Michal Hocko wrote: > On Fri 06-06-14 18:11:14, Felipe Contreras wrote: > > On Fri, Jun 6, 2014 at 5:33 AM, Felipe Contreras > > <felipe.contreras@xxxxxxxxx> wrote: > > > On Fri, Jun 6, 2014 at 4:16 AM, Michal Hocko <mhocko@xxxxxxx> wrote: > > > > > >> Mel has a nice systemtap script (attached) to watch for stalls. Maybe > > >> you can give it a try? > > > > > > Is there any special configurations I should enable? > > > > > > I get this: > > > semantic error: unresolved arity-1 global array name, missing global > > > declaration?: identifier 'name' at /tmp/stapd6pu9A:4:2 > > > source: name[t]=execname() > > > ^ > > > > > > Pass 2: analysis failed. [man error::pass2] > > > Number of similar error messages suppressed: 71. > > > Rerun with -v to see them. > > > Unexpected exit of STAP script at > > > /home/felipec/Downloads/watch-dstate-new.pl line 320. > > > > Actually I debugged the problem, and it's that the format of the > > script is DOS, not UNIX. After changing the format the script works. > > Ups, I've downloaded it from our bugzilla so maybe it just did some > tricks with the script. > > > However, it's not returning anything. It's running, but doesn't seem > > to find any stalls. > > Intereting. It was quite good at pointing at stalls. How are you > measuring those stalls during your testing? I'm not measuring them, I simply grab a GUI window and move it around while the big file is being copied, when the issue happens the window stops moving, and the mouse, everything hangs for a time, then it resumes, then hangs again... the interactivity is bad. -- Felipe Contreras -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>