kfdtest: Add event-based synchronization mechanism to queues

Wait4PacketConsumption now can accept an event to wait all packets subbmitted to be processed. Change-Id: I1497b7704e892b04d05811b8d3e4742237c1be57 Signed-off-by: xinhui pan <xinhui.pan@amd.com> [ROCm/ROCR-Runtime commit: 9c7cfc0df2]
2018-08-27 14:56:48 +08:00
parent 094073ff74
commit 718af9febc
6 changed files with 44 additions and 2 deletions
@@ -34,6 +34,15 @@ class SDMAQueue : public BaseQueue {
    // @brief Update queue write pointer and set the queue doorbell to the queue write pointer
    virtual void SubmitPacket();

+    /** Wait for all the packets submitted to the queue to be consumed. (i.e. wait until RPTR=WPTR).
+     *  Note that all packets being consumed is not the same as all packets being processed.
+     *  If event is set, wait all packets being processed.
+     *  And we can benefit from that as it has
+     *  1) Less CPU usage (process can sleep, waiting for interrupt).
+     *  2) Lower latency (GPU only updates RPTR in memory periodically).
+     */
+    virtual void Wait4PacketConsumption(HsaEvent *event = NULL);
+
 protected:
    // @ return Write pointer modulo queue size in dwords
    virtual unsigned int Wptr();