genode/ports-foc/patches/tcp_mem.patch
Stefan Kalkowski c12d2f80f2 L4lx: re-apply network performance hook
Re-enable tcp-patch introduced by Sebastian Sumpf that tweaks TCP rmem,
and wmem buffer sizes to show better performance results.
2012-09-24 09:18:00 +02:00

19 lines
616 B
Diff

Index: net/ipv4/tcp.c
===================================================================
--- net/ipv4/tcp.c (revision 25)
+++ net/ipv4/tcp.c (working copy)
@@ -3549,6 +3549,13 @@
tcp_init_mem(&init_net);
/* Set per-socket limits to no more than 1/128 the pressure threshold */
limit = nr_free_buffer_pages() << (PAGE_SHIFT - 7);
+
+ /*
+ * Adjust limit so it performs well on systems with little memory. If
+ * this causes errors increase L4Linux main memory
+ */
+ limit = limit < 768U * 1024 ? 768U * 1024 : limit;
+
max_wshare = min(4UL*1024*1024, limit);
max_rshare = min(6UL*1024*1024, limit);