03:36 <agentzh> fche: even a hello world script takes 13sec in pass 4 when the cache is completely cold.

03:37 <agentzh> https://pastebin.com/i9EXkyMm

03:38 <agentzh> parallelism would certainly help a lot given that this is a 8 core/16 thread machine (core i9-9900k).

03:38 <agentzh> this is mostly about development. every time i recompmile stap and/or edit the .stp script, i would suffer the long wait.

03:39 <agentzh> even for small stp scripts.

03:39 <agentzh> no matter how fast my machine actually is.

03:40 <agentzh> stap generates the stap conf .h file serially (using >>) and compiles the kernel module serially (one gigantic xxx_src.c file).

03:41 <agentzh> this certainly could save a lot of time on a multi-core machine.

10:53 <fche> agentzh, stap buildrun.cxx uses make -j for the module, including the stapconf* testing,so there is definitely parallelism there

10:53 <fche> there is one painfully sequential bit - analyzing kernel tracepoint header files

10:53 <fche> is that hitting you?

10:53 <fche> intra-compiler parallelism is also a (researchy) project in gcc/etc. land fwiw