2014-04-28T00:42:49  *** sebhub <sebhub!~sh@host-82-135-62-35.customer.m-online.net> has joined #rtems
2014-04-28T00:55:50  <sebhub> good morning
2014-04-28T01:13:55  <kiwichris> sebhub, hi.
2014-04-28T01:14:04  <kiwichris> I do not see the extra allocations for resources.
2014-04-28T01:16:46  <kiwichris> I did a complete audit of the semaphores allocated on the beagleboard xm bsp and it was correct. I also checked against the sis which was working and it was incorrectly using an unused termios semaphore for the file system.
2014-04-28T01:17:34  <sebhub> in case networking is enabled, then you reserve now one semaphore?
2014-04-28T01:18:29  <kiwichris> and the network initialise call is not made ?
2014-04-28T01:19:21  <sebhub> yes, then it is left over (not really a big problem)
2014-04-28T01:19:38  <sebhub> but, the tests should exploit these new defines
2014-04-28T01:19:50  <kiwichris> I agree with you and your point; I just do not see a simple easy for the users solution
2014-04-28T01:20:32  <kiwichris> We add more stuff to get the count 100% then a user has to --enable-networking and then something else to actually use and it becomes too complex
2014-04-28T01:20:37  <sebhub> this workspace approach was not my invention ;-)
2014-04-28T01:20:51  <kiwichris> haha
2014-04-28T01:21:13  <kiwichris> not mine either and not Joel's, Mark's or Ron.
2014-04-28T01:21:33  <sebhub> before this network define the resource estimate was 100% correct
2014-04-28T01:21:46  <sebhub> now you overestimate
2014-04-28T01:22:16  <kiwichris> No it was not. Termios was wrong.
2014-04-28T01:22:35  <kiwichris> It happened an unaccounted use fixed it
2014-04-28T01:23:03  <kiwichris> If you enable termios tasking or something like that all 4 termios semaphores are used and things break
2014-04-28T01:23:24  <sebhub> ok, the termios tasking is broken in many ways
2014-04-28T01:23:46  <sebhub> ok, who consumes these termios semaphores?
2014-04-28T01:23:48  <kiwichris> In the case of say the sis it was the termios semaphore was used by the networking or file system tests
2014-04-28T01:24:04  <kiwichris> if a test used network and file systems, eg nfs it would have failed
2014-04-28T01:24:43  <kiwichris> I have for the beagleboard xm hardware testing ....
2014-04-28T01:24:44  <kiwichris> Passed:   489
2014-04-28T01:24:44  <kiwichris> Failed:     1
2014-04-28T01:24:44  <kiwichris> Timeouts:   8
2014-04-28T01:24:44  <kiwichris> Invalid:    0
2014-04-28T01:24:45  <sebhub> ok, so now we have in addition to the termios semphores one network semaphore, so nothing is worse than before
2014-04-28T01:25:14  <kiwichris> Yeah but from a user point of view it makes sense. If termios is fixed things get better.
2014-04-28T01:25:21  <sebhub> we should nethertheless fix the test configurations
2014-04-28T01:25:41  <kiwichris> By stating the number of mounts ?
2014-04-28T01:26:01  <sebhub> no, by reducing the CONFIGURE_MAXIMUM_SEMAPHORES etc.
2014-04-28T01:26:32  <kiwichris> In the case of the file system it is correct cause the sparse file system uses one and that is not in confdefs.h
2014-04-28T01:27:23  <kiwichris> so to me it the counts make sense excluding the termios buggy count to start with and networking being enabled.
2014-04-28T01:27:38  <sebhub> ok, i have to look at the tests, i only wondered that the confdefs.h changes resulted in no changes of the test configurations
2014-04-28T01:28:59  <kiwichris> Ah yes, I fixed the underlying problem in condefs.h and for example in the file systems test where sparse fs was used I though it best to remove the max setting 1 because it mapped correctly
2014-04-28T01:29:16  <kiwichris> best not to remove ... that is
2014-04-28T01:30:03  <sebhub> so all existing tests luckily consumed spares termios semphores?
2014-04-28T01:30:32  <kiwichris> yes so worked by accident and not by design
2014-04-28T01:31:02  <kiwichris> I ran the same test in debuggers for the sis and bbxm to isolate the problem
2014-04-28T01:32:08  <sebhub> ok, thanks for fixing this
2014-04-28T01:32:40  <kiwichris> This bbmx has been a really good exercise in shaking this down
2014-04-28T01:32:49  <sebhub> the resouce configuration is really one of the most anoying things for users
2014-04-28T01:34:18  <kiwichris> I agree
2014-04-28T01:36:43  <kiwichris> on the sp2038 fix, yes time_t is real bug and it needs to be fixed however it is too big an issue for 4.11
2014-04-28T01:36:45  <sebhub> yes, most network based tests used the spare termios semaphores ;-)
2014-04-28T01:36:59  <kiwichris> Yeah I found this out by the fails.
