.1937
Triad: 109.0909
--
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This archive was generated by hypermail 2b29 : Mon Jul 23 2001 - 09:56:56 CDT