Remove no longer needed EventHub usleep() optimization.

This optimization is no longer needed now that the kernel evdev
driver's poll() implementation only wakes up the poll after
the final sync.

Change-Id: If237776861df9cfac3086e744d3bbf3484d4c53b

1 files changed, 0 insertions, 15 deletions

diff --git a/services/input/EventHub.cpp b/services/input/EventHub.cpp
index 990892384181..1f8cf630bc88 100644
--- a/services/input/EventHub.cpp
+++ b/services/input/EventHub.cpp
@@ -156,8 +156,6 @@ EventHub::EventHub(void) :
         mPendingEventCount(0), mPendingEventIndex(0), mPendingINotify(false) {
     acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID);
 
-    mNumCpus = sysconf(_SC_NPROCESSORS_ONLN);
-
     mEpollFd = epoll_create(EPOLL_SIZE_HINT);
     LOG_ALWAYS_FATAL_IF(mEpollFd < 0, "Could not create epoll instance.  errno=%d", errno);
 
@@ -775,19 +773,6 @@ size_t EventHub::getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSiz
         } else {
             // Some events occurred.
             mPendingEventCount = size_t(pollResult);
-
-            // On an SMP system, it is possible for the framework to read input events
-            // faster than the kernel input device driver can produce a complete packet.
-            // Because poll() wakes up as soon as the first input event becomes available,
-            // the framework will often end up reading one event at a time until the
-            // packet is complete.  Instead of one call to read() returning 71 events,
-            // it could take 71 calls to read() each returning 1 event.
-            //
-            // Sleep for a short period of time after waking up from the poll() to give
-            // the kernel time to finish writing the entire packet of input events.
-            if (mNumCpus > 1) {
-                usleep(250);
-            }
         }
     }