diff options
Diffstat (limited to 'kernel/locking/qspinlock_stat.h')
| -rw-r--r-- | kernel/locking/qspinlock_stat.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/locking/qspinlock_stat.h b/kernel/locking/qspinlock_stat.h index b1553ad..94d4533 100644 --- a/kernel/locking/qspinlock_stat.h +++ b/kernel/locking/qspinlock_stat.h @@ -22,6 +22,7 @@ * pv_kick_wake - # of vCPU kicks used for computing pv_latency_wake * pv_latency_kick - average latency (ns) of vCPU kick operation * pv_latency_wake - average latency (ns) from vCPU kick to wakeup + * pv_lock_stealing - # of lock stealing operations * pv_spurious_wakeup - # of spurious wakeups * pv_wait_again - # of vCPU wait's that happened after a vCPU kick * pv_wait_head - # of vCPU wait's at the queue head @@ -43,6 +44,7 @@ enum qlock_stats { qstat_pv_kick_wake, qstat_pv_latency_kick, qstat_pv_latency_wake, + qstat_pv_lock_stealing, qstat_pv_spurious_wakeup, qstat_pv_wait_again, qstat_pv_wait_head, @@ -66,6 +68,7 @@ static const char * const qstat_names[qstat_num + 1] = { [qstat_pv_spurious_wakeup] = "pv_spurious_wakeup", [qstat_pv_latency_kick] = "pv_latency_kick", [qstat_pv_latency_wake] = "pv_latency_wake", + [qstat_pv_lock_stealing] = "pv_lock_stealing", [qstat_pv_wait_again] = "pv_wait_again", [qstat_pv_wait_head] = "pv_wait_head", [qstat_pv_wait_node] = "pv_wait_node", @@ -273,6 +276,19 @@ static inline void __pv_wait(u8 *ptr, u8 val) #define pv_kick(c) __pv_kick(c) #define pv_wait(p, v) __pv_wait(p, v) +/* + * PV unfair trylock count tracking function + */ +static inline int qstat_spin_steal_lock(struct qspinlock *lock) +{ + int ret = pv_queued_spin_steal_lock(lock); + + qstat_inc(qstat_pv_lock_stealing, ret); + return ret; +} +#undef queued_spin_trylock +#define queued_spin_trylock(l) qstat_spin_steal_lock(l) + #else /* CONFIG_QUEUED_LOCK_STAT */ static inline void qstat_inc(enum qlock_stats stat, bool cond) { } |