Wiki code for Tips and Tricks

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1: ==MDB Tips and Tricks==
2: 
3: This page will serve as a repository of useful tools, documentation, procedures, or anything else relating to MDB.  If you have a favorite dcmd invocation, a new MDB module, or a script built around MDB, please post the information to the [[MDB forum>>http://www.opensolaris.org/jive/forum.jspa?forumID=4]] and we’ll make sure to archive it here.
4: 
5: 
6: ===MDB Cheatsheet===
7: 
8: A great quick reference put together by [[Jonathan Adams>>http://blogs.sun.com/jwadams]].  You can find the PDF version [[here>>attach:mdb-cheatsheet.pdf]], and a postscript version [[here>>attach:mdb-cheatsheet.ps]].
9: 
10: ===Stack Munger===
11: 
12: [[munges>>attach:munges]] is a neat shell script written by [[Dave Powell>>http://blogs.sun.com/dep]] to coalesce similar stacks.  See it in action:
13: 
14: {{{
15:     > ::walk thread | ::findstack
16:     stack pointer for thread fffffffffbc21c40: fffffffffbc44050
17:     [ fffffffffbc44050 ~_resume~_from~_idle+0xde() ]
18:       fffffffffbc44080 swtch+0xdf()
19:       fffffffffbc44120 sched+0x8ef()
20:       fffffffffbc44170 main+0x478()
21:       fffffffffbc44180 ~_start+0x95()
22:     stack pointer for thread fffffe8000005c80: fffffe8000005ae0
23:       fffffe8000005b30 ~_interrupt+0x190()
24:       fffffe8000005b70 lock~_set~_spl+0x1d()
25:       fffffe8000005bc0 restore~_mstate+0xc7()
26:     ...
27:     > ::walk thread | ::findstack ! munges
28:     73      ==================================  tp: fffffe800000bc80
29:     	swtch+0xdf()
30:     	cv_wait+0x6a()
31:     	taskq~_thread+0x1ef()
32:     	thread~_start+8()
33:     53      ==================================  tp: fffffe80fded0000
34:     	swtch+0xdf()
35:     	cv~_wait~_sig~_swap~_core+0x177()
36:     	cv~_wait~_sig~_swap+0xb()
37:     	cv~_waituntil~_sig+0xd7()
38:     	poll~_common+0x52b()
39:     	pollsys+0xbe()
40:     	sys~_syscall32+0x1ff()
41:     ...
42: }}}
43: 
44: This is incredibly useful when diagnosing system hangs (as threads tend to pile up on the same locks) or eliminating unnecessary output.
45: 
46: ===Useful Blog Entries===
47: 
48: Here’s a list of MDB-related blog entries.  This is a combination of manual
49: searching and [[Technorati Tags>>http://www.technorati.com/tag/mdb]].
50: To get your blog on this radar for the future, make sure to include a Technorati
51: MDB tag in your post.  Just click on the ’Date’ link below to get to the
52: associated post.  If you have an old post that should be featured here, email Eric dot Schrock at sun dot com.
53: 
54: |=Date                                                                |=Author   |=Title                                 
55: | [[7/18/07>>http://blogs.sun.com/levon/entry/solaris_xen_update]] | John Levon | Solaris Xen Update |
56: | [[5/20/07>>http://jjmora.es/Solaris_Buceando_en_el_Kernel_con_mdb_III]] | JJMora | Buceando en el Kernel con mdb (III) |
57: | [[1/10/07>>http://blogs.sun.com/peteh/entry/pfiles_1_locked_files_and]] | Peter Harvey | pfiles(1), locked files and a pinch of salt |
58: | [[12/16/06>>http://blogs.sun.com/chrisg/entry/how_to_shoot_yourself_in]] | Chris Gerhard | How to shoot yourself in the foot with MDB |
59: | [[3/8/06>>http://blogs.sun.com/elowe/entry/examining_the_anatomy_of_a]] | Eric Lowe | Examining the Anatomy of a Process |
60: | [[3/6/06>>http://blogs.sun.com/elowe/entry/observing_the_solaris_kernel]] | Eric Lowe | Examining the Solaris Kernel |
61: | [[6/24/05>>http://blogs.sun.com/roller/page/fintanr?entry=mdb_eval]]				| Fintan Ryan	   | MDB ::eval					|
62: | [[6/24/05>>http://blogs.sun.com/roller/page/eschrock?entry=mdb_puzzle_take_two]]		| Eric Schrock	   | MDB puzzle, take two			|
63: | [[6/23/05>>http://blogs.sun.com/roller/page/eschrock?entry=mdb_puzzle]]				| Eric Schrock	   | MDB puzzle					|
64: | [[6/17/05>>http://blogs.sun.com/roller/page/eschrock/20050617#gdb_to_mdb_migration_part]]	| Eric Schrock	   | GDB to MDB migration, part two		|
65: | [[6/17/05>>http://blogs.sun.com/roller/page/amehta/20050617#a_race_erased]]			| Ashish Mehta     | A race erased				|
66: | [[6/15/05>>http://blogs.sun.com/roller/page/rmc/20050613#the_vm_system_formally_known]]		| Rich McDougall   | Adding your own performance statistics to Solaris |
