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Code Issues Releases Activity

KConditionVariable/KAddressArbiter: no need for global compare thread

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This commit is contained in:
Michael Scire 2020-12-01 16:19:39 -08:00
parent 4f00303daf
commit 25e1d34017
6 changed files with 124 additions and 23 deletions
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2
libraries/libmesosphere/include/mesosphere/kern_k_condition_variable.hpp
View file

@ -20,8 +20,6 @@
namespace ams::kern {
extern KThread g_cv_arbiter_compare_thread;
class KConditionVariable {
public:
using ThreadTree = typename KThread::ConditionVariableThreadTreeType;

18
libraries/libmesosphere/include/mesosphere/kern_k_thread.hpp
View file

@ -124,7 +124,21 @@ namespace ams::kern {
static_assert(sizeof(SyncObjectBuffer::sync_objects) == sizeof(SyncObjectBuffer::handles));
struct ConditionVariableComparator {
static constexpr ALWAYS_INLINE int Compare(const KThread &lhs, const KThread &rhs) {
struct LightCompareType {
uintptr_t cv_key;
s32 priority;
constexpr ALWAYS_INLINE uintptr_t GetConditionVariableKey() const {
return this->cv_key;
}
constexpr ALWAYS_INLINE s32 GetPriority() const {
return this->priority;
}
};
template<typename T> requires (std::same_as<T, KThread> || std::same_as<T, LightCompareType>)
static constexpr ALWAYS_INLINE int Compare(const T &lhs, const KThread &rhs) {
const uintptr_t l_key = lhs.GetConditionVariableKey();
const uintptr_t r_key = rhs.GetConditionVariableKey();
@ -139,6 +153,8 @@ namespace ams::kern {
}
}
};
static_assert(ams::util::HasLightCompareType<ConditionVariableComparator>);
static_assert(std::same_as<ams::util::LightCompareType<ConditionVariableComparator, void>, ConditionVariableComparator::LightCompareType>);
private:
static inline std::atomic<u64> s_next_thread_id = 0;
private:

12
libraries/libmesosphere/source/kern_k_address_arbiter.cpp
View file

@ -50,9 +50,8 @@ namespace ams::kern {
s32 num_waiters = 0;
{
KScopedSchedulerLock sl;
g_cv_arbiter_compare_thread.SetupForAddressArbiterCompare(addr, -1);
auto it = this->tree.nfind(g_cv_arbiter_compare_thread);
auto it = this->tree.nfind_light({ addr, -1 });
while ((it != this->tree.end()) && (count <= 0 || num_waiters < count) && (it->GetAddressArbiterKey() == addr)) {
KThread *target_thread = std::addressof(*it);
target_thread->SetSyncedObject(nullptr, ResultSuccess());
@ -79,10 +78,7 @@ namespace ams::kern {
R_UNLESS(UpdateIfEqual(std::addressof(user_value), addr, value, value + 1), svc::ResultInvalidCurrentMemory());
R_UNLESS(user_value == value, svc::ResultInvalidState());
g_cv_arbiter_compare_thread.SetupForAddressArbiterCompare(addr, -1);
auto it = this->tree.nfind(g_cv_arbiter_compare_thread);
auto it = this->tree.nfind_light({ addr, -1 });
while ((it != this->tree.end()) && (count <= 0 || num_waiters < count) && (it->GetAddressArbiterKey() == addr)) {
KThread *target_thread = std::addressof(*it);
target_thread->SetSyncedObject(nullptr, ResultSuccess());
@ -103,10 +99,8 @@ namespace ams::kern {
s32 num_waiters = 0;
{
KScopedSchedulerLock sl;
g_cv_arbiter_compare_thread.SetupForAddressArbiterCompare(addr, -1);
auto it = this->tree.nfind(g_cv_arbiter_compare_thread);
auto it = this->tree.nfind_light({ addr, -1 });
/* Determine the updated value. */
s32 new_value;
if (GetTargetFirmware() >= TargetFirmware_7_0_0) {

5
libraries/libmesosphere/source/kern_k_condition_variable.cpp
View file

@ -17,8 +17,6 @@
namespace ams::kern {
constinit KThread g_cv_arbiter_compare_thread;
namespace {
ALWAYS_INLINE bool ReadFromUser(u32 *out, KProcessAddress address) {
@ -179,9 +177,8 @@ namespace ams::kern {
int num_waiters = 0;
{
KScopedSchedulerLock sl;
g_cv_arbiter_compare_thread.SetupForConditionVariableCompare(cv_key, -1);
auto it = this->tree.nfind(g_cv_arbiter_compare_thread);
auto it = this->tree.nfind_light({ cv_key, -1 });
while ((it != this->tree.end()) && (count <= 0 || num_waiters < count) && (it->GetConditionVariableKey() == cv_key)) {
KThread *target_thread = std::addressof(*it);

