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authorFlorin Coras <fcoras@cisco.com>2018-01-24 10:49:23 -0800
committerFlorin Coras <florin.coras@gmail.com>2018-01-27 19:02:12 +0000
commit84a30ef2b51d0dc60176f4a93c90134bb443a260 (patch)
tree58e8a07acc454c74f25c39526ce9863b15a6ac5e /src/vnet/session
parent6484a682153cf3ec057f0643d73cce688ad0eb41 (diff)
session: use clib rwlocks instead of custom implementation
Change-Id: I68933d709ce9cc686ba06466e136434b663920ef Signed-off-by: Florin Coras <fcoras@cisco.com>
Diffstat (limited to 'src/vnet/session')
-rw-r--r--src/vnet/session/session.c15
-rw-r--r--src/vnet/session/session.h21
2 files changed, 9 insertions, 27 deletions
diff --git a/src/vnet/session/session.c b/src/vnet/session/session.c
index ec6d7812f0b..ae8c42aa32b 100644
--- a/src/vnet/session/session.c
+++ b/src/vnet/session/session.c
@@ -85,12 +85,12 @@ session_alloc (u32 thread_index)
pool_get_aligned_will_expand (smm->sessions[thread_index], will_expand,
CLIB_CACHE_LINE_BYTES);
/* If we have peekers, let them finish */
- if (PREDICT_FALSE (will_expand))
+ if (PREDICT_FALSE (will_expand && vlib_num_workers ()))
{
- clib_spinlock_lock_if_init (&smm->peekers_write_locks[thread_index]);
+ clib_rwlock_writer_lock (&smm->peekers_rw_locks[thread_index]);
pool_get_aligned (session_manager_main.sessions[thread_index], s,
CLIB_CACHE_LINE_BYTES);
- clib_spinlock_unlock_if_init (&smm->peekers_write_locks[thread_index]);
+ clib_rwlock_writer_unlock (&smm->peekers_rw_locks[thread_index]);
}
else
{
@@ -1133,9 +1133,7 @@ session_manager_main_enable (vlib_main_t * vm)
vec_validate (smm->pending_disconnects, num_threads - 1);
vec_validate (smm->free_event_vector, num_threads - 1);
vec_validate (smm->vpp_event_queues, num_threads - 1);
- vec_validate (smm->session_peekers, num_threads - 1);
- vec_validate (smm->peekers_readers_locks, num_threads - 1);
- vec_validate (smm->peekers_write_locks, num_threads - 1);
+ vec_validate (smm->peekers_rw_locks, num_threads - 1);
for (i = 0; i < TRANSPORT_N_PROTO; i++)
for (j = 0; j < num_threads; j++)
@@ -1153,10 +1151,7 @@ session_manager_main_enable (vlib_main_t * vm)
vec_validate (smm->pending_disconnects[i], 0);
_vec_len (smm->pending_disconnects[i]) = 0;
if (num_threads > 1)
- {
- clib_spinlock_init (&smm->peekers_readers_locks[i]);
- clib_spinlock_init (&smm->peekers_write_locks[i]);
- }
+ clib_rwlock_init (&smm->peekers_rw_locks[i]);
}
#if SESSION_DBG
diff --git a/src/vnet/session/session.h b/src/vnet/session/session.h
index da9332a2a10..d0bf95c41e4 100644
--- a/src/vnet/session/session.h
+++ b/src/vnet/session/session.h
@@ -118,12 +118,8 @@ struct _session_manager_main
/** Per worker thread session pools */
stream_session_t **sessions;
- /** Per worker-thread count of threads peeking into the session pool */
- u32 *session_peekers;
-
- /** Per worker-thread rw peekers locks */
- clib_spinlock_t *peekers_readers_locks;
- clib_spinlock_t *peekers_write_locks;
+ /** Per worker-thread session pool peekers rw locks */
+ clib_rwlock_t *peekers_rw_locks;
/** Pool of listen sessions. Same type as stream sessions to ease lookups */
stream_session_t **listen_sessions;
@@ -316,11 +312,7 @@ session_pool_add_peeker (u32 thread_index)
session_manager_main_t *smm = &session_manager_main;
if (thread_index == vlib_get_thread_index ())
return;
- clib_spinlock_lock_if_init (&smm->peekers_readers_locks[thread_index]);
- smm->session_peekers[thread_index] += 1;
- if (smm->session_peekers[thread_index] == 1)
- clib_spinlock_lock_if_init (&smm->peekers_write_locks[thread_index]);
- clib_spinlock_unlock_if_init (&smm->peekers_readers_locks[thread_index]);
+ clib_rwlock_reader_lock (&smm->peekers_rw_locks[thread_index]);
}
always_inline void
@@ -329,12 +321,7 @@ session_pool_remove_peeker (u32 thread_index)
session_manager_main_t *smm = &session_manager_main;
if (thread_index == vlib_get_thread_index ())
return;
- ASSERT (session_manager_main.session_peekers[thread_index] > 0);
- clib_spinlock_lock_if_init (&smm->peekers_readers_locks[thread_index]);
- smm->session_peekers[thread_index] -= 1;
- if (smm->session_peekers[thread_index] == 0)
- clib_spinlock_unlock_if_init (&smm->peekers_write_locks[thread_index]);
- clib_spinlock_unlock_if_init (&smm->peekers_readers_locks[thread_index]);
+ clib_rwlock_reader_unlock (&smm->peekers_rw_locks[thread_index]);
}
/**