hg: jdk/sandbox: 8234812: Add micros for DatagramChannel send/receive

[chris.hegarty at oracle.com]

Changeset: e826821a469d
Author:    pconcannon
Date:      2020-03-02 16:47 +0000
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/e826821a469d

8234812: Add micros for DatagramChannel send/receive
Summary: Benchmarks for the DatagramChannel::send and DatagramChannel::receive methods
Reviewed-by: alanb, chegar

+ test/micro/org/openjdk/bench/java/nio/DatagramChannelSendReceive.java