63
libraries/libvapours/include/freebsd/sys/tree.h
View file

@ -400,6 +400,8 @@ struct { \
RB_PROTOTYPE_REMOVE(name, type, attr); \
RB_PROTOTYPE_FIND(name, type, attr); \
RB_PROTOTYPE_NFIND(name, type, attr); \
RB_PROTOTYPE_FIND_LIGHT(name, type, attr); \
RB_PROTOTYPE_NFIND_LIGHT(name, type, attr); \
RB_PROTOTYPE_NEXT(name, type, attr); \
RB_PROTOTYPE_PREV(name, type, attr); \
RB_PROTOTYPE_MINMAX(name, type, attr);
@ -415,6 +417,10 @@ struct { \
attr struct type *name##_RB_FIND(struct name *, struct type *)
#define RB_PROTOTYPE_NFIND(name, type, attr) \
attr struct type *name##_RB_NFIND(struct name *, struct type *)
#define RB_PROTOTYPE_FIND_LIGHT(name, type, attr) \
attr struct type *name##_RB_FIND_LIGHT(struct name *, const void *)
#define RB_PROTOTYPE_NFIND_LIGHT(name, type, attr) \
attr struct type *name##_RB_NFIND_LIGHT(struct name *, const void *)
#define RB_PROTOTYPE_NEXT(name, type, attr) \
attr struct type *name##_RB_NEXT(struct type *)
#define RB_PROTOTYPE_PREV(name, type, attr) \
@ -436,15 +442,17 @@ struct { \
RB_GENERATE_PREV(name, type, field, attr) \
RB_GENERATE_MINMAX(name, type, field, attr)
#define RB_GENERATE_WITH_COMPARE(name, type, field, cmp) \
RB_GENERATE_WITH_COMPARE_INTERNAL(name, type, field, cmp,)
#define RB_GENERATE_WITH_COMPARE_STATIC(name, type, field, cmp) \
RB_GENERATE_WITH_COMPARE_INTERNAL(name, type, field, cmp, __unused static)
#define RB_GENERATE_WITH_COMPARE_INTERNAL(name, type, field, cmp, attr) \
#define RB_GENERATE_WITH_COMPARE(name, type, field, cmp, lcmp) \
RB_GENERATE_WITH_COMPARE_INTERNAL(name, type, field, cmp, lcmp,)
#define RB_GENERATE_WITH_COMPARE_STATIC(name, type, field, cmp, lcmp) \
RB_GENERATE_WITH_COMPARE_INTERNAL(name, type, field, cmp, lcmp, __unused static)
#define RB_GENERATE_WITH_COMPARE_INTERNAL(name, type, field, cmp, lcmp, attr) \
RB_GENERATE_INSERT_COLOR(name, type, field, attr) \
RB_GENERATE_INSERT(name, type, field, cmp, attr) \
RB_GENERATE_FIND(name, type, field, cmp, attr) \
RB_GENERATE_NFIND(name, type, field, cmp, attr)
RB_GENERATE_NFIND(name, type, field, cmp, attr) \
RB_GENERATE_FIND_LIGHT(name, type, field, lcmp, attr) \
RB_GENERATE_NFIND_LIGHT(name, type, field, lcmp, attr)
#define RB_GENERATE_ALL(name, type, field, cmp) \
RB_GENERATE_ALL_INTERNAL(name, type, field, cmp,)
@ -719,6 +727,47 @@ name##_RB_NFIND(struct name *head, struct type *elm) \
return (res); \
}
#define RB_GENERATE_FIND_LIGHT(name, type, field, lcmp, attr) \
/* Finds the node with the same key as elm */ \
attr struct type * \
name##_RB_FIND_LIGHT(struct name *head, const void *lelm) \
{ \
struct type *tmp = RB_ROOT(head); \
int comp; \
while (tmp) { \
comp = lcmp(lelm, tmp); \
if (comp < 0) \
tmp = RB_LEFT(tmp, field); \
else if (comp > 0) \
tmp = RB_RIGHT(tmp, field); \
else \
return (tmp); \
} \
return (NULL); \
}
#define RB_GENERATE_NFIND_LIGHT(name, type, field, lcmp, attr) \
/* Finds the first node greater than or equal to the search key */ \
attr struct type * \
name##_RB_NFIND_LIGHT(struct name *head, const void *lelm) \
{ \
struct type *tmp = RB_ROOT(head); \
struct type *res = NULL; \
int comp; \
while (tmp) { \
comp = lcmp(lelm, tmp); \
if (comp < 0) { \
res = tmp; \
tmp = RB_LEFT(tmp, field); \
} \
else if (comp > 0) \
tmp = RB_RIGHT(tmp, field); \
else \
return (tmp); \
} \
return (res); \
}
#define RB_GENERATE_NEXT(name, type, field, attr) \
/* ARGSUSED */ \
attr struct type * \
@ -788,6 +837,8 @@ name##_RB_MINMAX(struct name *head, int val) \
#define RB_REMOVE(name, x, y) name##_RB_REMOVE(x, y)
#define RB_FIND(name, x, y) name##_RB_FIND(x, y)
#define RB_NFIND(name, x, y) name##_RB_NFIND(x, y)
#define RB_FIND_LIGHT(name, x, y) name##_RB_FIND_LIGHT(x, y)
#define RB_NFIND_LIGHT(name, x, y) name##_RB_NFIND_LIGHT(x, y)
#define RB_NEXT(name, x, y) name##_RB_NEXT(y)
#define RB_PREV(name, x, y) name##_RB_PREV(y)
#define RB_MIN(name, x) name##_RB_MINMAX(x, RB_NEGINF)

