gnrc: some memory optimizations

RIOT-OS · Nov 2, 2022 · 345f7c6 · 345f7c6
1 parent 6775836
commit 345f7c6
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Showing 2 changed files with 7 additions and 1 deletion.
diff --git a/sys/include/net/gnrc/pktbuf.h b/sys/include/net/gnrc/pktbuf.h
@@ -35,6 +35,7 @@
 #include <string.h>
 
 #include "cpu_conf.h"
+#include "kernel_defines.h"
 #include "mutex.h"
 #include "net/gnrc/pkt.h"
 #include "net/gnrc/neterr.h"
@@ -61,7 +62,11 @@ extern "C" {
  *          management to allocate packets.
  */
 #ifndef CONFIG_GNRC_PKTBUF_SIZE
-#define CONFIG_GNRC_PKTBUF_SIZE    (6144)
+# if !IS_USED(MODULE_GNRC_SCHC)
+#  define CONFIG_GNRC_PKTBUF_SIZE  (6144)
+# else
+#  define CONFIG_GNRC_PKTBUF_SIZE  (4096) /* libSCHC uses its own buffers */
+# endif
 #endif
 /** @} */
 

diff --git a/sys/net/gnrc/pktbuf/Kconfig b/sys/net/gnrc/pktbuf/Kconfig
@@ -14,6 +14,7 @@ if KCONFIG_USEMODULE_GNRC_PKTBUF_STATIC
 
 config GNRC_PKTBUF_SIZE
     int "Maximum size of the static packet buffer"
+    default 4096 if USEMODULE_GNRC_SCHC
     default 6144
     help
         Set the value to 0 to allow dynamic memory management to allocate