[dpdk-dev] [PATCH 3/7] optimize log/panic

[Stephen Hemminger <shemminger@vyatta.com>]

[-- Attachment #1: rte_panic-cold.patch --]
[-- Type: text/plain, Size: 1166 bytes --]

Both logging and calls to panic are never in the critical path.
Use the GCC attribute cold to mark these functions as cold,
which generates more optimised code.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>

---
 lib/librte_eal/common/include/rte_debug.h |    1 +
 lib/librte_eal/common/include/rte_log.h   |    1 +
 2 files changed, 2 insertions(+)

--- a/lib/librte_eal/common/include/rte_debug.h	2013-05-29 08:45:38.888471864 -0700
+++ b/lib/librte_eal/common/include/rte_debug.h	2013-05-29 08:49:12.361864834 -0700
@@ -87,6 +87,7 @@ void rte_dump_registers(void);
  * documentation.
  */
 void __rte_panic(const char *funcname , const char *format, ...)
+	__attribute__((cold))
 	__attribute__((noreturn))
 	__attribute__((format(printf, 2, 3)));
 
--- a/lib/librte_eal/common/include/rte_log.h	2013-03-28 08:50:50.234413869 -0700
+++ b/lib/librte_eal/common/include/rte_log.h	2013-05-29 08:49:12.361864834 -0700
@@ -216,6 +216,7 @@ int rte_log_add_in_history(const char *b
  *   - Negative on error.
  */
 int rte_log(uint32_t level, uint32_t logtype, const char *format, ...)
+	__attribute__((cold))
 	__attribute__((format(printf, 3, 4)));
 
 /**