gwj / at91sam9263 · Commits

Commit 603d3e79b2c64bceb8826d3d65b525188db47797

Authored by aurel32
1 parent b2eb849d

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@4341 c046a42c-6fe2-441c-8c8c-71466251a162
Inline Side-by-side
Showing 1 changed file with 1 additions and 0 deletions
... ... @@ -4030,6 +4030,7 @@ static TAPState *net_tap_fd_init(VLANState *vlan, int fd)
4030 4030 if (!s)
4031 4031 return NULL;
4032 4032 s->fd = fd;
  4033 + enable_sigio_timer(fd);
4033 4034 s->vc = qemu_new_vlan_client(vlan, tap_receive, NULL, s);
4034 4035 qemu_set_fd_handler(s->fd, tap_send, NULL, s);
4035 4036 snprintf(s->vc->info_str, sizeof(s->vc->info_str), "tap: fd=%d", fd);
... ...