implemented by means of an additional member in cpu_ent.
* Removed thread::keep_scheduled and the related functions. The feature
wasn't used yet and wouldn't have worked as implemented anyway.
* Resurrected an older, SMP aware version of our simple scheduler and made it
the default instead of the affine scheduler. The latter is in no state to
be used yet. It causes enormous latencies (I've seen up to 0.1s) even when
six or seven CPUs were idle at the same time, totally killing parallelism.
That's also the reason why a -j8 build was slower than a -j2. This is no
longer the case. On my machine the -j2 build takes about 10% less time now
and the -j8 build saves another 20%. The latter is not particularly
impressive (compared with Linux), but that seems to be due to lock
contention.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34615 a95241bf-73f2-0310-859d-f6bbb57e9c96
timer_interrupt() return B_INVOKE_SCHEDULER. The scheduler itself uses a
timer hook and relies on scheduler_reschedule() to be called. Will make this
even more reliable in the next commit.
This might fix#3535.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34614 a95241bf-73f2-0310-859d-f6bbb57e9c96
not at all.
* Tried to improve the readability of the "ints" command output.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34613 a95241bf-73f2-0310-859d-f6bbb57e9c96
unlocked, allowing for more parallel access.
* Writing is still done synchronously, though.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34611 a95241bf-73f2-0310-859d-f6bbb57e9c96
mean crashes with the media_server version I just checked in.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34556 a95241bf-73f2-0310-859d-f6bbb57e9c96
system_time_nsecs(), returning the system time in nanoseconds. The function
is only really implemented for x86. For the other architectures
system_time() * 1000 is returned.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34543 a95241bf-73f2-0310-859d-f6bbb57e9c96
waits for certain events on a given page, NotifyPageEvents() wakes up
waiting threads respectively.
* Used the new feature instead of condition variables for waiting on busy
pages. We save publishing and unpublishing of a condition variable whenever
a page is marked busy. There's only something to do, if there's at least
one thread waiting in the list of the respective cache. The general
assumption is that this is only rarely the case and even if it happens,
there should be only very few threads.
* Added an apparently missing notification in cache_io(). At least I didn't
see the reason for it not being there.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34537 a95241bf-73f2-0310-859d-f6bbb57e9c96
to clarify that they never enlarge the area.
* Reimplemented VMKernelAddressSpace. It is somewhat inspired by Bonwick's
vmem resource allocator (though we have different requirements):
- We consider the complete address space to be divided into contiguous
ranges of type free, reserved, or area, each range being represented by
a VMKernelAddressRange object.
- The range objects are managed in an AVL tree and a doubly linked list
(the latter only for faster iteration) sorted by address. This provides
O(log(n)) lookup, insertion and removal.
- For each power of two size we maintain a list of free ranges of at least
that size. Thus for the most common case of B_ANY*_ADDRESS area
allocation, we find a free range in constant time (the rest of the
processing being O(log(n))) with a rather good fit. This should also
help avoiding address space fragmentation.
While the new implementation should be faster, particularly with an
increasing number of areas, I couldn't measure any difference in the -j2
haiku build. From a cursory test the -j8 build hasn't tangibly benefitted
either.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34528 a95241bf-73f2-0310-859d-f6bbb57e9c96
- Renamed to AVLTreeBase and moved it into its own header/source file.
- Renamed FindClose() to FindClosest().
- Added CheckTree() method for debugging purposes. It checks the validity
of the tree.
* Added a templatized class AVLTree which doesn't offer a map-like interface
like AVLTreeMap, but rather one similar to BOpenHashMap and SplayTree. It
is more convenient to use, if one wants to store objects that already
contain the key.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34526 a95241bf-73f2-0310-859d-f6bbb57e9c96
link to them.
* VM{Kernel,User}AddressSpace manage the respective VMArea subclass now, and
VMAddressSpace has grown factory methods {Create,Delete}Area.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34493 a95241bf-73f2-0310-859d-f6bbb57e9c96
new derived classes VM{Kernel,User}AddressSpace. Currently those are
identical, but that will change.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34492 a95241bf-73f2-0310-859d-f6bbb57e9c96
pure address space feature, so it should be handled there.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34491 a95241bf-73f2-0310-859d-f6bbb57e9c96
and size.
