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theunreplicated / stressapptest

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stressapptest scores were different on many machines which had the same configures. #38

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
What steps will reproduce the problem?
1.run stressapptest with the command "stressapptest -s 3600"
2.
3.

What is the expected output? What do you see instead?
We expect the result should be 62000 on all machines, but the fact is that some 
machines get the result less than 40000, some machines get the result which is 
62000.
And it could be reproduced always.

What version of the product are you using? On what operating system?
Stats: SAT revision 1.0.4_autoconf, 64 bit binary
os version is CentOS 4.3, and kernel 2.6.32

Please provide any additional information below.
The machines which run fail had run pass when be changed to REDHAT 6.5.

Original issue reported on code.google.com by zhaojian...@gmail.com on 13 May 2015 at 10:37

GoogleCodeExporter commented 9 years ago 
Can you attach a logfile of the expected and unexpected results?

Original comment by nsanders@google.com on 13 May 2015 at 11:13

GoogleCodeExporter commented 9 years ago 
has anyone know this issue?Need your help.3q

Original comment by zhaojian...@gmail.com on 15 May 2015 at 12:34

GoogleCodeExporter commented 9 years ago 
It's the attach file

Original comment by zhaojian...@gmail.com on 15 May 2015 at 12:36

Attachments:

GoogleCodeExporter commented 9 years ago 
Looking forward to your reply.Thank you very much .

Original comment by zhaojian...@gmail.com on 15 May 2015 at 12:38

GoogleCodeExporter commented 9 years ago 
The issue is that it seems memory bandwidth is lower on some systems. 
Stats: Memory Copy: 223936544.00M at 62203.14MB/s
Stats: Memory Copy: 191988736.00M at 53328.45MB/s

A couple ideas for issues to check: 
* Do they have dimms with different dram type? 
* Are there any thermal events in the logfiles? Any temperature difference 
between the pass and fail systems cpu?
* Same cpu frequency and model? 
* The "i7z" tool can display turbo configs, which should show any variation 
perf by frequency or throttling in the cpu if you are using intel. 
* Any memory thermal throttling? 
* Anything running on the machine taking up cpu or dram cycles, maybe check top 
and /proc/interrupts? 
* Does the slowness also occur on other memory benchmarks?

Original comment by pud...@gmail.com on 17 May 2015 at 7:31