[HIVE-18866] Semijoin and analyze: Implement a Long -> Hash64 vector fast-path - ASF JIRA

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Details

Type: Improvement
Status: Closed
Priority: Major
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 3.1.0, 4.0.0-alpha-1
Component/s: Vectorization
Labels:
- performance

Target Version/s:

3.1.0

Description

A significant amount of CPU is wasted with JMM restrictions on byte[] arrays.

To transform from one Long -> another Long, this goes into a byte[] array, which shows up as a hotspot.

Attachments

Attachments

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HIVE-18866.04.patch
21/May/18 17:31
11 kB
Sergey Shelukhin
HIVE-18866.03.patch
19/May/18 00:53
11 kB
Sergey Shelukhin
HIVE-18866.02.patch
18/May/18 20:10
11 kB
Sergey Shelukhin
HIVE-18866.01.patch
17/May/18 19:54
11 kB
Sergey Shelukhin
HIVE-18866.patch
17/May/18 03:31
11 kB
Sergey Shelukhin
0001-hash64-WIP.patch
12/May/18 08:32
10 kB
Gopal Vijayaraghavan
perf-hash64-long.png
05/Mar/18 20:26
232 kB
Gopal Vijayaraghavan

Issue Links

breaks

HIVE-19713 itests/hive-jmh should not reference a concreate storage-api version

Closed

is blocked by

HIVE-19660 update branch-3 to be version 3.1 and fix storage-api mismatch

Closed

relates to

HIVE-19501 Fix HyperLogLog to be threadsafe

Resolved

HIVE-19578 HLL merges tempList on every add

Closed

Activity

People

Assignee:: Gopal Vijayaraghavan

Reporter:: Gopal Vijayaraghavan

Votes:: 0 Vote for this issue

Watchers:: 7 Start watching this issue

Dates

Created:: 05/Mar/18 20:25

Updated:: 21/Oct/22 06:59

Resolved:: 24/May/18 02:10