* Made VMArea::Set{Base,Size}() private and made VMAddressSpace a friend.
In vm.cpp the new VMAddressSpace::ResizeArea{Head,Tail}() are used
instead.
Finally all address space changes happen in VMAddressSpace only. *phew*
Now it's ready to be thoroughly butchered. :-)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34467 a95241bf-73f2-0310-859d-f6bbb57e9c96
This makes it more explicit where the fields are modified.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34464 a95241bf-73f2-0310-859d-f6bbb57e9c96
simplify migration of the area management, but as a side effect, it also
makes area deletion O(1) (instead of O(n), n == number of areas in the
address space).
* Moved more area management functionality from vm.cpp to VMAddressSpace and
VMArea structure creation to VMArea. Made the list and list link members
itself private.
* VMAddressSpace tracks its amount of free space, now. This also replaces
the previous mechanism to do that only for the kernel address space. It
was broken anyway, since delete_area() subtracted the area size instead of
adding it.
* vm_free_unused_boot_loader_range():
- lastEnd could be set to a value < start, which could cause memory
outside of the given range to be unmapped. Haven't checked whether this
could happen in practice -- if so, it would be seriously unhealthy.
- The range between the end of the last area in the range and the end of
the range would never be freed.
- Fixed potential integer overflows when computing addresses.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34459 a95241bf-73f2-0310-859d-f6bbb57e9c96
of the condition variable and synchronization subsystem of the freebsd compat
layer which will be committed next.
* Also there was a discussion about adding these functions on the commit
mailing list. The mail in http://www.freelists.org/post/haiku-commits/r34395-in-haikutrunksrclibscompatfreebsd-network-compatsys,3
is a good sum up of it (need to scroll somewhat down, though).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34458 a95241bf-73f2-0310-859d-f6bbb57e9c96
* "Classified" VMAddressSpace, i.e. turned the vm_address_space_*() functions
into methods, made all attributes (but "areas") private, and added
accessors.
* Also turned the vm.cpp functions vm_area_lookup() and
remove_area_from_address_space() into VMAddressSpace methods. The rest of
the area management functionality will follow soon.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34447 a95241bf-73f2-0310-859d-f6bbb57e9c96
CreateAsmStructOffsetsHeader mechanism to generate a header with macros
defined to the sizes of the structures we're interested in and when compiling
in C mode define the structures as "struct { char bytes[size]; }".
It works in principle, but due to how jam works, one would have to specify the
dependency to the generated header for all sources that include it directly or
indirectly.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34441 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Use C++ DoublyLinkedList class instead of the struct list.
* Note, this code is untested yet, but I will test it now (Qemu doesn't work
on Haiku anymore for some reason) :-)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34382 a95241bf-73f2-0310-859d-f6bbb57e9c96
use for the asm_offsets.cpp file, so it can be reused elsewhere.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34311 a95241bf-73f2-0310-859d-f6bbb57e9c96
resource manager.
* Could be drastically improved, though, by taking the fragmentation into
account.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34309 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Implemented renameat(), faccessat(), fchownat(), fchmodat(), and mkfifoat().
* Added stub for mknodat().
* The kernel backend for faccessat() does not yet differentiate between
effective and real user/group IDs, though.
* Removed B_ENABLE_INCOMPLETE_POSIX_AT_SUPPORT, as we now support everything
(more or less). This also closes ticket #4928.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34288 a95241bf-73f2-0310-859d-f6bbb57e9c96
returns the correct error code if the buffer was too small (should be ERANGE
instead of ENOBUF).
* Also, it is now independent of B_PATH_NAME_LENGTH, and therefore should
fulfill POSIX getcwd() requirements. This should also close ticket #3352.
* Is there any reason to allocate another buffer instead of using memmove()
at the end instead of memcpy()?
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34276 a95241bf-73f2-0310-859d-f6bbb57e9c96
would always inherit them all, causing quite a number of open files.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34247 a95241bf-73f2-0310-859d-f6bbb57e9c96
checking the physical frame buffer location.
* This allows us to map the whole frame buffer at once, which means there is no
need anymore to remap the memory on mode change.
