[MDEV-32387] Windows : mtr output on is messed up with large MTR_PARALLEL - Jira

Details

Type: Bug
Status: Closed (View Workflow)
Priority: Major
Resolution: Fixed
Affects Version/s: 10.4(EOL), 10.5, 10.6, 10.7(EOL), 10.8(EOL), 10.9(EOL), 10.10(EOL), 10.11, 11.0(EOL), 11.1(EOL), 11.2(EOL), 11.3(EOL)
Fix Version/s: 10.4.32, 10.5.23, 10.6.16, 10.10.7, 10.11.6, 11.0.4, 11.1.3
Component/s: Platform Windows, Tests
Labels:
None

Description

e.g https://buildbot.mariadb.org/#/builders/234/builds/22349/steps/9/logs/stdio contains

innodb.monitor 'innodb'                  w6 [ pass ]    188

main.last_value                          w18 main.information_schema_tables           w11 [ pass ]    455

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Activity

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Sergei Golubchik added a comment - 2023-10-09 21:00

I thought it's not windows-specific

Sergei Golubchik added a comment - 2023-10-09 21:00 I thought it's not windows-specific

Vladislav Vaintroub added a comment - 2023-10-09 21:14 - edited

serg,I thought it is stdout line-buffering specific, which is not working on stdio file handles on Windows.
Based on what I tried this far, perl does not interleave "print" output, but on Linux does not interleave lines, because it outputs only full lines for stdout.
i.e if one thread/process does

print "a1"; print "b2\n";

, and another one

print "c3"; print "d4\n"

on Linux it will print out lines with "a1b2" and "c3d4", whereas on Windows it can also spit "a1c3b2" and "d4"

This can depend on redirection and what not, but I believe so far the complaints were mostly about Windows.

Vladislav Vaintroub added a comment - 2023-10-09 21:14 - edited serg ,I thought it is stdout line-buffering specific, which is not working on stdio file handles on Windows. Based on what I tried this far, perl does not interleave "print" output, but on Linux does not interleave lines , because it outputs only full lines for stdout. i.e if one thread/process does print "a1"; print "b2\n"; , and another one print "c3"; print "d4\n" on Linux it will print out lines with "a1b2" and "c3d4", whereas on Windows it can also spit "a1c3b2" and "d4" This can depend on redirection and what not, but I believe so far the complaints were mostly about Windows.

People

Assignee:: Vladislav Vaintroub

Reporter:: Vladislav Vaintroub

Votes:: 0 Vote for this issue

Watchers:: 2 Start watching this issue

Dates

Created:: 2023-10-09 20:33

Updated:: 2024-10-28 09:45

Resolved:: 2023-10-17 14:34

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