Re: OOM conditions
On Fri, Nov 06, 2009 at 04:50:53PM +, Tomeu Vizoso wrote: On Wed, Nov 4, 2009 at 14:16, Martin Dengler mar...@martindengler.com wrote: On Fri, Oct 30, 2009 at 11:22:13PM +0100, Tomeu Vizoso wrote: On Fri, Oct 30, 2009 at 16:58, Richard A. Smith rich...@laptop.org wrote: Working the table at the Boston book festival I was reminded how painful the OOM stuff is on a gen 1. The demo machines were in this state a lot as each visitor would open up a new program. Basically you have to just turn the unit off and restart as trying to recover is futile. What if activities had a higher oom_score? Would that protect enough the processes that once killed require a system restart (X, shell, etc)? See patch vs sugar-toolkit HEAD below[1] (I can backport to 0.82 if wanted). Maybe would be better to have the shell do that? So it works for non-python activities. Patch inline below. Regards, Tomeu Martin Thanks, Tomeu Martin (untested) patch against http://cgit.sugarlabs.org/sugar-toolkit/mainline/tree/src/sugar/activity/activityfactory.py : From 4bd6fb9f7f245c2aed92d6964746627d0c96cbec Mon Sep 17 00:00:00 2001 From: Martin Dengler mar...@martindengler.com Date: Sat, 7 Nov 2009 10:55:16 + Subject: [PATCH] sacrifice activities to the OOM killer first change the OOM-killer score of launched activities to be the maximum. See discussion at http://linux-mm.org/OOM_Killer --- src/sugar/activity/activityfactory.py | 35 + 1 files changed, 35 insertions(+), 0 deletions(-) diff --git a/src/sugar/activity/activityfactory.py b/src/sugar/activity/activityfactory.py index ee0fd92..5deee6e 100644 --- a/src/sugar/activity/activityfactory.py +++ b/src/sugar/activity/activityfactory.py @@ -65,6 +65,39 @@ def _close_fds(): pass +def __oom_adj_pid(pid, omm_adj_value=None): + Change a process' OOM likelihood to oom_adj_value. + +By default, use the value of gconf path +/desktop/sugar/performance/oom_adj_default; if none exists, make +this process most likely to be killed (oom_adj_value=15). + +Linux-specific. See http://linux-mm.org/OOM_Killer for details. + +oom_adj_fullpath = /proc/%s/oom_adj % pid +if os.path.exists(oom_adj_fullpath): +try: + +# get values/defaults from gconf +import gconf +gconf_dir = /desktop/sugar/performance +gconf_key = oom_adj_default +client = gconf.client_get_default() +if not client.dir_exists(gconf_dir): +client.add_dir(gconf_dir, gconf.CLIENT_PRELOAD_NONE) +if oom_adj_value is None: +oom_adj_value = client.get_int(gconf_dir + / + gconf_key) +if oom_adj_value is None: +oom_adj_value = 15 +client.set_int(gconf_dir + / + gconf_key, + oom_adj_value) + +file(oom_adj_fullpath).write(oom_adj_value) + +except: +pass + + def create_activity_id(): Generate a new, unique ID for this activity pservice = presenceservice.get_instance() @@ -276,6 +309,8 @@ class ActivityCreationHandler(gobject.GObject): stdout=log_file.fileno(), stderr=log_file.fileno()) +__oom_adj_pid(child.pid) + gobject.child_watch_add(child.pid, _child_watch_cb, (environment_dir, log_file)) -- 1.6.2.5 pgptlRP7tORQh.pgp Description: PGP signature ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Fedora 12 build for XO-1.5
I built a F12 image based off our F11 distro in order to help diagnose one of our video problems. Here it is incase it's useful for any other efforts: http://dev.laptop.org/~dsd/f12-xo1.5/ ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: [Sugar-devel] On Sugar 0.84 - status of the Chat/collab leader issue...
