[Impala-ASF-CR] IMPALA-3748: add query-wide resource acquisition step

["Tim Armstrong (Code Review)" <ge...@cloudera.org>]

Tim Armstrong has uploaded a new patch set (#3).

Change subject: IMPALA-3748: add query-wide resource acquisition step
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IMPALA-3748: add query-wide resource acquisition step

This adds a PrepareForExecution() method to QueryState that
allow query execution to fail up-front if resources
cannot be acquires. We don't make full use of this yet,
but it provides a suitable place to acquire a memory
reservation for the query or fail cleanly.

The process memory limit check is moved here so that all
startup memory checks will be eventually consolidated in
one place.

Also switch a boost::mutex to a SpinLock for consistency
and to improve performance (see lock-benchmark.cc).

Change-Id: Ia21a3c0f0b0a7175116883ef9871b93c8ce8bb81
---
M be/src/runtime/coordinator.cc
M be/src/runtime/query-exec-mgr.cc
M be/src/runtime/query-exec-mgr.h
M be/src/runtime/query-state.cc
M be/src/runtime/query-state.h
M be/src/runtime/test-env.cc
6 files changed, 58 insertions(+), 20 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/39/5739/3
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Ia21a3c0f0b0a7175116883ef9871b93c8ce8bb81
Gerrit-PatchSet: 3
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Tim Armstrong <ta...@cloudera.com>