[MDEV-9172] Analyze patches for IBM System z Created: 2015-11-23  Updated: 2015-12-09  Resolved: 2015-12-09

Status: Closed
Project: MariaDB Server
Component/s: Compiling
Fix Version/s: 10.1.10

Type: Task Priority: Major
Reporter: Kolbe Kegel (Inactive) Assignee: Sergey Vojtovich
Resolution: Fixed Votes: 0
Labels: None

Attachments: File mariadb-10.1.5.diff    
Sprint: 10.0.23

 Description   

Please analyze the patch offered by IBM for building MariaDB 10.1 on IBM z.

 Comments   
Comment by Sergey Vojtovich [ 2015-11-27 ]

serg, please review patch for this task.

Comment by Sergey Vojtovich [ 2015-12-01 ]

A rough benchmark was performed on host running bb slave. In a nutshell: patched code seem to be 2-3% faster.

Benchmark:

SELECT NOW()+0 INTO @start_time;
 
disable_query_log;
 
disable_result_log;
 
let $i= 5000000;
 
while ($i)
 
{
 
  SELECT 1;
 
  dec $i;
 
}
 
enable_query_log;
 
enable_result_log;
 
SELECT NOW()-@start_time;

Benchmark results:

vanilla
 
-------
 
215, 220, 215, 218, 215
 
 
 
optimized
 
---------
 
212, 212, 211, 212, 212

Comment by Sergei Golubchik [ 2015-12-09 ]

ok to push

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