diff options
Diffstat (limited to 'sys/kern/kern_rwlock.c')
| -rw-r--r-- | sys/kern/kern_rwlock.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/sys/kern/kern_rwlock.c b/sys/kern/kern_rwlock.c index 5b356b2..2d73220 100644 --- a/sys/kern/kern_rwlock.c +++ b/sys/kern/kern_rwlock.c @@ -44,6 +44,7 @@ __FBSDID("$FreeBSD$"); #include <sys/mutex.h> #include <sys/proc.h> #include <sys/rwlock.h> +#include <sys/sched.h> #include <sys/sysctl.h> #include <sys/systm.h> #include <sys/turnstile.h> @@ -423,6 +424,9 @@ __rw_rlock(volatile uintptr_t *c, const char *file, int line) CTR3(KTR_LOCK, "%s: spinning on %p held by %p", __func__, rw, owner); + KTR_STATE1(KTR_SCHED, "thread", + sched_tdname(curthread), "spinning", + "lockname:\"%s\"", rw->lock_object.lo_name); while ((struct thread*)RW_OWNER(rw->rw_lock) == owner && TD_IS_RUNNING(owner)) { cpu_spinwait(); @@ -430,16 +434,23 @@ __rw_rlock(volatile uintptr_t *c, const char *file, int line) spin_cnt++; #endif } + KTR_STATE0(KTR_SCHED, "thread", + sched_tdname(curthread), "running"); continue; } } else if (spintries < rowner_retries) { spintries++; + KTR_STATE1(KTR_SCHED, "thread", sched_tdname(curthread), + "spinning", "lockname:\"%s\"", + rw->lock_object.lo_name); for (i = 0; i < rowner_loops; i++) { v = rw->rw_lock; if ((v & RW_LOCK_READ) == 0 || RW_CAN_READ(v)) break; cpu_spinwait(); } + KTR_STATE0(KTR_SCHED, "thread", sched_tdname(curthread), + "running"); if (i != rowner_loops) continue; } @@ -759,6 +770,9 @@ __rw_wlock_hard(volatile uintptr_t *c, uintptr_t tid, const char *file, if (LOCK_LOG_TEST(&rw->lock_object, 0)) CTR3(KTR_LOCK, "%s: spinning on %p held by %p", __func__, rw, owner); + KTR_STATE1(KTR_SCHED, "thread", sched_tdname(curthread), + "spinning", "lockname:\"%s\"", + rw->lock_object.lo_name); while ((struct thread*)RW_OWNER(rw->rw_lock) == owner && TD_IS_RUNNING(owner)) { cpu_spinwait(); @@ -766,6 +780,8 @@ __rw_wlock_hard(volatile uintptr_t *c, uintptr_t tid, const char *file, spin_cnt++; #endif } + KTR_STATE0(KTR_SCHED, "thread", sched_tdname(curthread), + "running"); continue; } if ((v & RW_LOCK_READ) && RW_READERS(v) && @@ -777,11 +793,16 @@ __rw_wlock_hard(volatile uintptr_t *c, uintptr_t tid, const char *file, } } spintries++; + KTR_STATE1(KTR_SCHED, "thread", sched_tdname(curthread), + "spinning", "lockname:\"%s\"", + rw->lock_object.lo_name); for (i = 0; i < rowner_loops; i++) { if ((rw->rw_lock & RW_LOCK_WRITE_SPINNER) == 0) break; cpu_spinwait(); } + KTR_STATE0(KTR_SCHED, "thread", sched_tdname(curthread), + "running"); #ifdef KDTRACE_HOOKS spin_cnt += rowner_loops - i; #endif |
