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Hardware News : Sam440EP memory tests published
Posted by AmiKit on 2007/3/9 0:26:01 (4764 reads) News by the same author
Hardware News

ACube Systems published new information about their awaited PPC hardware. For more information please visit the Sam440EP product page.

Direct links to PDFs:
Sam440EP memory tests
Memory test performed on reference board


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Author Thread
joerg
Published: 2007/3/9 8:24  Updated: 2007/3/9 8:24
Just can't stay away
Joined: 12/01/2006
From: Germany
Comments: 1092
 Re: Sam440EP memory tests published
For comparison here are the results of stream_d on an AmigaOne XE with 750FX/800 (executed on AmigaOS4, but of course the OS makes no difference for such benchmarks):
-------------------------------------------------------------
This system uses 8 bytes per DOUBLE PRECISION word.
-------------------------------------------------------------
Array 
size 2000000Offset 0
Total memory required 
45.8 MB.
Each test is run 10 timesbut only
the 
*besttime for each is used.
-------------------------------------------------------------
Your clock granularity/precision appears to be 3 microseconds.
Each test below will take on the order of 127572 microseconds.
   (= 
42524 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 resultsplease be sure you know the
precision of your system timer
.
-------------------------------------------------------------
Function      
Rate (MB/s)   RMS time     Min time     Max time
Copy
:         152.6996       0.2104       0.2096       0.2112
Scale
:        139.7448       0.2300       0.2290       0.2312
Add
:          145.2072       0.3316       0.3306       0.3326
Triad
:        142.7344       0.3375       0.3363       0.3393



Please note that the stream benchmarks aren't optimized, with functions optimized for PPC like the newlib.library memcpy() and memset(), or the AmigaOS4 final IExec->CopyMem[Quick]() and IUtility->SetMem(), you get much faster speeds than with trivial code like in the stream benchmarks or the clib2 memcpy()/memset() functions.
ikir
Published: 2007/3/9 12:30  Updated: 2007/3/9 12:30
Not too shy to talk
Joined: 11/27/2006
From: SYS:Prefs/
Comments: 374
 Re: Sam440EP memory tests published
It seems much more faster than A1.
COBRA
Published: 2007/3/9 15:10  Updated: 2007/3/9 15:23
Not too shy to talk
Joined: 11/24/2006
From:
Comments: 370
 Re: Sam440EP memory tests published
Faster memspeed is important for Sam440 to compensate for the lack of L2 cache. Some dnetc benchmark results would be interesting, it'd give us a better idea of how overall performance compares to a G3/800 in some computing-intensive tasks.

Some more comparison benchmarks can be found here.
srupprecht
Published: 2007/3/9 16:03  Updated: 2007/3/9 16:03
Just popping in
Joined: 01/06/2007
From:
Comments: 11
 Re: Sam440EP memory tests published
That's a G4 (7455 I believe) @ 800mhz (A1):

-------------------------------------------------------------
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 2 microseconds.
Each test below will take on the order of 65684 microseconds.
(= 32842 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: 186.0894 0.0862 0.0860 0.0867
Scale: 166.2200 0.0964 0.0963 0.0969
Add: 173.7731 0.1383 0.1381 0.1386
Triad: 171.0790 0.1404 0.1403 0.1408
Antique
Published: 2007/3/11 1:25  Updated: 2007/3/11 1:25
Home away from home
Joined: 11/30/2006
From: Norway
Comments: 2561
 Re: Sam440EP memory tests published
Looks promising,but would love the see the sam at +1ghz.
LiveForIt
Published: 2007/3/13 18:24  Updated: 2007/3/13 18:24
Home away from home
Joined: 11/20/2006
From: Norway
Comments: 3366
 Re: Sam440EP memory tests published
Sam440 is starting to look interesting now

I hope the sam440 will come whit faster CPU at some point?
joerg
Published: 2007/3/16 16:59  Updated: 2007/3/16 16:59
Just can't stay away
Joined: 12/01/2006
From: Germany
Comments: 1092
 Re: Sam440EP memory tests published
Quote:
Sam440 is starting to look interesting now

I hope the sam440 will come whit faster CPU at some point?
It's using the fastest 440 CPU with FPU already, the other 440 CPUs which are available with higher clock speeds and/or have a L2 cache don't have a FPU.
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