Reworks top-talkers to greatly improve speed

scripts/lua/modules/callback_utils.lua

@@ -98,6 +98,11 @@ function callback_utils.getLocalHostsIterator(...)
    return getBatchedIterator(interface.getBatchedLocalHostsInfo, "hosts", { ... })
 end
 
+-- A batched iterator over the hosts (both local and remote)
+function callback_utils.getHostsIterator(...)
+   return getBatchedIterator(interface.getBatchedHostsInfo, "hosts", { ... })
+end
+
 -- A batched iterator over the l2 devices
 function callback_utils.getDevicesIterator(...)
    return getBatchedIterator(interface.getBatchedMacsInfo, "macs", { ... })
@@ -141,6 +146,31 @@ function callback_utils.foreachLocalHost(ifname, deadline, callback)
    return true
 end
 
+-- ########################################################
+
+-- Iterates each active host on the ifname interface.
+-- Each host is passed to the callback with some more information.
+function callback_utils.foreachHost(ifname, deadline, callback)
+   local hostbase
+
+   interface.select(ifname)
+
+   local iterator = callback_utils.getHostsIterator(false --[[ no details ]])
+
+   for hostname, hoststats in iterator do
+      if ((deadline ~= nil) and (os.time() >= deadline)) then
+	 -- Out of time
+	 return false
+      end
+
+      if callback(hostname, hoststats) == false then
+	 return false
+      end
+   end
+
+   return true
+end
+
 -- Iterates each device on the ifname interface.
 -- Each device is passed to the callback with some more information.
 function callback_utils.foreachDevice(ifname, deadline, callback)