Harmonize vec/pool_get_aligned object sizes and alignment requests

Object sizes must evenly divide alignment requests, or vice
versa. Otherwise, only the first object will be aligned as
requested.

Three choices: add CLIB_CACHE_LINE_ALIGN_MARK(align_me) at
the end of structures, manually pad to an even divisor or multiple of
the alignment request, or use plain vectors/pools.

static assert for enforcement.

Change-Id: I41aa6ff1a58267301d32aaf4b9cd24678ac1c147
Signed-off-by: Dave Barach <dbarach@cisco.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/vnet/bier/bier_fmask.h b/src/vnet/bier/bier_fmask.h
index 81b3923f54c..56930f6cd44 100644
--- a/src/vnet/bier/bier_fmask.h
+++ b/src/vnet/bier/bier_fmask.h
@@ -98,6 +98,11 @@ typedef enum bier_fmask_flags_t_
  */
 typedef struct bier_fmask_t_ {
     /**
+     * Required for pool_get_aligned
+     */
+    CLIB_CACHE_LINE_ALIGN_MARK(cacheline0);
+
+    /**
      * The BIER fmask is a child of a FIB entry in the FIB graph.
      */
     fib_node_t bfm_node;