Improved performance on data-fwd node:

 - Removed full pit entry initialization in favor of a lighter initialization on few fields
 - Squeezed pit entry size in order to store only the number of incomplete faces (as set in HICN_PARAM_PIT_ENTRY_PHOPS_MAX). The bitmap size is now determined by HICN_PARAM_FACES_MAX and optimized to do a fast lookup

Replaced the field is_appface with the field flags in the hicn_buffer_t:

 - is_appface is now a flag with value 0x01 (HICN_BUFFER_FLAGS_FACE_IS_APP)
 - Added flag HICN_BUFFER_FLAGS_PKT_LESS_TWO_CL (0x02) to handle the copy of pkt with length < than 2*CACHE_LINES (in this case cloning is prevented by the cloning function in vpp). Such flag is initialized by the incoming face of the pkt.

Change-Id: Ia956fd5719a28ee29f7fa2fd23d283964743efd8
Signed-off-by: Alberto Compagno <acompagn+fdio@cisco.com>

1 files changed, 6 insertions, 10 deletions

diff --git a/hicn-plugin/src/hashtb.h b/hicn-plugin/src/hashtb.h
index 1690419a1..b74e972b2 100755
--- a/hicn-plugin/src/hashtb.h
+++ b/hicn-plugin/src/hashtb.h
@@ -125,19 +125,15 @@ typedef struct
  * bucket. the node contains an embedded key; long keys are stored as chains
  * of keys.
  *
- * The memory block for a node includes space for client data, additional memory
- * located off the end of the htnode data structure. Size of client-supplied
- * data is fixed, so we can use vpp pools. The PIT and FIB need to ensure
- * that they fit within the available data area, or change the size to
- * accomodate their needs.
+ * The memory block for a node includes space for storing outgoing faces for
+ * interests, additional memory located off the end of the htnode data structure.
  *
- * NOTE: app_data_size currently applies to all apps, i.e. bigger FIB nodes
- * means (leads to, requires) bigger PCS nodes
  */
 
-/* Size this so that we can offer 64B aligned on 64-bits to the applications */
-/* New PIT entry syze 62B */
-#define HICN_HASH_NODE_APP_DATA_SIZE 4184	//to support 512 entry //96 //190 to support 50 faces
+/* Size this so that we can offer 64B aligned on 64-bits for storing outgoing
+ * faces information
+ */
+#define HICN_HASH_NODE_APP_DATA_SIZE 64
 
 /* How to align in the right way */
 typedef struct __attribute__ ((packed)) hicn_hash_node_s