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authoraurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162>2008-11-11 13:30:53 +0000
committeraurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162>2008-11-11 13:30:53 +0000
commit3587f82a683122e25da59e1e81150ffde313e54f (patch)
treebcb8df2f484cb6459bb4924413b2351a19eda4f0 /net.c
parent7aa763c72e5f8358e3ba8bbf1bc328cb8e8fc4de (diff)
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qemu: generate signals on tap I/O
Currently tap does not generate signals on I/O; this causes network latency to be dependent on the timer tick (1ms without dyntick, guest dependent with dyntick). By generating a signal on I/O, we can inform the guest immediately that a packet has arrived. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5688 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'net.c')
-rw-r--r--net.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net.c b/net.c
index 35aeb1e..bb9ea6e 100644
--- a/net.c
+++ b/net.c
@@ -622,6 +622,8 @@ static void tap_send(void *opaque)
/* fd support */
+void enable_sigio_timer(int fd);
+
static TAPState *net_tap_fd_init(VLANState *vlan, int fd)
{
TAPState *s;
@@ -630,6 +632,7 @@ static TAPState *net_tap_fd_init(VLANState *vlan, int fd)
if (!s)
return NULL;
s->fd = fd;
+ enable_sigio_timer(fd);
s->vc = qemu_new_vlan_client(vlan, tap_receive, NULL, s);
qemu_set_fd_handler(s->fd, tap_send, NULL, s);
snprintf(s->vc->info_str, sizeof(s->vc->info_str), "tap: fd=%d", fd);