Hi,
I am learning to use netmap. Currently I got pkt-gen working (without
drivers). When I try to set packet size above 2048 I got an error.
Searching through the code I found in sys/dev/netmap/netmap_mem2.c the size
constrain. I change it like this:
diff --git a/sys/dev/netmap/netmap_mem2.c b/sys/dev/netmap/netmap_mem2.c
index a15a8c7..8c561cb 100644
--- a/sys/dev/netmap/netmap_mem2.c
+++ b/sys/dev/netmap/netmap_mem2.c
@@ -25,6 +25,7 @@
#ifdef linux
#include "bsd_glue.h"
+#include <linux/vmalloc.h>
#endif /* linux */
#ifdef __APPLE__
@@ -54,7 +55,7 @@ __FBSDID("$FreeBSD: head/sys/dev/netmap/netmap.c 241723
2012-1
#include <dev/netmap/netmap_kern.h>
#include "netmap_mem2.h"
-#define NETMAP_BUF_MAX_NUM 20*4096*2 /* large machine */
+#define NETMAP_BUF_MAX_NUM 10*4096*2 /* large machine */
#define NETMAP_POOL_MAX_NAMSZ 32
@@ -183,7 +184,7 @@ struct netmap_obj_params netmap_params[NETMAP_POOLS_NR]
= {
.num = 200,
},
[NETMAP_BUF_POOL] = {
- .size = 2048,
+ .size = 8192,
.num = NETMAP_BUF_MAX_NUM,
},
};
(first change is not related)
I had to change NETMAP_BUF_MAX_NUM because of the amount of memory needed.
This way I can send packets as big as 8192 (which is what I need). Is there
any problems this will bring on? (maybe decrease the performance or any
other side effect)
thanks
--
David Díaz Barquero
Ingeniería en Computadores
Tecnológico de Costa Rica
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