Hi, So I was looking over the code with some of the #telepathy guys who are also under the impression that sugar.presence code could be causing many of the collab problems. Main issue is redundancy of code... a lot of what is happening in sugar.presence already happens in telepathy (actually there are even comments in sugar.presence code stating this) but until we know to what level activities are using sugar.presence, we can't really do anything... since activities would break, I guess we'd need to know what in the sugar.presence modules is being really actively used to migrate to MC 5... and give a warning or something, or keep some kind of sym links to the old functions... I dunno, kinda above my level of expertise... regards, David van Assche On Fri, Nov 6, 2009 at 2:02 PM, Tomeu Vizoso to...@sugarlabs.org wrote: On Wed, Nov 4, 2009 at 13:16, Benjamin M. Schwartz bmsch...@fas.harvard.edu wrote: Martin Langhoff wrote: On Tue, Nov 3, 2009 at 9:54 PM, David Van Assche dvanass...@gmail.com wrote: moving to mission control 5 and letting go of the admittedly antiquated sugar presence now ... If you play with a major component replacement - test it for scalability stability over wifi before doing a lot of integration work It's worth noting that moving from the Sugar Presence Service to Mission Control 5 would not alter our network protocols. This is purely a change in how the client software is organized. Neither regression nor improvement in wireless network performance should occur. Was about to say this, the work means making sugar activities' code more similar to GNOME apps, while also removing a daemon. This could have some effect on how the network is used, but chances are it won't. As a first step in removing the PS, I think we should try to implement the python presence API with MC5 instead of PS. Then we can either drop the PS or make it a compatibility shim with MC5 while activities such as eToys make the move. We can also take the chance to develop a better API if there's need for it. But in any case, we need to do some exploration now before we can discuss it in detail. Regards, Tomeu -- «Sugar Labs is anyone who participates in improving and using Sugar. What Sugar Labs does is determined by the participants.» - David Farning ___ Sugar-devel mailing list sugar-de...@lists.sugarlabs.org http://lists.sugarlabs.org/listinfo/sugar-devel -- Marie von Ebner-Eschenbachhttp://www.brainyquote.com/quotes/authors/m/marie_von_ebnereschenbac.html - Even a stopped clock is right twice a day. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
OS38 don't boot
Hi all, I've upgraded the XO 1.5 using the os38.zd. I'm on q3a15. It seems to work (no error message) but unfortunately at the end of the process Sugar don't boot : hang on the first dot. Don't work better after removing the battery. Any idea ? Lionel. P.S.:Capture of the problem here: http://olpc-france.org/wiki/images/thumb/4/41/IMG_0186.JPG/450px-IMG_0186.JPG ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: OS38 don't boot
lionel -- please try booting again, this time hold the check key down while booting. (that's the rightmost key in the group of 4 to the right of the screen: square, circle, X, and check.) that should give more information about what's failing. paul c2s wrote: Hi all, I've upgraded the XO 1.5 using the os38.zd. I'm on q3a15. It seems to work (no error message) but unfortunately at the end of the process Sugar don't boot : hang on the first dot. Don't work better after removing the battery. Any idea ? Lionel. P.S.:Capture of the problem here: http://olpc-france.org/wiki/images/thumb/4/41/IMG_0186.JPG/450px-IMG_0186.JPG part 2 text/plain 129 ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel =- paul fox, p...@laptop.org ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
RE: OS38 don't boot
I've tried and... it works now. It was the shallow copy that take a long time and let me think that the laptop was hang. So I stupidly powered off that laptop without waiting :-( Sorry to don't have enough patience. Lionel. -Message d'origine- De : Paul Fox [mailto:p...@laptop.org] Envoyé : samedi 7 novembre 2009 22:47 À : LASKE, Lionel (C2S) Cc : OLPC Devel Objet : Re: OS38 don't boot lionel -- please try booting again, this time hold the check key down while booting. (that's the rightmost key in the group of 4 to the right of the screen: square, circle, X, and check.) that should give more information about what's failing. paul c2s wrote: Hi all, I've upgraded the XO 1.5 using the os38.zd. I'm on q3a15. It seems to work (no error message) but unfortunately at the end of the process Sugar don't boot : hang on the first dot. Don't work better after removing the battery. Any idea ? Lionel. P.S.:Capture of the problem here: http://olpc-france.org/wiki/images/thumb/4/41/IMG_0186.JPG/450px-IMG_0186.JPG part 2 text/plain 129 ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel =- paul fox, p...@laptop.org ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: [Sugar-devel] MANIFEST experiments
The patch is good to reduce the boot time, but doesn't work for activity developers. After applying the patch I run setup.py dist_xo of an activity and got the following error (since read_manifest is supposed to set self.manifest and doesn't do it anymore): Traceback (most recent call last): File ./setup.py, line 3, in module bundlebuilder.start() File /usr/lib/python2.5/site-packages/sugar/activity/bundlebuilder.py, line 493, in start globals()['cmd_' + args[0]](config, args[1:]) File /usr/lib/python2.5/site-packages/sugar/activity/bundlebuilder.py, line 284, in cmd_dist_xo packager.package() File /usr/lib/python2.5/site-packages/sugar/activity/bundlebuilder.py, line 184, in package missing_files = self.builder.check_manifest() File /usr/lib/python2.5/site-packages/sugar/activity/bundlebuilder.py, line 147, in check_manifest if path not in self.config.bundle.manifest: TypeError: argument of type 'NoneType' is not iterable Regards, Philipp James Cameron wrote: Confirmed. On Wed, Oct 14, 2009 at 05:29:09PM +0545, Daniel Drake wrote: So, I reflashed 2 XOs, booted for the first time, entered a name. On one, I modified sugar.bundle.ActivityBundle.read_manifest() to be a no-op, then turned it off. On the other, I just turned it off. I reproduced this experiment. Used build 802, with a limited set of 22 activities [1], with a similar change [2]. Then I powered both on at the same time and started a stopwatch. I measured how long it takes for the XOs to reach the stage of boot where the XO stick figure and the activity icons are visible. 1255565448 power up both XOs 1255565533 modified XO boot complete 1255565539 unmodified XO boot complete The one with the modification reached this point *55* seconds faster than the other one! In my case, about 6 seconds. I feel that even this small time was worth it, so I plan to patch this for the friends' kids I've got laptops deployed to. Is there a collection of 802 performance improvement patches? Notes: 1. the activities installed were from G1G1 Activities for 8.2 and were Browse Calculate Chat Distance Etoys Implode Maze Measure Memorize Moon Paint Pippy Read Record Ruler Scratch Speak TamTamMini TamTamSynthLab Terminal TurtleArt Write 2. the change was to activitybundle.py in /usr/lib/python2.5/site-packages/sugar/bundle/ and removed all code in read_manifest(), leaving just pass: def read_manifest(self): pass ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
