[Impala-ASF-CR] IMPALA-5073: Use mmap instead of malloc for buffer pool

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

Tim Armstrong has uploaded a new patch set (#2).

Change subject: IMPALA-5073: Use mmap instead of malloc for buffer pool
......................................................................

IMPALA-5073: Use mmap instead of malloc for buffer pool

Allocate with mmap instead of TCMalloc to give more control over memory
usage. Also allocate huge pages when possible to reduce TLB pressure.

Adds additional memory metrics, since we previously relied on the
assumption that all memory was allocated through TCMalloc.
memory.total-used and memory.total-reserved track the total across
the buffer pool and TCMalloc. When the buffer pool is not present,
they just report the TCMalloc values.

ASAN still uses malloc() because it doesn't instrument mmap().

Testing:
Added some unit tests to test edge cases. Many pre-existing tests also
exercise the modified code.

Change-Id: Ifbc748f74adcbbdcfa45f3ec7df98284925acbd6
---
M be/src/catalog/catalogd-main.cc
M be/src/runtime/bufferpool/buffer-allocator-test.cc
M be/src/runtime/bufferpool/buffer-allocator.h
M be/src/runtime/bufferpool/buffer-pool.cc
M be/src/runtime/bufferpool/buffer-pool.h
M be/src/runtime/bufferpool/reservation-tracker.cc
M be/src/runtime/bufferpool/reservation-tracker.h
M be/src/runtime/bufferpool/system-allocator.cc
M be/src/runtime/bufferpool/system-allocator.h
M be/src/runtime/exec-env.cc
M be/src/statestore/statestored-main.cc
M be/src/util/asan.h
M be/src/util/memory-metrics.cc
M be/src/util/memory-metrics.h
M be/src/util/metrics-test.cc
M be/src/util/metrics.h
M common/thrift/generate_error_codes.py
M common/thrift/metrics.json
18 files changed, 355 insertions(+), 34 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/74/6474/2
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Ifbc748f74adcbbdcfa45f3ec7df98284925acbd6
Gerrit-PatchSet: 2
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Tim Armstrong <ta...@cloudera.com>