protected by the global vnodes lock. The contention mostly moves to other
locks, though. The total -j8 Haiku image build time is only reduced
minimally.
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contention about two orders of magnitude. Most of it seems to be taken over
by other locks, though. Yields only small improvements for the -j8 Haiku
image build.
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table. It is now inline and uses double-checked locking. This reduces the
contention on the lock to insignificant. Total -j8 Haiku image build speedup
is marginal, but the total kernel time drops 12%.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34934 a95241bf-73f2-0310-859d-f6bbb57e9c96
access to a vm_page. It is basically an atomically accessed thread ID field
in the vm_page structure, which is explicitly set by macros marking the
critical sections. As a first positive effect I had to review quite a bit of
code and found several issues.
* Added several TODOs and comments. Some harmless ones, but also a few
troublesome ones in vm.cpp regarding page unmapping.
* file_cache: PrecacheIO::Prepare()/read_into_cache: Removed superfluous
vm_page_allocate_page() return value checks. It cannot fail anymore.
* Removed the heavily contended "pages" lock. We use different policies now:
- sModifiedTemporaryPages is accessed atomically.
- sPageDeficitLock and sFreePageCondition are protected by a new mutex.
- The page queues have individual locks (mutexes).
- Renamed set_page_state_nolock() to set_page_state(). Unless the caller says
otherwise, it does now lock the affected pages queues itself. Also changed
the return value to void -- we panic() anyway.
* set_page_state(): Add free/clear pages to the beginning of their respective
queues as this is more cache-friendly.
* Pages with the states PAGE_STATE_WIRED or PAGE_STATE_UNUSED are no longer
in any queue. They were in the "active" queue, but there's no good reason
to have them there. In case we decide to let the page daemon work the queues
(like FreeBSD) they would just be in the way.
* Pulled the common part of vm_page_allocate_page_run[_no_base]() into a helper
function. Also fixed a bug I introduced previously: The functions must not
vm_page_unreserve_pages() on success, since they remove the pages from the
free/clear queue without decrementing sUnreservedFreePages.
* vm_page_set_state(): Changed return type to void. The function cannot really
fail and no-one was checking it anyway.
* vm_page_free(), vm_page_set_state(): Added assertion: The page must not be
free/clear before. This is implied by the policy that no-one is allowed to
access free/clear pages without holding the respective queue's lock, which is
not the case at this point. This found the bug fixed in r34912.
* vm_page_requeue(): Added general assertions. panic() when requeuing of
free/clear pages is requested. Same reason as above.
* vm_clone_area(), B_FULL_LOCK case: Don't map busy pages. The implementation is
still not correct, though.
My usual -j8 Haiku build test runs another 10% faster, now. The total kernel
time drops about 18%. As hoped the new locks have only a fraction of the old
"pages" lock contention. Other locks lead the "most wanted list" now.
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canceled status, so we need to collect the corresponding sem release. Otherwise
we would run directly into the old cancel status the next time we schedule.
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performance tests, but I wrote this code before David got around to improve
his color space assembler code and didn't want to throw it away. Turned
off for the time being, since David's version works fine.
* Supply a codec sub_id in the media_codec_info. This allows matching
decoders to encoders, which comes in handy for Smart Rendering in Clockwerk.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34931 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Use the configured source color space when converting instead of hardcoding
B_RGB32. (Resolved TODO)
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* Small coding style cleanups in the .cpp
* When reading raw chunks, keep fCurrentFrame updated anyway
* When decoding frames and chunks, don't change the meaning of fCurrentTime,
it's supposed to be the start time of the next chunk/frame, same as
CurrentFrame(), not the time of the frame/chunk we just decoded/read.
BMediaTrack::CurrentFrame() is actually documented like this in the BeBook,
but CurrentTime() is not. However, when seeking to a specific time, it is
understood that this is the time of the next frame/chunk. If we decode/read
it and set fCurrentTime to the start_time as specified in the media_header,
it would actually not change for the first frame/chunk after seeking.
To be able to know the duration of chunks, fWriterFormat had to be changed
to just fFormat and is now used for decoding as well.
* Simplified handling of media_header in some methods, saves one assignment.
These changes are not so well tested, yet.
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* Fixed coding style issues pointed out by Axel.
* Fixed potential buffer overflow and fault in default-client-up code path
(OF counts terminating zero char, too).
* Added an intermediate fallback to parsing the boot path
* Added himself to the copyright holders
Thanks a lot! Fixes ticket #5189.
