Re: The sixty second pmc howto

Joseph Koshy writes:
 > >>>> "ag" == "Andrew Gallatin <gallatin_at_cs.duke.edu>" said:
 > 
 > ag> My only problem with hwpmc is that it will not work for kernel
 > ag> modules.
 > 
 > The following patch implements support for profiling of
 > dynamically loaded kernel modules and dlopen()'ed (userland)
 > shared objects.

Cool! It seems to work, though not the way I was hoping for :(

When I profile my module, I do:

% sudo pmcstat -S unhalted-cycles -O sample.out
% pmcstat -R sample.out -g

This leaves me with one .gmon file for each loaded module:

% ls -l k8-bu-cpu-clk-unhalted/
total 1566
-rw-r--r--  1 gallatin  wheel    19070 Mar 21 13:11 hwpmc.ko.gmon
-rw-r--r--  1 gallatin  wheel     8892 Mar 21 13:11
if_myri10ge.ko.gmon
-rw-r--r--  1 gallatin  wheel  1547196 Mar 21 13:11 kernel.gmon


For a few modules, I suppose it is OK.  But it makes it hard to
see the "big picture" when a number of modules are loaded.  
Is there any chance you have enough information to hack
together a view similar to oprofile's opreport -l? Or
(even better) opreport -ld

Drew