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.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34933 a95241bf-73f2-0310-859d-f6bbb57e9c96
'+' as part of their name, which is illegal for shell variables (where the
corresponding replacement character is 'X').
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(--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
* 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
* let BuildSetup set HAIKU_HOST_IS_BIG_ENDIAN according to HOST_GCC_MACHINE
* minor cleanup in BuildSetup
* when building ICU, set the endianness indicator suffix according to
HAIKU_HOST_IS_BIG_ENDIAN
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34864 a95241bf-73f2-0310-859d-f6bbb57e9c96
so that it can make use of the firmware installed by the OptionalPackage
Wifi-ipw2100+fw.
* Updating OptionalPackages to use the latest Wifi-ipw2100+fw package.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34833 a95241bf-73f2-0310-859d-f6bbb57e9c96
debug heap implementation.
* Added libroot_debug.so to the DevelopmentMin optional package. Since it has
the same soname as the standard libroot, it can simply be specified in
LD_PRELOAD to run a program with that version.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34788 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Added VMCache::MovePage() and MoveAllPages() to move pages between caches.
* VMAnonymousCache:
- _MergeSwapPages(): Avoid doing anything, if neither cache has swapped out
pages.
- _MergeSwapPages() does now also remove source cache pages that are
shadowed by consumer swap pages. This allows us to call _MergeSwapPages()
before _MergePagesSmallerSource(), save the swap page shadowing check
there and get rid of the vm_page::merge_swap flag. This is an
optimization based on the assumption that usually none or only few pages
are swapped out, so we save a lot of checks.
- Implemented _MergePagesSmallerConsumer() as an alternative to
_MergePagesSmallerSource(). The former is used when the source cache has
more pages than the consumer cache. It iterates over the consumer cache's
pages, moves them to the source and finally moves all pages back to the
consumer. The final move is relatively cheap (though unfortunately we
still have to update all pages' vm_page::cache field), so that overall we
save iterations of the main loop with the more expensive checks.
The optimizations particularly improve the common fork()+exec*() situations.
fork() uses CoW, which is implemented by putting two new empty caches between
the to be copied area and its cache. exec*() destroys one copy of the area,
its cache and thus causes merging of the other new cache with the old cache.
Since this usually happens in a very short time, the old cache does still
contain many pages and the new cache only few. Previously the many pages were
all checked and moved individually. Now we do that for the few pages instead.
A very extreme example of this situation is the Haiku image build. jam has a
huge heap (> 200 MB) and it fork()s+exec*()s for every action to be executed.
Since during the cache merging the cache is locked, any write access to a
heap page causes jam to block until the cache merging is done. Formerly that
took so long that it killed a lot of parallelism in multi-job builds. That
could be observed particularly well when lots of small actions where executed
(like the Link, XRes, Mimeset, SetType, SetVersion combos when building
executables/libraries/add-ons). Those look dramatically better now.
The overall speed improvement for a -j8 image build on my machine is only
about 15%, though.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34784 a95241bf-73f2-0310-859d-f6bbb57e9c96
Intel Pro Wireless 2100 and 2200/2945 chipsets in a license correct manner.
Thank you!
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34780 a95241bf-73f2-0310-859d-f6bbb57e9c96
- Replaced the "userOnly" parameter by a "flags" parameter, that allows to
specify kernel and userland stack traces individually.
- x86, m68k: Don't always skip the first frame as that prevents the caller
from being able to record its own address.
* capture_tracing_stack_trace(): Replaced the "userOnly" parameter by
"kernelOnly", since one is probably always interested in the kernel stack
trace, but might not want the userland stack trace.
* Added stack trace support for VM cache kernel tracing.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34742 a95241bf-73f2-0310-859d-f6bbb57e9c96
be run again or generated/build/BuildConfig needs to be adjusted manually.
* Removed bochs debug hack.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34721 a95241bf-73f2-0310-859d-f6bbb57e9c96
Renamed OpenTerminal to Open Terminal, since it sounds much more like a phrase
than a label for an add-on. Fixes#4434.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34676 a95241bf-73f2-0310-859d-f6bbb57e9c96
This driver was confirmed as working stable for a week by Algirdas Buckus.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34675 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
images. The atheros wlan driver isn't included in the NetBootArchive, because
you can't tell the driver, which wlan it should connect to.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34369 a95241bf-73f2-0310-859d-f6bbb57e9c96
release branch. This completes the build system part of #5036.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34275 a95241bf-73f2-0310-859d-f6bbb57e9c96
conditionally define some of the new stuff there. That fixes the build under
a r34172 Haiku, though it also causes some problems that needed working around.
Haven't tested under newer Haiku revisions yet. Will do tomorrow.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34267 a95241bf-73f2-0310-859d-f6bbb57e9c96
compatible platforms as well, Ingo. This fixes building Haiku under Haiku.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34248 a95241bf-73f2-0310-859d-f6bbb57e9c96
and types.h. The idea is to provide a basic architecture/compiler
abstraction by defining types and macros that allow the posix/ and os/
headers to be mostly architecture/compiler agnostic.
* Adjusted the posix/ and os/ headers accordingly.
* <SupportDefs.h>: Introduced B_PRI* and B_SCN* macros similar to the PRI*
and SCN* macros defined in <inttypes.h>, just for the BeOS/Haiku [u]int*
types and some POSIX types (e.g. off_t, dev_t, ino_t) that don't have POSIX
macros. Also the B_PRI* and B_SCN* macros are available unconditionally,
unlike the <inttypes.h> macros, which require __STDC_FORMAT_MACROS to be
defined in C++ mode.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34214 a95241bf-73f2-0310-859d-f6bbb57e9c96
* BuildSetup: Set jam variable HOST_PLATFORM_IS_64_BIT and add host define
HAIKU_HOST_PLATFORM_64_BIT if the host platform is 64 bit. Removed the
check from BeOSBuildCompatibility.h.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34211 a95241bf-73f2-0310-859d-f6bbb57e9c96
build_cross_tools[_gcc4] script which in turn passes it to make. Cores and
hyperthreads are plentiful these days; no need to let most of them idle when
building the cross tools.
* Sorted the configure options alphabetically again.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34199 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
