erts: Move fds with active true behaviour to own pollset

At start of the VM a poll-set that the schedulers
will check is created where fds that have triggered
many (at the moment, many means 10) times without
being deselected inbetween. In this scheduler specific
poll-set fds do not use ONESHOT, which means that the
number of syscalls goes down dramatically for such fds.

This pollset is introduced in order to handle fds that
are used by the erlang distribution and that never
change their state from {active, true}.

This pollset only handles ready_input events,
ready_output is still handled by the poll threads.

During overload, polling the scheduler poll-set is done
on a 10ms timer.

1 files changed, 3 insertions, 2 deletions

diff --git a/erts/emulator/sys/win32/erl_poll.c b/erts/emulator/sys/win32/erl_poll.c
index 5d832f4d34..3843a27a6e 100644
--- a/erts/emulator/sys/win32/erl_poll.c
+++ b/erts/emulator/sys/win32/erl_poll.c
@@ -1018,10 +1018,11 @@ ErtsPollEvents erts_poll_control(ErtsPollSet *ps,
 int erts_poll_wait(ErtsPollSet *ps,
 		   ErtsPollResFd pr[],
 		   int *len,
-                   ErtsThrPrgrData *tpd)
+                   ErtsThrPrgrData *tpd,
+                   Sint64 timeout_in)
 {
     int no_fds;
-    DWORD timeout = INFINITE;
+    DWORD timeout = timeout_in == -1 ? INFINITE : timeout_in;
     EventData* ev;
     int res = 0;
     int num = 0;