* Also, this will ease the burden of the MTRRs, as the memory size will be
properly aligned.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34206 a95241bf-73f2-0310-859d-f6bbb57e9c96
all MTRRs at once.
* Added a respective x86_set_mtrrs() kernel function.
* x86 CPU module:
- Implemented the new hook.
- Prefixed most debug output with the CPU index. Otherwise it gets quite
confusing with multiple CPUs.
- generic_init_mtrrs(): No longer clear all MTRRs, if they are already
enabled. This lets us benefit from the BIOS's setup until we install our
own -- otherwise with caching disabled things are *really* slow.
* arch_vm.cpp: Completely rewrote the MTRR handling as the old one was not
only slow (O(2^n)), but also broken (resulting in incorrect setups (e.g.
with cachable ranges larger than requested)), and not working by design for
certain cases (subtractive setups intersecting ranges added later).
Now we maintain an array with the successfully set ranges. When a new range
is added, we recompute the complete MTRR setup as we need to. The new
algorithm analyzing the ranges has linear complexity and also handles range
base addresses with an alignment not matching the range size (e.g. a range
at address 0x1000 with size 0x2000) and joining of adjacent/overlapping
ranges of the same type.
This fixes the slow graphics on my 4 GB machine (though unfortunately the
8 MTRRs aren't enough to fully cover the complete frame buffer (about 35
pixel lines remain uncachable), but that can't be helped without rounding up
the frame buffer size, for which we don't have enough information). It might
also fix#1823.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34197 a95241bf-73f2-0310-859d-f6bbb57e9c96
This is something must must not do in an idle thread or we get the scheduler
into trouble.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34196 a95241bf-73f2-0310-859d-f6bbb57e9c96
to be cloned.
* Added "flags" parameter to the SetTo(const void*,...) version.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34155 a95241bf-73f2-0310-859d-f6bbb57e9c96
to physical memory whose address would accidentally satisfy the
IS_USER_ADDRESS() check.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34136 a95241bf-73f2-0310-859d-f6bbb57e9c96
parameter and request->IsWrite(). The parameter means whether we want to
write to the request's I/O buffer (therefore renamed it to writeToRequest),
while request->IsWrite() indicates whether the request is a write request.
One can only write to a read request's buffer and vice versa.
IOBuffer::LockMemory() also wants to know whether the request is a write
request, not whether we want to write to the memory.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34135 a95241bf-73f2-0310-859d-f6bbb57e9c96
stack after that has just been changed, and does not contain the data one
would assume.
* This fixes the leaking the vm_translation_map_arch_info objects, and thus
bug #4957.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34090 a95241bf-73f2-0310-859d-f6bbb57e9c96
aren't monotonically increasing which this code was assuming. This fixes bug
#4917.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34074 a95241bf-73f2-0310-859d-f6bbb57e9c96
* /etc now points to /boot/common/etc/, and the remaining contents of the former
"etc" are put there now, as well.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33986 a95241bf-73f2-0310-859d-f6bbb57e9c96
as the BeOS scheduler. This makes MediaPlayer playback much better, as high
priority threads could lose their quantum to a worker thread twice in a row
with 4% probability before.
* I did not yet change the simple scheduler as well yet; maybe this isn't the
final one either.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33965 a95241bf-73f2-0310-859d-f6bbb57e9c96
Mikhail Panasyuk: since worker threads often end up with B_NORMAL_PRIORITY,
it might be a good idea to give system threads a higher priority.
* Minor cleanup (mostly automatic whitespace).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33961 a95241bf-73f2-0310-859d-f6bbb57e9c96
* When DEBUG_SPINLOCK_LATENCIES is 1, the system will panic if any spinlock is
held longer than DEBUG_LATENCY micro seconds (currently 200). If your system
doesn't boot anymore, a new safemode setting can disable the panic.
* Besides some problems during boot when the MTRRs are set up, 200 usecs work
fine here if all debug output is turned off (the output stuff is definitely
problematic, though I don't have a good idea on how to improve upon it a lot).
* Renamed the formerly BeOS compatible safemode settings to look better; there
is no need to be compatible there.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33953 a95241bf-73f2-0310-859d-f6bbb57e9c96
accesses the scheduler data inside the thread structure, freeing it first lead
to a crash when a thread couldn't be created.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33940 a95241bf-73f2-0310-859d-f6bbb57e9c96
and it's still a valid call.
