Commit Graph

494 Commits

Author SHA1 Message Date
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
Yoshihiro Takahashi
265d793d52 MFi386: revision 1.597. 2004-08-05 13:01:29 +00:00
Yoshihiro Takahashi
be1e68e14d MFi386: revision 1.596. 2004-07-19 11:17:57 +00:00
David Xu
53dbf30349 Add ptrace_clear_single_step(), alpha already has it for years, the function
will be used by ptrace to clear a thread's single step state.
2004-07-13 07:22:56 +00:00
Marcel Moolenaar
153af0fa47 MFi386: Update for the KDB framework:
o  Implement makectx().
o  Call kdb_enter() instead of Debugger().
o  Remove implementation of Debugger().
2004-07-10 23:04:42 +00:00
Yoshihiro Takahashi
a9711ba5d1 MFi386: revision 1.592. 2004-06-22 12:11:20 +00:00
Poul-Henning Kamp
89c9c53da0 Do the dreaded s/dev_t/struct cdev */
Bump __FreeBSD_version accordingly.
2004-06-16 09:47:26 +00:00
Poul-Henning Kamp
1930e303cf Deorbit COMPAT_SUNOS.
We inherited this from the sparc32 port of BSD4.4-Lite1.  We have neither
a sparc32 port nor a SunOS4.x compatibility desire these days.
2004-06-11 11:16:26 +00:00
John Baldwin
092a5c4530 Remove atdevbase and replace it's remaining uses with direct references to
KERNBASE instead.
2004-06-10 20:31:00 +00:00
Yoshihiro Takahashi
94d77589ca MFi386: revision 1.586. 2004-03-28 12:03:39 +00:00
Yoshihiro Takahashi
6c021e3150 MFi386: revision 1.583. 2004-01-11 09:18:33 +00:00
David Xu
a30ec4b99c Make sigaltstack as per-threaded, because per-process sigaltstack state
is useless for threaded programs, multiple threads can not share same
stack.
The alternative signal stack is private for thread, no lock is needed,
the orignal P_ALTSTACK is now moved into td_pflags and renamed to
TDP_ALTSTACK.
For single thread or Linux clone() based threaded program, there is no
semantic changed, because those programs only have one kernel thread
in every process.

Reviewed by: deischen, dfr
2004-01-03 02:02:26 +00:00
Yoshihiro Takahashi
b860ed6360 opt_apic.h is not needed. 2003-11-15 12:37:15 +00:00
Marcel Moolenaar
fcaa2925a9 Change the clear_ret argument of get_mcontext() to be a flags argument.
Since all callers either passed 0 or 1 for clear_ret, define bit 0 in
the flags for use as clear_ret. Reserve bits 1, 2 and 3 for use by MI
code for possible (but unlikely) future use. The remaining bits are for
use by MD code.

This change is triggered by a need on ia64 to have another knob for
get_mcontext().
2003-11-09 20:31:04 +00:00
Yoshihiro Takahashi
0e87805663 Include machine/asmacros.h instead of machine/asm.h.
Submitted by:	bde
2003-11-05 17:01:51 +00:00
Yoshihiro Takahashi
18cf8bfb1c MFi386: revision 1.580 2003-11-04 13:14:14 +00:00
Yoshihiro Takahashi
b84a41b421 MFi386: revision 1.579. 2003-10-31 14:54:33 +00:00
Yoshihiro Takahashi
673520bac8 MFi386: revision 1.578. 2003-10-31 13:47:43 +00:00
Yoshihiro Takahashi
a1f83c968f MFi386: revision 1.577. 2003-10-19 11:35:44 +00:00
Yoshihiro Takahashi
ac134d1d1b MFi386: revision 1.576. 2003-10-11 09:24:58 +00:00
Yoshihiro Takahashi
98120869b4 MFi386: revisions 1.572, 1.573 and 1.574. 2003-10-05 09:05:45 +00:00
Yoshihiro Takahashi
33e38a2cc8 Implement the bus_space_map() function to allocate resources and initialize
a bus_handle, but currently it does only initializing a bus_handle.
2003-09-23 08:22:34 +00:00
Yoshihiro Takahashi
8278014bce MFi386 revisions 1.570 and 1.571. 2003-09-11 14:07:02 +00:00
Peter Wemm
9fb1db7bc8 Cosmetic: fix disorder of opt_kstack_pages.h include. 2003-07-31 01:26:40 +00:00
David Xu
20a2d71332 Rename thread_siginfo to cpu_thread_siginfo.
Suggested by: jhb
2003-07-15 00:11:04 +00:00
Yoshihiro Takahashi
1824eaaff5 MFi386: revision 1.566. 2003-06-28 12:35:46 +00:00
David Xu
b8f480ab94 Add a machine depended function thread_siginfo, SA signal code
will use the function to construct a siginfo structure and use
the result to export to userland.

Reviewed by: julian
2003-06-28 06:34:08 +00:00
John Baldwin
aa7ba84232 Fix a typo that broke the pc98 kernel build.
Reported by:	des@'s tinderbox
Pointy hat to:	jhb
Approved by:	re (blanket/scottl)
2003-05-14 20:21:42 +00:00
John Baldwin
90af4afacb - Merge struct procsig with struct sigacts.
- Move struct sigacts out of the u-area and malloc() it using the
  M_SUBPROC malloc bucket.
- Add a small sigacts_*() API for managing sigacts structures: sigacts_alloc(),
  sigacts_free(), sigacts_copy(), sigacts_share(), and sigacts_shared().
- Remove the p_sigignore, p_sigacts, and p_sigcatch macros.
- Add a mutex to struct sigacts that protects all the members of the struct.
- Add sigacts locking.
- Remove Giant from nosys(), kill(), killpg(), and kern_sigaction() now
  that sigacts is locked.
- Several in-kernel functions such as psignal(), tdsignal(), trapsignal(),
  and thread_stopped() are now MP safe.

