прога стрим
kim1963 9 июня, 2009 - 14:02.кто может пояснить: как правильно интерпретировать результаты теста
Welcome to the Haiku shell.
~> /boot/share1/stream59/stream
------------------------------------------------------------–
STREAM version $Revision: 5.9 $
------------------------------------------------------------–
This system uses 8 bytes per DOUBLE PRECISION word.
------------------------------------------------------------–
Array size = 2000000, Offset = 0
Total memory required = 45.8 MB.
Each test is run 10 times, but only
the *best* time for each is used.
------------------------------------------------------------–
Printing one line per active thread
.
------------------------------------------------------------–
Your clock granularity/precision appears to be 2 microseconds.
Each test below will take on the order of 13952 microseconds.
(= 6976 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) Avg time Min time Max time
Copy: 2578.9874 0.0126 0.0124 0.0127
Scale: 2548.9836 0.0128 0.0126 0.0131
Add: 2551.0194 0.0190 0.0188 0.0192
Triad: 2560.8241 0.0189 0.0187 0.0191
------------------------------------------------------------–
Solution Validates
брал отсюда http://www.bebits.com/app/4042/
та же песня,
та же песня, но гайка сборки 30911–GCC4
This system uses 8 bytes per DOUBLE PRECISION word.
------------------------------------------------------------–
Array size = 2000000, Offset = 0
Total memory required = 45.8 MB.
Each test is run 10 times, but only
the *best* time for each is used.
------------------------------------------------------------–
Printing one line per active thread .
------------------------------------------------------------–
Your clock granularity/precision appears to be 2 microseconds.
Each test below will take on the order of 13752 microseconds.
(= 6876 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) Avg time Min time Max time
Copy: 2563.6825 0.0126 0.0125 0.0128
Scale: 2549.3774 0.0127 0.0126 0.0130
Add: 2549.9331 0.0190 0.0188 0.0191
Triad: 2563.0022 0.0189 0.0187 0.0190
------------------------------------------------------------–
Solution Validates
------------------------------------------------------------–
~>
Function Rate (MB/s)
Function Rate (MB/s) Avg time Min time Max time
Copy: 2578.9874 0.0126 0.0124 0.0127
Scale: 2548.9836 0.0128 0.0126 0.0131
Add: 2551.0194 0.0190 0.0188 0.0192
Triad: 2560.8241 0.0189 0.0187 0.0191
Это результаты теста, а сравнить с другими можно здесь: http://www.cs.virginia.edu/stream/peecee/Bandwidth.html или на bebits в камментах меряются :)
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