02:15 <promach> fche: thanks

02:24 <promach> systemtap is quite useful !!!

02:46 <promach> strange, sudo stap --example para-callgraph-verbose.stp 'module("/lib/modules/4.18.6-041806-generic/kernel/drivers/riffa/riffa.ko").function("queue_count_to_index")' does not print anything

02:47 <promach> fche: https://github.com/promach/riffa/blob/full_duplex/driver/linux/circ_queue.c#L83-L86

03:11 <promach> I have solved the problem

03:19 <promach> https://paste.ubuntu.com/p/8CtGTVMT8H/

03:19 <promach> fche: strange to have zero call count to queue_count_to_index() when pop_circ_queue() has a few queue_count_to_index()

10:08 <fche> promach, it could be an inlining/optimization effect

12:18 <promach> fche: ok, I got it

16:12 <s1nbad> i'm trying to run the following script: "stap -v -w -r 4.15.0-30-generic -e 'probe vfs.read {printf("read performed\n"); exit()}'

16:13 <s1nbad> it gets to pass 3, and it fails to compile with several errors (some of which are really warnings)

16:14 <s1nbad> what does this mean and how do i fix it. i'm on 4.15.0.

16:25 <s1nbad> ok, the issue is probably i'm using a version from 2015. gonna get the latest :P

16:51 <fche> yup, that happens