[kudu-CR] KUDU-1587 part 1: load meter for ThreadPool

["Alexey Serbin (Code Review)" <ge...@cloudera.org>]

Hello Tidy Bot, Kudu Jenkins, Andrew Wong, Todd Lipcon, 

I'd like you to reexamine a change. Please visit

    http://gerrit.cloudera.org:8080/16332

to look at the new patch set (#2).

Change subject: KUDU-1587 part 1: load meter for ThreadPool
......................................................................

KUDU-1587 part 1: load meter for ThreadPool

This patch introduces a load meter for ThreadPool, aiming to use
active queue management techniques (AQM) such as CoDel [1] in scenarios
where thread pool queue load metrics are applicable (e.g., KUDU-1587).

[1] https://en.wikipedia.org/wiki/CoDel

Change-Id: I640716dc32f193e68361ca623ee7b9271e661d8b
---
M src/kudu/util/threadpool-test.cc
M src/kudu/util/threadpool.cc
M src/kudu/util/threadpool.h
3 files changed, 352 insertions(+), 27 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/32/16332/2
-- 
To view, visit http://gerrit.cloudera.org:8080/16332
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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I640716dc32f193e68361ca623ee7b9271e661d8b
Gerrit-Change-Number: 16332
Gerrit-PatchSet: 2
Gerrit-Owner: Alexey Serbin <as...@cloudera.com>
Gerrit-Reviewer: Andrew Wong <aw...@cloudera.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Tidy Bot (241)
Gerrit-Reviewer: Todd Lipcon <to...@apache.org>