* This fixes ktrace_printf() from userland.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33934 a95241bf-73f2-0310-859d-f6bbb57e9c96
file systems, so those checks don't have to be duplicated there, anymore.
* Minor cleanup, mostly automatic whitespace.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33895 a95241bf-73f2-0310-859d-f6bbb57e9c96
debug_output().
* Added a second buffer to be used when interrupts are turned off, otherwise
dprintf_args() will now use a mutex guarded buffer to fill with vfprintf() -
the actual sending to the outputs still needs the spinlock, so things only
slightly improved.
* Moved private functions into the private section of the source file.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33809 a95241bf-73f2-0310-859d-f6bbb57e9c96
should improve the kernel latencies, as things like
vm_page_allocate_page_run() is very expensive.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33807 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Now, killing a team shut properly cause the app_server to close the windows
of that team, too.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33777 a95241bf-73f2-0310-859d-f6bbb57e9c96
ID.
* Accidently, this should also fix bug #4839.
* Optimized _get_next_sem_info() a whole lot by iterating over the team's
semaphore list.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33773 a95241bf-73f2-0310-859d-f6bbb57e9c96
to the owning team.
* Instead, the team now maintains a list containing the ports it owns.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33771 a95241bf-73f2-0310-859d-f6bbb57e9c96
* This makes sem_delete_owned_sems() a lot more efficient; before it would need
to scan the entire semaphore table.
* This speeds up the test build of the kernel by another 2 seconds (with
KDEBUG=2) on my laptop.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33743 a95241bf-73f2-0310-859d-f6bbb57e9c96
iterated over all known thread *IDs* with interrupts disabled.
Now it iterates over the team's thread list (going from back to front, since
new threads are added at the front of the singly linked queue).
* Alexandre restarted Tracker quite a lot, and let the shell script run to
reproduce a certain bug - and then wondered why ProcessController would
take several seconds to open its windows until it passed through more than
8 million IDs... :-)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33737 a95241bf-73f2-0310-859d-f6bbb57e9c96
(hopefully) correct place.
* It seems to be even harder to understand basic locking primitives: when you
think about it, it shouldn't surprise you that conditional variables never
return B_WOULD_BLOCK. This fixes gdb again.
* Added tracing support to the ports subsystem.
* get_port_message() will now resize the port heap if needed (but will also
take timeouts into account while doing so, more or less). The initial port
space is 4MB (as before), the growth rate is the same, and the system wide
limit is arbitrarily set to 64 MB (all swappable). A team limit has been set
to 8 MB, but is not enforced yet. Since ports are using up address space in
the kernel, those seems to be proper limits.
* This also fixes a strange, and rare lockup where the mouse cursor would still
move, but everything else would basically hang, but look perfectly normal from
KDL on the first look. As recently happened on Brecht's laptop, and debugged
by mmlr and me: the cbuf space got used up when lots of windows wanted to
redraw after a workspace switch. The app_server wouldn't answer anymore to
client requests, but thought it would have done so, as LinkSender::Flush()
doesn't care if it got a B_NO_MEMORY (the ports will now block until memory
is available if possible, so that should not be a problem anymore).
* Improved "port" KDL command, it now also prints the messages in the port.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33735 a95241bf-73f2-0310-859d-f6bbb57e9c96
was used this way in the debugger. Doing this later should be harmless,
AFAICT, but Ingo will probably know better.
* Beware, though, the debugger currently does not work anymore.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33730 a95241bf-73f2-0310-859d-f6bbb57e9c96
* its own heap allocator instead of cbuf - this makes cbuf superfluous, and I
therefore removed it from the kernel. The heap is swappable, so lifts the
kernel's resource usage a bit. In the future, the heap should grow as well;
right now it should be at least as good as before.
* it no longer uses spinlocks, but just mutexes now for better scalability - it
was not usable with interrupts turned off anyway (due to its semaphore usage).
* it no longer uses semaphores, but condition variables.
* Needed to move the port initialization to a later point, as swappable memory
wasn't usable that early.
* All ports test are still passing, hopefully I didn't mess anything up :-)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33728 a95241bf-73f2-0310-859d-f6bbb57e9c96
