* Implemented a tiny bit more sophisticated version of
estimate_max_scheduling_latency() that uses a syscall that lets the scheduler
decide.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36170 a95241bf-73f2-0310-859d-f6bbb57e9c96
locks.
* Added syscalls for a new kind of mutex. A mutex consists only of an int32 and
doesn't require any kernel resources. So it's initialization cannot fail
(it consists only of setting the mutex value to 0). An uncontended lock or
unlock operation can basically consist of an atomic_*() in userland. The
syscalls (when the mutex is contended) are a bit more expensive than semaphore
operations, though.
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use for the asm_offsets.cpp file, so it can be reused elsewhere.
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* 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.
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* Therefore, all pthread functions should now work fine on all threads.
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* 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.
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* Added new header headers/private/system/disk_device_types.h, which defines
the <DiskDeviceTypes.h> constants as macros and which can be used where the
constants cannot be used. The constants are defined using the macros, so now
there's only one place where the string literals should be specified.
* Use the macros in the partitioning systems. I was too lazy to also adjust the
file systems -- most of them seem to hard-code the string literal yet.
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Add an __ARM_ARCH__ macro defined to the arch version to simplify checks for >= some version.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32238 a95241bf-73f2-0310-859d-f6bbb57e9c96
each attribute access needed 3 syscalls, now only one as it should.
* Renamed the new Haiku call fs_open_attr() to fs_fopen_attr(), and added a new
function fs_open_attr() that takes a path (same semantics as the
fs_[f]open_attr_dir() functions already present in BeOS).
* Merged former _kern_open_attr(), and _kern_create_attr() into one syscall.
* Cleaned up vfs.h.
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functions.
* Since we now use UserStringParameter, this fixes the missing null termination
of the parameter string, and thus bug #4045.
* Removed UserMemoryParameter, as it's no longer in use.
* Adjusted syscalls accordingly.
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there are prefixed with the respective architecture name. Useful for remote
debugging a different architecture.
* <x86/arch_debugger.h>: Introduced a structure for the FPU state, so that it
isn't left to the debugger.
* Removed the _kern_get_thread_cpu_state() syscall. Was originally intended for
bdb compatiblity, but isn't really needed.
* Kernel x86 arch_get_debug_cpu_state(): The use of fnsave was broken, since
it reinits the FPU after saving the state. This resulted in weird results
when debugging functions using the FPU. We now use fxsave, if available.
Otherwise fnsave + frstor should be used -- not fully implemented yet.
Same for arch_set_debug_cpu_state().
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31682 a95241bf-73f2-0310-859d-f6bbb57e9c96
and added a _kern_unreserve_address_range() as well.
* The runtime loader now reserves the space needed for all its areas first
to make sure there is enough space left for all areas of a single image.
* This also fixes the final part of bug #4008.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31115 a95241bf-73f2-0310-859d-f6bbb57e9c96
the first part of making the runtime loader behave itself; it should already
make Clockwerk run okay with any number of translators (even if not all of
them will work yet).
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* Generalized address checks. The debugger can now also read the commpage.
* Added new syscall _kern_get_thread_cpu_state() to get the CPU state of a
not running thread. Introduced arch_get_thread_debug_cpu_state() for that
purpose, which is only implemented for x86 ATM (uses the new
i386_get_thread_user_iframe()).
* Don't allow a debugger to change a thread's "esp" anymore. That's the esp
register in the kernel. "user_esp" can still be changed.
* Generally set RF (resume flag) in eflags in interrupt handlers, not only
after a instruction breakpoint debug exception. This should prevent
breakpoints from being triggered more than once (e.g. when the breakpoint is
on an instruction that can cause a page fault). I still saw those with bdb
in VMware, but that might be a VMware bug.
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versioning symbols, and private macro DEFINE_LIBROOT_KERNEL_SYMBOL_VERSION()
for symbols compiled into both libroot and kernel.
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C friendly it's not an actual base class, but casting to it is fine.
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- Moved scheduler listening interface to <listeners.h> and added more
convenient to use templatized notification functions.
- Added a listener mechanism for the wait objects (semaphores, condition
variables, mutex, rw_lock).
* system profiler:
- Hopefully fixed locking issues related to notifying the profiler thread
for good. We still had an inconsistent locking order, since the scheduler
notification callbacks are invoked with the thread lock held and have to
acquire the object lock then, while the other callbacks acquired the object
lock first and as a side effect of ConditionVariable::NotifyOne() acquired
the thread lock. Now we make sure the object lock is the innermost lock.
- Track the number of dropped events due to a full buffer.
_user_system_profiler_next_buffer() returns this count now.
