diff options
Diffstat (limited to 'tools/perf/bench/futex.h')
| -rw-r--r-- | tools/perf/bench/futex.h | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/tools/perf/bench/futex.h b/tools/perf/bench/futex.h index 40a89f192c53..b3853aac3021 100644 --- a/tools/perf/bench/futex.h +++ b/tools/perf/bench/futex.h @@ -18,6 +18,7 @@ struct bench_futex_parameters { bool fshared; bool mlockall; bool multi; /* lock-pi */ + bool pi; /* requeue-pi */ bool broadcast; /* requeue */ unsigned int runtime; /* seconds*/ unsigned int nthreads; @@ -90,7 +91,7 @@ futex_unlock_pi(u_int32_t *uaddr, int opflags) /** * futex_cmp_requeue() - requeue tasks from uaddr to uaddr2 * @nr_wake: wake up to this many tasks -* @nr_requeue: requeue up to this many tasks +* @nr_requeue: requeue up to this many tasks */ static inline int futex_cmp_requeue(u_int32_t *uaddr, u_int32_t val, u_int32_t *uaddr2, int nr_wake, @@ -99,4 +100,38 @@ futex_cmp_requeue(u_int32_t *uaddr, u_int32_t val, u_int32_t *uaddr2, int nr_wak return futex(uaddr, FUTEX_CMP_REQUEUE, nr_wake, nr_requeue, uaddr2, val, opflags); } + +/** + * futex_wait_requeue_pi() - block on uaddr and prepare to requeue to uaddr2 + * @uaddr: non-PI futex source + * @uaddr2: PI futex target + * + * This is the first half of the requeue_pi mechanism. It shall always be + * paired with futex_cmp_requeue_pi(). + */ +static inline int +futex_wait_requeue_pi(u_int32_t *uaddr, u_int32_t val, u_int32_t *uaddr2, + struct timespec *timeout, int opflags) +{ + return futex(uaddr, FUTEX_WAIT_REQUEUE_PI, val, timeout, uaddr2, 0, + opflags); +} + +/** + * futex_cmp_requeue_pi() - requeue tasks from uaddr to uaddr2 + * @uaddr: non-PI futex source + * @uaddr2: PI futex target + * @nr_requeue: requeue up to this many tasks + * + * This is the second half of the requeue_pi mechanism. It shall always be + * paired with futex_wait_requeue_pi(). The first waker is always awoken. + */ +static inline int +futex_cmp_requeue_pi(u_int32_t *uaddr, u_int32_t val, u_int32_t *uaddr2, + int nr_requeue, int opflags) +{ + return futex(uaddr, FUTEX_CMP_REQUEUE_PI, 1, nr_requeue, uaddr2, + val, opflags); +} + #endif /* _FUTEX_H */ |