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authorDave Barach <dbarach@cisco.com>2017-06-26 11:35:07 -0400
committerFlorin Coras <florin.coras@gmail.com>2017-07-11 15:40:19 +0000
commit2c25a62cc1cc4937165de740a3b32d78429c72d6 (patch)
treeb860025298501460e21cf8e5722c6155f87495ec /src/svm/ssvm.h
parent8af1b2fdecc883eadfec6b91434adc6044e24cb2 (diff)
Horizontal (nSessions) scaling draft
- Data structure preallocation. - Input state machine fixes for mid-stream 3-way handshake retries. - Batch connections in the builtin_client - Multiple private fifo segment support - Fix elog simultaneous event type registration - Fix sacks when segment hole is added after highest sacked - Add "accepting" session state for sessions pending accept - Add ssvm non-recursive locking - Estimate RTT for syn-ack - Don't init fifo pointers. We're using relative offsets for ooo segments - CLI to dump individual session Change-Id: Ie0598563fd246537bafba4feed7985478ea1d415 Signed-off-by: Dave Barach <dbarach@cisco.com> Signed-off-by: Florin Coras <fcoras@cisco.com>
Diffstat (limited to 'src/svm/ssvm.h')
-rw-r--r--src/svm/ssvm.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/src/svm/ssvm.h b/src/svm/ssvm.h
index bccfc164bef..8466e15579b 100644
--- a/src/svm/ssvm.h
+++ b/src/svm/ssvm.h
@@ -102,6 +102,15 @@ ssvm_lock (ssvm_shared_header_t * h, u32 my_pid, u32 tag)
}
always_inline void
+ssvm_lock_non_recursive (ssvm_shared_header_t * h, u32 tag)
+{
+ while (__sync_lock_test_and_set (&h->lock, 1))
+ ;
+
+ h->tag = tag;
+}
+
+always_inline void
ssvm_unlock (ssvm_shared_header_t * h)
{
if (--h->recursion_count == 0)
@@ -113,6 +122,14 @@ ssvm_unlock (ssvm_shared_header_t * h)
}
}
+always_inline void
+ssvm_unlock_non_recursive (ssvm_shared_header_t * h)
+{
+ h->tag = 0;
+ CLIB_MEMORY_BARRIER ();
+ h->lock = 0;
+}
+
static inline void *
ssvm_push_heap (ssvm_shared_header_t * sh)
{