Hello Kudu Jenkins,

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

    http://gerrit.cloudera.org:8080/6742

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

Change subject: external mini cluster: spawn perf record for each daemon during 
Start()
......................................................................

external mini cluster: spawn perf record for each daemon during Start()

I want this for the dense node test, but it's not really possible to do from
outside ExternalMiniCluster without missing out on time spent in Start(),
which I was interested in measuring. So here's a generic approach that can
be used by any itest.

I wasn't sure whether this should be configured via EMC option or gflag. I
ended up with the latter because it's not really something a test needs
programmatic access to; it's just something the dev running the test might
want to enable manually.

I also changed the existing perf calls in full_stack-insert-scan-test to use
the new subprocess custom destroy signal. While there I fixed the handling
of "--call-graph"; passing it without "fp" is a syntax error on both el6.6
and Ubuntu 16.04.

Change-Id: I92079f616648788b461d550057b8e23bc9174b71
---
M src/kudu/integration-tests/external_mini_cluster.cc
M src/kudu/integration-tests/external_mini_cluster.h
M src/kudu/integration-tests/full_stack-insert-scan-test.cc
3 files changed, 58 insertions(+), 30 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/42/6742/2
-- 
To view, visit http://gerrit.cloudera.org:8080/6742
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I92079f616648788b461d550057b8e23bc9174b71
Gerrit-PatchSet: 2
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: Adar Dembo <[email protected]>
Gerrit-Reviewer: Adar Dembo <[email protected]>
Gerrit-Reviewer: David Ribeiro Alves <[email protected]>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Todd Lipcon <[email protected]>

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