buffers: major cleanup and improvements

This patch introduces following changes:
- deprecated free lists which are not used and not compatible
  with external buffer managers (i.e. DPDK)
- introduces native support for per-numa buffer pools
- significantly improves performance of buffer alloc and free

Change-Id: I4a8e723ae47056717afd6cac0efe87cb731b5be7
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 56 insertions, 0 deletions

diff --git a/src/vppinfra/cpu.h b/src/vppinfra/cpu.h
index 97e0144be60..7f0d6ad2e34 100644
--- a/src/vppinfra/cpu.h
+++ b/src/vppinfra/cpu.h
@@ -62,6 +62,62 @@
 
 #define CLIB_MARCH_SFX CLIB_MULTIARCH_FN
 
+typedef struct _clib_march_fn_registration
+{
+  void *function;
+  int priority;
+  struct _clib_march_fn_registration *next;
+  char *name;
+} clib_march_fn_registration;
+
+static_always_inline void *
+clib_march_select_fn_ptr (clib_march_fn_registration * r)
+{
+  void *rv = 0;
+  int last_prio = -1;
+
+  while (r)
+    {
+      if (last_prio < r->priority)
+	{
+	  last_prio = r->priority;
+	  rv = r->function;
+	}
+      r = r->next;
+    }
+  return rv;
+}
+
+#define CLIB_MARCH_FN_POINTER(fn) \
+  clib_march_select_fn_ptr (fn##_march_fn_registrations);
+
+#define _CLIB_MARCH_FN_REGISTRATION(fn) \
+static clib_march_fn_registration \
+CLIB_MARCH_SFX(fn##_march_fn_registration) = \
+{ \
+  .name = CLIB_MARCH_VARIANT_STR \
+}; \
+\
+static void __clib_constructor \
+fn##_march_register () \
+{ \
+  clib_march_fn_registration *r; \
+  r = & CLIB_MARCH_SFX (fn##_march_fn_registration); \
+  r->priority = CLIB_MARCH_FN_PRIORITY(); \
+  r->next = fn##_march_fn_registrations; \
+  r->function = CLIB_MARCH_SFX (fn); \
+  fn##_march_fn_registrations = r; \
+}
+
+#ifdef CLIB_MARCH_VARIANT
+#define CLIB_MARCH_FN_REGISTRATION(fn) \
+extern clib_march_fn_registration *fn##_march_fn_registrations; \
+_CLIB_MARCH_FN_REGISTRATION(fn)
+#else
+#define CLIB_MARCH_FN_REGISTRATION(fn) \
+clib_march_fn_registration *fn##_march_fn_registrations = 0; \
+_CLIB_MARCH_FN_REGISTRATION(fn)
+#endif
 #define foreach_x86_64_flags \
 _ (sse3,     1, ecx, 0)   \
 _ (ssse3,    1, ecx, 9)   \