Improve fifo allocator performance

- add option to preallocate fifos in a segment
- track active fifos with doubly linked list instead of vector
- update udp redirect test code to read fifo pointers from API call
  instead of digging them up from fifo segment header
- input-node based active-open session generator

Change-Id: I804b81e99d95f8690d17e12660c6645995e28a9a
Signed-off-by: Dave Barach <dave@barachs.net>
Signed-off-by: Florin Coras <fcoras@cisco.com>
Signed-off-by: Dave Barach <dbarach@cisco.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/src/svm/svm_fifo.h b/src/svm/svm_fifo.h
index 69369163..9cb93ff4 100644
--- a/src/svm/svm_fifo.h
+++ b/src/svm/svm_fifo.h
@@ -38,7 +38,7 @@ format_function_t format_ooo_list;
 
 #define OOO_SEGMENT_INVALID_INDEX ((u32)~0)
 
-typedef struct
+typedef struct _svm_fifo
 {
   volatile u32 cursize;		/**< current fifo size */
   u32 nitems;
@@ -62,7 +62,8 @@ typedef struct
   ooo_segment_t *ooo_segments;	/**< Pool of ooo segments */
   u32 ooos_list_head;		/**< Head of out-of-order linked-list */
   u32 ooos_newest;		/**< Last segment to have been updated */
-
+  struct _svm_fifo *next;	/**< next in freelist/active chain */
+  struct _svm_fifo *prev;	/**< prev in active chain */
     CLIB_CACHE_LINE_ALIGN_MARK (data);
 } svm_fifo_t;