2014-04-28T01:37:25  <kiwichris> This also highlights how loose we have been with this or termios tasking mode is not used.
2014-04-28T01:37:29  <sebhub> did you use a termios task based driver?
2014-04-28T01:37:41  <kiwichris> Ben turned it on in beagleboard
2014-04-28T01:37:52  <sebhub> i think this mode is largely untested
2014-04-28T01:38:07  <kiwichris> The output is stable from the board with the split _Terminate call
2014-04-28T01:38:31  <sebhub> a break point to bsp_fatal_extension() should do it also
2014-04-28T01:38:33  <kiwichris> We are currently running almost 500 tests over jtag and seeing good results.
2014-04-28T01:39:00  <sebhub> or rtems_test_fatal_extension()
2014-04-28T01:39:21  <kiwichris> Yeah. The split should cost nothing and it means we do let the code run to the end.
2014-04-28T01:39:37  <kiwichris> Please ignore the weak debate in relation to this
2014-04-28T01:40:08  <kiwichris> It is about running all the code we can in the test run.
2014-04-28T01:41:11  <sebhub> i am not opposed to weak functions, but in this case i think is not the right solution
2014-04-28T01:42:03  <sebhub> you can also make _CPU_Fatal_halt a real function on all architectures, if you really need to set a break point
2014-04-28T01:43:06  <kiwichris> I do not feel that strongly about it. The only case I see is being able to catch the end point without a rebuild the bsp or kernel. Those projects with verified bases of code save here.
2014-04-28T01:43:14  <kiwichris> I mean about weaks.
2014-04-28T01:44:01  <kiwichris> The thought about making it a real function but that changes something that has not been a function. The split localised the change and made it basically a symbolic change of adding an extra symbol.
2014-04-28T01:52:30  <sebhub> so we have two issues here, 1. you need something to set a break point on, 2. you want to test the code in _Terminate() after _User_extensions_Fatal( the_source, is_internal, the_error );
2014-04-28T01:54:17  <kiwichris> Yes up to the CPU halt and the follow forever loop
2014-04-28T01:54:34  <sebhub> if you use a weak function, then I think that the weak attribute should not be in the header file declaring the function, but instead only in definition of the default implementation
2014-04-28T01:54:52  <kiwichris> by the way I remove the posix thread model patch from the rsb and the tls tests passed
2014-04-28T01:55:21  <kiwichris> Yes good point.
2014-04-28T01:55:36  <kiwichris> about the weak; I just through that in and tested the water :)
2014-04-28T01:55:45  <kiwichris> threw that is
2014-04-28T01:56:48  <kiwichris> Another solution is to have every BSP define bsp_reset and always have that and by default it calls _CPU_Fatal_halt
2014-04-28T01:58:46  <sebhub> yes, i fixed the unlimited posix keys for the tls tests
2014-04-28T02:02:19  <sebhub> ok, what about renaming _CPU_Fatal_halt() to _CPU_Fatal_halt _default() and then map _CPU_Fatal_halt to _BSP_Fatal_halt for all architectures, the default implementation can use_CPU_Fatal_halt _default()
2014-04-28T02:02:56  <sebhub> its more work, yes, but i think this is less confusing than a weak function here and there
2014-04-28T02:04:06  <sebhub> this is just a rename bsp_reset() to _BSP_Fatal_halt() in most cases
2014-04-28T02:07:28  <kiwichris> Do you mean rename in the score/cpu ?
2014-04-28T02:08:10  <kiwichris> This is fine by me. I think anything that creates better rules for all bsps is better overall
2014-04-28T02:12:27  <sebhub> we can also omit the rename and simply add "void _CPU_Fatal_halt( uint32_t _error ) RTEMS_COMPILER_NO_RETURN_ATTRIBUTE;" to all cpu.h
2014-04-28T02:13:08  <sebhub> then implement _CPU_Fatal_halt in the bsps using  _CPU_Fatal_halt _default() or something more appropriate
2014-04-28T02:21:56  <kiwichris> I like _CPU_* being in score/cpu and _BSP_* being in the bsp. It is simple.
2014-04-28T02:22:26  <sebhub> then we have to add #define _CPU_Fatal_halt() _BSP_Fatal_halt()
2014-04-28T02:22:45  <kiwichris> Hmm yes
2014-04-28T02:23:18  <kiwichris> I will ponder this a little. Looking at using halt is misleading because it may reset
2014-04-28T02:23:30  <kiwichris> I am not sure what term should be used
2014-04-28T02:24:14  <kiwichris> I need head home; back in a bit
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2014-04-28T03:22:30  <kiwichris> sebhub, what about '_BSP_Fatal_end' ?