67: | [[6/15/05>>http://blogs.sun.com/roller/page/akolb/20050615#mdb_for_streams]]			| Alexander Kolbasov | MDB for STREAMS				|
68: | [[6/14/05>>http://blogs.sun.com/roller/page/mws/20050614#sendmail_died_in_a_two]]		| Mike Shapiro     | Sendmail Died in a Two SIGALRM Fire	|
69: | [[6/14/05>>http://blogs.sun.com/roller/page/simmonmt/20050614]]					| Matt Simmons     | KMDB design				|
70: | [[6/14/05>>http://blogs.sun.com/roller/page/ahl/20050614#debugging_cross_calls_on_opensolaris]] | Adam Leventhal   | Debugging cross calls on Solaris		|
71: | [[6/14/05>>http://blogs.sun.com/roller/page/jwadams/20050614#the_implementation_of_findleaks]]  | Jonathan Adams   | The implementation of ::findleaks          |
72: | [[6/14/05>>http://blogs.sun.com/roller/page/wfiveash/20050614#playing_with_solaris_memory_debuggers]] | Will Fiveash | Playing with Solaris memory debuggers	|
73: | [[6/14/05>>http://blogs.sun.com/roller/page/jan/20050614#my_mdb_writing_adventure]]		| Jan Parcel	   | My mdb-writing adventure			|
74: | [[6/14/05>>http://blogs.sun.com/roller/page/erickustarz/20050614#nfsv4_client_s_recovery_messages]] | Eric Kustarz | NFSv4 Client’s Recovery Messages		|
75: | [[6/14/05>>http://blogs.sun.com/roller/page/aalok/20050614#debugging_on_sparc]]			| Alok Aggarwal	   | Debugging on SPARC				|
76: | [[6/14/05>>http://blogs.sun.com/roller/page/sch/20050614#libuutil_and_designing_for_debuggability]] | Stephen Hahn | libuutil and designing for debuggability   |
77: | [[6/14/05>>http://blogs.sun.com/roller/page/esaxe/20050614#debugging_solaris_scheduling_problems_and]] | Eric Saxe | Debugging Solaris Scheduling Problems	|
78: | [[6/14/05>>http://blogs.sun.com/roller/page/barts/20050614#doing_the_jitter_bug]]		| Bart Smaalders   | Doing the jitter bug			|
79: | [[6/8/05>>http://blogs.sun.com/roller/page/yu/20050614#how_to_write_a_kmod]]			| Yu Xiangning	   | Hellow world in a KMDB module		|
80: | [[5/24/05>>http://blogs.sun.com/roller/page/saurabh_mishra/20050524#cpupart_v]]                 | Saurabh Mishra   | ::cpupart -v for mdb(1m)                   |
81: | [[5/11/05>>http://blogs.sun.com/roller/page/eschrock/20050510#gdb_to_mdb]]			| Eric Schrock	   | GDB to MDB migration, part one		|
82: | [[4/1/05>>http://blogs.sun.com/roller/page/mrbenchmark/20050401#memory_page_coalescing_update_and]] | MrBenchmark  | Memory page coalescing update and Solaris 10 |
83: | [[2/15/05>>http://blogs.sun.com/roller/page/fintanr/20050215#mdb_core]]				| Fintan Ryan	   | mdb core					|
84: | [[2/2/05>>http://blogs.sun.com/roller/page/eschrock/20050202#whatthread]]			| Eric Schrock	   | ::whatthread and MDB modules		|
85: | [[11/19/05>>http://blogs.sun.com/roller/page/eschrock/20041120#debugging_on_amd64_part_two]]	| Eric Schrock	   | Debugging on AMD64 - Part Two		|
86: | [[10/7/04>>http://blogs.sun.com/roller/page/jwadams/20041007#an_mdb_1_cheat_sheet]]             | Jonathan Adams   | mdb(1) background, intro, and cheatsheet   |
87: | [[10/3/04>>http://blogs.sun.com/roller/page/alanc/20041005#an_idle_hack]]			| Alan Coopersmith | An idle hack				|
88: | [[9/30/04>>http://blogs.sun.com/roller/page/comand/20040930#learn_mdb_in_30_minutes]]		| comand           | Learn mdb in 30 minutes			|
89: | [[9/23/04>>http://blogs.sun.com/roller/page/eschrock/20040922#debugging_hard_problems]]		| Eric Schrock	   | Debugging hard problems			|
90: | [[9/15/04>>http://blogs.sun.com/roller/page/ace/20040915#mdb_an_introduction_drilling_sigsegv]] | Stacey Marshall  | mdb: drilling sigsegv; by way of an introduction |
91: | [[8/19/04>>http://blogs.sun.com/roller/page/eschrock/20040822#kernel_debugging_part_1_kmdb]]	| Eric Schrock	   | Kernel debugging with KMDB			|
92: | [[7/13/04>>http://blogs.sun.com/roller/page/ahl/20040713#solaris_10_top_11_20]]			| Adam Leventhal   | Number 11 of 20: libumem			|
93: | [[6/23/04>>http://blogs.sun.com/roller/page/DaveM/20040623#using_mdb_to_figure_out]]		| Dave Marquardt   | Using MDB to figure out mysterious program behavior |
94: | [[6/20/04>>http://blogs.sun.com/roller/page/eschrock/20040620#my_kingdom_for_a_crash]]		| Eric Schrock	   | My kingdom for a crash dump		|
95: | [[6/16/04>>http://blogs.sun.com/roller/page/tpenta/20040615#kmdb_replaces_kadb_as_of]]		| Alan Hargreaves  | Kmdb replaces kadb as of build 61		|
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