Re: [Valgrind-users] top and massif about jack2 memory usage

[Maurice v. S. <ma...@bl...>]

Valgrind doesn't track memory allocation through mmap, mremap and brk. 

You can use massif with the option --pages-as-heap=yes to track those instead of malloc etc. 

][ Maurice van Swaaij ][ 

----- Original Message -----

| From: "Leonardo Gabrielli" <l.g...@un...>
| To: val...@li...
| Sent: Thursday, May 29, 2014 12:50:52 PM
| Subject: [Valgrind-users] top and massif about jack2 memory usage

| Dear all,
| I'm looking into valgrind + massif, to track down where the massive
| memory requirements of jackdmp (Jack2) come from.
| I'm new to its usage and perhaps I miss something regarding memory
| attribution with the top command, but here's what I face:
| According to top, jackd takes 216Mb VIRT, 147M RES, 96Mb SH.
| If I run with valgrind --tool=massif the log I get from massif is a
| mere
| 6Mb of memory. Either valgrind is right and I do not know what the
| top
| figures are about, either valgrind can't track down all that large
| memory locked by jack. According to my knowledge jack is used to get
| slightly less than 100MB, so I guess the second is the most probable
| answer.

| FYI: Jack runs with 4 threads, one of which is in a privileged PAM
| group
| with unlimited memory locking and realtime (SCHED_FIFO) priority.

| Maybe massif can't see the thread which allocates most of the memory?

| Regards

| Leonardo

| --

| Dr. Leonardo Gabrielli, PhD student
| A3Lab - Dept. Information Engineering
| Università Politecnica delle Marche
| via Brecce Bianche 12, 60131, Ancona, Italy
| Skype: leonardo.gabrielli
| Web: a3lab.dii.univpm.it/people/leonardo-gabrielli
| <http://a3lab.dii.univpm.it/people/leonardo-gabrielli>

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