vppinfra: allocate bihash virtual space on demand

Reduces the vpp image virtual size by multiple gigabytes

Add a "show bihash" command which displays configured and current
virtual space in use by bihash tables.

Modify the .py test framework to call "show bihash" on test tear-down

Type: refactor

Change-Id: Ifc1b7e2c43d29bbef645f6802fa29ff8ef09940c
Signed-off-by: Dave Barach <dave@barachs.net>

1 files changed, 58 insertions, 0 deletions

diff --git a/src/vppinfra/bihash_all_vector.c b/src/vppinfra/bihash_all_vector.c
new file mode 100644
index 00000000000..b6c64a30e0b
--- /dev/null
+++ b/src/vppinfra/bihash_all_vector.c
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vppinfra/mem.h>
+
+/* Vector of all bihashes */
+void **clib_all_bihashes;
+static void **clib_all_bihash_heap;
+
+void *
+clib_all_bihash_set_heap (void)
+{
+  if (PREDICT_FALSE (clib_all_bihash_heap == 0))
+    clib_all_bihash_heap = clib_mem_get_heap ();
+
+  return clib_mem_set_heap (clib_all_bihash_heap);
+}
+
+/*
+ * Leave it to Beaver to change the size of a bihash
+ * by making a clone in a stack local and then copying it...
+ */
+void
+clib_bihash_copied (void *dst, void *src)
+{
+  int i;
+
+  for (i = 0; i < vec_len (clib_all_bihashes); i++)
+    {
+      if (clib_all_bihashes[i] == src)
+	{
+	  clib_all_bihashes[i] = dst;
+	  return;
+	}
+    }
+  clib_warning ("Couldn't find bihash copy source %llx!", src);
+}
+
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */