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authorjaszha03 <jason.zhang2@arm.com>2019-07-11 20:47:24 +0000
committerDave Barach <openvpp@barachs.net>2019-07-31 13:53:55 +0000
commit5cdde5c25a0e71d923a6d56e5c94e058887f95d8 (patch)
treec54eeb5a91ce67417806fabd1fca8d287993e71d /src/vnet/util
parent9a4e631890a70978d414b4937cb94b50cfd778e6 (diff)
vppinfra: refactor test_and_set spinlocks to use clib_spinlock_t
Spinlock performance improved when implemented with compare_and_exchange instead of test_and_set. All instances of test_and_set locks were refactored to use clib_spinlock_t when possible. Some locks e.g. ssvm synchronize between processes rather than threads, so they cannot directly use clib_spinlock_t. Type: refactor Change-Id: Ia16b5d4cd49209b2b57b8df6c94615c28b11bb60 Signed-off-by: Jason Zhang <jason.zhang2@arm.com> Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com> Reviewed-by: Lijian Zhang <Lijian.Zhang@arm.com>
Diffstat (limited to 'src/vnet/util')
-rw-r--r--src/vnet/util/refcount.h16
1 files changed, 7 insertions, 9 deletions
diff --git a/src/vnet/util/refcount.h b/src/vnet/util/refcount.h
index 873ab6def69..4c7d7bdbdd5 100644
--- a/src/vnet/util/refcount.h
+++ b/src/vnet/util/refcount.h
@@ -30,6 +30,7 @@
*/
#include <vnet/vnet.h>
+#include <vppinfra/lock.h>
/*
* Reference counting
@@ -41,7 +42,7 @@
*/
typedef struct {
u32 *counters;
- volatile u32 *counter_lock;
+ clib_spinlock_t counter_lock;
CLIB_CACHE_LINE_ALIGN_MARK(o);
} vlib_refcount_per_cpu_t;
@@ -50,16 +51,15 @@ typedef struct {
} vlib_refcount_t;
static_always_inline
-void vlib_refcount_lock (volatile u32 *counter_lock)
+void vlib_refcount_lock (clib_spinlock_t counter_lock)
{
- while (clib_atomic_test_and_set (counter_lock))
- ;
+ clib_spinlock_lock (&counter_lock);
}
static_always_inline
-void vlib_refcount_unlock (volatile u32 *counter_lock)
+void vlib_refcount_unlock (clib_spinlock_t counter_lock)
{
- clib_atomic_release(counter_lock);
+ clib_spinlock_unlock (&counter_lock);
}
void __vlib_refcount_resize(vlib_refcount_per_cpu_t *per_cpu, u32 size);
@@ -86,9 +86,7 @@ void vlib_refcount_init(vlib_refcount_t *r)
for (thread_index = 0; thread_index < tm->n_vlib_mains; thread_index++)
{
- r->per_cpu[thread_index].counter_lock =
- clib_mem_alloc_aligned(CLIB_CACHE_LINE_BYTES,CLIB_CACHE_LINE_BYTES);
- r->per_cpu[thread_index].counter_lock[0] = 0;
+ clib_spinlock_init (&r->per_cpu[thread_index].counter_lock);
}
}