[dpdk-dev] [PATCH 1/2] eal: add macro to mark variable mostly read only

[Pavan Nikhilesh]

Add macro to mark a variable to be mostly read only and place it in a
separate section.

Signed-off-by: Pavan Nikhilesh <pbhagavatula at caviumnetworks.com>
---

 Group together mostly read only data to avoid cacheline bouncing, also
 useful for auditing purposes.

 lib/librte_eal/common/include/rte_common.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/librte_eal/common/include/rte_common.h b/lib/librte_eal/common/include/rte_common.h
index 6c5bc5a76..f2ff2e9e6 100644
--- a/lib/librte_eal/common/include/rte_common.h
+++ b/lib/librte_eal/common/include/rte_common.h
@@ -114,6 +114,11 @@ static void __attribute__((constructor(prio), used)) func(void)
  */
 #define __rte_noinline  __attribute__((noinline))

+/**
+ * Mark a variable to be mostly read only and place it in a separate section.
+ */
+#define __rte_read_mostly __attribute__((__section__(".read_mostly")))
+
 /*********** Macros for pointer arithmetic ********/

 /**
--
2.17.0