Julian Elischer ed062c8d66 Refactor a bunch of scheduler code to give basically the same behaviour ... but with slightly cleaned up interfaces. The KSE structure has become the same as the "per thread scheduler private data" structure. In order to not make the diffs too great one is #defined as the other at this time. The KSE (or td_sched) structure is now allocated per thread and has no allocation code of its own. Concurrency for a KSEGRP is now kept track of via a simple pair of counters rather than using KSE structures as tokens. Since the KSE structure is different in each scheduler, kern_switch.c is now included at the end of each scheduler. Nothing outside the scheduler knows the contents of the KSE (aka td_sched) structure. The fields in the ksegrp structure that are to do with the scheduler's queueing mechanisms are now moved to the kg_sched structure. (per ksegrp scheduler private data structure). In other words how the scheduler queues and keeps track of threads is no-one's business except the scheduler's. This should allow people to write experimental schedulers with completely different internal structuring. A scheduler call sched_set_concurrency(kg, N) has been added that notifies teh scheduler that no more than N threads from that ksegrp should be allowed to be on concurrently scheduled. This is also used to enforce 'fainess' at this time so that a ksegrp with 10000 threads can not swamp a the run queue and force out a process with 1 thread, since the current code will not set the concurrency above NCPU, and both schedulers will not allow more than that many onto the system run queue at a time. Each scheduler should eventualy develop their own methods to do this now that they are effectively separated. Rejig libthr's kernel interface to follow the same code paths as linkse for scope system threads. This has slightly hurt libthr's performance but I will work to recover as much of it as I can. Thread exit code has been cleaned up greatly. exit and exec code now transitions a process back to 'standard non-threaded mode' before taking the next step. Reviewed by: scottl, peter MFC after: 1 week		2004-09-05 02:09:54 +00:00
..
db_access.c	Mega update for the KDB framework: turn DDB into a KDB backend.	2004-07-10 23:47:20 +00:00
db_access.h
db_break.c	Mega update for the KDB framework: turn DDB into a KDB backend.	2004-07-10 23:47:20 +00:00
db_break.h	Revert previous and move the prototype for db_alt_break to ddb.h.	2002-12-31 18:30:53 +00:00
db_command.c	Oops... Add the CS_OWN flag to the trace and where commands so that	2004-07-21 05:55:51 +00:00
db_command.h
db_examine.c	Use __FBSDID().	2003-06-10 22:09:23 +00:00
db_expr.c	Use __FBSDID().	2003-06-10 22:09:23 +00:00
db_input.c	Use __FBSDID().	2003-06-10 22:09:23 +00:00
db_lex.c	Use __FBSDID().	2003-06-10 22:09:23 +00:00
db_lex.h
db_main.c	Damage control. Correcly advance symtab and strtab pointers, not	2004-07-28 08:59:08 +00:00
db_output.c	Mega update for the KDB framework: turn DDB into a KDB backend.	2004-07-10 23:47:20 +00:00
db_output.h
db_print.c	Mega update for the KDB framework: turn DDB into a KDB backend.	2004-07-10 23:47:20 +00:00
db_ps.c	Refactor a bunch of scheduler code to give basically the same behaviour	2004-09-05 02:09:54 +00:00
db_run.c	Mega update for the KDB framework: turn DDB into a KDB backend.	2004-07-10 23:47:20 +00:00
db_sym.c	Add DDB_NUMSYM option which in addition to the symbolic representation	2004-02-24 22:51:42 +00:00
db_sym.h
db_thread.c	Mega update for the KDB framework: turn DDB into a KDB backend.	2004-07-10 23:47:20 +00:00
db_variables.c	Mega update for the KDB framework: turn DDB into a KDB backend.	2004-07-10 23:47:20 +00:00
db_variables.h	Mega update for the KDB framework: turn DDB into a KDB backend.	2004-07-10 23:47:20 +00:00
db_watch.c	Use __FBSDID().	2003-06-10 22:09:23 +00:00
db_watch.h
db_write_cmd.c	Use __FBSDID().	2003-06-10 22:09:23 +00:00
ddb.h	Unify db_stack_trace_cmd(). All it did was look up the thread given	2004-07-21 05:07:09 +00:00