- When scheduling profiling events are requested also listen to wait objects
and generate the respective profiling events. We send those events lazily
and cache the infos to avoid resending an event for the same wait object.
- When starting profiling we do now generate "thread scheduled" events for
the already running threads.
- _user_system_profiler_start(): Check whether the parameters pointer is a
userland address at all.
- The system_profiler_team_added event does now also contain the team's name.
* Added a sem_get_name_unsafe() returning a semaphore's name. It is "unsafe",
since the caller has to ensure that the semaphore exists and continues to
exist as long as the returned name is used.
* Adjusted the "profile" and "scheduling_recorder" according to the system
profiling changes. The latter prints the number of dropped events, now.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30345 a95241bf-73f2-0310-859d-f6bbb57e9c96
passed in a structure now, so it is easier to extend it and ignore unused
parameters.
* One can now select which system profiling events one is interested in.
* Added scheduling events to the system profiling interface. Those are pretty
much the ones recorded when scheduler tracing is enabled. Still missing are
the "wait object" events that allow to interpret what a thread is waiting
for.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30243 a95241bf-73f2-0310-859d-f6bbb57e9c96
profiling events.
* profile: Avoid using get_{team,thread}_info() in common code paths. The
system profiling mode is asynchronous, so the team or thread in question
could already be gone.
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device additions/removals can be monitored.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29582 a95241bf-73f2-0310-859d-f6bbb57e9c96
<runtime_loader.h>, since it isn't a kernel <-> userland interface.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@28456 a95241bf-73f2-0310-859d-f6bbb57e9c96
added vm_memcpy_from_physical() and vm_memcpy_physical_page(), and
added respective functions to the vm_translation_map operations. The
architecture specific implementation can now decide how to implement
them most efficiently. Added generic implementations that can be used,
though.
* Changed vm_{get,put}_physical_page(). The former no longer accepts
flags (the only flag PHYSICAL_PAGE_DONT_WAIT wasn't needed anymore).
Instead it returns an implementation-specific handle that has to be
passed to the latter. Added vm_{get,put}_physical_page_current_cpu()
and *_debug() variants, that work only for the current CPU,
respectively when in the kernel debugger. Also adjusted the
vm_translation_map operations accordingly.
* Made consequent use of the physical memory operations in the source
tree.
* Also adjusted the m68k and ppc implementations with respect to the
vm_translation_map operation changes, but they are probably broken,
nevertheless.
* For x86 the generic physical page mapper isn't used anymore. It is
suboptimal in any case. For systems with small memory it is too much
overhead, since one can just map the complete physical memory (that's
not done yet, though). For systems with large memory it counteracts
the VM strategy to reuse the least recently used pages. Since those
pages will most likely not be mapped by the page mapper anymore, it
will keep remapping chunks. This was also the reason why building
Haiku in Haiku was significantly faster with only 256 MB RAM (since
that much could be kept mapped all the time).
Now we're using a different strategy: We have small pools of virtual
page slots per CPU that are used for the physical page operations
(memset_physical(), memcpy_*_physical()) with CPU-pinned thread.
Furthermore we have four slots per translation map, which are used to
map page tables.
These changes speed up the Haiku image build in Haiku significantly. On
my Core2 Duo 2.2 GHz 2 GB machine about 40% to 20 min 40 s (KDEBUG
disabled, block cache debug disabled). Still more than factor 3 slower
than FreeBSD and Linux, though.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@28244 a95241bf-73f2-0310-859d-f6bbb57e9c96
the methods IsFile() and GetFilePath() to BDiskDevice, and
BDiskDeviceRoster::GetFileDeviceForPath().
* Added new syscalls to implement this functionality.
* Added new flag B_DISK_DEVICE_IS_FILE.
* Fixed wrong operator precedence assumption in the BDiskDevice class at
several places.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@28052 a95241bf-73f2-0310-859d-f6bbb57e9c96
r27530 - allow faults with ints disabled if there is a handler
r27648 - call the end-of-interrupt thread callback
r27718 - add <asm_defs.h>, not used yet
r27722 - register the commpage as image and symbols (but we don't use it yet)
- remove dupped call to thread_get_current_thread()
- use 16MB iospace for now, 4MB seems too small.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27999 a95241bf-73f2-0310-859d-f6bbb57e9c96
PHYSICAL_PAGE_{NO,CAN}_WAIT into an actual flag
PHYSICAL_PAGE_DONT_WAIT.
* Pass the flags through to the chunk mapper callback.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27979 a95241bf-73f2-0310-859d-f6bbb57e9c96
I'm not happy with the location, but I didn't see any better one in the
header tree.
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