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hw: re-add priority down-scaling 

This is a follow-up commit for "hw: beautify scheduling-priority code".

ref #960
This commit is contained in:
Martin Stein 2013-11-20 23:35:02 +01:00 committed by Norman Feske
parent 883aa83e62
commit 07aa56fffb
4 changed files with 17 additions and 15 deletions
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14
base-hw/src/core/include/platform_thread.h
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@ -78,21 +78,21 @@ namespace Genode {
/** /**
* Constructor for core threads * Constructor for core threads
* *
* \param label debugging label
* \param stack_size initial size of the stack * \param stack_size initial size of the stack
* \param pd_id kernel name of targeted protection domain * \param pd_id kernel name of targeted protection domain
* \param label debugging label
*/ */
Platform_thread(const char * const label, size_t const stack_size, Platform_thread(size_t const stack_size,
unsigned const pd_id); unsigned const pd_id, const char * const label);
/** /**
* Constructor for threads outside of core * Constructor for threads outside of core
* *
* \param label debugging label * \param label debugging label
* \param priority processor-scheduling priority * \param virt_prio unscaled processor-scheduling priority
* \param utcb core local pointer to userland thread-context * \param utcb core local pointer to userland thread-context
*/ */
Platform_thread(const char * const label, unsigned const priority, Platform_thread(const char * const label, unsigned const virt_prio,
addr_t const utcb); addr_t const utcb);
/** /**

2
base-hw/src/core/kernel/configuration.h
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@ -24,7 +24,7 @@ namespace Kernel
MAX_SIGNAL_RECEIVERS = 256, MAX_SIGNAL_RECEIVERS = 256,
MAX_SIGNAL_CONTEXTS = 2048, MAX_SIGNAL_CONTEXTS = 2048,
MAX_VMS = 4, MAX_VMS = 4,
MAX_PRIORITY = 255, MAX_PRIORITY = 128,
}; };
} }

12
base-hw/src/core/platform_thread.cc
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@ -73,9 +73,9 @@ Platform_thread::~Platform_thread()
} }
Platform_thread::Platform_thread(const char * const label, Platform_thread::Platform_thread(size_t const stack_size,
size_t const stack_size, unsigned const pd_id,
unsigned const pd_id) const char * const label)
: :
_stack_size(stack_size), _stack_size(stack_size),
_pd_id(pd_id), _pd_id(pd_id),
@ -105,7 +105,7 @@ Platform_thread::Platform_thread(const char * const label,
Platform_thread::Platform_thread(const char * const label, Platform_thread::Platform_thread(const char * const label,
unsigned const priority, unsigned const virt_prio,
addr_t const utcb) addr_t const utcb)
: :
_stack_size(0), _stack_size(0),
@ -132,7 +132,9 @@ Platform_thread::Platform_thread(const char * const label,
_utcb_phys = (Native_utcb *)ram->phys_addr(_utcb); _utcb_phys = (Native_utcb *)ram->phys_addr(_utcb);
/* create kernel object */ /* create kernel object */
_id = Kernel::new_thread(_kernel_thread, priority, _label); enum { MAX_PRIO = Kernel::Priority::MAX };
auto const phys_prio = Cpu_session::scale_priority(MAX_PRIO, virt_prio);
_id = Kernel::new_thread(_kernel_thread, phys_prio, _label);
if (!_id) { if (!_id) {
PERR("failed to create kernel object"); PERR("failed to create kernel object");
throw Cpu_session::Thread_creation_failed(); throw Cpu_session::Thread_creation_failed();

4
base-hw/src/core/thread.cc
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@ -54,12 +54,12 @@ void Thread_base::_thread_start()
} }
Thread_base::Thread_base(const char *name, size_t stack_size) Thread_base::Thread_base(const char * const label, size_t const stack_size)
: :
_list_element(this) _list_element(this)
{ {
_tid.platform_thread = new (platform()->core_mem_alloc()) _tid.platform_thread = new (platform()->core_mem_alloc())
Platform_thread(name, stack_size, Kernel::core_id()); Platform_thread(stack_size, Kernel::core_id(), label);
} }