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a timeout leaks these transfers. In the end this would at least lead to a flood
of canceled transfers on device unplug or, worse yet, exhaust the USB memory
pool stalling all further transfers as seen in #4604. Probably fixes both
issues, can't test though as I don't have the hardware.
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mapping is actually present. This would have resulted in page 0 being freed
over and over again, if we hadn't also incorrectly tried to look up the page
by the virtual instead of the physical address. So we were actually freeing
random pages. Fortunately the virtual addresses are kernel addresses, so that
the affected pages lay beyond 2 GB and probably weren't used at this point
yet.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34912 a95241bf-73f2-0310-859d-f6bbb57e9c96
spacing and insets).
* Added a check box for disalbling the index generation on BFS volumes.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34908 a95241bf-73f2-0310-859d-f6bbb57e9c96
the internal dependencies into account. This should fix bugs #5166, #5120,
and #5150.
* Also, the time source object manager, as well as the dormant node manager
are now recreated on media roster restart (when the media server is
restarted).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34906 a95241bf-73f2-0310-859d-f6bbb57e9c96
(in libgnu.so) with my current rsync port:
* Node now opens its fd with O_RDONLY, as otherwise BFS will refuse to open
(the attributes of) directories
* Node::Get() and Node::Set() now make use of the encoded attribute type,
as otherwise all created attributes would have the type 'XATR' (instead
of the encoded haiku-specific type)
* minor cleanup with respect to the line width limit
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34904 a95241bf-73f2-0310-859d-f6bbb57e9c96
'+' as part of their name, which is illegal for shell variables (where the
corresponding replacement character is 'X').
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34903 a95241bf-73f2-0310-859d-f6bbb57e9c96
Get the user shell with getpwuid(), since this should be the correct way
to do it (and mmu_man wants it like this).
Note that when opening a new terminal tab, this is ignored, and a fixed
invocation is used (in the Shell class)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34902 a95241bf-73f2-0310-859d-f6bbb57e9c96
Since the former is no longer guarded by any lock, there's a race condition
with vm_page_unreserve_pages() which would cause us to wait longer than
necessary.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34898 a95241bf-73f2-0310-859d-f6bbb57e9c96
sHeapBase will probably not point to memory in the heap area. Use
sFreeHeapBase instead.
* When reserving the heap area range fails, set sHeapBase to NULL, so we'll
later know about the fact.
* hoardSbrk(): When resizing the area fails, we'll now try to allocate a new
one, if the former failure was not due to an "out of memory" situation.
E.g. if the heap range reservation failed or, if we just have exhausted the
range, another area could be in the way. Also when mmap()ing over
malloc()ed, the heap area count be split in two with the first part
retaining the old area ID, thus preventing resizing as well. Fixed#5168.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34897 a95241bf-73f2-0310-859d-f6bbb57e9c96
(--update must be given as first option, but can be followed by others)
* added simple perl scripts that is used by configure to convert BuildSetup
from jam to shell format
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34896 a95241bf-73f2-0310-859d-f6bbb57e9c96
Use convert_to/from_utf8() directly instead of the homebrewn proxy methods.
Removed CodeConv from the repository.
Remove UTF8WidthTbl.c from the repository, since it's not used anymore.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34894 a95241bf-73f2-0310-859d-f6bbb57e9c96
TermParse::StopThreads() in Shell::DetachBuffer() to be never called.
Moved initialization of termios struct to its own functions.
Added const to some methods.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34893 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Determine HOST_LD and HOST_OBJCOPY in configure.
* Removed Solaris ld work-around in BuildSetup.
The change requires configure to be re-run. Alternatively HOST_{LD,OBJCOPY}
can be added to generated/build/BuildConfig.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34892 a95241bf-73f2-0310-859d-f6bbb57e9c96
TODO: determine which other command line tools may also fit under this new group.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34889 a95241bf-73f2-0310-859d-f6bbb57e9c96
sUnreservedFreePages which tracks the difference between free/clear and
reserved pages. Access to it uses atomic operations which allows the three
page (un)reservation to avoid locking in most cases, thus reducing contention
of the "pages" lock.
In the -j8 Haiku image build that decreases the contention of the "pages"
lock to about one third of the previous value. As a positive side effect the
VMCache lock contention drops about the same factor. The total build speedup
is about 20%, the total kernel time drops about 20%.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34888 a95241bf-73f2-0310-859d-f6bbb57e9c96
