Not sure if this is at all related to the deadlock I believe I found in sawman/directfb that I posted to the directfb-dev mailing list, but it sounds familiar. I provided copious information that demonstrates the source of the deadlock, which occurs when one process is actively drawing when another attempts to start up and add a window in a new layer.
Richard Niels Roest wrote: > Hi Edison. > > No idea, so I will give you some hints. > > I noticed that when you first start e.g. df_window, and only then > testman, some redraws are missed, but this is a minor issue and does not > cause locking up of the system. This is on a recent X11 system. Your > versions look ok to me. > > If you cannot use gdb to see where the application is stuck, I would > advise to build directfb with debug and trace options: --enable-debug > and --enable-trace. If you then stop an application with control-C, it > will dump a stracktrace of all the threads running. > > Also, you can check /proc/fusion/0 for the files there, to see if there > is a lock still pending at the moment. look at the file called skirmish, > here you can see which process ID is taking the lock, and - if there are > any - which IDs are trying to take it, and therefore waiting. If you > have a deadlock then obviously on skirmish X app A waits for app B, and > on skirmish Y app B waits for app A. > > Greets > Niels > > > Edison_lin-林俊翰 wrote: >> Hi, >> Please allow me to make a complement. I think maybe it's due to the >> deadlock of competing fusion skirmish locks. I found two un-dismiss >> locks in the df_window side, and one un-dismiss lock in the testman >> side. I guess it may be the case that df_window got a lock first, and >> then testman tried to get the lock but failed, and at this moment >> df_window tried to get the lock again, which results in a deadlock >> situation...I'm not sure about the answer, but I'll keep tracing. Any >> suggestion is welcome. >> >> Appreciate, >> Edison Lin >> >> ----- Original Message ----- From: "Edison_lin-林俊翰" >> <edison_...@gemtek.com.tw> >> To: <directfb-users@directfb.org> >> Cc: "Niels Roest" <ni...@directfb.org> >> Sent: Friday, August 14, 2009 12:09 PM >> Subject: Re: A question about SaWMan >> >> >>> Hi, >>> Thanks for your replying. I did enable the multi-application core >>> option, and install the linux fusion module as well. The following is >>> the log from testman after I started testman first and then >>> df_window, for your reference. I use SaWMan 1.4.0, Directfb-1.2.0, >>> Directfb-example-1.2.0, and linux-fusion-8.0.0. >>> >>> I add some debug message in the code. The testman did sense the >>> running directfb application and try to add one's windows to its >>> control, but locked. Is it related to the versions I use ? >>> >>> <==================================log==================================================> >>> >>> ./testman >>> (*) SaWMan/TestMan: Initializing... >>> >>> ~~~~~~~~~~~~~~~~~~~~~~~~~~| DirectFB 1.2.0 |~~~~~~~~~~~~~~~~~~~~~~~~~~ >>> (c) 2001-2008 The world wide DirectFB Open Source Community >>> (c) 2000-2004 Convergence (integrated media) GmbH >>> ---------------------------------------------------------------- >>> >>> (*) DirectFB/Core: Multi Application Core. (2009-08-10 16:11) >>> (*) 316,dfb_core_create >>> (*) Fusion/SHM: Using MADV_REMOVE (2.6.23.1 >= 2.6.19.2) >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) Direct/Thread: Started 'Fusion Dispatch' (25555) [MESSAGING >>> OTHER/OTHER 0/0] <10485760>... >>> (*) 322,dfb_core_create >>> (*) 335,dfb_core_create >>> (*) 337,dfb_core_create >>> (*) 97,fusion_skirmish_prevail >>> (ignore) >>> (*) 97,fusion_skirmish_prevail >>> (*) 124,fusion_arena_enter >>> (*) 97,fusion_skirmish_prevail >>> (ignore) >>> (*) 97,fusion_skirmish_prevail >>> (*) Direct/Thread: Started 'VT Switcher' (-1) [CRITICAL OTHER/OTHER >>> 0/0] <10485760>... >>> (*) 97,fusion_skirmish_prevail >>> (ignore) >>> (*) 97,fusion_skirmish_prevail >>> (*) Direct/Thread: Started 'Keyboard Input' (-1) [INPUT OTHER/OTHER >>> 0/0] <10485760>... >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) DirectFB/Input: Keyboard 0.9 (directfb.org) >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) Direct/Thread: Started 'Linux Input' (-1) [INPUT OTHER/OTHER 0/0] >>> <10485760>... >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) DirectFB/Input: Macintosh mouse button emulatio (1) 0.1 >>> (directfb.org) >>> (*) 97,fusion_skirmish_prevail >>> (*) Direct/Thread: Started 'Linux Input' (-1) [INPUT OTHER/OTHER 0/0] >>> <10485760>... >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) DirectFB/Input: AT Translated Set 2 keyboard (2) 0.1 (directfb.org) >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) Direct/Thread: Started 'Linux Input' (-1) [INPUT OTHER/OTHER 0/0] >>> <10485760>... >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) DirectFB/Input: ImPS/2 Generic Wheel Mouse (3) 0.1 (directfb.org) >>> (*) 97,fusion_skirmish_prevail >>> (*) Direct/Thread: Started 'Linux Input' (-1) [INPUT OTHER/OTHER 0/0] >>> <10485760>... >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) DirectFB/Input: Power Button (FF) (4) 0.1 (directfb.org) >>> (*) 97,fusion_skirmish_prevail >>> (*) Direct/Thread: Started 'PS/2 Input' (-1) [INPUT OTHER/OTHER 0/0] >>> <10485760>... >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) DirectFB/Input: IMPS/2 Mouse 1.0 (directfb.org) >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) DirectFB/Genefx: MMX detected and enabled >>> (*) DirectFB/Graphics: MMX Software Rasterizer 0.6 (directfb.org) >>> (*) 97,fusion_skirmish_prevail >>> (ignore) >>> (*) 97,fusion_skirmish_prevail >>> (*) DirectFB/Core/WM: SaWMan 0.2 (directfb.org) >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) 171,dfb_wm_core_initialize >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) 168,register_process >>> (*) 171,register_process >>> (*) 174,register_process >>> (*) 181,dfb_wm_core_initialize >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) 345,dfb_core_create >>> (*) 97,fusion_skirmish_prevail >>> (*) 362,dfb_core_create >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) SaWMan: Initializing stack 0x20138400 for tier 0x255c3000, 0x0, >>> layer 0, context 0x20017000 [3]... >>> (*) 97,fusion_skirmish_prevail >>> (ignore) >>> (*) 97,fusion_skirmish_prevail >>> (*) SaWMan/Init: Layer 0: 800x600, RGB16, options: 0 >>> (*) SaWMan/Init: Border 0: 800x600, RGB16, options: 8 >>> (*) 97,fusion_skirmish_prevail >>> (*) 97,fusion_skirmish_prevail >>> (*) SaWMan/TestMan: Process added (25534) [1]! >>> (*) SaWMan/TestMan: Process added (25567) [2]! >>> (*) SaWMan/TestMan: Window preconfig (20,120-300x200)! >>> (*) SaWMan/TestMan: Window added (20,120-300x200)! >>> (*) 745,window_reconfig >>> (*) 377,LayoutWindowAdd >>> (*) 307,MosaicAddWindow >>> (*) 404,ISaWManManager_Lock >>> (*) 97,fusion_skirmish_prevail >>> >>> <==================================log >>> end==================================================> >>> >>> >>> Appreciate, >>> Edison Lin >>> >>> ----- Original Message ----- From: "Niels Roest" <ni...@directfb.org> >>> To: "Edison_Lin-林俊翰" <edison_...@gemtek.com.tw> >>> Cc: <directfb-...@directfb.org> >>> Sent: Thursday, August 13, 2009 5:30 PM >>> Subject: Re: A question about SaWMan >>> >>> >>>> Hi Edison. >>>> >>>> first off, you are posting to the CVS/change control list; Can you >>>> please use the "users" list for any following questions? >>>> >>>> you are right, testman must be run first, and then df_window and other >>>> applications should be started. This is exactly how I am using it also. >>>> Did you ./configure with --enable-multi, and are you insmod'ding the >>>> fusion kernel module? Otherwise it is not possible to run DirectFB with >>>> multiple applications at the same time (of which testman is already >>>> one). >>>> >>>> If this is not the case, it would be interesting to know where the lock >>>> happens. >>>> >>>> hth >>>> Niels >>>> >>>> Edison_lin-林俊翰 wrote: >>>>> Hi, >>>>> If I ran df_window and other directfb applications before testman, >>>>> everything went fine; I got a screen of tiled windows. But why can't I >>>>> run these applications after testman ? It seems to trap into a sawman >>>>> lock for the application to run, and after I removed the lock/unlock >>>>> part, then the applications can be run. I think it's more reasonable >>>>> for a window manager application to be run first, and any directfb >>>>> application added later can be managed through it. >>>>> Appreciate, >>>>> Edison Lin >>>>> ------------------------------------------------------------------------ >>>>> >>>>> >>>>> _______________________________________________ >>>>> directfb-cvs mailing list >>>>> directfb-...@directfb.org >>>>> http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-cvs >>>>> >>>> >>>> -- >>>> >>>> .------------------------------------------. >>>> | DirectFB - Hardware accelerated graphics | >>>> | http://www.directfb.org/ | >>>> "------------------------------------------" >>>> >>>> >> _______________________________________________ >> directfb-users mailing list >> directfb-users@directfb.org >> http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-users > > _______________________________________________ directfb-users mailing list directfb-users@directfb.org http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-users