47
libraries/libvapours/include/vapours/util/util_intrusive_red_black_tree.hpp
View file

@ -235,6 +235,27 @@ namespace ams::util {
}
template<typename T>
concept HasLightCompareType = requires {
{ std::is_same<typename T::LightCompareType, void>::value } -> std::convertible_to<bool>;
};
namespace impl {
template<typename T, typename Default>
consteval auto *GetLightCompareType() {
if constexpr (HasLightCompareType<T>) {
return static_cast<typename T::LightCompareType *>(nullptr);
} else {
return static_cast<Default *>(nullptr);
}
}
}
template<typename T, typename Default>
using LightCompareType = typename std::remove_pointer<decltype(impl::GetLightCompareType<T, Default>())>::type;
template<class T, class Traits, class Comparator>
class IntrusiveRedBlackTree {
NON_COPYABLE(IntrusiveRedBlackTree);
@ -258,6 +279,10 @@ namespace ams::util {
using iterator = Iterator<false>;
using const_iterator = Iterator<true>;
using light_value_type = LightCompareType<Comparator, value_type>;
using const_light_pointer = const light_value_type *;
using const_light_reference = const light_value_type &;
template<bool Const>
class Iterator {
public:
@ -325,12 +350,16 @@ namespace ams::util {
};
private:
/* Generate static implementations for comparison operations for IntrusiveRedBlackTreeRoot. */
RB_GENERATE_WITH_COMPARE_STATIC(IntrusiveRedBlackTreeRootWithCompare, IntrusiveRedBlackTreeNode, entry, CompareImpl);
RB_GENERATE_WITH_COMPARE_STATIC(IntrusiveRedBlackTreeRootWithCompare, IntrusiveRedBlackTreeNode, entry, CompareImpl, LightCompareImpl);
private:
static int CompareImpl(const IntrusiveRedBlackTreeNode *lhs, const IntrusiveRedBlackTreeNode *rhs) {
return Comparator::Compare(*Traits::GetParent(lhs), *Traits::GetParent(rhs));
}
static int LightCompareImpl(const void *elm, const IntrusiveRedBlackTreeNode *rhs) {
return Comparator::Compare(*static_cast<const_light_pointer>(elm), *Traits::GetParent(rhs));
}
/* Define accessors using RB_* functions. */
IntrusiveRedBlackTreeNode *InsertImpl(IntrusiveRedBlackTreeNode *node) {
return RB_INSERT(IntrusiveRedBlackTreeRootWithCompare, static_cast<IntrusiveRedBlackTreeRootWithCompare *>(&this->impl.root), node);
@ -343,6 +372,14 @@ namespace ams::util {
IntrusiveRedBlackTreeNode *NFindImpl(IntrusiveRedBlackTreeNode const *node) const {
return RB_NFIND(IntrusiveRedBlackTreeRootWithCompare, const_cast<IntrusiveRedBlackTreeRootWithCompare *>(static_cast<const IntrusiveRedBlackTreeRootWithCompare *>(&this->impl.root)), const_cast<IntrusiveRedBlackTreeNode *>(node));
}
IntrusiveRedBlackTreeNode *FindLightImpl(const_light_pointer lelm) const {
return RB_FIND_LIGHT(IntrusiveRedBlackTreeRootWithCompare, const_cast<IntrusiveRedBlackTreeRootWithCompare *>(static_cast<const IntrusiveRedBlackTreeRootWithCompare *>(&this->impl.root)), static_cast<const void *>(lelm));
}
IntrusiveRedBlackTreeNode *NFindLightImpl(const_light_pointer lelm) const {
return RB_NFIND_LIGHT(IntrusiveRedBlackTreeRootWithCompare, const_cast<IntrusiveRedBlackTreeRootWithCompare *>(static_cast<const IntrusiveRedBlackTreeRootWithCompare *>(&this->impl.root)), static_cast<const void *>(lelm));
}
public:
constexpr ALWAYS_INLINE IntrusiveRedBlackTree() : impl() { /* ... */ }
@ -417,6 +454,14 @@ namespace ams::util {
iterator nfind(const_reference ref) const {
return iterator(this->NFindImpl(Traits::GetNode(std::addressof(ref))));
}
iterator find_light(const_light_reference ref) const {
return iterator(this->FindLightImpl(std::addressof(ref)));
}
iterator nfind_light(const_light_reference ref) const {
return iterator(this->NFindLightImpl(std::addressof(ref)));
}
};
template<auto T, class Derived = util::impl::GetParentType<T>>