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--- tutorials:troubleshooting:memory [2015/01/16 17:06]
miconda [OS Memory Reports]
+++ tutorials:troubleshooting:memory [2015/05/14 13:55]
miconda [PKG With System Malloc]
@@ Line 63: / Line 63: @@
   * if the number of subscribers, traffic is constant, no larger data was reloaded (e.g., dispacher, lcr), then there is very likely a memory leak that has to be discovered and fixed
-===== Troubleshooting =====
 ===== Memory Manager Debugging =====
@@ Line 148: / Line 147: @@
 if($i>2000)
 if($a->u.is_free==0)
+printf "=========== non-free fragment: %d\n", $i
+p $a
+p (void*)((char*)($a)+sizeof(struct qm_frag))
+printf "----------- content\n"
 p *$a
 end
+end
+set $a = ((struct qm_frag*)((char*)($a)+sizeof(struct qm_frag)+((struct qm_frag*)$a)->size+sizeof(struct qm_frag_end)))
+set $i = $i + 1
+end
+</code>
+An alternative is to print all used chunks, but be aware that it may take some time:
+<code c>
+set $i=0
+set $a = mem_block->first_frag
+while($a < mem_block->last_frag_end)
+if($a->u.is_free==0)
+printf "=========== non-free fragment: %d\n", $i
+p $a
+p (void*)((char*)($a)+sizeof(struct qm_frag))
+printf "----------- content\n"
+p *$a
 end
 set $a = ((struct qm_frag*)((char*)($a)+sizeof(struct qm_frag)+((struct qm_frag*)$a)->size+sizeof(struct qm_frag_end)))
@@ Line 167: / Line 189: @@
 gdb --batch --command=/tmp/kamailio-dump-used-pkg.gdb /usr/sbin/kamailio 21907
 </code>
+===== PKG With System Malloc =====
+Kamailio can be compiled to use system malloc and free for PKG needs. You have to remove the PKG_MALLOC define from Makefile.defs and can add DBG_SYS_MALLOC to get more verbosity with memory operations in debug mode.
+Next is a diff showing the changes in Makefile.defs, but note that lines may vary on your specific Kamailio version.
+<code c>
+diff --git a/Makefile.defs b/Makefile.defs
+index 3890668..12ca37a 100644
+--- a/Makefile.defs
++++ b/Makefile.defs
+@@ -621,7 +621,7 @@ C_DEFS= $(extra_defs) \
+         -DSER_VER=$(SER_VER) \
+         -DCFG_DIR='"$(cfg_target)"'\
+         -DRUN_DIR='"$(run_target)"'\
+-        -DPKG_MALLOC \
++        -DDBG_SYS_MALLOC \
+         -DSHM_MEM  -DSHM_MMAP \
+         -DDNS_IP_HACK \
+         -DUSE_MCAST \
+</code>
+After updating Makefile.defs recompile and reinstall.
+Other tools available out there (e.g., valgrind) can be then used to track the PKG memory operations done by Kamailio.
 ===== OS Memory Reports =====

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