Hi Thomas , I think it is not only useful for debugging but also in general for supportability , for instance AIX ps (-mo THREAD) has this :
“…. The ps command writes the status of active processes and if the -m flag is given, displays the associated
kernel threads to standard output. While the -m flag displays threads associated with processes using extra
lines, you must use the -o flag with the THREAD field specifier to display extra thread-related columns. “
If possible , yes .
But I first just wanted to check for some functions in os_aix that still miss a “real” implementation …
Best regards, Matthias
From: Thomas Stüfe <thomas.stuefe@gmail.com>
Sent: Donnerstag, 10. Oktober 2019 11:34
To: Baesken, Matthias <matthias.baesken@sap.com>
Cc: ppc-aix-port-dev@openjdk.java.net
Subject: Re: pthread_setname_np (replacement) on AIX ?
Hi Matthias,
I dont think it exists on AIX:
We use it to set the thread name for debugging support (see os::set_native_thread_name). I personally think it is terribly important, since debugging on AIX in dbx is something we try to avoid :)
Do you plan to commonize the implementation of os::set_native_thread_name for all Posix platforms? If yes, this makes sense, but I would dlsym the function.
Cheers, Thomas
On Thu, Oct 10, 2019 at 9:37 AM Baesken, Matthias <matthias.baesken@sap.com> wrote:
Hello, currently pthread_setname_np is used on e.g. Linux and BSD
https://hg.openjdk.java.net/jdk/jdk/file/ccb7bf459cbd/src/hotspot/os/linux/os_linux.cpp#l5101
https://hg.openjdk.java.net/jdk/jdk/file/ccb7bf459cbd/src/hotspot/os/bsd/os_bsd.cpp#l3280
for setting unique names for a threads.
See the Linux manpage :
https://linux.die.net/man/3/pthread_setname_np
I noticed that the function seems to be available now on IBM i
https://www.ibm.com/support/knowledgecenter/en/ssw_ibm_i_72/apis/pthread_setname_np.htm
but I did not find it on AIX - are there plans to include it on AIX ? Or is it already available in some SP ?
If not is there a replacmenet function for it we could use ?
Thanks, Matthias