[Akonadi] [Bug 332684] [Maildir] lots of stats calls to /etc/localtime on synchronizing folders

[Martin Steigerwald]

https://bugs.kde.org/show_bug.cgi?id=332684

Martin Steigerwald  changed:

   What|Removed |Added

Version|4.12|5.2.3
 Resolution|UNMAINTAINED|---
 Status|RESOLVED|REOPENED
 Ever confirmed|0   |1

--- Comment #5 from Martin Steigerwald  ---
This still is happening with KMail 5.2.3 (Debian unstable has no newer package
unfortunately and currently I don´t self-compile KDEPIM).

How to reproduce?

1. Start KMail with TZ variable unset.
2. Trace it like this: strace -f -o strace-kmail-stat-localtime.txt -p 16925
3. Click between some (larger) folders.

# Actual Results

~> strace -f -o strace-kmail-stat-localtime.txt -p 16925
strace: Process 16925 attached with 22 threads

~> grep -c "stat(\"/etc/localtime" strace-kmail-stat-localtime.txt 
5496

in just a few seconds of KMail runtime.

# Expected results
Cache what KMail needs from /etc/localtime at least for a while to reduce the
number of calls to that syscall.

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[Akonadi] [Bug 332684] [Maildir] lots of stats calls to /etc/localtime on synchronizing folders

[Denis Kurz]

https://bugs.kde.org/show_bug.cgi?id=332684

Denis Kurz  changed:

   What|Removed |Added

 Resolution|WAITINGFORINFO  |UNMAINTAINED
 Status|NEEDSINFO   |RESOLVED

--- Comment #4 from Denis Kurz  ---
Just as announced in my last comment, I close this bug. If you encounter it
again in a recent version (at least 5.0 aka 15.08), please open a new one
unless it already exists. Thank you for all your input.

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[Akonadi] [Bug 332684] [Maildir] lots of stats calls to /etc/localtime on synchronizing folders

[Denis Kurz via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=332684

Denis Kurz  changed:

   What|Removed |Added

 Status|UNCONFIRMED |NEEDSINFO
 Resolution|--- |WAITINGFORINFO

--- Comment #3 from Denis Kurz  ---
This bug has only been reported for versions older than KDEPIM 4.14 (at most
akonadi-1.3). Can anyone tell if this bug still present?

If noone confirms this bug for a recent version of akonadi (part of KDE
Applications 15.08 or later), it gets closed in about three months.

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[Akonadi] [Bug 332684] [Maildir] lots of stats calls to /etc/localtime on synchronizing folders

[Martin Steigerwald]

https://bugs.kde.org/show_bug.cgi?id=332684

--- Comment #2 from Martin Steigerwald mar...@lichtvoll.de ---
I don´t know where that went to but Dan asked me whether setting TZ to
something will get rid of the stat()´s on /etc/localtime. Yes it does. Still
folder synchronisation is slow:

Bug 334218 - synchronizations of large folders with filesystem contents hogs a
Sandybridge core for minutes stat()ing every file in it

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[Akonadi] [Bug 332684] [Maildir] lots of stats calls to /etc/localtime on synchronizing folders

[Martin Steigerwald]

https://bugs.kde.org/show_bug.cgi?id=332684

--- Comment #1 from Martin Steigerwald mar...@lichtvoll.de ---
akonadi maildir resource is CPU bound on one core (100%) for minutes during
that case. KMail is blocked.

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