[kudu-CR] KUDU-1444. Get resource usage of a scan.

["zhen.zhang (Code Review)" <ge...@cloudera.org>]

zhen.zhang has uploaded a new change for review.

  http://gerrit.cloudera.org:8080/3013

Change subject: KUDU-1444. Get resource usage of a scan.
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KUDU-1444. Get resource usage of a scan.

This patch supports to get the resource usage of a scan in client side. The
resource usage information will be sent back to client in every scan
RPC response. This is useful for impala to show these stats in a query profile.

For now, the resource usage only contains bytes_read_from_disk. We may
add more in the future as needed.

Change-Id: Iedaf570a7601651c93275ae0a8565f1e33da842d
---
M src/kudu/cfile/cfile_reader.cc
M src/kudu/client/CMakeLists.txt
M src/kudu/client/client.cc
M src/kudu/client/client.h
A src/kudu/client/resource_usage.h
M src/kudu/client/scanner-internal.h
M src/kudu/tserver/tablet_service.cc
M src/kudu/tserver/tserver.proto
M src/kudu/util/trace_metrics.h
9 files changed, 91 insertions(+), 0 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/13/3013/1
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Gerrit-MessageType: newchange
Gerrit-Change-Id: Iedaf570a7601651c93275ae0a8565f1e33da842d
Gerrit-PatchSet: 1
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: zhen.zhang <zh...@xiaomi.com>