+
+
+
+
+ ************************************************
+ *** This file is a TODO. It is thus kinda ***
+ *** outdated. You know the story, right? ***
+ ************************************************
+
+
+
+
###
### Ongoing stuff
###
-Document the fact that gras processes display the backtrace on sigusr and sigint
Document host module
/* FIXME: better place? */
int vasprintf (char **ptr, const char *fmt, va_list ap);
char *bprintf(const char*fmt, ...) _XBT_GNUC_PRINTF(1,2);
-Module renamings:
- - rename SWAG to RING?
- - Rename cursor to iterator
-
-gras_socket_close should be blocking until all the data sent have been
-received by the other side (implemented with an ACK mechanism).
-
###
### Planned
###
* Infrastructure
****************
-[autoconf]
+[build chain]
* Check the gcc version on powerpc. We disabled -floop-optimize on powerpc,
but versions above 3.4.0 should be ok.
* check whether we have better than jmp_buf to implement exceptions, and
* XBT
*****
-[doc]
- * graphic showing:
- (errors, logs ; dynars, dicts, hooks, pools; config, rrdb)
-
-[portability layer]
- * maybe a memory pool so that we can cleanly kill an actor
-
[errors/exception]
* Better split casual errors from programming errors.
The first ones should be reported to the user, the second should kill
* Hijack message from a given category to another for a while (to mask
initializations, and more)
* Allow each actor to have its own setting
- * a init/exit mecanism for logging appender
* more logging appenders (take those from Ralf in l2)
[modules]
[other modules]
* we may need a round-robin database module, and a statistical one
- * a hook module *may* help cleaning up some parts. Not sure yet.
* Some of the datacontainer modules seem to overlap. Kill some of them?
- replace fifo with dynars
- replace set with SWAG
-
-*
-* GRAS
-******
-
-[doc]
- * implement the P2P protocols that macedon does. They constitute great
- examples, too
-
-[transport]
- * use poll(2) instead of select(2) when available. (first need to check
- the advantage of doing so ;)
-
- Another idea we spoke about was to simulate this feature with a bunch of
- threads blocked in a read(1) on each incoming socket. The latency is
- reduced by the cost of a syscall, but the more I think about it, the
- less I find the idea adapted to our context.
-
- * timeout the send/recv too (hard to do in RL)
- * Adaptative timeout
- * multiplex on incoming SOAP over HTTP (once datadesc can deal with it)
-
- * The module syntax/API is too complex.
- - Everybody opens a server socket (or almost), and nobody open two of
- them. This should be done automatically without user intervention.
- - I'd like to offer the possibility to speak to someone, not to speak on
- a socket. Users shouldn't care about such technical details.
- - the idea of host_cookie in NWS seem to match my needs, but we still
- need a proper name ;)
- - this would allow to exchange a "socket" between peer :)
- - the creation needs to identify the peer actor within the process
-
- * when a send failed because the socket was closed on the other side,
- try to reopen it seamlessly. Needs exceptions or another way to
- differentiate between the several system_error.
- * cache accepted sockets and close the old ones after a while.
- Depends on the previous item; difficult to achieve with firewalls
-
-[datadesc]
- * Add a XML wire protocol alongside to the binary one (for SOAP/HTTP)
- * cbps:
- - Error handling
- - Regression tests
- * Inter-arch conversions
- - Port to ARM
- - Convert in the same buffer when size increase
- - Exchange (on net) structures in one shoot when possible.
- - Port to really exotic platforms (Cray is not IEEE ;)
- * datadesc_set_cste: give the value by default when receiving.
- - It's not transfered anymore, which is good for functions pointer.
- * Parsing macro
- - Cleanup the code (bison?)
- - Factorize code in union/struct field adding
- - Handle typedefs (gras_datatype_copy can be usefull, but only if
- main type is already defined)
- - Handle unions with annotate
- - Handle enum
- - Handle long long and long double
- - Forbid "char", allow "signed char" and "unsigned char", or user code won't be
- portable to ARM, at least.
- - Handle struct/union/enum embeeded within another container
- (needs modifications in DataDesc, too)
-
- - Check short a, b;
- - Check short ***
- - Check struct { struct { int a } b; }
-
- * gras_datadesc_import_nws?
-
-[Messaging]
- * Other message types than oneway & RPC are possible:
- - forwarding request, group communication
- * Message priority
- * Message forwarding
- * Group communication
- * Message declarations in a tree manner (such as log channels)?
-
-[GRASPE] (platform expender)
- * Tool to visualize/deploy and manage in RL
- * pull method of source diffusion in graspe-slave
-
-[Actors] (parallelism in GRAS)
- * An actor is a user process.
- It has a highly sequential control flow from its birth until its death.
- The timers won't stop the current execution to branch elsewhere, they
- will be delayed until the actor is ready to listen. Likewise, no signal
- delivery. The goal is to KISS for users.
- * You can fork a new actor, even on remote hosts.
- * They are implemented as threads in RL, but this is still a distributed
- memory *model*. If you want to share data with another actor, send it
- using the message interface to explicit who's responsible of this data.
- * data exchange between actors placed within the same UNIX process is
- *implemented* by memcopy, but that's an implementation detail.
-
-[Other, more general issues]
- * watchdog in RL (ie, while (1) { fork; exec the child, wait in father })
- * Allow [homogeneous] dico to be sent
- * Make GRAS thread safe by mutexing what needs to be
-
-*
-* AMOK
-******
-
-[bandwidth]
- * add a version guessing the appropriate datasizes automatically
-[other modules]
- * log control, management, dynamic token ring
- * a way using SSH to ask a remote host to open a socket back on me
-
-
-*
-* SURF
-******
-
-[maxmin]
- * select portion of the system that changed instead of recomputing
- * the whole system solution at each action change
-
-
