From S.Zander at murdoch.edu.au  Mon Jun  6 02:28:56 2016
From: S.Zander at murdoch.edu.au (Sebastian Zander)
Date: Mon, 6 Jun 2016 14:28:56 +0800
Subject: [Web10g-user] web10g kernel 3.18 issues
Message-ID: <57551828.7010803@murdoch.edu.au>

Hi,

We have encountered some issues with web10g on kernel 3.18.

We downloaded the modified kernel source tagged 3.18 from the git 
repository, patched the vanilla 3.18.33 kernel with that and then 
compiled the kernel. On the userspace side we downloaded the latest 
version of the userspace code from the git repository and compiled it.

In general web10g works but we have issues with missing variables. Most 
notably a lot of the variables from the perf table are missing when we 
run web10g-logger as we did before with the older version for kernel 
3.17. Basically all variables after ElapsedMicroSecs are missing when we 
run web10g-logger and the issue is not specific to web10g-logger as we 
have exactly the same problem when running web10g-readvars.

Now we noticed something strange. When omitting the first missing 
variable (StartTimeStamp) by excluding it in the mask, e.g.

web10g-logger -m ffffffffffffefff

we suddenly got all of the missing variables from the perf table (apart 
from StartTimeStamp of course). The same fix also works with 
web10g-readvars.

Also from the stack table we seem to be unable to CurReasmQueue, 
MaxReasmQueue, EarlyRetrans, EarlyRetransDelay (all the ones below the 
two variables which are now commented out in the kernel source). We 
haven played with the mask values for these.

Has somebody here encountered the same issue and can shed some light on 
this whether this is a bug or whether something has changed with respect 
to how we should use web10g? Are there any more recent versions than the 
one in the git repository? Any recent 3. or even 4. kernels that 
reportedly work with web10g?

Thanks,

Sebastian

-- 
Sebastian Zander
http://profiles.murdoch.edu.au/myprofile/sebastian-zander/