search for: pv_lock_stat

...tatic u32 halt_qnode_stats; /* Queue node halting count */ +static u32 wake_kick_stats; /* Wakeup by kicking count */ +static u32 wake_spur_stats; /* Spurious wakeup count */ + +static inline void xen_kick_stats(void) +{ + add_smp(&kick_stats, 1); +} + +static inline void xen_halt_stats(enum pv_lock_stats type) +{ + if (type == PV_HALT_QHEAD) + add_smp(&halt_qhead_stats, 1); + else /* type == PV_HALT_QNODE */ + add_smp(&halt_qnode_stats, 1); +} + +static inline void xen_lock_stats(enum pv_lock_stats type) +{ + if (type == PV_WAKE_KICKED) + add_smp(&wake_kick_stats, 1); + else if (typ...

..._stats); > + debugfs_create_u32("wake_spur_stats", > + 0644, d_spin_debug, &wake_spur_stats); > + debugfs_create_u64("time_blocked", > + 0644, d_spin_debug, &time_blocked); > + return 0; > +} > + > +static inline void kvm_halt_stats(enum pv_lock_stats type) > +{ > + if (type == PV_HALT_QHEAD) > + add_smp(&halt_qhead_stats, 1); > + else if (type == PV_HALT_QNODE) > + add_smp(&halt_qnode_stats, 1); > + else /* type == PV_HALT_ABORT */ > + add_smp(&halt_abort_stats, 1); > +} > + > +static inline void kv...

..._stats); > + debugfs_create_u32("wake_spur_stats", > + 0644, d_spin_debug, &wake_spur_stats); > + debugfs_create_u64("time_blocked", > + 0644, d_spin_debug, &time_blocked); > + return 0; > +} > + > +static inline void kvm_halt_stats(enum pv_lock_stats type) > +{ > + if (type == PV_HALT_QHEAD) > + add_smp(&halt_qhead_stats, 1); > + else if (type == PV_HALT_QNODE) > + add_smp(&halt_qnode_stats, 1); > + else /* type == PV_HALT_ABORT */ > + add_smp(&halt_abort_stats, 1); > +} > + > +static inline void kv...

...0644, d_spin_debug, &wake_kick_stats); + debugfs_create_u32("wake_spur_stats", + 0644, d_spin_debug, &wake_spur_stats); + debugfs_create_u64("time_blocked", + 0644, d_spin_debug, &time_blocked); + return 0; +} + +static inline void kvm_halt_stats(enum pv_lock_stats type) +{ + if (type == PV_HALT_QHEAD) + add_smp(&halt_qhead_stats, 1); + else if (type == PV_HALT_QNODE) + add_smp(&halt_qnode_stats, 1); + else /* type == PV_HALT_ABORT */ + add_smp(&halt_abort_stats, 1); +} + +static inline void kvm_lock_stats(enum pv_lock_stats type) +{ + if (typ...

...0644, d_spin_debug, &wake_kick_stats); + debugfs_create_u32("wake_spur_stats", + 0644, d_spin_debug, &wake_spur_stats); + debugfs_create_u64("time_blocked", + 0644, d_spin_debug, &time_blocked); + return 0; +} + +static inline void kvm_halt_stats(enum pv_lock_stats type) +{ + if (type == PV_HALT_QHEAD) + add_smp(&halt_qhead_stats, 1); + else if (type == PV_HALT_QNODE) + add_smp(&halt_qnode_stats, 1); + else /* type == PV_HALT_ABORT */ + add_smp(&halt_abort_stats, 1); +} + +void kvm_lock_stats(enum pv_lock_stats type) +{ + if (type == PV_WAKE_K...

...0644, d_spin_debug, &wake_kick_stats); + debugfs_create_u32("wake_spur_stats", + 0644, d_spin_debug, &wake_spur_stats); + debugfs_create_u64("time_blocked", + 0644, d_spin_debug, &time_blocked); + return 0; +} + +static inline void kvm_halt_stats(enum pv_lock_stats type) +{ + if (type == PV_HALT_QHEAD) + add_smp(&halt_qhead_stats, 1); + else if (type == PV_HALT_QNODE) + add_smp(&halt_qnode_stats, 1); + else /* type == PV_HALT_ABORT */ + add_smp(&halt_abort_stats, 1); +} + +void kvm_lock_stats(enum pv_lock_stats type) +{ + if (type == PV_WAKE_K...

