fche changed the topic of #systemtap to: http://sourceware.org/systemtap; email systemtap@sourceware.org if answers here not timely, conversations may be logged
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<irker532> systemtap: fche systemtap.git:refs/heads/master * release-2.9-467-g616ec7a / : pre-release docs rebuild http://tinyurl.com/j5f3u8t
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<irker532> systemtap: fche systemtap.git:refs/tags/release-3.0 * release-3.0 / : pre-release docs rebuild http://tinyurl.com/kb48rak
<irker532> systemtap: fche systemtap.git:refs/heads/master * release-3.0-1-g6b2b2be / NEWS configure configure.ac doc/SystemTap_Beginners_Guide/en-US/Book_Info.xml systemtap.spec testsuite/configure testsuite/configure.ac: routine configury prep for future 3.1 release http://tinyurl.com/gl7awh6
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<irker290> systemtap: fche systemtap.git:refs/heads/master * release-3.0-2-g10c48d4 / staprun/mainloop.c testsuite/systemtap.base/staprunwait.exp testsuite/systemtap.base/staprunwait.stp: PR19874: reset 60s alarm for "stap -c CMD" http://tinyurl.com/jdzaev4
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<irker053> systemtap: fche systemtap.git:refs/heads/master * release-3.0-3-ga64b31f / session.cxx stapdyn/stapdyn.cxx staprun/common.c: copyright year bump http://tinyurl.com/zurwpzn
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<mnaser> I'm using systemtap to look at some io problems that im dealing with, i got a list of all writes but some processes are doing open()s on non-relative file paths, is there a while to gt the cwd/pwd in systemtap probe?
<fche> hi mnaser
<mnaser> hello
<fche> off the top of my head, we don't have a function for that already in the library, but probably doable
<mnaser> my little workaround was ... lsof -p the pid as soon as i saw it but that's obviously not ideal
<fche> e.g. the pfiles.stp sample lists open files belonging to a process, kind of like lsof
<mnaser> that can be a good asset
<mnaser> oh that's a lot of code.
<mnaser> heh
<fche> it does its dirty work by looking inside the kernel task_struct -> files[]
<fche> the cwd is somewhere in the vicinity
<fche> but yeah, too much code & too much embedded-C rather than script
<fche> but it's a possible way forward in the short term
<fche> see also the env_var() function in the tapset
<mnaser> fche: what about username (instead of uid)
<fche> that does another task_struct search
<fche> user names don't exist at the kernel level, only numbers
<fche> one could pass the /etc/passwd database into a stap script e.g. using a tool to generate a stap script fragment that initializes a lookup table with items like that
<mnaser> fche: i see, makes sense... basically trying to see which user is generating the most iops but i think i can deal with uid and convert to user later (at least at this point, this is what im comfortable with in stap)
<fche> (you can have a little /bin/sh or perl wrapper script that generates the lookup table and the rest of the stap script)
<mnaser> yeah that's what im thinking
<fche> hm, maybe we should have a stap cron job that generates such a lookup tables into /usr/share/systemtap/tapset periodically, moohahaha
<mnaser> im happy i got to find out what was the process stealing iops
<fche> sounds good
<irker053> systemtap: fche systemtap.git:refs/heads/master * release-3.0-4-gd84e7e5 / buildrun.cxx: RHBZ1321628: temporarily suppress CONFIG_STACK_VALIDATION= http://tinyurl.com/zrrry27
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