Reviewed by:	arch@
Approved by:	re (rwatson)
2003-05-13 20:36:02 +00:00
Daniel Eischen
1328e1c4be Add an argument to get_mcontext() which specified whether the
syscall return values should be cleared.  The system calls
getcontext() and swapcontext() want to return 0 on success
but these contexts can be switched to at a later time so
the return values need to be cleared in the saved register
sets.  Other callers of get_mcontext() would normally want
the context without clearing the return values.

Remove the i386-specific context saving from the KSE code.
get_mcontext() is not i386-specific any more.

Fix a bad pointer in the alpha get_mcontext() code.  The
context was being bcopy()'d from &td->tf_frame, but tf_frame
is itself a pointer, so the thread was being copied instead.
Spotted by jake.

Glanced at by:  jake
Reviewed by:    bde (months ago)
2003-04-25 01:50:30 +00:00
John Baldwin
ee6c1d2ed2 Hold the proc lock for curproc around sigonstack(). 2003-04-18 20:09:04 +00:00
Yoshihiro Takahashi
514301992a MFi386: revision 1.561 2003-04-03 12:39:18 +00:00
Yoshihiro Takahashi
cffa957106 MFi386: revisions 1.556 and 1.557.
Backout revision 1.312.
2003-04-02 10:51:06 +00:00
Jeff Roberson
b8db34d280 - Define a new md function 'casuptr'. This atomically compares and sets
a pointer that is in user space.  It will be used as the basic primitive
   for a kernel supported user space lock implementation.
 - Implement this function in x86's support.s
 - Provide stubs that return -1 in all other architectures.  Implementations
   will follow along shortly.

Reviewed by:	jake
2003-04-01 00:18:55 +00:00
Jeff Roberson
4093529dee - Move p->p_sigmask to td->td_sigmask. Signal masks will be per thread with
a follow on commit to kern_sig.c
 - signotify() now operates on a thread since unmasked pending signals are
   stored in the thread.
 - PS_NEEDSIGCHK moves to TDF_NEEDSIGCHK.
2003-03-31 22:49:17 +00:00
Jeff Roberson
1bf4700bff - Change trapsignal() to accept a thread and not a proc.
- Change all consumers to pass in a thread.

Right now this does not cause any functional changes but it will be important
later when signals can be delivered to specific threads.
2003-03-31 22:02:38 +00:00
Jake Burkholder
227f9a1c58 - Add vm_paddr_t, a physical address type. This is required for systems
where physical addresses larger than virtual addresses, such as i386s
  with PAE.
- Use this to represent physical addresses in the MI vm system and in the
  i386 pmap code.  This also changes the paddr parameter to d_mmap_t.
- Fix printf formats to handle physical addresses >4G in the i386 memory
  detection code, and due to kvtop returning vm_paddr_t instead of u_long.

Note that this is a name change only; vm_paddr_t is still the same as
vm_offset_t on all currently supported platforms.

Sponsored by:	DARPA, Network Associates Laboratories
Discussed with:	re, phk (cdevsw change)
2003-03-25 00:07:06 +00:00
Yoshihiro Takahashi
0f46d10b5c MFi386: revision 1.554. 2003-02-23 13:26:21 +00:00
Jake Burkholder
aff81a81d6 Remove BDE_DEBUGGER.
Discussed with:	bde
2003-01-28 19:05:44 +00:00
Yoshihiro Takahashi
cba862a39c MFi386: revision 1.552. 2003-01-10 13:31:29 +00:00
Yoshihiro Takahashi
df44e708b1 MFi386: revision 1.551.
Approved by:	re (jhb)
2002-12-04 15:04:18 +00:00
Yoshihiro Takahashi
9df5c871ce MFi386: revision 1.550. 2002-11-17 02:57:06 +00:00
Dag-Erling Smørgrav
97b67f3141 Print real / avail memory in megabytes rather than kilobytes. 2002-11-09 16:19:14 +00:00
Thomas Moestl
0fca57b8b8 Move the definitions of the hw.physmem, hw.usermem and hw.availpages
sysctls to MI code; this reduces code duplication and makes all of them
available on sparc64, and the latter two on powerpc.
The semantics by the i386 and pc98 hw.availpages is slightly changed:
previously, holes between ranges of available pages would be included,
while they are excluded now. The new behaviour should be more correct
and brings i386 in line with the other architectures.

Move physmem to vm/vm_init.c, where this variable is used in MI code.
2002-11-07 23:57:17 +00:00
Juli Mallett
751d91aabd Remove what was a temporary bogus assignment of bits of siginfo_t, as it does
not look like the prerequisites to fill it in properly will be in the tree
for the upcoming release, but it's mostly done, so there is no need for these
to stay around to remind us.
2002-11-06 14:53:35 +00:00
Yoshihiro Takahashi
4b8d81b418 MFi386: revisions 1.544 and 1.545. 2002-10-26 15:44:06 +00:00
Yoshihiro Takahashi
53b8edec96 MFi386: revision 1.543. 2002-10-22 15:25:25 +00:00
Jeff Roberson
42f851d958 - kserunnable() is now sched_runnable() change instances of these where
appropriate.
 - include sched.h to see this new api.
2002-10-12 05:37:26 +00:00
Yoshihiro Takahashi
fd936e43a4 Fixed SBUS_RA_*_region_* functions. 2002-10-10 13:38:50 +00:00
Yoshihiro Takahashi
de62287d07 MFi386: revisions 1.539, 1.540 and 1.541. 2002-10-08 12:53:26 +00:00