Github user sitalkedia commented on the issue:
https://github.com/apache/spark/pull/15064
@gatorsmile - We do have Linux Perf/flamegraph support for gathering CPU
stats for our Spark jobs. On a per job basis, we run Perf/Jstack periodically
and aggregate the result which is displayed as a flamegraph. Please read
http://www.brendangregg.com/blog/2014-06-12/java-flame-graphs.html to know more
about linux Perf and flamegraph integration. This gives us a aggregated view of
time spent on a particular function across executors running on hundreds of
nodes. This enables us to find hot spots in the code which is super critical
for perf improvements.
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