attilapiros commented on a change in pull request #23278: [SPARK-24920][Core]
Allow sharing Netty's memory pool allocators
URL: https://github.com/apache/spark/pull/23278#discussion_r245601663
##########
File path:
common/network-common/src/main/java/org/apache/spark/network/util/NettyUtils.java
##########
@@ -95,6 +111,38 @@ public static String getRemoteAddress(Channel channel) {
return "<unknown remote>";
}
+ /**
+ * Returns the default number of threads for both the Netty client and
server thread pools.
+ * If numUsableCores is 0, we will use Runtime get an approximate number of
available cores.
+ */
+ public static int defaultNumThreads(int numUsableCores) {
+ final int availableCores;
Review comment:
Why?
That final is correct there: it is basically a constant which can get once
value and it enforces that before any reading of its value it must be
initialised.
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