Discussion:
How to Perform Regression Test
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梁政
1970-01-01 00:00:00 UTC
Permalink
Hi




I am learning to use and want to do some modifications on gem5. I can make my version work. But I am not sure whether its' results are right. It seems I should use regression test to check it.




However, there is little information about how to perform a canonical regression test. Only 1 question 1 in StackOverflow (https://stackoverflow.com/questions/52279971/how-to-run-the-gem5-unit-tests). And I cannot get the point of the official website(http://gem5.org/Regression_Tests).




And I even don't know how to set paths for the example regression test with the gem5 official python script (http://gem5.org/Regression_Tests). I have SPEC2000, but I don't know how to get mcf and twolf defined in config/common/cpu2000.py work. I think it is too horrible.




I am a beginner. I wonder if there are some test scripts to test correctness? What do the gem5 developers use? Should I use the latest gem5-dev version to obtain some reference statistics?

Thanks very much.




Best Regards

Zheng Liang

EECS, Peking University
Ciro Santilli
2018-11-14 13:13:00 UTC
Permalink
Hi Liang,


Please don't email both gem5-dev and gem5-users as it creates two entries on the mailing list trackers.


I don't think there is any more testing besides what is described in that answer.


I do think it is not enough, and there are some efforts in progress, but fixing it is also hard, especially for stats correctness, since it is hard to make a golden reference.


So, I recommend that you select the content that you care about, and make sure that it runs and produces the expected functional results to start with.


As for SPEC2000, I have never run it myself, but I'm pretty certain it will work. Give it a try and describe what you did and how it failed in detail. I don't think the stat checks there are passing however.

The closest to master version that you use, the more likely it is that you will get help, so stick to master if you can.
________________________________
From: gem5-dev <gem5-dev-***@gem5.org> on behalf of $BNB@/(B <***@pku.edu.cn>
Sent: Wednesday, November 14, 2018 12:13:40 PM
To: gem5-***@gem5.org; gem5-***@gem5.org
Subject: [gem5-dev] How to Perform Regression Test

Hi




I am learning to use and want to do some modifications on gem5. I can make my version work. But I am not sure whether its' results are right. It seems I should use regression test to check it.




However, there is little information about how to perform a canonical regression test. Only 1 question 1 in StackOverflow (https://stackoverflow.com/questions/52279971/how-to-run-the-gem5-unit-tests). And I cannot get the point of the official website(http://gem5.org/Regression_Tests).




And I even don't know how to set paths for the example regression test with the gem5 official python script (http://gem5.org/Regression_Tests). I have SPEC2000, but I don't know how to get mcf and twolf defined in config/common/cpu2000.py work. I think it is too horrible.




I am a beginner. I wonder if there are some test scripts to test correctness? What do the gem5 developers use? Should I use the latest gem5-dev version to obtain some reference statistics?

Thanks very much.




Best Regards

Zheng Liang

EECS, Peking University
Jason Lowe-Power
2018-11-19 21:19:21 UTC
Permalink
Please see https://gem5.googlesource.com/public/gem5/+/master/TESTING.md
for details on how to use the new regression tests. We will be migrating to
this interface as soon as we have ported the old tests (hopefully soon).

Jason
Post by Ciro Santilli
Hi Liang,
Please don't email both gem5-dev and gem5-users as it creates two entries
on the mailing list trackers.
I don't think there is any more testing besides what is described in that answer.
I do think it is not enough, and there are some efforts in progress, but
fixing it is also hard, especially for stats correctness, since it is hard
to make a golden reference.
So, I recommend that you select the content that you care about, and make
sure that it runs and produces the expected functional results to start
with.
As for SPEC2000, I have never run it myself, but I'm pretty certain it
will work. Give it a try and describe what you did and how it failed in
detail. I don't think the stat checks there are passing however.
The closest to master version that you use, the more likely it is that you
will get help, so stick to master if you can.
------------------------------
*Sent:* Wednesday, November 14, 2018 12:13:40 PM
*Subject:* [gem5-dev] How to Perform Regression Test
Hi
I am learning to use and want to do some modifications on gem5. I can make
my version work. But I am not sure whether its' results are right. It seems
I should use regression test to check it.
However, there is little information about how to perform a canonical
regression test. Only 1 question 1 in StackOverflow (
https://stackoverflow.com/questions/52279971/how-to-run-the-gem5-unit-tests).
And I cannot get the point of the official website(
http://gem5.org/Regression_Tests).
And I even don't know how to set paths for the example regression test
with the gem5 official python script (http://gem5.org/Regression_Tests).
I have SPEC2000, but I don't know how to get mcf and twolf defined in
config/common/cpu2000.py work. I think it is too horrible.
I am a beginner. I wonder if there are some test scripts to test
correctness? What do the gem5 developers use? Should I use the latest
gem5-dev version to obtain some reference statistics?
Thanks very much.
Best Regards
Zheng Liang
EECS, Peking University
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