Mini Core Dumps - Dell S4820T Configuration Manual

To undo this command, use the no logging coredump server command.

Mini Core Dumps

Dell Networking OS supports mini core dumps on the application and kernel crashes. The mini core
dump applies to Master, Standby, and Member units.
Application and kernel mini core dumps are always enabled. The mini core dumps contain the stack
space and some other minimal information that you can use to debug a crash. These files are small files
and are written into flash until space is exhausted. When the flash is full, the write process is stopped.
A mini core dump contains critical information in the event of a crash. Mini core dump files are located in
flash:/ (root dir). The application mini core filename format is f10StkUnit<Stack_unit_no>.<Application
name>.acore.mini.txt. The kernel mini core filename format is f10StkUnit<Stack_unit_no>.kcore.mini.txt.
The following are sample filenames.
When a member or standby unit crashes, the mini core file gets uploaded to master unit. When the
master unit crashes, the mini core file is uploaded to new master.
The panic string contains key information regarding the crash. Several panic string types exist, and they
are displayed in regular English text to enable easier understanding of the crash cause.
Example of Application Mini Core Dump Listings
Dell#dir
Directory of flash:
1 drw- 16384 Jan 01 1980 00:00:00 +00:00 .
2 drwx 1536 Sep 03 2009 16:51:02 +00:00 ..
3 drw- 512 Aug 07 2009 13:05:58 +00:00 TRACE_LOG_DIR
4 d--- 512 Aug 07 2009 13:06:00 +00:00 ADMIN_DIR
5 -rw- 8693 Sep 03 2009 16:50:56 +00:00 startup-config
6 -rw- 8693 Sep 03 2009 16:44:22 +00:00 startup-config.bak
7 -rw- 156 Aug 28 2009 16:16:10 +00:00 f10StkUnit0.mrtm.acore.mini.txt
8 -rw- 156 Aug 28 2009 17:17:24 +00:00 f10StkUnit0.vrrp.acore.mini.txt
9 -rw- 156 Aug 28 2009 18:25:18 +00:00 f10StkUnit0.sysd.acore.mini.txt
10 -rw- 156 Aug 28 2009 19:07:36 +00:00 f10StkUnit0.frrp.acore.mini.txt
11 -rw- 156 Aug 31 2009 16:18:50 +00:00 f10StkUnit2.sysd.acore.mini.txt
12 -rw- 156 Aug 29 2009 14:28:34 +00:00 f10StkUnit0.ipm1.acore.mini.txt
13 -rw- 156 Aug 31 2009 16:14:56 +00:00 f10StkUnit0.acl.acore.mini.txt
flash: 3104256 bytes total (2959872 bytes free)
Dell#
Example of a Mini Core Text File
VALID MAGIC
-----------------PANIC STRING -----------------
panic string is :<null>
---------------STACK TRACE START---------------
0035d60c <f10_save_mmu+0x120>:
00274f8c <panic+0x144>:
0024e2b0 <db_fncall+0x134>:
0024dee8 <db_command+0x258>:
0024d9c4 <db_command_loop+0xc4>:
002522b0 <db_trap+0x158>:
0026a8d0 <mi_switch+0x1b0>:
0026a00c <bpendtsleep>:
----------------STACK TRACE END----------------
S-Series Debugging and Diagnostics
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