Make rmem configurable
Without tuning it, the raspberry pi kernel appears to apply back
pressure and not receive images. It isn't delivering partial results
either. Kinda annoying to be honest.
Change-Id: If9eae17e8858cc030e38dc5edcffa950450dd8e8
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/aos/network/sctp_lib.cc b/aos/network/sctp_lib.cc
index 99ead37..33d3352 100644
--- a/aos/network/sctp_lib.cc
+++ b/aos/network/sctp_lib.cc
@@ -15,6 +15,7 @@
DEFINE_string(interface, "", "network interface");
DEFINE_bool(disable_ipv6, false, "disable ipv6");
+DEFINE_int32(rmem, 0, "If nonzero, set rmem to this size.");
namespace aos {
namespace message_bridge {
@@ -500,6 +501,10 @@
// The SO_RCVBUF option (also controlled by net.core.rmem_default) needs to be
// decently large but the actual size can be measured by tuning. The defaults
// should be fine. If it isn't big enough, transmission will fail.
+ if (FLAGS_rmem > 0) {
+ size_t rmem = FLAGS_rmem;
+ PCHECK(setsockopt(fd(), SOL_SOCKET, SO_RCVBUF, &rmem, sizeof(rmem)) == 0);
+ }
}
bool SctpReadWrite::ProcessNotification(const Message *message) {