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authorjaszha03 <jason.zhang2@arm.com>2019-06-12 16:01:19 -0500
committerDave Barach <openvpp@barachs.net>2019-07-30 11:46:19 +0000
commit0455c435af501889de51c79a223883b3c2003b20 (patch)
treec869cd21043469888ee2a23e563e958ce05e3a96 /src/svm
parentd56550c2b669558aa38d93f44a9a3b31e0b9370f (diff)
vppinfra: conformed spinlocks to use CLIB_PAUSE
Modified test-and-set spin locks to call CLIB_PAUSE () when spinning for code consistency. Decreases the memory bandwidth consumed. Type: fix Change-Id: I1cca4f87f44f23f257c7a35466cd2e7767072f51 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/svm')
-rw-r--r--src/svm/ssvm.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/src/svm/ssvm.h b/src/svm/ssvm.h
index 1c0373f126c..6c679456bff 100644
--- a/src/svm/ssvm.h
+++ b/src/svm/ssvm.h
@@ -37,6 +37,7 @@
#include <vppinfra/heap.h>
#include <vppinfra/pool.h>
#include <vppinfra/format.h>
+#include <vppinfra/lock.h>
#ifndef MMAP_PAGESIZE
#define MMAP_PAGESIZE (clib_mem_get_page_size())
@@ -104,7 +105,7 @@ ssvm_lock (ssvm_shared_header_t * h, u32 my_pid, u32 tag)
}
while (clib_atomic_test_and_set (&h->lock))
- ;
+ CLIB_PAUSE ();
h->owner_pid = my_pid;
h->recursion_count = 1;
@@ -115,7 +116,7 @@ always_inline void
ssvm_lock_non_recursive (ssvm_shared_header_t * h, u32 tag)
{
while (clib_atomic_test_and_set (&h->lock))
- ;
+ CLIB_PAUSE ();
h->tag = tag;
}