v10->v11: - Use a simple test-and-set unfair lock to simplify the code, but performance may suffer a bit for large guest with many CPUs. - Take out Raghavendra KT's test results as the unfair lock changes may render some of his results invalid. - Add PV support without increasing the size of the core queue node structure. - Other minor changes to address some of the

v10->v11: - Use a simple test-and-set unfair lock to simplify the code, but performance may suffer a bit for large guest with many CPUs. - Take out Raghavendra KT's test results as the unfair lock changes may render some of his results invalid. - Add PV support without increasing the size of the core queue node structure. - Other minor changes to address some of the

v9->v10: - Make some minor changes to qspinlock.c to accommodate review feedback. - Change author to PeterZ for 2 of the patches. - Include Raghavendra KT's test results in patch 18. v8->v9: - Integrate PeterZ's version of the queue spinlock patch with some modification: http://lkml.kernel.org/r/20140310154236.038181843 at infradead.org - Break the more complex

v9->v10: - Make some minor changes to qspinlock.c to accommodate review feedback. - Change author to PeterZ for 2 of the patches. - Include Raghavendra KT's test results in patch 18. v8->v9: - Integrate PeterZ's version of the queue spinlock patch with some modification: http://lkml.kernel.org/r/20140310154236.038181843 at infradead.org - Break the more complex

v7->v8: - Remove one unneeded atomic operation from the slowpath, thus improving performance. - Simplify some of the codes and add more comments. - Test for X86_FEATURE_HYPERVISOR CPU feature bit to enable/disable unfair lock. - Reduce unfair lock slowpath lock stealing frequency depending on its distance from the queue head. - Add performance data for IvyBridge-EX CPU.

v7->v8: - Remove one unneeded atomic operation from the slowpath, thus improving performance. - Simplify some of the codes and add more comments. - Test for X86_FEATURE_HYPERVISOR CPU feature bit to enable/disable unfair lock. - Reduce unfair lock slowpath lock stealing frequency depending on its distance from the queue head. - Add performance data for IvyBridge-EX CPU.

v12->v13: - Change patch 9 to generate separate versions of the queue_spin_lock_slowpath functions for bare metal and PV guest. This reduces the performance impact of the PV code on bare metal systems. v11->v12: - Based on PeterZ's version of the qspinlock patch (https://lkml.org/lkml/2014/6/15/63). - Incorporated many of the review comments from Konrad Wilk and Paolo

v12->v13: - Change patch 9 to generate separate versions of the queue_spin_lock_slowpath functions for bare metal and PV guest. This reduces the performance impact of the PV code on bare metal systems. v11->v12: - Based on PeterZ's version of the qspinlock patch (https://lkml.org/lkml/2014/6/15/63). - Incorporated many of the review comments from Konrad Wilk and Paolo

N.B. Sorry for the duplicate. This patch series were resent as the original one was rejected by the vger.kernel.org list server due to long header. There is no change in content. v7->v8: - Remove one unneeded atomic operation from the slowpath, thus improving performance. - Simplify some of the codes and add more comments. - Test for X86_FEATURE_HYPERVISOR CPU feature bit

N.B. Sorry for the duplicate. This patch series were resent as the original one was rejected by the vger.kernel.org list server due to long header. There is no change in content. v7->v8: - Remove one unneeded atomic operation from the slowpath, thus improving performance. - Simplify some of the codes and add more comments. - Test for X86_FEATURE_HYPERVISOR CPU feature bit

...always_inline void pv_kick_cpu(int cpu) > +{ > + PVOP_VCALLEE1(pv_lock_ops.kick_cpu, cpu); > +} > + > +static __always_inline void pv_lockwait(u8 *lockbyte) > +{ > + PVOP_VCALLEE1(pv_lock_ops.lockwait, lockbyte); > +} > + > +static __always_inline void pv_lockstat(enum pv_lock_stats type) > +{ > + PVOP_VCALLEE1(pv_lock_ops.lockstat, type); > +} Why are any of these PV ops? they're only called from other pv_*() functions. What's the point of pv ops you only call from pv code? > +/* > + * Queue Spinlock Para-Virtualization (PV) Support > + * > + *...

v8->v9: - Integrate PeterZ's version of the queue spinlock patch with some modification: http://lkml.kernel.org/r/20140310154236.038181843 at infradead.org - Break the more complex patches into smaller ones to ease review effort. - Fix a racing condition in the PV qspinlock code. v7->v8: - Remove one unneeded atomic operation from the slowpath, thus improving

v8->v9: - Integrate PeterZ's version of the queue spinlock patch with some modification: http://lkml.kernel.org/r/20140310154236.038181843 at infradead.org - Break the more complex patches into smaller ones to ease review effort. - Fix a racing condition in the PV qspinlock code. v7->v8: - Remove one unneeded atomic operation from the slowpath, thus improving

v11->v12: - Based on PeterZ's version of the qspinlock patch (https://lkml.org/lkml/2014/6/15/63). - Incorporated many of the review comments from Konrad Wilk and Paolo Bonzini. - The pvqspinlock code is largely from my previous version with PeterZ's way of going from queue tail to head and his idea of using callee saved calls to KVM and XEN codes. v10->v11: - Use a