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2014-04-28T07:00:06  <kiwichris> sebhub, is the sp2038 patch ok as I posted it ?
2014-04-28T07:16:25  <sebhub> actually I didn't look at the actual code, i only noticed that you duplicate now code already present in newlib
2014-04-28T07:17:02  <kiwichris> It is not the same code. I wrote it from scratch, functionality yes
2014-04-28T07:17:40  <sebhub> are you sure it is correct, including leap seconds etc.?
2014-04-28T07:18:10  <kiwichris> Hmm I did not do leap seconds.
2014-04-28T07:18:40  <kiwichris> Does newlib to leap seconds ?
2014-04-28T07:18:46  <kiwichris> to -> do
2014-04-28T07:19:07  <sebhub> i don't know, all i know is that this date and time stuff is surprisingly difficult
2014-04-28T07:19:45  <kiwichris> I can look at leap seconds. I tested every day from 1988 to 2100
2014-04-28T07:25:47  <kiwichris> I will rename _CPU_Fatal_halt to _CPU_Fatal_halt_default, add a decl to each cpu.h for _CPU_Fatal_halt and then rename the bsp_reset to _CPU_Fatal_halt. ok >
2014-04-28T07:25:50  <kiwichris> ok ?
2014-04-28T07:26:54  <sebhub>  i think 2012 included a leap second, how did you generate the expected time samples from 1988 to 2100?
2014-04-28T07:27:11  <sebhub> in the original code I generated them with my linux machine
2014-04-28T07:27:26  <sebhub> ok, with the cpu halt stuff
2014-04-28T07:28:00  <kiwichris> I did a set then a get
2014-04-28T07:28:24  <kiwichris> Just like the problem and nearly_problem way
2014-04-28T07:29:17  <kiwichris> I tested only days because the code strips the day seconds from the seconds.
2014-04-28T07:29:55  <kiwichris> and day seconds to hour, minute and seconds is easy (without a leap second)
2014-04-28T07:30:23  <kiwichris> I also use only a single look to find a month from the year day
2014-04-28T07:30:45  <kiwichris> look -> loop
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2014-04-28T09:28:39  <beng-nl> lo all
2014-04-28T09:48:19  <gedare> hi beng-nl
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2014-04-28T15:58:36  <beng-nl> :)
2014-04-28T15:58:43  <beng-nl> hi gedare & all again
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2014-04-28T18:32:55  <gedare> please, &&
2014-04-28T18:33:18  <gedare> i don't want to bit-wise anded with everyone
2014-04-28T18:33:45  <beng-nl> hahaha
2014-04-28T18:33:52  <beng-nl> pardon me
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2014-04-30T00:24:05  <sebhub> good morning
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2014-04-30T04:41:48  <peerst> is there a infrastructure in RTEMS alread to collecty entropy for crypto random generators?
2014-04-30T04:42:10  <peerst> or is this still solved on the application layer?
2014-04-30T04:42:37  <peerst> stuffing entropy manually into OpenSSL
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2014-04-30T05:49:05  <peerst> crickets
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2014-04-30T07:48:24  <gedare> good morning
2014-04-30T07:48:55  <gedare> peerst: i don't know of any security apis within RTEMS
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2014-04-30T07:49:09  <gedare> including entropy gathering
2014-04-30T07:49:27  <gedare> it would probably be a welcome addition though
2014-04-30T07:50:02  <gedare> then again, how much "randomness" exists in a control system is debatable
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2014-04-30T08:33:29  <kiwichris> sebhub, how usable is gcc 4.9 ?
2014-04-30T08:33:48  <kiwichris> I am wondering about moving just the nios2 to 4.9.
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2014-04-30T10:17:32  <peerst> gedare: there is plenty of entropy to collect, precise times of interrupts, network packet timing and such
2014-04-30T10:17:48  <peerst> and many cpu’s have a entropy surce built in nowadays
2014-04-30T10:18:17  <gedare> yeah
2014-04-30T10:18:25  <peerst> combine that with stored entropy from the past
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2014-04-30T10:18:48  <peerst> and mix it up with yarrow or (newer) fortuna
2014-04-30T10:19:55  <peerst> and voila you have /dev/urandom
2014-04-30T10:20:30  <peerst> especially whith fortuna the user can mix in what she thinks is entropy without messing it up
2014-04-30T10:21:07  <peerst> with yarrow one needed to specify hard to determine entropiness of the sources
2014-04-30T10:21:19  <peerst> fortuna is config free
2014-04-30T10:21:27  <gedare> ah i see
2014-04-30T10:21:42  <gedare> i have not looked at this in a long time.
2014-04-30T10:21:54  <peerst> http://en.wikipedia.org/wiki/Fortuna_(PRNG)
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