Bug #80646: ut_delay missing compile barrier (backport to 5.6) #55
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Bug#18842925 : SET THREAD PRIORITY IN INNODB MUTEX SPINLOOP Like "pause" instruction for hyper-threading at Intel CPUs, POWER has special instructions only for hinting priority of hardware-threads. Bug#18814859 : "CACHE_LINE_SIZE IN INNODB SHOULD BE 128 ON POWER") Data arrangement is be better to be conscious about data-cache unit size of CPU, for more CPU cache consistency. Currently it is fixed to 64 bytes in InnoDB, but 128 bytes is better for POWER. Approved by Sunny in rb#6256 Backport of the 5.7 fix - c92102a
UT_RELAX_CPU(): Use a compiler barrier. ut_delay(): Remove the dummy global variable ut_always_false. RB: 11399 Reviewed-by: Jimmy Yang <jimmy.yang@oracle.com> Backported from MySQL-5.7 - patch 5e3efb0
|
Hi, thank you for your contribution. Please confirm this code is submitted under the terms of the OCA (Oracle's Contribution Agreement) you have previously signed by cutting and pasting the following text as a comment: |
|
I confirm the code being submitted is offered under the terms of the OCA, and that I am authorized to contribute it. |
|
Hi, thank you for your contribution. Your code has been assigned to an internal queue. Please follow |
grooverdan
changed the title
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This backports the bug 74832 patches by Marko and Yasufumi (c92102a and 5e3efb0) from 5.7 to 5.6